Norton Type S-3 Hydraulic Surface Grinding Machine - Manual Grinder, Surface

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MACHINE

INSTRUCTION

MANUAL NoJSOSC-I

NORTON

MACHINE TOOL DIVISION

WORCESTER. MASS. O/SOS USA.

COMPANY

and PARTS

/

/ SHREWSBURY. Em AND

NORTON

WOOD VINE WORKS

MACHINES

LTD.

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TABLE SPEED CONTROL LEVER

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TABLE START-STOP LEVER

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\ CROSS FEED CONTROL

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TABLE DOGS AND

.REVERSE LEVER

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FINE
DOWNFEEB <S HANDWHEEL

INCREMENT

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PUMP & WHEEL

VSTART-STOP

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HAND TABLE
TRAVERSE

LIFTING

HOLES'

CROSS FEED
HANDWHEEL

GREASE POINTS

COVER OIL RESERVOIR

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OPTIONAL'
, EQUIPMENT

AUTOMATIC CROSS FEED
INCREMENT ADJUSTMENT

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CHUCK

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(ON EACH END)

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UNCRATING
LIFTING
LEVELLING

PREPARING MACHINE FOR OPERATION

REASSEMBLY

Hose Connections

Hand Wheels
ELECTRICAL
MOUNTING WHEEL
GUARD

LUBRICATION
HYDRAULIC OIL

VERTICAL SLIDE
CROSS SLIDE

Cross Feed Setting
Cross Feed Direction Control

TABLE TRAVERSE

Table Speed Setting
Table Direction Control
Table Dog Setting

FAMILIARIZATION
TRUING
GRINDING THE WORK

ATTACHMENTS

Wet and Dry

Coolant through Wheel
High Speed
Radius and Tangent Angle Wheel Dresser
Power Wheelhead Positioner

HYDRAULIC SYSTEM

Pressure Adjustment

Removal of Pump Motor

TABLE CONTROL VALVE
HAND TABLE TRAVERSE AND TABLE
CROSS FEED

VERTICAL SLIDE

Gib Adjustment

WHEEL SPINDLE

WHEEL DRIVE BELTS

CENTER GUIDE ROLLS

PROCEDURE FOR GRINDING MAGNETIC CHUCKS

AUTOMATIC PICKER DOWN FEED

WHEEL HEAD MOUNTED TRUING DEVICE

OPERATING S-3

CONSTRUCTION AND SERVICING

TABLE OF CONTENTS

UNCRATING AND HANDLING

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PARTS SECTION

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UNCRATING AND HANDLING

UNCRATING

Your new NORTON 6 x 18" Type S-3 Hydraulic Surface
Grinding Machine has been packed for shipment to provide the maximum
protection during transit. The machine is ruggedly designed and
carefully constructed to produce work of high quality, and therefore,
should receive the treatment of a precision tool.

Many of the small components have been removed from the
machine for shipment and have been packed separately. Check the entire
shipment against the packing list. Report any discrepancies immediately.

LIFTING

There are four two-inch diameter cored holes in the front
and back of the base through which bars may be extended for lifting the
machine. Light sheet metal covers may be clipped into these holes when
your machine arrives. These can be easily removed, and they should be
replaced when the machine has been set up in order to keep contaminating
elements from entering the hydraulic reservoir in the base. Please
exercise caution when sliding lifting rods through the holes to avoid
damage to the interior hydraulic and lubricating piping.

Slings rigged to the lifting bars should be spread, or blocks
placed between the slings and the machine so that the machine will not be
damaged during the lifting.

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The machine weighs approximately 2, 600 pounds uncrated.
Lifting bars and wire or hemp ropes of sufficient capacity to handle this
weight should be selected.

2.

LEVELLING

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The NORTON S-3 Surface Grinder has sufficient stability
built into it so that it may operate successfully on any substantial shop
floor.

When setting the machine in place, slide a steel plate

approximately 6 x 6 x 1/2" under each corner. Now level the machine

by using a sensitive spirit level on the flat sliding table top. Level the
machine from front to back and from side to side by the four adjusting
screws in the base.

Once the level has been established it should last indefinitely,
but it is a good practice to check the level periodically. Checking
becomes more important when the machine has been set on a wooden

floor which may have a tendency to settle. If the machine is on a
concrete floor, be sure the machine is not attached to the floor.

PREPARING THE MACHINE FOR OPERATION

REASSEMBLY

There is very little reassembling to do upon receipt of a
NORTON S-3 Surface Grinder. On export shipments to some countries,
customs requirements make it necessary to ship motors and other
electrical equipment separately. In this case, of course, these units
must be mounted after the macnine has been received. In the majority
of cases, however, the motors and magnetic chucks are shipped mounted

on the machine.

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Remove the protective slushing compound from the bright

surfaces with an organic solvent.

After the machine has been placed, remove the three rods

anchoring the pump unit within the base.
prevent the spring-mounted unit from swinging during transit. With their

removal, the unit should swing freely inside the base,
the tie down rods which hold the sliding table to the base during shipment
once the machine is in place.

Hose Connections

Be sure that all interior hose and pipe connections are tight.
Each hose is equipped at one end with a simple fitting and a union at the
other end. Loosen the union before tightening the fitting, otherwise, the

hose will take a twist which may ruin it. Be sure, also, in tightening
the union, that the hose does not twist. Hydraulic pulsations in a twisted

hose will cause it to break quickly.

Hand Wheels

The hand wheels are easily mounted; refer to the figure 1

in this manual.

These pump motor anchor rods

Be sure to remove

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ELECTRICAL CONNECTIONS

A qualified electrician should make the electrical connection
between the plant power line and the control box on the machine. A
wiring diagram is included with each machine to assist in making this
connection and also to show the electricals found on your particular machine.

