Sears | Craftsman How to Select and Install Electric Motors (single pages) Instruction Guides
There is a CRAFTSMAN MOTOR for every need
ERAFTSMAN ECRAFTSMAN HANDBOOK
A Motor Is Better Than Muscles .....
Yesterday, every household, farm and production task had to be done the hard way — by physical labor. Jobs like heating and refrigeration, sharpening tools, carpet sweeping, loading a silo — even the simple necessity of drawing water — all required muscles . and lots of your own energy, to get them done.
Today, silent, efficient dependable electric motors do all these chores — and hundreds more. Motors are used for just about every kind of work: Garbage disposal, dishwashing, polishing — and heavy-duty labor and production jobs too numerous to mention. Count the electric motors serving you. You'll be surprised at the number.
• BECAUSE Sears Motor Line for the Workshop, Home, Farm—for tools, appliances and machines — is complete . a better motor at the best price for each and every job.
Over 90% of the homes, offices, farms and small businesses (excluding only "heavy" and specialized industries) in the U.S. are furnished electrical power that requires the use of one or another of the kinds of motors in Sears Motor
Line. Also, the great majority of jobs to be done in all these places need motors of the exact types and sizes available at Sears. For convenience, we divide these into four groups, as shown at the bottom of this page. Un-
| 10 | ||
|---|---|---|
| WHY DIFFERENT KINDS | FEATURES OF | SPLIT-PHASE |
| OF MOTORS | & CAPACITOR 1 | (YPE MOTORS |
| (Pages 4-5) | (Pages | 6-7) |
| GENERAL PURPOSE AND | HY-DUTY FARM | SPECIAL APPLICATION |
| POWER TOOL MOTORS | MOUSTRIAL MOTORS | MOTORS |
| (Pages 8-9) | (Pages 10-11) | (Pages 12-13) |
Copywrite 1965 by Sears, Roebuck and Co.
With The RIGHT CRAFTSMAN MOTOR
As wonderfully designed and miracle-working as most motors are, there are limits to the size of load that each can carry — to the neglect and abuse that each can suffer without, damage. You don't expect too much of your muscles. It's just as unreasonable to ask more of a motor than it is designed to give.
Before putting your new motor to work, do it and yourself — the favor of learning something about it. Read this booklet. It tells you how to judge whether or not you have the right motor for your job. It also tells you how to install and maintain your motor so that it will serve you faithfully and tirelessly.
MAKES
THE Motor Easy
HOW TO INSTALL -
ELECTRICAL REQUIREMENTS
(Pages 16-19)
• BECAUSE Sears Information and the Identification Data with each motor make it a quick and simple matter for you to select the exact right motor for your job.
less your job requires a "tailor-built" motor the chances are better than 9 to 1 that you will find the right motor in one of these four Sears classifications.
Because there are four different groups, with many sizes in each group,
your task of finding the right motor might still be difficult, except for the help Sears gives you. Sears Selection and Identification Data make your selection easy. This booklet will also help.
IF SPECIAL SELECTION BECOMES NECESSARY (Pages 14-15)
HOW TO INSTALL — HYSICAL REQUIREMENTS (Pages 20-21)
MOTOR ACCESSORIES (Pages 22-24)
SPECIFIC MOTOR APPLICATIONS (Pages 25-31)
WHY THERE ARE DIFFER
Commercial electricity is manufactured by Power Company generators and transported by wires in the form of current. There are different kinds. DC (direct current) electricity "flows" (like water in a pipe) always in one direction; AC (alternating current) electricity "flows" out then back in equal amounts. Both currents travel at 186,000 miles per sec. — but AC can be made to change its direction with different rapidity (frequency). If it changes 120 times per sec. (so that it makes 60 round trips — out, and back to generator — per sec.) we call it 60-cycle AC. Also used are 25- and 50-cycle.
In addition to different frequencies AC is
also supplied in different phases. Singlephase AC is one current occupying the wires by itself. Polyphase AC is two or more separate currents (from two or more generators) flowing together in the same wires but with the periods of cycling staggered. For instance, 3-phase AC consists of three currents changing their directions at 1/3 intervals.
Every current requires a circuil , an unbroken "path" from the generator to the device using the electricity, and back to the generator. This circuit is formed by conductors (usually wires) enclosed by non-conductors. The amount of current "flowing" in a conductor at any instant is
SERIES-WOUND DC TYPE
AC REPULSION TYPE
AC INDUCTION TYPE (Already Running)
EACH TYPE OF MOTOR IS
DIRECT-CURRENT MOTORS
The earliest kind, DC motors are still used for some purposes, and where only DC power is available.
In a simple, Series Wound DC motor, current "flows" through the wires of a field (stationary part) then through wires on an armature (rotating part). It is conducted to the armature by brushes which rub a commutator on the shaft. In "flowing" it makes the field and armature into magnets having north (N) poles and south (S) poles with like poles adjacent. But like poles repel each other — so the armature rotates 180° to place the unlike poles (which attract each other) adjacent. However, each time the armature rotates 180° the commutator reverses current flow through the armature continutes to rotate.
The above motor will vary in speed with variations in the voltage and the load placed on it, but is powerful at starting. There are also Shunt-Wound and Compound-Wound DC motors.
SINGLE-PHASE AC MOTORS
AC motors are of 4 basic types, but for practical purposes we will consider only the Repulsion and Induction types . The other 2 are: Series-Wound (see Universal Motors), and Synchronous (used mostly for clocks).
REPULSION MOTOR
This is like the Series-Wound DC motor — except that the brushes are connected together, instead of in series with the field. When the field is excited (current turned on), a current (and resulting N and S poles) is created in .the armature by an electrical process called induction . Therefore, the motor will run without the supply current flowing through the armature. It has a powerful starting ability, due to the brushes — but (also due to the brushes) has the disadvantage of slowing down in proportion to its load, the same as a Series-Wound DC motor. Consequently, it is limited in use — and Sears does not carry this type.
INDUCTION MOTOR
When the Repulsion motor (above) is running, a flux (magnetic field) is created by the field magnets which will induce the needed polarity (existence of N and S poles) in the rotating part, without the aid of brushes and a commutator. These parts can be omitted, and we have an Induction motor — and the armature is now called a rotor and the field is called a stator . Some rotors
ENT KINDS OF MOTORS
measured in amperes (A or amps) like water is measured in gallons. The force that "pushes" the current is measured in volts (V) like water pressure is measured in lbs/sq-in, When a current of 1A is pushed by a force of 1V (1Ax1V) an amount of work designated as I Watt (W) will be done. Power companies sell electricity by the Kilowatt Hour — a unit equivalent to 1,000 watts of work in an hour.
Power companies supply current at certain standardized voltages. However, the wires offer a resistance to current flow which diminishes the original volts in proportion to distance. Despite the use of devices to keep voltage constant in the power lines,
there usually is a voltage drop at the point where a current is put to work. Hence, the standard furnished voltages are correctly stated as 115V (approx.), 230V (approx.), and 440V (approx.).
Generally, a 2-wire service (into a building) indicates 115V, 60-cycles, singlephase AC; 3 wires can be 230V ditto (especially in a city) which can be split to make two 115V circuits . or it can be 3-phase, 60-cycle AC at 230V or 440V (especially in rural areas). There are, of course, exceptions. Over 90% of the service to U.S. homes, offices, farms and small businesses is single-phase, 60cycle AC, either at 115V or 230V.
DESIGNED FOR A PURPOSE
are wire wound; some (squirrel-cage type) simply have a series of copper bars embedded in a soft iron core, or are diecast aluminum.
The induction motor has big advantages over other types: It will run practically without loss of speed due to current or load variations, up to the limit of capacity; and is very efficient. But it is not self-starting, so various starting devices are used:
A SPLIT-PHASE motor is an induction motor with a starting winding added to the stator, and arranged to be cut out by a centrifugal switch after the motor is started. For easy-to-start loads where high starting current is not a problem.
A CAPACITOR motor is a Split-Phase motor with a condenser added to reduce the starting current required and increase the starting torque (power). For hard-to-start applications requiring low starting current.
A SHADED-POLE motor is a variation of the Split-Phase motor, without means of cutting out the starting device. It has less starting power and is less efficient in operation.
A REPULSION-INDUCTION motor is a Repulsion motor with a centrifugal switch to cut out the brushes after starting. In some types the brushes are also lifted off the commutator. This motor has all the best features of both types, starting as a Repulsion motor but running as an Induction motor.
POLYPHASE (3-PHASE) AC MOTORS
A 3-PHASE motor is "strictly" an Induction type. It uses 3-phase current (top of page) and is like three separate, single-phase induction motors consolidated into one — with the added advantage that each exerts its "peak pull" during 1/3 of a cycle, while the other two are not at their "peak pull" positions. It has a very powerful start, and a great overload capacity.
