Reed-Prentice Reed Prentice 14"" Toolroom Lathe Model ""B"" Part 2 Instruction Guides

page

GENERAL

Correct installation, levelling and maintenance are

essential to successful operation and satisfactory

performance. The lathe should rest on a good solid

foundation to get the best results in accuracy and finish

of work. Regardless of how strong a lathe bed may be

made it cannot hold its shape unless it rests on a good

solid foundation.

Each lathe carries a Jerial number stamped on the

front surface of the bed at the tailstock end. This

1

number identifies the machine and serves as a key to the

manufacturer's records.

Levelling is most impirtant. It should be done with

a very sensitive level. Ordinary levels such as those

used by carpenters are not satisfactory.

CLEANING

To prevent rust during shipment the exposed bright

parts of the machine are given a coating of heavy grease

or slushing compound. This may be washed off with kerosene

or naptha or some of the non-inflammable cleaning agents

if preferred. The slushing compound may pick up dirt or

n

grit in trar-sit, so it is adviBable when washing it off

that any exposed oil holes be plugged to prevent dirt or

grit from entering a bearing. The cleaning operation Should

I

be careful and thorough.

Remove cover over rear part of

REED-PRENTICE CORP.

Page 2

croBS slide for oleaning

the

slide.

LEVELLING

Levelling aboard ship should be conducted while in water

sufficiently still to cause no ,ovement, or when the ship is
in dry dock; otherwise a level cannot be employed satisfactorily

due to sea movement affeoting the steadiness of the ship. If
the foregoing is impractioable, the machine should be set as
level as circumstances will permit, care being taken that each
foot of machine 1s properly chocked or wedged to support ita

proportionate load. If the machine fails to bore or turn true,

wedges under the feet should be adjusted until this inaccuracy

is correoted, since an unsatisfactory condition of this nature

is likely due to misalignment. The lathe should be checked

periodically for accuracy and correct alignment.

LUBRICA TION

Use a good, grade of medium machine oil. The headstock
operates in a bath of oil with oil pump and filtration for
main spindle bearings. Automatio oiling of the apron and the
carriage ways is provided by a small oil pump and distributing

system. The apron oil reservoir should also be drained, flushed
out and refilled with a good grade of machine oil at least twice

each year. At this time the filter in the bottom of the pump
should also be replaced.

~

SUDING GEARHEAD

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REED-PRENTICE

WORCESTER,~MA'S ••U.~

DRIVING PULLEY

• 560 RPM.

POSZ.ION

LEVERS

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CORP.

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18 110

22 136

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47
58
73 432

91

13094

Page 3

'II

,

171

212

276
342

536

Sixteen spindle speeds are available, ranging from

to 536

by level's on the outside of the headstock. Proper operation

requires disengagement of the driving clutch before moving the

shifting levers. A clutch operating lever is placed at the

headstock end of the machine so as to be convenient for this

operation. The headstock gears are made of Chrome ~1olybdenum

SAE

on Fellows Gear Finishing Mac~ine and hardened. Engaging

teeth are rounded to permit

readily sliding into mesh.

The gears slide upon multiple

splined shafts mounted on

4150

RPM.

Changes are effected through sliding gears operated

"

electric furnace steel properly heat-treated, shaved

18 RPM

ball bearings. The line

diagram shows the arrangement

of gears and shafts. Positions

of the levers for each speed

are shown on the easy reading

bronze index plate attached

to the headstock cover.

DRIVING CLUTCH

I

An extremely powerful driving clu~h

Page 4

REMOVE THIS COVER

TO

AO..JUST

CLUTCH

is provided. When properly adjusted

it will not slip even under ex•..

tremely heavy cuts. The discs are

of steel faced with

"Ray

There is but one point of adjust-

TO TIGHTEN

ment, easily accessible and con-

LOOSEN SCREW

WITHDRAW LOCK PLATE FROM

NOTCH -

REPLACE

TURN

NUT ONE. NOlCH

PLATE~ TIGHTEN SCREW

sisting of a nut and lock p'Late ,

Adjustment is effected by remov-

ing the lock plate and turning the

.adjus ting nut. Turn to the right to tighten and to the left

to release. Re-engage the lock plate in one of the slots

provided for the purpose.

A

brake is provided for quickly stopping the machine. The

best.o

a'",

clutch and brake are both operated by the clutch levers, one

of which is provided at the quick change gear bank and the

other at the right hand side of the apron. Both levers are

attached to the same operatin~ shaft and operate simultaneously.

SPINDLE

Due to its rugged construction and the ample size bearings

used, the spindle will seldom, if ever, require bearing adjust-

mente All thrust is taken by the two front bearings, which are

adjusted by means of locking collars. Rear

bearings are fitted in a snugly fitting

I..V.

.,...J\

-~

End thrust of

between

spindle

these TIMKEN

taken

"

beaTinqs

floating sleeve, allowing

compensation,for varying

headstock and spindle

5n"91y

fittedFloatlnqsleeve Face

carry,n9 rear bearon3s

front

bearings

deflec.tion

qear close to .-

redu<:ms

lominimum

spindle

temperatures. Adjustment

made by releasing the set

screw and turning the adjusting collar which is threaded

onto the spindle.

The spindle is SAE 6140I,hrome Vanadium alloy steel,

page 5

heat-treated and hardened to

Rockwell C36-40; spindle nose

hardened to Rockwell C55-5S. Care should be taken, when

inserting centers or bushings into the taper spindle bore,

to see that the bore is clean and that the piece to be

inserted is clean and free from burrs.

Spindles may be

ruined by battering of the taper bores due to carelessness.