MOUNTING THE GRINDING WHEEL

The equipment grinding wheels are packed separately in the
box containing small parts. Before the grinding wheel is mounted on the
sleeve or collet, tap the wheel lightly with a mallet. A clear tone
indicates the wheel is sound; a dull tone means that the wheel may be
cracked and unsafe to use. Slip one of the blotters packed with the wheels
over the sleeve and then mount the wheel. The wheel slips on easily but
without any play. Do not force the wheel onto the sleeve since internal

strains and stresses will be set up in the wheel which may cause it to fail

when grinding.

sheet metal washer which is keyed to the sleeve, and finally, the flange.

Use the spanner wrench supplied with the machine to tighten the flange.

The flange should be brought up only tight enough to hold the wheel securely.
Tightening too much also will cause dangerous stresses in the wheel.

the sleeve firmly into place and secure with the retaining nut. A special

wrench is provided for tightening the retaining nut. The nut has left-hand

threads.

With the wheel in place, slip on another blotter, then the

The assembled wheel and sleeve fit on the spindle nose. Slide

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If a variety of work is to be ground, requiring several wheels
and frequent wheel changes, a separate sleeve for each wheel is desirable
so that the wheel will be permanently mounted until it is discarded.

WHEEL GUARD

The wheel guard is made in two sections.
is held on the end of the wheel spindle housing by three bolts entering
from the housing. The holes for these bolts are elongated so that guard
may be swiveled by loosening the nuts. The front section of the guard
hooks over the three studs on the back section rim. It locks into place by
means of a latch on the right hand side.

The back section of the guard may be adjusted to tilt the

guard in a counterclockwise direction in order to reduce the spray when

a wet grinding attachment is used and when form truing.

DO NOT RUN GRINDING WHEEL WITHOUT MOUNTING THE

FRONT SECTION OF THE WHEEL GUARD IN PLACE.

The back section

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LUBRICATION

The machine was thoroughly lubricated before shipment.
It is recommended, though, to check all lubrication points before
running the machine. (Figures I and 2).

There are four grease fittings on the machine; one on each

of the vertical ways at the back of the machine, one at the base of the
table reverse lever, and one for the cross feed half nut below the cross
feed saddle on the front of the machine. Use a calcium soap base
grease, or equivalent, of medium consistency and smooth texture

intended for general purpose greasing. Grease once a week.

There is an oil cup on the top of the vertical feed housing

which should be filled weekly with a high quality machine oil, 275 to

375 S. U. V.

The table ways are lubricated continuously with the exhaust oil

supplied from the main control valve. The rate of flow of oil to each table
way is controlled by the two needle valves that are under the cross feed saddle.
These valves are exposed when the saddle is in the forward position. The cross

feed ways are gravity fed. Remember to run the hydraulic pump each day in
order to lubricate the ways, even though you intend to grind your work using
hand table traverse. The flow of oil is critical. Too much oil will make the
table and saddle "float, " resulting in erratic grinding actions. Too little

oil will cause excessive wear on the ways.

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HYDRAULIC OIL

The hydraulic oil reservoir is in the base. It has a capacity of

approximately 15 US or 1

below the pump coupling.
from the front of the base and pouring the oil through this opening. Caution
should be used to avoid allowing contaminating elements from entering the
reservoir when adding oil. Always replace the cover.

The recommended hydraulic oil is a high quality combination

hydraulic and lubricating oil with inhibitors for rust, oxidation, and
foaming and with additives for oiliness. An oil with 145 to 175 S. U. V. at
100F is recommended. The oil should be changed and the reservoir

cleaned at least every six months, or more often if conditions warrant.

A suction type cleaning machine is the most effective.

2-| Imperial gallons.

The reservoir is filled by removing the metal cover

The correct oil level is just

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OPERATING THE S-3

VERTICAL SLIDE

To raise or lower the grinding wheel, turn the handwheel
extending from the top of the vertical column.
the handwheel is transmitted through a set of beveled gears to the
vertical feed screw. The feed screw turns in a full nut which is
attached to the base. By turning the handwheel counterclockwise, the
wheel is lowered; conversely, clockwise turning raises the wheel.
The knurled knob in the center of the handwheel is used for making
fine adjustments. The feed rate of the hub is 1/5 the rate of the
handwheel.

Each complete turn of the vertical feed handwheel will
move the vertical slide . 050". One turn of inner knob moves the
slide . 010". The handwheel is graduated in . 0005".
the pointer is graduated in . 0001" .

The maximum vertical distance, table top to bottom of
standard 8" diameter wheel, is 15". The maximum vertical movement
of the wheelhead is 16".

CROSS SLIDE

The motion of turning

The vernier on

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Traversing the Cross Feed Saddle may be done either
manually or hydraulically. The handwheel in the middle of the front
apron is used for manual cross-feed. The handwheel is graduated
in increments of 0. 001". Turning the handwheel clockwise will move
the saddle toward the grinding wheel; counter-clockwise, away from
the wheel.

Cross-Feed Setting

When the table is operated hydraulically, the saddle will
feed automatically at each table reversal. This automatic cross-feed
is adjustable from zero to approximately . 100" per reversal. The
spring loaded knurled knob on the right hand side of the front apron
is pulled out and turned for the desired amount of cross-feed at each
reversal, as noted on the graduated cross-feed hand wheel.

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Cross Feed Direction Control

A handle on top of the saddle, so marked, controls the
direction of cross-feed. There are three positions for the handle;
pushing the handle away from the operator, the saddle will cross-

feed automatically at each table reversal toward the wheel; set at
mid-point, the saddle may be moved in either direction by means of
the handwheel; pulling the handle toward the operator, the saddle will
cross-feed automatically away from the grinding wheel. The direction

of the cross-feed is reversed manually.