UNIVERSAL MOTORS
These are really Series-Wound AC motors designed to perform well on both single-phase AC and DC. Because they will develop destructively high speeds under no load, they are usually used as integral motors in hand power tools or for specific applications where they will be under constant, pre-determined load.
AC SPLIT-PHASE INDUCTION TYPE
CAPACITOR-START INDUCTION TYPE
3-PHASE INDUCTION TYPE
All General-Purpose Split-Phase HAVE THESE
LIFETIME LUBRICATION
All ball-bearing motors have bearings sealed in with a special formula, top-quality grease that assures long, trouble-free service.
The 2-pole sleeve-bearing motors are fitted with 100% felt wicking that holds a large reserve of oil in suspension and distributes oil over bearing surface. Oil slingers on shaft prevent leakage.
Both above types require no lubrication throughout normal motor life.
LEAK-PROOF OILER
General-purpose sleeve-bearing motors have a new type oil-cup plug securely fitted into the end shield to provide constant pressure between the felt wick and motor shaft. Plug is self-sealing, leakproof; the improved wick and packing assure ample oil storage and uniform distribution.
EXTRA COOL OPERATION
Either an extra large "booster" fan with baffles (2-pole models), or two fans — one at each end (all other models) provide positive motor cooling. The resulting uniform, top-efficient cooling helps prevent motor burnout.
TOUGH MYLAR INSULATION
Has 35 times greater moisture resistance and 8 times greater physical strength than ordinary insulation . gives maximum protection.
DEPENDABLE STARTING
Improved type centrifugal governors assure "sure-fire" starts — every time and longer trouble-free life.
NEMA-TYPE BASES
All motors have NEMA standard mounting bases... which assures easy, simple application on any equipment manufactured with provisions for NEMA-type mounting.
PERFORMANCE TESTED
Each motor is individually tested before it is packed to ensure maximum performance and quality. Each design of motor is built to perform at the very top of its NEMA band rating ... thus ensuring full rated HP and performance.
and Capacitor Motors (Pages 8-9) SEARS FEATURES
ANY POSITION OPERATION
New, improved oil retention designs of all sleeve-bearing motors now makes it unnecessary to mount such motors upright. With this new feature all Sears motors (sleeve as well as ball bearing) can be mounted in any position . with shaft up, down, or at any angle!
BUILT-IN GROUND LUG & CONDUIT CONNECTION
These make it easy to make permanent ground connection and/or conduit line connections.
LIGHT-WEIGHT, HEAVY-DUTY CONSTRUCTION
Streamline designs reduce weight up to 30% ... but increase ruggedness and service life of motors. 2-pole models have fully guarded, strong die-cast shells. Other models have new full-size, straight shafts that provide larger bearing surfaces ... also, improved rotor design that eliminates all electrical noises.
CUSTOM ENGINEERED
Each motor is custom designed for a specific line of applications. No compromises are necessary with this complete Sears line. There is a motor designed for every job.
DUST-PROOF SWITCH
Sawdust, lint and other foreign matter cannot cause motor failure because all vital contact points are permanently shielded and protected. This important feature gives Sears fractional hp motors a marked superiority for many tool, appliance and blower applications.
QUICK-CONNECT TERMINALS
Simplified, readily accessible terminal board with plug-in, quick-connect wiring tabs cut wiring time in half. These make it easy to reverse rotation or to change for voltage on models designed for 115/230V.
SEARS POWER TOOL AND
HIGH-TORQUE CAPACITOR TYPES
Both 1725 rpm and 3450 rpm Capacitor Motors (p. 5) for hard-to-start loads, with low starting amps. All for 115/230 V., 60 cyc. AC. Single and double-end shaft types. Starting torques over 300% full-load capacity. Motors can take frequent overloads. Type A is for adverse conditions of excessive moisture or dirt — has ball bearings. Type B in both ball and sleeve bearing models. All have manual reset overload protectors: are easily reversed.
TYPICAL USES
1/3 HP
Planer-Jointers to 4-3/8" Drill Presses to 1/4" Fans to 21" Diameter Air Comp. to 1 cu-ft./min. Feed Mixers to 3-cu-ft. Pumps to 400 gpm at 10 ft.
1/2 HP Jointer-Planers to 6-1/8" Thickness Planers to 6" Wood Shapers Comb. Belt-Disc Sanders Paint Sprayers All Flexible Shafts Air Comp. to 1-1/2 cu-ft./min Port. Concrete Mixers
3/4 HP Bench Saws to 8" Drill Presses to 1/2" Fans to 42" Diameter Air Comp. to 2-1/2 cu-ft./m: Pumps to 1000 gpm at 10 ft. Larger Sprayers
1 HP Bench Saws to 12" Floor Saw, 10" Thickness Planer, 12-1/4" 18" Band Saw Insect Sprayers to 1-1/2 gpm Work Bench Line Shafts
GENERAL - PURPOSE MOTORS
MEDIUM-TORQUE SPLIT-PHASE TYPES
These are all 4-pole (1725 rpm) Split-Phase Motors, as described on page 5... for nottoo-hard to start loads where high starting current is no problem. All are for 120V, 60cycle AC, and have single-end shafts and sleeve bearings. These motors are easily reversed and most models have flexible mountings for quiet operation. All have the appropriate features listed on pages 6-7.
TYPICAL USES
1/2 HP Fans & Blowers to 36" Diameter Air Compressors to 1 cu-ft/min.
1/3 HP, RIGID BASE Wood Lathes, 12"Swing 12" Band Saw 18" Jig Saw 12" Disc Sander 4" Belt Sander Drill Presses, under 3/8" Wet Grindstone Grinder-Hone Comb. Grinder-Hone Comb. Grinders & Buffers to 8" Diameter All Hacksaws Metal Lathes to 12" Swing All Gem Makers
1/3 HP, RESIL. BASE
Fans & Blowers to 24" Diameter
Air Compressors under 1 cu-ft/min.
1/4 HP
Disc Sanders under 12" Grinders & Buffers under 8" Diameter Jig Saws under 18" Small Wood Lathes Drill Presses to 1/4" Fans & Blowers to 18" Diameter Air Compressors to 1/2 cu-ft/min.
HEAVY-DUTY FARM
TYPICAL USES
Pumps — all types Air Compressors Blowers Coolers Large Machine Tools Conveyors Feed Grinders and Mixers Hoists and Lifts Refrigeration Equip. Milking Machines Other Farm Machinery Construction Equip.
10
& INDUSTRIAL MOTORS
TEFC MOTORS (Totally-Enclosed, Fan-Cooled)
All motors in this group are ideal for indoor or outdoor use under all weather conditions. Max. 55o C. Temp. rise. There are four types:
CI - Cap. Start, Ind. Run for 115/ 230V, 60-cyc. AC. Sizes: 1 to 3 hp, 1725 rpm; 2 hp, 3450 rpm. Starting torque up to 350% of full load.
RM (brush riding) and RL (brush lifting) – Rep-Ind. types for 115/230V, 60-cyc.AC. Sizes 1/2 to 7-1/2 hp, 1750 rpm. Starting torque 450%.
3-Phase - Brushless, Ind. type for 208-220/440V, 60/50-cyc., 3-ph. AC. Sizes: 5 to 40 hp, 1800/1500 rpm. Up to 500% starting torque.
OPEN VENTILATED MOTORS
RLC - - Rep. Start, Cap. Runfor 230V, 60-cyc. AC. Brush lifting.
Sizes: 10 and 15 hp, 1750 rpm. Starting torque up to 500% of full load.
All above types have prelubricated ball bearings, single-end shafts, are built for continuous duty under most
severe farm and industrial conditions — where low voltage and low starting current are factors.
bber mount.
SPECIAL APPLICATION LAUNDRY
FOR
LAUNDRY EQUIPMENT
Sears laundry equipment replacement motors will fit all Kenmore and Whirlpool models. All are 1/3 HP to assure full power and peak performance of equipment. Single-speed models operate at 1725 rpm; 2-speed operate at 1140/1725 rpm. All except the wringer-washer motor are equipped with automatic reset overload protectors. All are designed for 110-120V, 60 cyc. AC . have the quality features shown on pages 6-7.
SEARS MOTORS REPLACE OTHER MAKES RATED FROM 1/8 UP TO 1/3 HP
TYPICAL USES
Wringer-Washers Automatic Washers Gas and Elec. Dryers
& OTHER REPLACEMENT MOTORS
OTHER
APPLICATIONS
Sears fan, blower, oil burner and other equipment motors offer maximum power at lowest cost . assure best possible, longlife operation of equipment. Such features as capacitor starting. automatic or manual reset overload protection, two-speed operation, reversibility, special mounting and shaft design, etc. are built into each motor as required by the application. Single-speed models. 1725 rpm: 2-speed, 1140/1725 rpm. All are for 110-120V., 60 cyc. AC . have quality construction shown on bages 6-7.