CHANGE GEAR MECHANISM

The line drawing showing the headstock gearing shows

how power is taken from the e d of the spindle to drive the

feed works. End gears are moun ted on anti-friction bearings

I

with "Alemi t.e " . syst.e m of lubrica tion and the lower gears

run in a bath of oil in an oil tight case provided with a

sight oil level gauge. Changes of feed and setting for

thread cutting occur principally in the quick change box.

An easy reading index pl~te shows the positions of the various

chan§3 levers for the thread or feed selected. This pla te

indicates the settings for feeds from .0025" to

.160

per

revolution of spindle and threads from 1-1/2-96 including

11-1/2.

48 52 5

24 2" 28 32

II! \3 \4 I~ \8

6 G"2 7 8 '3

3

,',zIIe \-l'+ 2 2'

10 3 8
20 \ 8 17 IS 14Yz

THR A 5

Eo 64 72

3Y4. 3Yz

5

4'12:

40 37 34 )0 29

80 74 68 60 58

1,,"0 14 \ 120 1\

4-4Yz

FEEDS IN

4"4 3+4-

1'2

c:.

3~

A '20 22 23 24

3'/2.

114

A

\r--.JC""""",,, ,

80 88 9 Z 9

40 44 46

I' 10"t 10

24 2'Z.

48 44 41 l!: 40

/,7 83

20~4-

~NO

6 I...E.vCf't

4~ \

20

2.

PER..

A reverse leadscrew mechanism operated from carriage

permits cutting left hand threads when desired.

Page 6

Apron is provided with thread

chasing dial to indicate

proper

engagement of leads crew

nut for thread cutting. Full

lines denote even and half lines

odd pitches. Leadscrew Re-

verse Mechanism also furnished.

A

safety interlock prevents

leadscrew nut being engaged

when feed rod is engaged and

vice versa. Feed lever must

be brought to vertical

position to engage leadscrew

nut.

Lubrication of apron and carriage bearings is by means

of a small oil pump immersed in an oil reservoir at the bottom

of the apron. Oil tubes lead from this pump to the various

lubrication centers.

Double disc clutches are used for longitudinal and cross

feeds operated

clutch is made

by

independent levers. Adjustment of the feed

by

releasing a set screw and turning the adjust-

ing collar to the right to tighten and to the left to release.

The feed rod and leads crew are interlocked, making it impossible

to engage one while the other is in use.

A

lever is mounted

on the front of the apron for disengaging feed.

Page 7

TAPER AJTACHMENT

1-

Engagement of the taper attachment is by tightening the

dog which is clamped to the bed and the nut on the sliding

block over the taper bar. Scales at the ends of the taper bar

are provided for quick setting. One scale reads in degrees

I

of included angle and the other reads in inches per foot.

The cross slide and compound rest should be so set that

the cross slide will move freely throughout the length of the

taper to be cut. A telescoping type cross feed screw is

provided, thus avoiding the necessity of disengaging the cross

feed nut when turning tapers.

LEADSCREW AND FEED ROD

Engagement of both fe~d rod and leads crew is prevented

by an interlock. Thus when the feed rod is in engagement the

leads crew is at rest. Likewise, when the leadscrew is engaged

the feed rod is at rest. The screw is mounted in radial ball

bearings and is provided with hardened steel and bronze thrust

washers.

Adjustable dogs are provided on the control shaft under

the feed rod and may be set to disen8s8e the feed rod or lead-

screw at a predetermined point when the carriage is moving in

either direction.

A

fixed collar acts as a saf'e-cyat the limit

page 8

of travel, thus preventing jammlng the feed works by running

up again st the heads tock

0

TAILSTO

OK

The tailstock is of the massive two bolt type and is so

designed as to permi t setting the compound rest parallel wi th

the bed of the lathe. Spindle is carefully fitted and is

provided with an equalizing type of binder.

A

single movement

forward or back, of a convenient lever at the top of the

barrel locks or releases the spindle without affecting align-

ment.

Lateral adjustment is provided for turning tapers by

offsetting the tailstock. When the tailstock is to be offset,

it is of course necessary to release the two clamping bolts so

as to avoid inaccurate setting due to strains.

MOTOR DRIVE

Adjustment of the driving motor to suit the driving

element, whether it

be

chain, flat belt or multiple vee belt

is by movement of a hinged plate upon which the motor is

mounted. This adjustment is through a screw and nut at the

front of the motor plate. In the case of belt drives it is

necessary to avoid getting oil or grease on the belts when

oiling the motor, as oil has a detrimental effect on this

type of drive

0

GENERAL

page 9

Keep the machine clean and well oiled.

Avoid putting

tools or wrenches and files across the bed of the lathe. If

you must keep tools on the bed, a board should be provided

so as to protect the finished surfaces of the vees.

Remember that the manufacturer has built precision

into the machine and that the bed and carriage wings are not

intended for use as anvils anf that such use is detrtmental.

Always use wrenches that are a proper fit on the various

bolts and screws so as to avoid turning over the corners and

finally getting a condition where a pipe wrench is necessary

to get a grip. Suitable wrenfhes provided with machine.

OILING DIAGRAM

1. Combined oil pump and splash lubrication to headstock with
filtration of oil to main spindle bearings.

2. End Works provided with reservoir for gear bath; bearings

lubricated by Alerr.ite system.

3. Quick Change Gear Mechanism provided with reservoir and "one
shot" lubrication system.

4. Apron furnished with oil pump and reservoir providing automatic
lubrication to all bearings, bed ways and carriage cross slide.

S. Oil cups for tall stock spindle, feed rod, leadscrew, etc.

6. All bearings, apron, quick change, end works and headstock

anti-friction type either ball or roller.