TABLE TRAVERSE

The table can be traversed manually or hydraulically.
For manual movement, the table traverse handwheel on the extreme
left hand end of the saddle must be engaged by pushing towards the

saddle. The table will move in the same direction as the handwheel

is turned. Before the table can be traversed hydraulically, the hand-
wheel must be disengaged from the table rack by pulling it out away
from the saddle. This safety interlock feature keeps the table hand-
wheel from spinning as the table is traversed hydraulically. Then,

the hydraulic table traverse can be started by pulling the table Start-
Stop lever out. This lever is to the right of the table traverse handwheel.

Table Speed Setting

The speed of the table traverse is controlled by the knob
directly below the Start-Stop lever and may be varied up to 150 feet
per minute. The table speed will increase when the knob is turned
counter-clockwise. Once the desired speed has been found, it will not be
affected by starting and stopping the table if the Start-Stop lever is used.

Table Direction Control

The direction of hydraulic table traverse is controlled by
the lever on the top of the saddle, the handle of which points toward the
operator. The table will move in the same direction to that in which
the handle is moved. Table direction can be changed either manually

by moving the lever or by means of the table dogs which will trip the
lever as they pass.

Table Dog Setting

The table dogs on this machine can be set with finger pressure

Hammering is not necessary to keep the dogs in place.

To realize fully the maximum grinding time savings, set
the table dogs 2\" to 3" in from the ends of the workpiece when grinding
at 150 f. p. m. table speed. This will compensate for the "overtravel"

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of the table dogs beyond the reverse lever. The overtravel is a design
feature permitting smooth reversals at high table speeds. The table
dogs may have to be reset when the table speed is changed.

FAMILIARIZATION

Having read the previous sections, set the machine up and
try the controls. Push the Table Traverse Handwheel in so it engages
the table rack. Push the Table Start-Stop lever "in" and turn the
table Speed Control knob clockwise as far as it will go. Move the
Cross Feed Direction lever to the middle or "neutral" position and
turn the Cross Feed Increment Knob counter-clockwise to zero. Turn
the Wheel Feed Handwheel clockwise to raise the wheel enough to clear
any work that is on the table. Traverse the table by hand so it is at
the mid-point along the ways. Clamp each table dog about four inches

on either side of the table reversing lever.

Now, push the Wheel Drive Start Button. Next, push the

Pump Drive Start Button. If each of the previous steps has been taken,

there should be no movement of any components.

Start the table traversing by pulling the Start-Stop lever

outward as far as it will go. (Did you disengage the table handwheel?)
Turn the Speed control knob counterclockwise to bring the table up
to full speed. Stop the machine, now, by "pushing in

lever and move the table dogs out to the end of the work table,
the table traversing again. While the table is moving, set the Cross-

Feed Dial to produce desired cross-feed, as noted on the graduated

cross-feed handwheel, and move the Cross-Feed Direction lever in
the direction you want the table to move. The cross-feed will stop at
the end of the saddle traverse and must be reversed manually.

During this preliminary period, experiment with the controls

and familiarize yourself with their function.

the Start-Stop

Start

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TRUING THE GRINDING WHEEL

If a magnetic chuck is used, the diamond holder can be held

on the face of the chuck. If no chuck is used, the diamond holder can be
clamped to the table surface by means of a bolt in the tee slot of the
table. It is good grinding practice to locate the diamond holder on the

left portion of the table. Move the table until the diamond is under the
center of the wheel spindle. Then lower the grinding wheel until it touches
the diamond lightly.
passes beyond the edge of the wheel and then feed down about 0. 0005" and
feed the diamond back across the wheel until it clears the opposite edge.
Repeat this procedure with appropriate down feeding until, by the sound of
the wheel in contact with the diamond, it is certain that the entire face of

the wheel has been dressed to the condition required.

Cross feed the saddle by hand until the diamond

8.

ME

If a roughing operation is to be performed,
fast traverse of the diamond across the wheel face is used, A fine
finish requires a slower traverse. For a finer finish, the diamond
should be moved slowly across the wheel face without any downfeed
of the wheel during the last several passes.

GRINDING THE WORK

Before beginning to grind, set the table dogs for a given
table speed so that the table will reverse at least 3/4" beyond each
end of the work. Refer to Table Dog Setting on page 6.

With the cross feed Start-Stop lever in neutral and the

wheel clearing the work, move the table and allow the edge of the work
to pass beneath the revolving wheel. With one edge of the work under
the wheel, feed down until sparks show. Then move work away from
wheel. Set appropriate vertical and cross feeds. Turn on the coolant
(if the machine is arranged for wet grinding) and throw the cross feed

lever in or out to feed the work across the wheel and pull out the table

Start-Stop lever to start the operation.

After the full width of the piece has passed under and clear
of the wheel, feed the wheel down. Continue feeding the wheel in this
manner and reversing the direction of cross feed until the work has been
ground to size.

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To stop the table ALWAYS allow the wheel to pass off the

work, and then push in the table Start-Stop lever.

The table can be stopped rapidly with the table start-stop
lever. To prevent table coasting at high speeds, stop the table directly
after a reversal is initiated. Oil in the table cylinder will then cause a

quick stop.

Some operators will like to control table Start-Stopping with

the speed control knob . This is not as fast in most cases, but will not

hurt the machine.

It may be necessary to have the table dog pass beyond the

table reverse lever. This is done by firmly holding the table reverse

lever handle in the direction the table is moving and allowing the table

dog to deflect the spring actuated tip of the table reverse lever. Stop

table before it reaches end of stroke.

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ATTACHMENTS

Wet and Dry Grinding

9.

If the S-3 is equipped for wet grinding, a coolant tank is
furnished which holds approximately 20 US or 17 Imperial gallons.
NORTON recommends one of its types of WHEELMATE grinding fluids

(see a Norton representative). If another type is used, follow the

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supplier's instructions for mixing. If the machine is equipped for
dry grinding, attach the dust hood to the wheel guard and connect the
hood of either the central or individual exhaust system.