SEARS MORE POWERFUL MOTORS GIVE BETTER PERFORMANCE – AT LOWER COST
TYPICAL USES
Cellar Drainers Jet Pumps Oil Burners Belted Fans and Blowers (Single and 2-speed) Evaporative Coolers (Single and 2-speed)
HORSEPOWER (HP)
TYPE OF CURRENT
RPM AND DIRECTION OF ROTATIO
TEMPERATURE RISE
IF SPECIAL SELECTION
Consider the electrical and physical characteristics required, and choose a motor accordingly. Always buy a motor as big or bigger (in horsepower) than called for. Extra horsepower, within reason, never hurts; too little horsepower can result in inefficiency and motor burnout. A gasoline engine can be replaced by an AC motor of 75% the size (in HP).
ELECTRICAL CHARACTERISTICS
These will usually be found on the motor nameplate.
If you push a car from a standing start on a level road, it takes an extra effort to start the car, then a smaller (but steady) effort to keep it rolling with occasional spurts of extra effort (again) as the car rolls over bumps. It's the same with a motor attached to a load. Therefore a motor is said to be capable of so much starting torque (push), so much running torque and so much overload torque. Breakdown torque (its maximum push, beyond which it stalls) is also used.
Motor torque is measured by horsepower, The rated HP of a motor is its running torque, at normal running speed. That is, a motor rated at 2 HP can pull with the strength of two horses — for all of its life. At starting, or when required to give an extra spurt of effort, it is said to be overloaded — and the safe overload capacity of a motor is usually stated as so many (say 2 or 5) times the rated HP. But this overload capacity is only a temporary one because a motor heats up rapidly, and may burn out, if overloaded too long or too much.
It is very important to most motors whether you connect them to DC or AC, whether AC is single-, 2- or 3-phase — and whether the voltage is 115 or some other amount. Each is generally designed to run on a certain current with voltage of approximately a certain amount. Actually, there is a loss of voltage in power lines and Power Companies cannot always deliver exact voltages. Therefore, most motors are made to allow 10% voltage variation without harm; but the voltage should not be allowed to drop more than this (except that R-1 and 3-Phase Motors can stand greater drops).
"Feeding" a motor a wrong current or wrong voltage will, at best, reduce its efficiency and life — at worst, can burn it up. It is particularly dangerous to an Induction motor to connect it to a DC line.
Just as you need a certain amount of food to keep going, so a motor needs a continuous supply of amps. And like you, when it works hardest, it needs an extra amount. Therefore, we say that a motor requires so many amps at starting (or for temporary overloads), and so many (generally only 1/3 to 1/4 of the starting amps) for normal running.
If you connect to the right power supply you needn't worry about having enough amps; but you do have to think about the size wires you use between the power source and your motor (wires that are too small can't carry enough amps). When choosing these wires, be sure to have them big enough to carry the starting amps, not just the running amps.
Induction-type motors run at practically constant speed (unless so overloaded as to stall) — and each is therefore rated according to the rpm (revolutions per minute) which its shaft will turn. The two commonest are approx. 1725 and 3450 rpm. You can, of course, obtain higher or lower speeds at the equipment by using various pulley sizes or gears; but it is often inconvenient to change an arrangement already planned for you by the manufacturer. Therefore, it's best to get a motor with the recommended rpm.
For the same reason, you can avoid trouble by getting a motor that revolves in the right direction (clockwise or counterclockwise). However, this is not too important with Sears motors as all can easily be reversed.
Though seldom indicated on a nameplate, you may have heard these terms. They refer to the "heating characteristics" of a motor. Every motor heats up as it runs ( temperature rise ). This rise is not critical unless a motor is overloaded too long — in which case it may overheat and burn out. Special purpose motors are sometimes built to run a while, then stop and cool a while — in which case running time is stated.
BECOMES NECESSARY
N.E.M.A. means National Electrical Manufacturers' Association - the or ganization which coordinates the standardization of motor ratings and di- WHAT IS MEANT BY NEMA
PHYSICAL CHARACTERISTICS
The physical characteristics of a motor (its size, shape, etc.) can be just as important as its electrical characteristics, if it must fit a certain space or drive a specifically designed piece of equipment. Some of a motor's physical characteristics are listed in catalog specifications — others must be observed by looking at the motor, and perhaps by taking measurements.
SIZE AND SWAPE
Obviously, if you have limited space in which to install your motor, size and shape are very important. Not only must you consider whether or not the motor will fit in - it's also important for it to have room to "breathe". All motors require a free circulation of air, to keep from overheating. Don't squeeze one into a space so tight that it will "suffocate" in its own heat!
TYPE AND SIZE OF BASE
Different motors are provided with different types of mounting ar ments. Usually, you can adapt a motor to most any special mounting requirements: Osdany, you can adapt a motor to most any special mounting require-ment (if there's room): but much time and trouble can be saved by getting a motor that will mount where you want it without alteration.
HEIGHT OF SHAFT
When considering the type of base, consider also the height at which the shaft sets above the base. If it is too high, you may have difficulty locating the motor so that it can be connected to your equipment.
KIND OF SHAFT END
Motor shafts come in different sizes (1/2 in., 5/6 in., etc.) — and are of different types. For securing a pulley or tool to be driven by the motor, a shaft is generally slotted — for a key — or flattened (beveled) for use with set screws. Special shafts have detents (depressions for set screws), threads, holes (for pins) etc. If you don't have the right shaft, it's difficult to connect a motor to its load.
Some motors have a shaft at each end (instead of just one end) - which may be quite an advantage for certain purposes.
TYPE OF BEARINGS
Generally there are two types of hearings: Ball and Sleeve The hall bearings will "take" greater thrust loads and abuse, will run quieter and longer... are usually sealed in grease so that no lubrication is mounting position since the oil cup must be above the bearing. However, Sears improved sleeve bearings receive oil and allow the motor
THERMAL OVERLOAD PROTECTOR
When a motor becomes overloaded, it meets the increased demand for power by drawing a higher amperage. This can go on until it is overloaded to the point of stalling — and it will then draw an excessive amperage, so much (in fact) that either the motor or the wires to it will burn up if this condition is not corrected. A fuse in the circuit to the motor will correct this condition, by "blowing" to open the circuit.
Some motors however, have a built-in thermal overload protector, which acts like a fuse to open the circuit, but is more convenient. Two kinds are used: 1) Automatic Reset (which closes the circuit again when motor has cooled sufficiently); and 2) Manual Reset (which can be closed by hand when the motor is cool enough).
SPECIAL HOUSINGS
The average motor housing is built to provide good protection for the motor (from dust and dirt) under normal conditions of motor operation around a home, office or plant. However, special conditions must sometimes be met - as when a motor must run in the presence of explosive fumes (around a gasoline depot). Housings designed for every conceivable special condition are available — but, remember, you must order them specifically.
HOW TO INSTALL YOUR MOTOR
ELECTRICAL REQUIREMENTS
USE LARGE ENOUGH WIRE, SWITCHES, ETC.
Importance of "Safe" Size
All wires and electrical devices (switches, receptacles, etc.) are designed to carry up to a specified load (no. of amps). Overloads may: 1) Cause wires or devices to burn out — with danger of fire; 2) Cause excessive voltage drop (loss of voltage at motor) so that motor runs inefficiently, overheats, and could burn out. Voltage drop should be held to 5% max. for R-I and 3-Phase motors; to 2% max. for all other motors.
Figuring Loads
For a motor, use the "Amps" shown on nameplate —and add 30% for safety. Other appliances are usually rated in watts . Amps = watts volts (i.e.: a 60 watt bulb on a 115V circuit = 60/115 = 0.5 + amps).
Selecting Devices and Wires
Devices are labeled in amps. Wires are rated by diameters with AWG (Am. Wire Gage) Nos.; by type (of covering); and by length. A wire may be just right to carry a certain load for (say) 50 ft; but not to carry it 100 ft. Reason: the longer a wire is the greater the voltage drop at its end.
WIRE LOAD RATINGS (IN AMPS) FOR 50 FT LENGTHS
|
Wire
Size (AWG) |
Armored or Non-
Metallic Cable — or Indoor Wire in Conduit |
Indoor Wire
(Knob & Tube) |
Outside
Wiring |
|
|---|---|---|---|---|
| 14 | 15 | 20 | 30 | |
| 12 | 20 | 25 | 40 | |
| H | 10 | 30 | 40 | 55 |
| MM | 8 | 45 | 55 | 70 |
| 5 | 6 | 65 | 80 | 100 |
| 05 | 4 | 85 | 105 | 130 |
| 님 | 2 | 115 | 140 | 175 |
| 1 | 130 | 165 | 205 | |
| - | 0 | 150 | 195 | 235 |
Ratings in table are for 50 ft lengths of 2-wire cable or extension cord — or 100 ft of single wire. Increase wire by one size for each added 50 (or 100) ft, or fraction thereof. Never use smaller than 14 wire — or ordinary extension cord — for permanent wiring.
USE A SMALL ENOUGH FUSE
Every motor deserves the protection of an individual fuse or circuit breaker designed to "blow" before motor can be damaged. Because the starting amps required are much greater than the normal running amps, a standard fuse big enough not to blow every time motor starts is much too big to protect motor against burn out from continuous overloading. Therefore, only a Time-Lag type of fuse will protect your motor. Use one rated the same as the "Amps" on motor nameplate, plus not more than 25%. On 115/230V circuits, use 2 fuses; use 3 on a 3-phase circuit.
FUSES ARE CHEAPER THAN MOTORS!
MAKING CONNECTIONS AT MOTOR
Your Sears motor will have a cord and plug, or a conduit box with colored wire leads inside it. If there are leads, splice them to the circuit wires according to wiring diagram on motor.
CONNECTING TO AN EXISTING CIRCUIT
Before plugging-in or splicing a motor branch circuit to an existing circuit, check the wire (etc.) sizes — and check the load already on the circuit.
1. Some appliances will be OFF while others are ON. Just total the amps for those which could be ON simultaneously.
2. A 1/4 or 1/3 HP motor can generally be added to an average household circuit without overloading it — and a 1/2 or 3/4 HP motor probably can
if there are no other motors or heating appliances on the circuit. Larger motors usually require a separate circuit.
3. Open the circuit by removing the fuse (or fuses) which controls it.
4. If circuit has a standard fuse(s), substitute Time-Lag fuse(s), or install one in the separate line to motor — unless motor has built-in overload protection.
TOTAL 1640.
TOTALING THE WATTS
AVERAGE RATINGS
| APPLIANCES | WATTS |
|---|---|
| Clothes Dryer | 1500-4500 |
| Coal Stoker | 300 |
| Coffee Maker | . 650-1000 |
| Dishwasher | . 300 |
| Elec. Blanket | 200 |
| Fan-Table | 75-150 |
| -Ventilating | 150-550 |
| Fluores, Tubes | . 15-50 |
| Food Mixer | . 150 |
| Freezer (home) | . 350 |
| Grill (large) | . 660-1000 |
| Heater-Water | . 3000 |
| -Room | . 1000 Up |
| Iron' | . 1000 |
| Ironer | . 1650 |
| Light Bulbs | As Marked |
| Radio-Phono. | . 100 |
| Range (kitchen) | 7000-14000 |
| Refrigerator | 250 |
| Roastér (large) | . 1650 |
| Shaver | . 10 |
| Stove (table) | 1650 |
| Television | . 500 |
| Toaster (auto.) | 1100 |
| Vacuum Clnr. | . 400 |
| Waffle Iron | 660 |
| Wash. Machine | 350-450 |
| Water Pump | 300 |
|
1-PHASE
AC MOTORS |
NORMAL-RUN
AMPS |
||
|---|---|---|---|
| HP | 115V | 230V | |
| 1/6 | 3.2 | 1.6 | |
| 1/4 | 4.6 | 2.3 | |
| 1/3 | 5.6 | 2.8 | |
| 1/2 | 7.4 | 3.7 | |
| 3/4 | 10.2 | 5.1 | |
| 1 | 13.0 | 6.5 | |
| 1 1/2 | 18.4 | 9.2 | |
| 2 | 24.0 | 12.0 | |
| 3 | 34.0 | 17.0 | |
| 5 | 56.0 | 28.0 | |
PROVIDING A NEW BRANCH CIRCUIT
A new branch circuit is one starting at your entrance switch — and may be installed if switch has provision for an additional circuit. Just remember:
1. If spare terminals are exposed and you can connect to entrance switch without disassembling it, simply open the switch to simultaneously shut off all bouse current . If you must disassemble switch or touch any wire leading into it, first have Power Co. shut off your service.
2. Complete the new wiring before connecting it to entrance switch.
3. Check to see that spare terminals in entrance switch are intended to carry load you will connect to them. Usually, fuse sizes are indicated on the switch cover — and you can tell from this:
4. If motor will operate on 115/230V, choose 230V whenever possible.
PROVIDING A NEW MAIN CIRCUIT
If the existing circuits and entrance switch are loaded to capacity — or if you need 230V and have only 115V — you will have to install a new service switch connected directly to the Power Co. lines.
1. Use any suitable size switch and mount this conveniently near the existing entrance switch. Complete all wiring from new switch to motor.
2. Have Power Co. connect new switch to their line — or have them shut off the power while you
make the connection.
3. If lines entering original switch are large enough (Power Co. will advise), you can connect new switch to these lines inside the original switch, as shown. Otherwise, you must provide new leadin wiring to a Service Entrance Head (or Yardpole, on a farm). Complete instructions are given in Sears' booklet "Electric Wiring for Home or Farm" on sale in our Elect. Appliances Dept. for a small sum.
SAFETY NOTES
Never work with existing wires or equipment without first making certain power is OFF.
Check local codes before buying wire or equipment — or doing any wiring.
Avoid long extension cords — they are subject to damage.
For wiring in barns (where dampness and manure fumes rapidly deteriorate ordinary wires and metal) we recommend use of our Single Wire
Trench Cable with Knob and Tube installation together with Bakelite Surface Wiring Devices. Open wiring permits frequent inspection.
Never install devices where someone must stand in dampness or close to machinery to operate them.
In stringing long wires remember to support weight of wire properly — and allow slack to take up the contraction of wire in cold weather.
PHYSICAL MOUNTING REQUIREMENTS
PRE-MOUNTING CHECK
To check against shipping damage, rotate the shaft with your fingers — it should turn freely. Now operate the motor without load — it should run smoothly with a low electrical hum.
SELECTING LOCATION
Locate motor where it will be as dry and cool as possible. Do not expose it to weather, nor enclose it so that it doesn't get free air circulation. (Wire screens around a motor may become clogged and shut off circulation). Also, don't install it where possible sparks could ignite grain dust or similar inflammables — unless it is a special enclosed type.
MOUNTING
Bronze bearing motors should be mounted horizontally — to prevent the oil from draining out of the oil cups. Ball bearing motors may be mounted in any position.
If quiet operation is desired, motor may be mounted on rubber or spring cushions — but this will cause it to "float" and is not advisable when exact shaft alignment is required.
There are two methods of maintaining belt tension. 1) Use the motor base slots, and slide the motor to tighten the belt. 2) Use a motor rail as illustrated. In either case, make the retaining bolts secure.
MEASURING FOR V-BELTS
You can measure with string or tape around the outside edges (not in the grooves) of the motor pulley and driven pulley — to obtain belt length. Length can also be figured as shown in accompanying illustration.
A belt should be just tight enough so that finger pressure midway between pulleys will deflect it about 1/4 inch. If too loose, slippage of the pulleys will wear it out. If too tight, it increases motor load and wear on the bearings.
SELECTING PULLEYS
V-pulleys are measured from edge to edge ( not in groove). The following table gives you the speeds of driven pulleys when using various combinations of drive and driven pulley sizes (in inches).