Coolant through Grinding Wheel

A special coolant tank is mounted on top of the vertical
slide. A sight glass in the tank shows the coolant level. There are
two valves on the coolant line leading from the tank to the front cover
of the wheel guard. The electrically controlled valve permits fluid
to flow ONLY when the wheel motor is running; otherwise, fluid could

enter the wheel when stopped and cause a dangerous unbalance when
the wheel is started. A second valve, with sight glass, is for manual
metering of the coolant by the operator.

The coolant passes through a special sleeve and special
adapter to the wheel. A WHEEL MUST BE USED WHICH DOES NOT
HAVE A METAL OR PLASTIC BUSHING.

Power Wheelhead Positioning Mechanism

Fast, fatigue-free wheel head movement is obtained by a

1/4 h. p. A. C. motor mounted on the vertical wheel slide. The motor

turns the vertical feed screw by means of chain driven bevel gears.

This arrangement may be applied easily to machines in the field as well
as to new machines. The operating lever for rapid power positioning of

the wheel is located on the wheel feed housing. The wheelhead will

move upwards when the lever is held up; down, when the lever is
pressed down. The speed is nine inches per minute. NEVER use the
power-vertical feed to bring the wheel against the work.

CONSTRUCT RUCTION AND SERVICING

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HYDRAULIC SYSTEM

A diagram of the hydraulic system is shown in figure 3.
The pump, direct driven by its own electric motor through a flexible
coupling, draws oil from the reservoir in the base, which has a
capacity of about 15 gallons (US) or 12^ Imperial. Oil is poured
directly into the base through the front. The proper oil level is just
below the pump coupling.

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We recommend that highly refined oil (S. U. V. 145 to

175 at 100°F. ) be used in the hydraulic system,
oily additives for ways lubrication
oxidation.

The

pump and motor unit is mounted in the base on a spring
suspension
end of the manifold block, located below the entrance to the reservoir.

Two pressure lines go from the back of the manifold; the left hand one
to the table control valve, the right hand one to the cross-feed control
valve.

Pressure Adjustment

Remove the cap and loosen the check nut on the bronze screw; screw "in"

the bronze screw to increase pressure, screw "out" to decrease

pressure. The proper hydraulic

may be inserted on the manifold by removing the set screw on top of the

manifold.

of the machine.

unit is removed from the machine.

Removal of Pump Motor

frame. The pressure line from the pump enters the left

Pressure adjustment is made by setting the relief valve:

Each hose is fitted with a union, accessible from the front

Each union is to be disconnected when the motor-pump

and inhibitors

pressure is 150 psi. A pressure gage

and that this oil have

for rust, foam, and

The motor may then be pulled forward and out as the sus

pending springs are disengaged. On replacing the unit, extreme care

should be taken that the hoses are refastened without taking a twist.
hose fitting should be tightened in place first, after which the union should
be tightened.
as this will either loosen the joint or cause the hose to break under the

pulsation of the hydraulic pump. Both halves of the flexible coupling between

the pump and motor should be kept tight on their respective
pressed tightly together. Looseness of these flanges will cause rapid

destruction of the coupling disc. O A/ £ si h h htaxp&L.

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TABLE CONTROL VALVE

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speed control valve and the table reversing valve.

single spool which, when pushed inward, stops the table by blocking

the table exhaust and allowing the oil under pressure to pass directly
to the reservoir. When the spool is pulled outward,
directed to the reversing valve and the table exhaust is unblocked.

The table speed is controlled by turning this spool, thereby changing

the size of the aperture through which the table exhaust passes.

In

setting up the union, be sure that the hose does not twist,

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The table control valve consists

The table start-stop and speed control valve consists of a

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The table reversing valve has two spools. One is a pilot
spool which is connected to the table reversing lever and provides pilot
pressure to either end of the reversing spool (and to the spool in the
cross-feed control valve). The reversing spool directs the pressure
to and exhaust from the table cylinder, and its movement is relatively
slow to provide smooth table reversals.

HAND TABLE TRAVERSE AND TABLE

The hand table traverse unit consists of a shaft mounted
in ball bearings and on which is a pinion meshing with a rack under
the table. This unit is made so an outward pull disengages the hand-
wheel, allowing it to remain at rest while the table is traversed by

power.

A safety interlocking pin between the handwheel shaft and
the table stop-start lever shaft makes it necessary to disengage the
handwheel before the start-stop lever can be pulled out to start the

machine.

The hand table traverse unit is removed by disconnecting

the cap directly back of the handwheel and pulling out the shaft, pinion,

and assembled ball bearings.

The table may be lifted from the machine by unclamping

the latches at either end of the table which hold the ends of the table

piston rods.
desired, when hand operating the machine for a long period of time.

However, this is not absolutely necessary since the resistance of the

hydraulic oil, when the cross-feed handle is in the neutral position, is

very slight.

The table may be disconnected from the piston rod, if

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CROSS

the cross-feed piston and transmitted through the rack on the piston
rod. At each table reversal, pilot pressure from the pilot spool of
the table control valve moves the cross-feed spool. As this spool moves
pressure is allowed to pass through to the cross-feed cylinder, moving
the piston against a spring.
the pressure to the piston is blocked and exhaust takes place, and the
piston is allowed to reposition through the action of the spring.
way clutch on the gear on the pinion shaft does not allow the repositioning
of the piston and rack to move the cross-feed screw.

feed lever,
feed shaft.
to which is keyed the pinion for the rack on the cross-feed piston rod. In

FEED

The impulse for the increment of cross-feed comes from

When the cross-feed spool completes its travel,

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The direction of cross-feed is obtained by moving the cross-

The lever, in turn, moves a sliding gear keyed to the cross-

In one position, the sliding gear engages the gear on a shaft

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a second position, the sliding gear is disengaged from any gear (neutral
for hand movement). In a third position, the sliding gear engages an idler
driven by the gear, on the pinion shaft, already mentioned, thereby
turning the cross-feed screw in the opposite direction.