| DIAM. | D | AMETER | OF PULLE | ON MA | CHINE, IN | ICHES | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PULLEY | 11/4 | 11/2 | 13/4 | 2 | 21/4 | 21/2 | 3 | 4 | 5 | 61/2 | 8 | 10 | 12 | 15 | 18 |
| 11/4 | 1725 | 1435 | 1230 | 1075 | 950 | 850 | 715 | 540 | 430 | 330 | 265 | 215 | 175 | 140 | 115 |
| 11/2 | 2075 | 1725 | 1475 | 1290 | 1140 | 1030 | 850 | 645 | 515 | 395 | 320 | 265 | 215 | 170 | 140 |
| 13/4 | 2400 | 2000 | 1725 | 1500 | 1340 | 1200 | 1000 | 750 | 600 | 460 | 375 | 315 | 250 | 200 | 165 |
| 2 | 2775 | 2290 | 1970 | 1725 | 1530 | 1375 | 1145 | 850 | 685 | 530 | 430 | 345 | 285 | 230 | 190 |
| 21/4 | 3100 | 2580 | 2200 | 1930 | 1725 | 1550 | 1290 | 965 | 775 | 595 | 485 | 385 | 325 | 255 | 215 |
| 21/2 | 3450 | 2870 | 2460 | 2150 | 1900 | 1725 | 1435 | 1075 | 850 | 660 | 540 | 430 | 355 | 285 | 240 |
| 3 | 4140 | 3450 | 2950 | 2580 | 2290 | 2070 | 1725 | 1290 | 1070 | 800 | 615 | 515 | 430 | 345 | 285 |
| 4 | 5500 | 4575 | 3950 | 3450 | 3060 | 2775 | 2295 | 1725 | 1375 | 1060 | 860 | 700 | 575 | 460 | 375 |
| 5 | 6850 | 5750 | 4920 | 4300 | 3825 | 3450 | 2865 | 2150 | 1725 | 1325 | 1075 | 860 | 715 | 575 | 475 |
| 61/2 | 8950 | 7475 | 6400 | 5600 | 4975 | 4480 | 3730 | 2790 | 2240 | 1725 | 1400 | 1120 | 930 | 745 | 620 |
| 8 | 9200 | 7870 | 6900 | 6125 | 5520 | 4600 | 3450 | 2750 | 2120 | 1725 | 1375 | 1140 | 915 | 765 | |
| 10 | 1.75 | 9850 | 8620 | 7670 | 6900 | 5750 | 4300 | 3450 | 2650 | 2150 | 1725 | 1430 | 1140 | 950 | |
| 12 | 0000 | 9200 | 8280 | 6900 | 5160 | 4130 | 3180 | 2580 | 2075 | 1725 | 1375 | 1140 | |||
| 15 | 1.1.1.1.1.1 | Parties. | 8635 | 6470 | 5170 | 3970 | 3230 | 2580 | 2150 | 1725 | 1425 | ||||
| 18 | 1.100 | Concerna de la | 7750 | 6200 | 4770 | 3880 | 3100 | 2580 | 2070 | 1725 |
DRIVEN pulley speed based on use of a 1,725 rpm motor. For a 3,450 rpm motor double the speeds listed. The formula for figuring speeds is:
Dia. of Drive Pulley Dia. of Driven Pulley = Speed of Machine Speed of Motor
PRECAUTIONS THAT WILL SAVE YOUR MOTOR
DON'T OVERLOAD MOTOR
Overloading a motor can burn it out. Don't expect it to run continuously overloaded.
DON'T LET VOLTAGE DROP
When voltage at motor drops, exactly the same thing happens as when the motor is overloaded. With too little "fuel" it is (in effect) overworked — heats up — and will burn out. Use ample size wiring.
DON'T "SUFFOCATE" MOTOR
If free circulation of air to a motor is restricted (by dirt, rags or paper, or closing it up in a box) it overheats — may burn out. Keep motor clean , and dry.
If used where wood chips, dust, etc. can enter inside, blow out the interior with dry compressed air — or use a vacuum cleaner.
GROUND MOTOR PROPERLY
The motor frame should be connected, by wire of same size used in line to motor, to a suitable ground (water pipes or a grounding rod properly installed) — both to protect you, and to protect the motor in case of an internal short circuit.
LUBRICATE MOTOR PROPERLY
Motors with bronze bearings do require occasional — but not too frequent or excessive — lubrication. It's best to check yearly and add a few drops each time. Too much oil can cause trouble by getting out of the bearing into the motor.
USE RE-SET PROPERLY
If you have an overload protector with a manual reset button, always wait for motor to cool before using the re-set. Never hammer the re-set (if it seems to "stick"), as this will break off the switch parts. Any trouble with re-setting will probably be due to dust between the contacts — and blowing away the dust, or simply holding the button in firmly, will correct this.
MOTOR ACCESSORIES..
CRAFTSMAN MATCHED V-BELTS
MATCHED FRACTIONAL H.P. V-BELTS ARE A SEARS EXCLUSIVE
- Compression section has special compound to maintain rigidity.
- (2) High-tensile rayon cord coated with rubber compound.
- Blend of natural and synthetic rubbers in the tension section.
- High-twist fabric, neoprene impregnated.
THEY PULL TOGETHER OR REPLACE EACH OTHER - PRECISELY
Extra-duty, slip-resistant Craftsman V-Belts are so exactly matched for size that a new one will replace an old one without need for readjustment. Then, too, any
two or more belts used in a multiple drive will pull equally, each doing its share. One will not carry all the load while the other(s) slip, and wear. To be assured of matched belts use the matching code numbers printed on belts. Any two adjacent numbers (such as 19-20 or 20-21, etc.) constitute matched belts. This perfect matching is another Craftsman-like quality feature.
Craftsman belts are also the finest for wearability . they are pre-stretched to fit firmly down in pulley grooves, are water-, heat- and oil-resistant.
PRECISION-MACHINED CRAFTSMAN V-PULLEYS
All Craftsman V-Pulleys are scientifically designed and perfectly balanced, with machined (not simply cast-in) grooves so that belts will grip properly and run truer. This guarantees steady, efficient (no slippage) power transmission. and long-
er belt life. There are accurately reamed, fixed bore types and the new taper-bushed type (above) . all available with or without hubs, with single, double and step-cone grooves and in sizes for every power-tool, machine or line-shaft application.
... for Better, Easier Installations
LINE SHAFTS AND ACCESSORIES
9 - Cup Oiler 10 - Rigid Coupling 11 - Collar 12 - Steel Shaft 13 - Shaft Hanger 14 - Flex. Coupling 15 - Pillow Block
Machine Steel Shafting is available in suitable lengths in 1/2-in., 5/8in. and 3/4-in. diameters for use with 1/2 to 1-1/2 hp motors for driving two or more tools (or machines) with one motor. The Flexible Coupling connects the motor shaft to the line shaft, and is self-aligning to compensate for misalignment of motor mounting. Rigid Couplings are used to add
additional lengths of shafting. The adjustable height Hangers are used at intervals to support the shaft from below, above or the side; or the non-adjustable Pillow Blocks can be used instead. Collars keep the shaft from drifting. Use these accessories to economically power several tools which are not used often enough to require individual motors.
These rails make it easy to mount your motor. The "floating" type provides suspension motor mounting that automatically keeps correct tension on the belt.
Heavy-duty, 8-ft. cord fitted with 3-prong "safety" plug. Use with Split-Phase and Capacitor motors up to 3/4 hp.
POWR-PANL
A safe, convenient, 2plug receptacle with toggle switch — for up to 1 hp total capacity. Fastens to power tool bench.
ON-OFF SWITCH
Handy toggle-type switch fits on motor for easy access and control. For power tool motors up to 3/4 hp.
REVERSING SWITCH
This is a compact switch for instant reversing of any Split-Phase or Capacitor Type motor up to 1 hp. Connection diagram is furnished.
MOTOR ACCESSORIES CONT. MAGNETIC STARTERS
FOR SAFE, HAZZARD-CONTROLLED OPERATIONS ON THE FARM - IN INDUSTRY
GIVES YOU Overload protection Low-voltage trip-out And remote on-off control
Manual Reset Overload Protecto Inside
A TYPICAL MAGNETIC STARTER WITH ON-OFF CONTROL MOUNTED ON THE COVER
AVAILABLE - COMBINED WITH ON-OFF CONTROL - ON ORDER, FOR ANY FARM OR INDUSTRIAL MOTOR
A Magnetic Motor Starter provides safety . for equipment and in-dividuals. First, it will guard you against the hazard of having machinery stop (when power fails). then unexpectedly start up again (when power is restored) to catch you unaware. Second, it will protect your machinery against possible damaging effects of such an unexpected stop and restart. Third, it will protect your motor - by shutting it off instead of letting it run too hot - should line voltage dron too low, or should something happen to overload or stall the motor when no one is around to notice it. And don't forget that a hot-running or stalled motor — with power still on - can become a fire hazard. With Sears Magnetic Starter in the line. power failure, low voltage or an overload condition shuts the motor off ... until you'restart it by manually operating the overload protector in the starter.
The (included, but separate) On-Off Control also has many advantages.
You can use it on the motor, for on-the-spot control . or, if motor is inconveniently situated, can position it elsewhere, at a convenient control location. Having such a separate control for each motor makes it unnecessary to pull a master switch (or disconnect the motor) to shut down just one machine. Moreover, separate Magnetic Starter and On-Off Control units on individual motors can be wired so that manual starting of the motors 'must be done in a given sequence, when this is desirable.
REA is especially desirous that all users equip motors with magnetic starters ... for the safety reasons given above.
TYPICAL USEFUL HOOK-UPS
CONTROLS ON MOTORS OR ELSEWHERE -INTERLOCKED FOR STARTING IN SEQUENCE
WHY SEARS MOTOR LINE IS COMPLETE FOR OVER 90% OF AVERAGE NEEDS
As told on pages 4-5 there are two major types of current (AC and DC) and many variations of each type ... each requiring a different motor design. However, over 90% of the homes, offices, farms and small businesses in the U.S. are serviced with just one type of current, 115/230V, singlephase, 60-cycle AC.