Amount of automatic cross-feed at table reversal is determined

by the length of stroke of the cross-feed piston. The length of stroke is

adjusted by a stop at the rear of the piston. This stop is adjusted by the cross

feed knob on the right end of the front apron.

The cross feed saddle rests on two flat ways of the cross
slide. The movement of the saddle is guided by a hardened tool steel
rail bolted to the underside of the cross slide at the center. The guide
rail runs through antifriction bearing, hardened tool steel rollers that

are bolted to the machine base. No oil clearance is allowed between the
guide rail and rollers. The cross-feed of the saddle is controlled by the

action of a feed screw and half nut for hand and hydraulic movement.

The roller alignment is critical since it affects the mating
of the feed screw and half nut. A Norton Company serviceman should
be requested to make these adjustments. With normal grinding con
ditions and proper care, however, the alignment of the rollers as set

at our factory will remain indefinitely.

VERTICAL SLIDE

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The vertical slide has three gibs that can be used to compen
sate for wear, two holding gibs and one tracking gib. The adjusting
screws are along the vertical ways and are accessible when the vertical

slide is run up to its highest position.

Gib Adjustment

The gib is adjusted by backing off the retaining nuts and taking
up on the set screws. Frequent adjustments are not necessary. We
strongly recommend that you call for an experienced Norton Serviceman

to make adjustments when they are necessary because the take-up of the
gibs must be "just right" to avoid binding.

WHEEL SPINDLE

The wheel spindle is an antifriction bearing type. It is

sealed for protection from contaminating elements. It has been pre
lubricated to last the life of the spindle. It is built to operate at
2, 750 r. p. m.

The spindle cartridge is secured in the spindle housing by two
set screws in the underside of the housing. The lateral position is
established by aligning the spindle pulley with the drive motor pulley.

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0
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0

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To remove the spindle cartridge loosen the two set screws,
remove the wheel sleeve, and draw the cartridge out of the spindle
housing from the rear of the machine. Reverse the procedure when
installing a new spindle. Be sure the flats in the cartridge case are at

the bottom so the set screws will bear against them. When the pulleys

are in line, tighten the set screws to hold the cartridge in position.
Tighten these set screws carefully in order not to distort the spindle
housing. Align the spindle drive pulley and the motor pulley by using a
straight edge before tightening the set screws. Always use a wheel
puller to remove the wheel mount and the drive from the spindle.

Hammering them off will shorten the life of the bearings.

Do not attempt to repair these spindles. Return them either

to the original manufacturer or to Norton Company.
units and require specialized equipment and facilities for servicing. Do
not disassemble them any more than necessary to remove them from the
machine.

WHEEL DRIVE BELTS

The Type S-3 Surface Grinder is available with either flat
belt or vee belt drive. Care should be exercised when installing a flat
belt. The belt pulleys should be carefully aligned since any misalignment
will cause the belt to stretch on one side, thereby reducing its life.
Special attention should be paid to belt tension. With the belt in place,

run the pulleys for a few minutes to distribute the tension evenly

throughout the belt. The proper tension should be just enough so the

belt will run without flapping. A belt properly aligned and under the
correct tension will last almost indefinitely. The belt is elastic and
resistant to the effects of lubricants. No belt dressing of any type
should be used. The slightly tacky surface of the belt is the source of
its driving ability.

They are precision

■

y

P
P

P

*

P
P

While the installation of the vee type drive belt is not so

critical as the flat belt, improper installation will materially reduce

the life expectancy. Align the belt sheaves carefully. Always use a

straight edge. Do not tighten the spindle cartridge in the housing until
the sheaves are in line. The vee belt depends on the pinching action of
the sheave on the belt for driving.

not be tight, but should have approximately 1/2" of slack at the mid

point between the sheaves.

For this reason, the belt should



14.

*

■

IN THE EVENT OF DIFFICULTY

Should any problem with this surface grinder arise, read
this booklet carefully and in the majority of cases the remedy will be
found herein. For instance, should the table refuse to start, the
operator will first assure himself that the hydraulic pump motor is
running. If it is not, trouble should be looked for in the motor itself,

its wiring or starting switch. If the motor is running, trouble should
be sought in the hydraulic line in the shape of a broken hose or loose
connection.

Using this method of tracking down trouble, the average

mechanic can run and maintain the surface grinder with perfect

assurance. If, however, a difficulty arises that does not respond to
this treatment, a letter, wire or phone call to the Company1 s
office will bring assistance. We request that the machine owner or
operator give us full information such as the serial number of the

machine, when it was purchased and full particulars on the nature of the
trouble. Frequently, it is found that difficulties may be settled by
correspondence or over the telephone if the machine man is explicit

in his description of his problem.

home

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TABLE START-STOP

C- SPEED CONTROL

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STOP LEVER
TABLE SPEEO

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TABLE CYLINDER

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CROSS FEED CONTROL VALVE

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SHUTTLE SPEED. TO CONTROL

CROSS FEED INCREMENT.

SUPPLT PRESSURE

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HYDRAULIC

SYSTEM

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CENTER GUIDE ROLLS

17.

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This machine has a center guide bar attached to the underside
of the saddle. This guide bar runs between four center guide rolls for
maintaining accuracy of saddle motion. The construction is shown by the
drawing on the adjacent page.

As is indicated by this drawing, one of these rolls is concentric
or "fixed. " This is the left rear roll, when facing the machine. The other

three rolls are mounted on an eccentric as indicated by the marking on the

drawing.

At factory assembly of the machine, the left front guide roll is
carefully lined with the "fixed" guide roll. The saddle is placed on the
machine with the guide bar firmly in contact with the left-hand rolls, then
by manipulation of their eccentric mountings, the two right-hand rolls are

brought into firm - but not binding contact - with the guide bar.

Saddle cross motion is then checked, and if necessary, is
corrected by adjustment of the right-hand rolls. Examination of the
machine will show that the adjusting studs for the two front guide rolls
are very close to the base opening. The adjusting stud for the right rear
(eccentrically mounted) guide roll can be felt farther back.

It will also be evident that the adjusting studs are locked by hex
nuts.

Removing the Saddle

The adjusting studs are turned by a socket set screw.

When it becomes necessary to remove the saddle for any reason,
be sure to first back off the right-hand guide rolls. Do not touch the left
front guide roll on receipt of the machine or when removing the table.

The two exceptions to this might be (1) when it is suspected that

the adjustment of the left front stud has been disturbed during shipment;

(2) if after a period of service the sliding table is known to be operating

"out of square" with the center-line of the grinding wheel spindle.

In this case it may be found necessary to make adjustment of

the two front guide rolls, but normally, it will be found that most required

adjustment can be made with the two right-hand

guide rolls only.

18.

grinder.

1.

PROCEDURE FOR GRINDING PERMANENT MAGNET

OR ELECTRO-MAGNET TYPE CHUCKS

Prior to mounting a chuck on the sliding table of a surface

we recommend the following steps be taken.

Place

the chuck, face down, on the sliding table of the surface

grinder.

1

■

■

A c / k

Indicate the surface of the chuck lengthwise and crosswise and

2.

shim as necessary to level the surface to be ground.

Place blocks at each end of the chuck, and using hold down clamps

3.

bolted to the machine table, clamp the blocks snugly against the
ends of the chuck so that it will not move while being ground.

Mount a 23A46-I8VBE, or similar grinding wheel, on to the wheel

4.
sleeve furnishe'd with the machine and mount the assembly on

the spindle.

True wheel - "Open" - by moving diamond across wheel face

5.

rapidly with moderately heavy cut.

6. Grind chuck. The table should be operated at half speed and the

• maximum depth of cut should be . 0002 to . 0003".
adequate coolant flow, or if the machine is not equipped with

a coolant arrangement, use any available spray mist attachment.

DO NOT ATTEMPT TO GRIND CHUCK DRY

7.

After the base has been ground, be sure it is free from burrs and

mount on the table in the position it is to be used and clamp to
table.

Clamps should only be tightened sufficiently to prevent

the chuck from moving on the table.

Use an

1

-

■ .

\.

■

1

Put lever in "On" position,

8.
it should be energized.

9.

Retrue wheel - "Open" - and grind top of chuck to "clean up. "

Follow instructions in "6" as to coolant and depth of cut.

Each time the chuck is ground, the wheel should be trued.

should be no effort to "spark out" on the top of the chuck after the last pass

has been taken.

ficient of friction for non-slip magnetic

A

"commercial" grind finish will provide the best coef

or if

the chuck is an electric type,

holding of work pieces on the chuck.

There

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AUTOMATIC PICKER DOWN FEED

19.

The 6" S-3 can be arranged with automatic picker down
feed at each table reversal or, as an optional arrangement, at
each saddle reversal. See drawing in Parts Section.
is located on top of the wheel feed housing just behind the wheel feed
handwheel (6S3-380). To operate, turn knob (6S3-410) to the left.
The adjustment of this knob in or out determines the amount of down
feed at each pick. The increment of picker feed is infinitely adjustable
from zero to . 003" and up to a total picker down feed of . 040" .

At the table reversal - or saddle reversal - oil pressure
to the cylinder housing (6S3-399) forces the rack piston (6S3-391)
to the left turning the overriding clutch (6S3-388) operating on the

shaft (6S3-387) which in turn revolves the handwheel by means of the
pinion gear (6S3-383). The amount of picker feed can be determined
by checking the graduated handwheel as it moves past the pointer

(6S3-395).

original position by the pressure of the spring (6S3-406).

SETTING UP

CAREFULLY bring the wheel down until it barely sparks the workpiece.

Determine the total amount of stock to be removed and move the

adjustable dog (6S3-405) around the graduated handwheel clockwise the

desired amount.
the adjustable dog will trip the latch (6S3-401). This will allow the

mechanism

feed inoperative.

As the oil exhausts, the rack piston is returned to its

Secure the workpiece on the table - or magnetic chuck - and

When the total amount of downfeed has been reached,

contained in housing (6S3-392) to raise making the picker

The mechanism

WHEEL HEAD MOUNTED TRUING DEVICE

This device is mounted above the grinding wheel. It is
manually operated and trues in a straight line only. The diamond
shank (6S3-434) is lowered or raised by turning the nut (6S3-436)
clockwise or counterclockwise respectively. The device is mounted
so that the slide (6S3-443) is parallel with the wheel spindle and,
therefore, dresses the wheel in the proper plane.

When it is necessary to true the wheel, CAREFULLY bring

the diamond down and into light contact with the wheel. (The adjusting

nut is graduated, each graduation being equal to . 0005" downfeed).
The truing operation can be observed by opening the small inspection
door in the wheel guard cover (6S3-415). In truing,

that a minimum

The diamond is moved across the grinding wheel by turning the hand-
wheel (6S3-423).

speed of the diamond traverse across the wheel face.

amount of abrasive be removed to " clean-up" the wheel.

The truing coarseness or fineness will determine the

it is

recommended

I
P
P
P

INDEX OF PARTS

Drawings for 6" S-3
Surface Grinder

21.

P
P
I
P

I

/

P
P

P
P

Page

22

24
24
24
24

26

28

30

31

32

33

Vertical Wheel
Feed

Table Reverse Lever
Table Dogs

Hand Table Traverse

Reverse Lever Detent

Automatic Cross Feed

and Screw 1

Automatic Cross Feed

and Screw 2

Table Cylinder

Table Control
Valve

Wheel Spindle

Antifriction

Hydraulic Pump Parts &

Cross Feed Shuttle Valve

6S3 Catalogue Numbers

Code 100-127

Code 130-162

Code 280-284

Code 165-196

Code 200-213

Code 215-222

Code 230-252

Code 255-260

Code 265-275

P
P

P
P

P

P

34

36

Please specify catalogue Part number and Name together with

the machine Serial number on every inquiry or order.