Sears Motor Line includes all the various kinds of motors designed to
run on this one type of current and to do all the many different kinds of work that motors do. Included are motors for hard-starting tools and appliances, medium-starting tools and appliances, appliances requiring special motors, for heavy-duty industrial use, and for economical operation of very heavy farm and industrial equipment. Sizes range from 1/4 hp to 1 hp in the popular types . and up to 75 hp in the "heavy-work" types.
MOTOR IDENTIFICATION DATA IS AN ADDED SAFEGUARD
Every Sears motor is properly and clearly identified by a nameplate giving the motor model number and all the pertinent electrical data relating to the specific motor. Instructions packaged with each motor further identify it . and give all necessary information for wiring to the motor, mounting, maintenance, etc.
In addition, every Sears motor, except only the larger farm and in-
dustrial motors, is packaged in its own individual carrying carton, for your convenience, as illustrated here.
Contained in each carton there is a piece of literature on which are listed the various uses for which the motor is recommended. An identification tag attached to the motor lists the features which adapt it for these end uses; and the nameplate data is repeated on the end of the carton. You can't go wrong!
ALWAYS BUY CRAFTSMAN FOR THE BEST AT A BETTER PRICE
SPECIFIC MOTOR APPLICATIONS POWER TOOLS
Any power tool will perform better when ample horsepower is applied. Ample hp means sufficient starting torque and overload torque, as well as ample running torque. Insufficient hp usually results in rougher, poorer quality work (from slowing of overloaded motor) . and probable damage to the motor. Better have an excess of power, especially for those intermittent (but demanding) overload periods (as when a saw blade encounters a tough knot) than to have too little.
Remember that, even though a Split-Phase motor may have sufficient power for normal operations, a Capacitor motor of same size will provide the extra power needed for occasional tough starts or overloads. Also keep in mind that the totally-enclosed Capacitor motor is the most dependable for any application requiring continuous duty or operation under adverse conditions of dust, etc. Because a tool may be operated under many dif-
ferent conditions ranging from occasional, light usage to continuous, heavy usage in severe conditions, our motor recommendations in the following lists also range from the smallest, lightest-duty motor that can be used up to the best. Within this range, select for your own purpose the right motor for the kind of usage you expect to give it.
Following, there are two lists of tools separated according to rpm of motor needed. Each list is preceded by a list of motors arranged by sizes (hp) and giving the Catalog Nos., motor type, type of bearings, and other pertinent data. Also included opposite each motor is the number of the page where this type of motor is illustrated and more fully described. Note that a reference to "Type A (page 8)" means a totally-enclosed Capacitor motor; and that "Type B (page 8)" is an open-ventilated Capacitor motor (with either sleeve or the more rugged ball bearings, as shown in list).
| /2 np | *Cat. No. 1 | 218 - | oup an in in | Ball | |||
|---|---|---|---|---|---|---|---|
| 3450 RPM | 3/ hp | *Cat. No. 15 | 219 - | ,, | |||
| 0-100 KI M | 1 hp | Cat. No. 1 | 217 - | ., | Sleeve | ( | B, page 8 |
| *Cat. No. 12 | 220 - | " | Ball | ||||
| MOTORS | 1½ hp | *Cat. No. 1 | 221 - | ,, | " | " ) | , |
| morons | 2 hp | Cat. No. 1 | 2735 - | Type C1 ( | page 11 | ) |
dWith manual overload protector - no cord or switch.
TOOLS THAT OPERATE AT 3450 RPM
| 1 | 8'' | |
|---|---|---|
| JOINTER-PLANER | - |
4'' to 6'' See 1725 rpm list
6-1/8'' |
| LINE SHAFTS | - | (Use "biggest" tool on line)½ hp Cap. to 2 hp Cap. |
| POWER SHOP (5-Tool) | ||
| SANDER | 1 | 4" Belt only See 1725 rpm list 6" Belt and 9" Disc ½ hp Cap. to ¾ hp Cap. 12" Disc only See 1725 rpm list |
| SWING SAW | - | 10" ¾ hp Cap. to 1 hp Cap. |
|
тЕ:
- |
6'' | |
| WOOD SHAPER | - | 2½" Max. Spindle Lath |
| 1/4 hp | 4Cat. No. 1210 | - | Sp. Phase, | Sleeve | Bearing | (page 9) | |
|---|---|---|---|---|---|---|---|
| /3 iip | Cat. No. 1222 | _ | Capacitor, | Ball | , , | (A, page 8) | |
| TTOE DOLL | 1/2 hp | +Cat. No. 1212 | Sp. Phase, | Sleeve | (page 9) | ||
| 1/23 KPM | 107.000 | -Cat. No. 1214 | Capacitor. | ,, | (B. page 8) | ||
| *Cat. No. 1213 | 11 | Ball | , , | (ii) Pige (i) | |||
| d Cat. No. 1223 | 11 | (A page 8) | |||||
| and | 3/4 hp | Cat. No. 1224 | 100 | ,, | ,, | ,, | |
| GITG | 1 hp | *Cat. No. 1215 | ,, | ,, | ,, | (B page 8) | |
| Cat. No. 1225 | 100 | 11 | |||||
| 750 0014 | 1% hn | Cat No 12715 | - | 11 | (C1 page 0) | ||
| 1730 KPM | 172 119 | o Cat. No. 1233 | Rep-Ind. | " | ,, | (RL page 11) | |
| 3 hp | d Cat. No. 12745 | Capacitor. | ,, | (C1 page 11) | |||
| • | Cat No 1240 | Rep-Ind. | " | ,, | (RI page 11) | ||
| MOTORS | 5 hn | Cat No. 1241 | 1005- | in in | • • | ||
| 10 hp | o'Cat. No. 1258 | - | Rep-Cap., | 11 | (RLC, page 11 | ||
|
Nos.
moun |
1210, 1211, 1212 c
ting. All sleeve-be |
and
earii |
1214 have re
ng are for 11 |
silient n
5 V; all |
nounting;
ball-beari |
all others rigid
ng for 115/230 |
... all 60 cyc. AC. -With 4-ft. cord — no switch or overload protector. *With 4-ft. cord and manual overload protector — no switch. dWith manual overload protector — no cord or switch.
TOOLS THAT OPERATE AT 1725-1750 RPM
| BAND SAW | - 12", 3 Wheel |
1/3 hp Sp-Ph to 1/3 hp Cap.
1/3 hp Sp-Ph to 1/2 hp Cap. 1 hp Cap. to 1-1/2 hp Cap. |
|---|---|---|
| BUFFER | - See Grinder | and the second |
| DRILL PRESS |
- LtDuty up to ½'' Chuck
- HyDuty ½'' Chuck - Over ½'' Chuck |
1/3 hp Cap. to 1/2 hp Cap.
1/2 hp Cap. to 3/4 hp Cap. 1 hp Cap. and Up |
| FLEX. SHAFTS |
|
1/3 hp Sp-Ph Rigid Base
1/4 hp Sp-Ph to 1/2 hp Cap. |
| GEM MAKER | - 6" or 10" | 1/3 hp Sp-Ph to 1/3 hp Cap. |
| GRINDER-BUFFER | - 6" Wheel(s) |
1/4 hp Sp-Ph to 1/3 hp Cap.
1/3 hp Sp-Ph to 1/2 hp Cap. |
| GRINDSTONE (WET) | - 10" Wheel | 1/4 hp Sp-Ph to 1/3 hp Cap. |
| HACKSAW |
|
1/4 hp Sp-Ph to 1/3 hp Cap.
1/3 hp Sp-Ph to 1/3 hp Cap. |
| JIG SAW | - 18" | 1/3 hp Sp-Ph to 1/2 hp Cap. |
| JOINTER-PLANER | - 4-1/8" |
1/3 hp Sp-Ph to 1/3 hp Cap.
1/3 hp Sp-Ph to 1/3 hp Cap. See 3450 rpm list |
| METAL LATHE |
- 6" Swing
- 12" Swing |
1/4 Sp-Ph to 1/3 hp Cap.
1/3 hp Cap. to 1/2 hp Cap. |
| POLISHING HEAD | - Up to 8'' Wheel(s) | 1/4 hp Sp-Ph to 1/3 hp Cap. |
| SANDER |
- 4" Belt only
- 6" Belt and 9" Disc - 12" Disc only |
1/3 hp Sp-Ph to 1/3 hp Cap.
See 3450 rpm list 1/3 hp Sp-Ph to 1/3 hp Cap. |
|
THICKNESS PLANER
NOTE: |
- 6" and 12¼"
For over 2 hp and up to 5 hp with 12¼" - 20" |
See 3450 rpm list
model, use a 1725 rpm motor. 3 hp Cap. to 10 hp Rep-Cap. |
| WOOD LATHE |
- 8" Swing
- 12" Swing |
1/3 hp Sp-Ph to 1/2 hp Cap.