Wheel Guard Truing Device

Picker Down Feed

Code 415-448

Code 382-411

to

to

6S3-II4
6S3-II5

L

-----

6S3-II6

6S3-II8
6S3-II9

6S3-I20
;
!

6S3-I2I

SE- l-A
SE-3322-A

I

VERTICAL WHEEL FEED

i

1

rand

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V

SE-3321-A
SE-3322-A

Code No.

6S3-100

6S3-101

6S3-102

6S3-103

6S3-104

6S3-105

6S3-106

6S3-107

6S3-108

Code 100-127

Vertical Wheel Feed

Part Name

Down Feed Knob

Code No.

6S3-116

Part Name

Clipper Seal Type
LA Style Hi/

25

Handwheel

Handle

Bushing

Idler Stud

Torrington B Ring

Idler Gear

Sun Gear Housing

Ball Bearing

6S3-117

6S3-118

6S3-119

6S3-120

6S3-121

6S3-122

Ball Bearing
Retainer

Vertical Feed Screw

Feed Screw Shield
Cap

Feed Screw Shield

(upper)

Elevating Nut

Vertical Feed
Nut Bracket

6S3-109

6S3-110

6S3-111

6S3-112

6S 3-113

6S3-114

6S3-115

Handwheel Shaft

Bearing Sleeve

Ball Bearing

Pinion

Wheel Feed Housing

Gear

Ball Bearing

6S3-123

6S3-124

6S3-125

6S3-126

6S3-127

Washer

7/8 x 2i Hex.
cap. scr.

Housing cover

Pointer

Feed Screw Shield

(lower)

CO
GO

to

6S3-I30,

6S3-I48\

!

jStP

i

:

6S3-I60

6S3-I5I

TABLE DOGS

'S3-155

6S3-I58

■6S3-I57

;

6S3-I56

I!

i

i

SE-3J25-A A

SE-3324-AA

A

6S3-I54

HAND TABLE TRAVERSE

A

6S3-284

Reverse Lever Detent

■6S3-283

TABLE REVERSE LEVER

A

A

»J

(\

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L m .

SE-3323-A
SE-3324-A

Code 130-162

Table Reverse Lever

Code No.

6S3-130
6S3-131
6S3-132
6S3-133
6S3-134

6S3-135

6S3-136
6S3-137

6S3-138

6S3-148
6S3-149
6S3-150

6S3-154
6S3-155
6S3-156
6S3-157
6S3-158

Part Name

Collar
Knob (Black)
Knob Stud
Lever (2)
Spring (2)
Spring Pin (short)
Spring Pin (long)
Spring
Hood

Lever (LH)
Dog (LH)
Tee Bolt (LH)

Handwheel

3QA Handle
Bearing Cap
Ball Bearing
Interlock Collar

Table Dogs

Hand Table Traverse

Code No.

6S3-139
6S3-140
6S3-141
6S3-142
6S3-143
6S3-144
6S3-145
6S3-146
6S3-147

6S3-151
6S3-152
6S3-153

6S3-159
6S3-160
6S3-161
6S3-162

Part Name

Shaft
Key

Torrington Needle Bearing
Housing

Torrington Needle Bearing
Lever and Detent Cam
Soc. set Scr.
Link (2)
Pin

Lever (RH)
Dog (RH)
Tee Bolt (RH)

Rack Pinion Shaft
Ball Bearing
Table Rack
Tru-Arc Snap Ring

6S3-280
6S3-281
6S3-282

Pin
Detent
Spring

Block

Reverse Lever Detent

6S3-283
6S3-284

Detent Plunger

Roll

to

6S3-I96

to

<Ji

i

i

Sc-33 26-A

SE-33 27-A

I

AUTOMATIC CROSS FEED 5 SCREW 1

RAND

A

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A

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SE-3326-A

SE-3327-A

Code No.

6S3-165

6S3-166

6S3-167

6S3-168

6S3-169

6S3-170

6S3-171

6S3-172

Part Name

Handwheel

QA. Handle

Cover

Sliding Gear

Feed Screw Sleeve

Bearing Cap

Ball Bearing

Screw

Automatic Cross Feed

and Screw (I)

Code No.

6S3-181

6S3-182

6S3-183

6S3-184

6S3-185

6S3-186

6S3-187

6S3-188

Code 165-196

Part Name

Pin

Stop Screw

Stop Button

Idler Gear

Bushing

Idler Gear Stud

Gear

Oilite Bushing

6S3-173

6S3-174

6S3-175

6S3-176

6S3-177

6S3-178

6S3-179

6S3-180

Feed Screw Key

Ball Bearing

Truarc Snap

Half Nut

Ball

Knob Stud

Reverse Lever Shaft

Shift Lever

6S3-189

6S3-190

6S3-191

6S3-192

6S3-193

6S3-194

6S3-195

6S3-196

Clutch Sleeve

Spring (3)

Torrington Roller (3)

Rack Pinion

Oilite Bushing

Clutch Stud

Cross Slide

Pointer

to

-a

6S3-206

00

6S3-20I

6S3-200

6S3-202.

6S3-203

6S3-I67

J®

6S3-2I3

0

6S3-2I2

6S3-209'

6S3-2II

0

6S3-208

9

0'/

6S3-2IO

\

6S3-20Z.

SE-3328-A
SE-33 29-A

i

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AUTOMATIC CROSS FEED S SCREW 2

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SE-3328-A

SE-3329-A

Code No.

6S3-200

6S3-201

6S3-202

6S3-203

6S3-204

6S3-205

Part Name

Knob

Oilite Bushing

Spring

Locking Segment

Locking Gear

Pinion Shaft

Automatic Cross Feed

and Screw (II)
6" S-3

Code No.

6S3-207

6S3-208

6S3-209

6S3-210

6S3-211

6S3-212

Code 200-213

Part Name

Sleeve Cap

Adjustment Rack

Adjustment Sleeve

Piston

Spring

Spring

6S3-206

Oilite Bushing

6S3-213

Hydraulic Cylinder

co

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.-3330-AE

PISTON ALC

rod

6S3-2T7

COLLAR (2) 6S5-2TIA-'

CIRCUP (2) GS3 27/b'

CYLINDER WEAD(2)6S3-2I8

'O' RING(2)6S5-2I9

OIL SEAL (S)GS3-

BUSH(2l6S3-220/A

TABLE CYLINDER

220'

cap

/

(2) GS3 - 221 ^

OIL SEAL

(2) 6S3-222

(2) S3J 2)6 'O'

RING

0 m

11

11

4

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6S3-238 O Ring

6S3-230 Cap

6S3-231 "o" Rings
6S3-232 "0"Ring-

6S3-233 Spring Pin Guide
6S3-234 Spring Pin
6S3-235 Spring

6S3-236 Lever

6S3-237 Knob

6S3-239 Bod.'y (Upper)

.6S3-240 Sleeve

6S3-24I "cf Ring

6S3-242 Piston

/

/

t

:

SE-3332-A
SE-3333-A

6S3-249 Con-trol Piston

TABLE CONTROL VALVE

6S3-252 Valve Link

RAND

00

I-

1

6S3-255 Spindle

Sheave

6S3-257

6S3-258 Wheel

Spindle

Spindle

6S3-256 Flat

Pu.lly

Belt

______________

____

belt driven

SE-3334-A

SE- 3333-

LL

6S3-260 Wheel Spin die-Integral Motor

MOTOR DRIVEN

A

dflT

WHEEL SPINDLES

(

antifriction bearings

JB '!■

)

RAND

A

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oS3 2£5 tfRNGnOCXf*)

6S3-26J DfTD&CKI U00K(4

1

683-27/ PUMP

•CS3 270PtM3 MOTCP 6*6£

6S3-272 End Cap (2)

6S3-273 "O" Ring (2)

%

9

6S3-274 Piston.

|

£S3-275 Valve. BodLy.

CROSS FEED SHUTTLE

VALVE

SE-3334-A.E

HYDRAUUC PUMP PARTS

FfAND

CO
CO

6S3-437

6S3-436

CO

6S3-439

SE-37I5-A
SE-37/8-A

WHEEL GUARD TRUING DEVICE

6S3-440

6S3-44I

.6S3-442

6S3-444

6S3-445

6S3-446

6S3-447

CHL/RCH/LL

1

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SE-3715-A
SE-3718-A

Job

#5379

Code No.

6S3-415

6S3-416

6S3-417

6S3-418

6S3-419

6S3-420

6S3-421

6S3-422

No. Req1

1

1

1

4

1

1

1

1

d

Part Name

Wheel Guard Cover

Water Guard

Latch (R.H. )

Washer

Base

Dust Guard

Handle Stem

Handle Stem

Wheel Guard Truing Device

Code No.

6S3-432

6S3-433

6S3-434

6S3-435

6S3-436

6S3-437

6S3-438

6S3-439

No. Req'd

1

1

1

1

1

1

1

1

Page 1 of 1
Code 415 - 448

6-21-68

Part Name

Wheel Guard (8" Wheel)

Dowel Pin

Dia. Shank (8 & 10" Wheel)

Hand Pin

Nut

Guard

Clamp

Woodruff Key

6S3-423

6S3-424

6S3-425

6S3-426

6S3-427

6S3-428

6S3-429

6S3-430

6S3-431

1

1

1

1

1

1

1

3

1

Hand Wheel

Shield

Roll Pin

Bushing

Dovetail

Trav. Screw

Latch

Oil Cup

Clamp Pin

6S3-440

6S3-441

6S3-442

6S3-443

6S3-444

6S3-445

6S3-446

6S3-447

6S3-448

1

1

1

1

1

1

1

1

1

Dust Guard Cover

Gib

Stop Screw

Slide

Nut Bushing

Shoe

Set Screw (Rd. Pt. )

Dust Guard

Seal

CO

CD

CO

o>

oi

6S3-4I0

0

6S3-409

%

6S3-408

\6S3~404

N

\

\

o

i
i

6S3-407

6S3-406 '

6S3-387

6S3-386

/

/

6S3-388

\

6S3-389

6S3

s

6S3-403

6S3-402

401

6S3-400

6S3-399

SE-37/2-A

SE-37/7-R

VERTICAL PICKER FEED

i

A

m M M m M

CHURCH/LL

i

1

SE-3712-A

SE- 3717-A

Code No.

6S3-380

6S3-381

6S3-382

6S3-383

6S3-384

6S3-385

6S3-386

6S3-387

6S3-388

No. Req1

Page 1 of 1

Code 380-411

6-20-68

Vertical Picker Feed

Part Name

d

1

1

1

1

1

1

2

1

1

Hand Wheel

Gear

Snap Ring

Gear

Bushing

Needle Bearing

Spacer

Shaft

Gear

Code No.

6S3-396

6S3-397

6S3-398

6S3-399

6S3-400

6S3-401

6S3-402

6S3-403

6S3-404

No. Req1

d

1

1

1

1

1

1

1

1

1

Part Name

Sun Gear Housing

End Cap R. H.

"O" Ring

Cylinder Housing

Eccentric Shaft

Latch

Spring

Latch Stop

Washer

6S3-389

6S3-390

6S3-391

6S3-392

6S3-393

6S3-394

6S3-395

1

1

1

1

6

3

1

Needle Bearing

Pin

Piston Rack

Gear Housing

Springs

Roller

Pointer

6S3-405

6S3-406

6S3-407

6S3-408

6S3-409

6S3-410

6S3-411

1

1

1

1

1

1

1

Dog

Spring

Roll Pin

Adj. Screw

End Cap

Knob

Spring

00

-o