1/3 hp Sp-Ph to 1/2 hp Cap. |
FARM & INDUSTRIAL EQUIPMENT
Motor selection is explained for each type of equipment. Wherever there is a choice among two or more motors of the same hp, our recommendations are listed in the order of quality — with the best motor last. In such case, a "better" motor may be one having a greater starting and/or overload capacity (usually, with lower starting amps. requirement) . or may be a 3-phase motor for use where power supply will accomodate this even greater capacity and more economical-running type. Wherever there is a choice between an open-ventilated motor and a totally-enclosed, fan-cooled type, the latter type is also shown last (as being a "better" selection for use under adverse weather conditions).
SP - Split-Phase Motor (p. 9) *CAP-A - Encl'd Cap. Motor (p. 8) CAP-B - Open Cap. Motor (p. 8) *CI - Capacitor Motor (p. 11)
| *RL | - Rep-Ind. Motor (p. 11) |
|---|---|
| *RM | - Rep-Ind. Motor (p. 11) |
| RCL | - Rep-Cap. Motor (p. 11) |
| *3-Ph. | - Squirrel-Cage Ind. Motor |
| (p. 11) |
*Totally-Enclosed, Fan-Cooled Types
NOTE: In addition to the above Catalog Listed motors Sears also carries Explosion-Proof (XP) Motors and Totally-Enclosed Non-Ventilated (TENV) Motors. These are available from 1/3 to 15 hp and can be ordered specially instead of one of the recommended motors, if your application requires. Refer to Sears Personal Service Department for prices and other information . . or for assistance in making your selection.
If in doubt, select the best or a greater hp motor rather than underpower your application!
IR COMPRESSORS
Horsepower is determined according to operating pressure (LBS.
PRESS.) and cu. ft. of free air displaced per min. (CFM).
| CEM | LBS. | HP | MOTOR CAT, NO. |
|---|---|---|---|
| PRESS. | |||
| 3.4 | 80 | -1/2 | 1213 (CAP-B), 1223 (CAP-A) or 1230 (RM) |
| 4.6 | 11 | 3/4 | 1224 (CAP-A) or 1231 (RM) |
| 7.2 | 112 | 1 | 1215 (CAP-B), 1225 (CAP-A), 12705 (C1) or 1232 (RL) |
| 9.5 | ** | 1-1/2 | 12715 (C1) or 1233 (RL) |
| 3.0 | 2 | 12725 (C1) or 1234 (RL) | |
| 21.0 | 3 | 12745 (C1), 1240 (RL) or 1292 (3-Ph.) | |
| 33.0 | 5 | 1241 (RL) or 1280 (3-Ph.) | |
| ).9 | 100 | 1/3 | 1222 (CAP-A) |
| .5 to 1.9 | 1/2 | 1213 (CAP-B), 1223 (CAP-A) or 1230 (RM) | |
| 3.0 to 3.3 | 3/4 | 1224 (CAP-A) or 1231 (RM) | |
| 3.4 to 4.1 | 1 | 1215 (CAP-B), 1225 (CAP-A), 12705 (C1) or 1232 (RL) | |
| 5.0 | 1-1/2 | 12715 (C1) or 1233 (RL) | |
| B.0 | 2 | 12725 (C1) or 1234 (RL) | |
| 11.0 to 12.0 | 9.7 | 3 | 12745 (C1), 1240 (RL) or 1292 (3-Ph.) |
| 9.0 | 5 | 1241 (RL) or 1280 (3-Ph.) | |
| 30.0 | 7-1/2 | 1242 (RL) or 1281 (3-Ph.) | |
| 0.8 | 150 | 1/3 | 1222 (CAP-A) |
| 1.2 to 1.5 | 10 | 1/2 | 1213 (CAP-B), 1908 (CAP-A) or 1230 (RM) |
| 2.3 to 2.7 | 3/4 | 1224 (CAP-A) or 1231 (RM) | |
| 2.7 to 3.0 | 1 | 1215 (CAP-B), 1225 (CAP-A), 12705 (C1) or 1232 (RL) | |
| 4.0 to 5.1 | ** | 1-1/2 | 12715 (C1) or 1233 (RL) |
| 6.6 to 8.8 | 2 | 12725 (C1) or 1234 (RL) | |
| 9.1 to 12.5 | 11 | 3 | 12745 (C1), 1240 (RL) or 1292 (3-Ph.) |
| 16.0 to 25.0 | 3.2 | 5 | 1241 (RL) or 1280 (3-Ph.) |
| 30.0 | 7-1/2 | 1242 (RL) or 1281 (3-Ph.) | |
| TWO STACE | TVDES | ||
| CEM | IBS | HP | MOTOR CAT. NO. |
| CFM | PRESS. | 11r | MOTOR CAT: NO. |
| 3.8 to 4.1 | 150 | 1-1/2 | 12715 (C1) or 1233 (RL) |
| 5.6 to 5.9 | 150 | 2 | 12725 (C1) or 1234 (RL) |
| 7.4 to 8.0 | > to | 3 | 12745 (C11, 1240 (RL) or 1292 (3-Ph.) |
| 11.6 to 12.0 | 1 | 5 | 1241 (RL) or 1280 (3-Ph.) |
| 17 2 to 19 0 | / 175 | 7-1/2 | 1242 (PL) or 1281 (3-Ph.) |
BARN CLEANERS
Horsepower depends upon the feet of loaded chain in use.
| LOADED CHAIN | HP | MOTOR CAT. NO. |
|---|---|---|
|
Up to 120 ft.
120 to 160 ft. 165 to 225 ft. 230 ft. and Up |
1-1/2
2 3 5 |
1233 (RL)
1234 (RL) 1240 (RL) 1292 (3-Ph) 1241 (RL) or 1280 (3-Ph.) |
BUNK FEEDERS
Horsepower depends upon the feet of loaded conveyor in use.
|
LOADED C
Open Type 9'' Auger |
ONVEYOR
Tube Type *7'' Auger |
HP | MOTOR CAT. NO. |
|---|---|---|---|
|
Up to 50 ft.
60 to 80 ft. 90 to 120 ft. 130 to 160 ft. |
Up to 50 ft.
60 to 70 ft. 80 to 90 ft. 100 to 120 ft. 130 to 160 ft. |
1
1-1/2 2 3 5 |
12705 (Cl) or 1232 (RL)
12715 (Cl) or 1233 (RL) 12725 (Cl) or 1234 (RL) 12745 (Cl), 1240 (RL) or 1292 (3-Ph) 1241 (RL) or 1280 (3-Ph.) |
*If 8" Auger, increase hp to next larger size.
CONCRETE MIXERS
Horsepower is determined by the cu. ft. of concrete delivered per batch. NOTE: Sears Wheelbarrow Model is not included here as this requires a special motor to fit in area provided.
|
CU. FT.
CAPACITY |
HP | MOTOR CAT. NO. |
|---|---|---|
| Up to 1-1/2 | 1/4 | 1210 (SP) |
| 1/2 to 3 | 1/3 | 1211 (SP) |
| 3 to 5 | 1/2 | 1212 (SP) or 1214 (CAP-B) |
CROP DRYERS
Horsepower is rated in accordance with the air delivery in cu. ft. per min. (CFM) at end of duct, and by the temperature rise (TR). NOTE: Typical installations are given below, and are based upon a 10 ft. duct and the burning of 6 gal. of fuel oil per hour.
FEED MIXERS
Horsepower is determined by the bushel capacity of the mixer.
| CFM | TR | HP | MOTOR CAT. NO. |
|---|---|---|---|
|
10,250
8,200 5,900 3,300 |
40°
48° 65° 102° |
3 |
1240 (RL) or
1292 (3-Ph.) |
|
12,200
11,600 10,300 8,700 |
38°
39° ( 41° ( 46° ) |
5 |
1241 (RL) or
1280 (3-Ph.) |
|
14,900
14,300 12,900 11,500 |
34°
35° 37° 39° |
7-1/2 |
1242 (RL) or
1281 (3-Ph.) |
|
17,300
16,600 15,000 13,200 |
30°
31° 34° 36° |
10 | 1258 (RCL) |
|
CAP.
IN BU. |
нр | HOPPER ABOVE FLOOR | HP |
HOPPER BELOW FLOOR
MOTOR CAT. NO. |
|---|---|---|---|---|
|
20
25 40 80 120 |
3/4
1-1/2 2 3 5 |
1231 (RM)
1233 (RL) 1234 (RL) 1240 (RL) 1240 (RL) 1241 (RL) or 12935 (3-Ph.) |
1
2 3 5 7-1/2 |
1232 (RL)
1234 (RL) 1240 (RL) or 1292 (3-Ph) 1241 (RL) or 1280 (3-Ph) 1242 (RL) or 1281 (3-Ph) |
| RAI | N AUGERS | Horsepower | r depends u | pon the length and diameter of the auger tube |
|---|---|---|---|---|
|
TUBE
LGTH. |
TUBE
DIA. |
HP | MOTOR CAT. NO. | |
| Ì | 11 ft. | 4 to 5 in. | 1/2 | 1223 (CAP-A) or 1230 (RM) |
| ** | 6 in. | 3/4 | 1224 (CAP-A) or 1231 (RM) | |
| 16 ft. | 4 in. | 1/2 | 1223 (CAP-A) or 1230 (RM) | |
| 5 in. | 3/4 | 1224 (CAP-A) or 1231 (RM) | ||
| 2.0 | 6 in. | 1 | 1225 (CAP-A), 12705 (C1) or 1232 (RL) | |
| 21 ft. | 4 in. | 1/2 | 1223 (CAP-A) or 1230 (RM) | |
| 5 in. | 1 | 1225 (CAP-A), 12705 (C1) or 1232 (RL) | ||
| 9.9 | 6 in. | 2 | 12725 (C1) or 1234 (RL) | |
| 8 in. | 3 | 12745 (C1), 1240 (RL) or 1292 (3-Ph.) | ||
| 27 ft. | 4 in. | 1/2 | 1223 (CAP-A) or 1230 (RM) | |
| 5 in. | 1-1/2 | 12715 (C1) or 1233 (RL) | ||
| 6 in. | 3 | 12745 (C1), 1240 (RL) or 1292 (3-Ph.) | ||
| 8 in. | 5 | 1241 (RL) or 1280 (3-Ph.) | ||
| 31 ft. | 4 in. | 3/4 | 1224 (CAP-A) or 1231 (RM) | |
| 90 | 5 in. | 2 | 12725 (C1) or 1234 (RL) | |
| 6 to 8 in. | 5 | 1241 (RL) or 1280 (3-Ph.) | ||
| 22 6 | 5 in. | 2 | 12725 (C1) or 1234 (RL) | |
| 6 to 8 in. | 5 | 1241 (RL) or 1280 (3-Ph.) | ||
| A1 60. | 5 in. | 2 | 12725 (C1) or 1234 (RL) | |
| 6 in. | 5 | 1241 (RL) or 1280 (3-Ph.) | ||
| 8 in. | 7.1/2 | 1242 (RL) or 1281 (3-Ph.) | ||
| 51 6 | 8 in | 7-1/2 | 1242 (PL) or 1281 (3-Ph.) |
PAINT SPRAYERS
| FAINT SERATERS | nr | MOTOR CAT. NO. |
|---|---|---|
| (Also see Air Compressors) |
1/3
1/2 |
1222 (CAP-A)
1213 (CAP-B) or 1223 (CAP-A) |
|
For this equipment use the same
or next higher horsepower motor |
3/4
1 |
1224 (CAP-A)
1215 (CAP-B), 1225 (CAP-A) or 12705 (C1) |
|
as original, or as recommended
by manufacturer. |
1-1/2 | 12715 (C1) or 1233 (RL) |
PUMPS, WATER - V-BELT DRIVEN
Each model pump is designed to be driven at a certain rpm by a recommended hp motor . or at several different rpms with a motor of recommended hp for each speed. When driven as specified, a pump will produce tabulated results. In the case of Centrifugal Pumps, these results are tabulated in terms of gals. per min (GPM) under certain head pressures (FT. of HEAD). For Shallow Well Piston Pumps the results are stated simply in gals. per hr. (GPH). Use the same hp motor (and pulley sizes) as the original, or as recommended by manufacturer.
| HP | MOTOR CAT. NO. |
|---|---|
| 1/4 | 1210 (SP) |
| 1/3 | 1211 (SP) or 1222 (CAP-A) |
| 1/2 | 1212 (SP), 1214 (CAP-B) |
| or 1223 (CAP-A) | |
| 3/4 | 1224 (CAP-A) or 1231 (RM) |
| 1 | 1220 (CAP-B), 1225 (CAP- |
| A) or 12705 (C1) | |
|
HP
1/4 1/3 1/2 3/4 1 |
|
Thrower Operation
SILAGE |
silo Dia., FT. | НР | MOTOR CAT. NO. |
|---|---|---|---|
|
Grass, Corn, Haylage
Grass, Corn Grass, Corn Haylage |
10 - 14
16 - 18 20 Up 17 Up |
1/2
3/4 1 1 |
1223 (CAP-A)
1224 (CAP-A) 1225 (CAP-A) or 12705 (C1) 1225 (CAP-A) or 12705 (C1) |
|
Auger Operation
SILAGE |
SILO DIA., FT. | HP | MOTOR CAT. NO. |
|
Grass, Corn, Haylage
Grass, Corn Grass, Corn Haylage |
10 - 14
16 - 18 20 Up 17 Up |
3
5 7-1/2 7-1/2 |
12745 (Cl), 1240 (RL), 1292 (3-Ph)
1241 (RL) or 1280 (3-Ph) 1242 (RL) or 1281 (3-Ph) 1242 (RL) or 1281 (3-Ph) 1242 (RL) or 1281 (3-Ph) |
HOME EQUIPMENT
Specific replacement motors are recommended. Check the selling price on a new motor before having your defective
motor repaired. The new motor may cost you no more . and will provide better performance.
AIR CIRCULATORS
Up to 18" Blade..... *Cat. No. 19835 20 to 30" " ..... * " " 1983
AIR CONDITIONERS -CENTRAL INSTALLATIONS
Single-Speed, 48 Frame ... *Cat. No. 19835 ....................................
| 3 | Ton | ٠ | • | 6 | Cat. | No. | 1240 | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 5 | ,, | • | • | 6 | ** | ** | 1241 | ||||||||
| 7 | 2" | • | • | (0) | 6 | ** | ** | 1242 |
DRYERS (LAUNDRY), AUTOMATIC
| 411 | Modela | 10 | 0 | EL. Y | *Ca | t. No. | 1963 | |
|---|---|---|---|---|---|---|---|---|
| an | models | (Gas | Ot | ciec.) | * " | ** | 1969 |
& FAN, ATTIC
Up to 18'' Blade....................................
+ FURNACES, FORCED WARM AIR -
Single-Speed, 48 Frame ... *Cat. No. 19835 '' ... * '' 1983 Two-Speed, '' '' ... * '' 1971
OIL BURNERS
All Home Models..... óCat. No. 1984
SPRAYERS, INSECTICIDE
1½ GPM ..... ØCat. No. 1215
WASHERS (LAUNDRY), AUTOMATIC
Single-Speed ...................................
WRINGER-WASHERS
All Models ..... Cat. No. 1989
-Motors are designed for low in-rush current ... to minimize light flicker on starting. *Motors equipped with automatic-reset overload protectors. βMotors equipped with manual-reset overload protectors.
There's a Craftsman Grinder
FOR EVERY PURPOSE
SELF-POWERED, 2-WHEEL GRINDERS
The 1/3 hp (6" wheels) and 1/2 hp (7" wheels) models are for heavy-duty, industrial use – are each fitted with on-off switch, integral tool light, and removable quench tray. The 1/3 hp has 115V. split-phase motor; and so does the 1/4 hp homeshop model. The 1/2 hp has a 115/230V. capacitor motor. All three models operate at 3450 rpm... are fitted with one 36 grit and one 60 grit wheel, sturdy wheel guards, eye shields and tool rests... and are ball-bearing, totally-enclosed construction. One of these models will answer your needs - with safety, convenience, economy!
Two 5-in, wheels (one coarse, one fine) driven at 3600 rpm by 120 V. universal motor with togale switch and 8-ft. cord. Two adi, tool rests, two clear plastic shields, built-in storage tray and removable water tray. Take ½x20 thread wheels.
wire brushes, etc. An excellent bargain!
Choice of 6- or 8-in. sizes for use with 1/3 HP, 1725 rpm motors. Adjustable tool rests and removable wheel auards. Ball-bearing construction for long life.
Not for grinding, but excellent for polishing, paint or rust removal. Take ½×20 thread wire wheel brushes, etc. For bench mounting and
GRINDING & ABRASIVE WHEELS
complete assortment of -auality, aluminum-oxide in various popular grits for all Sears grinders.
Slip-on grinding bands fit on hard-rubber, steel-core wheel...are held tight by the centrifugal expansion of the unbreakable wheel.
SEARS, ROEBUCK AND CO. In Canada, Simpsons-Sears, Ltd.
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