Lodge & Shipley Model A User manual

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For full and complete information on the above, see bulletin entitled (Preparing Lodge a
Shipley Lathes for Action."
CONNECTING ELECTRICAL EQUIPMENT
After conn.ecting main line wires, check the direction of pulley rotation With indicating
arrow on face of pulley and make sure motor is running in proper direction.
LuBRICATEON
Ample and proper lubrication is essential to insure good results and lasting accuracy.
Lubrication of the lathe should start as soon as it has been cleaned and before any of the
mechanisms are operated or any sliding units are moved. A full and complete lubrication chart
will be found on pages 18 and 19. Refer to this frequently and follow the instructions carefully.
It is false economy to use any but the best lubricating oil. We recommend a high-grade
straight mineral oil, rich enough to lubricate the bearings thoroughly) with body enough to last
a reasonable length of time and entirely free of acids and alkali. For operation in temperatures,
like those usually found in the Central portion of the United States, we suggest the follovying
specifications :
For Lathes operated at standard spindle speeds:
Baume Gravity---------------------------------------------------------------------- 24
________________________________430
Fire______________________.____________________________________________________________________495
Viscosity ----------------------------.---___--:------__-.---.----_-_---.-----------------300,, at lOOo F.
For Lathes operated at twice standard spindle speeds:
Baume Gravity---------------------------------------------------------------------- 25
Flash ______________________________________________________________________________________375
Fire__________________________________________________________________________________________425
Viscosity -------------------------------------- ----.ZOO,, at 100o F.
"PS TO INSURE ACCURATE WORK
If difficulty is experienced in maintaining turning) facing and boring operations to within
standard limits, the chances are this is caused by the lathe being out of level. Experience gained
in hundreds of cases on complaints of this nature enables us to make this statement authoritatively.
The first thing to do is to re-level the lathe carefully using a good sensitive machinist,s level.
For work held between centers, it is important.to make sure that the centers line up with
each other. Remember, that if a long piece is turned without steady or follow rest support, the
work itself will spring away from the tool to some extent.
While misalignment may have\been caused due to rough handling in shipment) these cases
are so extremely rare that all- other possibilities should be exhausted before requesting a factory
service call'
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IF THE LATHE CHATTERS, IT MAY BE DUE TO QUITE A FEW CAUSES:
Improper leveling ; correct as above.
one or more leveling screws not resting solidly on steel plates set in foundation.
Work extending too far from chuck; change method of chucking or support outer end in steady
rest.
Too great distance between centers without support ,. use steady rest.
Oil, grease or dirt between bore of chuck or driving fixture and
spindle nose; both spindle nose and taper bore of chuck
should be thoroughly clean and dry.
Nicks in taper bore of chuck or on spindle nose.
Keyway in chuck or driving fixture riding on top of driving key
in spindle nose; file keyway for slight clearance. (Do not
change dimensions of key in spindle nose.)
NOTE: If chuck) face
plate or fixture loosens
on spindle nose during
service, the trouble will
be caused by one of
these three things.
Improperly fitted adapter plate or looseness between adapter and chuck or driving fixture, if
adapter plate type utilized.
End play in spindle. (See instructions for adjusting spindle bearings.)
Improperly adjusted Compound Rest Top Slide and Base Gibs ; adjust carefully. This is frequent
cause of trouble.
Cutting edge of tool below center.
}
Dirt between center and workpiece) center and tailstock spindle bore) center and headstock center
collet, or headstock center collet and headstock spindle bore.
Tool too weak or having too much overhang.
Tool not securely clamped in Tool Post.
If using tool holder with inserted cutter bit) set screw holding cutter bit may not be tight.
Machine may be thrown out of balance by addition of special chucking fixtures or by work of
irregular shape or weight.
Improper selection of cutting speed and feed.
Too weak a foundation, or vibration caused by heavy presses, etc. working adjacent to lathe.
CAUTION: When placing chucks, face plates oI. SPeCial drivers On SPindle nose, thor-
oughly clean taper bore of chuck, face plate or fixture and spindle nose9 Wiping both dry
and clean fro- all oil and grease. Oil oI. gI.ease Prevents drawing, Chucks, face plates or
fixtures? home on spindle nose. When mounting face plates or chucks9.the SPindle Should
be stopped with the key on top, since the key aligns face plate or chuck on spindle nose.
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HE^DSTOCK
Be sure to fill with proper amount
of oil and keep filled to level on oil gauge.
Check oil pump detector window at rear
of headstock to be sure headstock oil pump
is operating. The oil should bc occasion-
ally drained off, the headstock flushed and
cleaned thoroughly with benzine or kero-
sene, and filled again with fresh oil. The
frequency with which this is done depends
on the amount of service given the lathe,
but it should be done at least every six
months.
SPINDLE BEARINGS
F¬g. 1 - Head8tOCk
The spindle bearings arc carefully adjusted before the lathe is shipped from the factory
for the spindle speed range at which the lathe is to be operated, and this adjustment should not
be tampcred with unless absolutely necessary.
When spindle bearings are readjusted) great care should be taken to prevent dropping any
foreign objects into the headstock. Proceed as follows:
Remove the small cot,er on top of the headstock directly above the front
spindle bearings and rotate spindle by hand until the lock screw or screws (depend-
ing on type of locking arrangement used ,for your headstock) holding the adjusting
nut in position, can be loosened. Tighten or loosen the adjusting nut, as the case
may be, until the bearings are free of all end play with the spindle still revolving
smoothly; then) tighten the lock screw or screws and replace cover on headstock.
Avoid adjusting the bearings too tightly' since this will cause excessive heating and
subsequent destruction of bearings. The maximum temperature at top spindle speed
should not exceed 130 to 140 degrees Fahrenheit.
The above method takes up all'radial and end play of the bearings. There is no ad-
justment for the rear spindle bearing' which is a straight roller bearing permitting horizontal
movement of the spindle to compensate for expansion or contraction caused by temperature
changes.
CAUTION: When lathe is arranged for higher than stan.tar(I spimlle spee{ls) care must
be exercise(I when engaging the top speeds in the high range. These should not be imme_
diately engage(I when starting up the lathe. The lathe ghoul(I be run for awhile in one of
the lower speeds to warm up the mechanism gra{lually, giving all elements a chance to
expand proportionally. Otherwise, the spindle bearings will seize on the 8Pindle.
FRICTION CLUTCH WITH BRAKE OR REVERSE
The Friction Clutch and Brake or Reverse is operated by either of two Mechanical Apron
Control Levers on the front of the machine. The one at the headstock end is convenient when
changing speeds, threads or feeds. The one at the carriage and apron, and traveling with these
units) is convenient for the operator)s normal working position.
On lathes equipped with Friction Clutch and Brake (regularly supplied) unless otherwise
ordered) the lathe is started by pulling either lever "Up" as far as it will go, thus engaging the
driving friction. To stop the lathe, push either lever "Down'' as far as it will go, thus engaging
the brake.
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NOTE: When engaging the friction, pull the lever up quickly to avoid unneceggary wear
on the clutch mechanism. In some cases, when a heavy chuck is being used oI. the work.
piece is quite heavy or if extremely high speeds are in use) lhig may not be feasible Since
8Ome time must be allowed for the clutch to pick up the load.
When specially ordered, the lathe can be supplied with Friction Clutch and Reverse (Re-
verse in Pulley) instead of Friction Clutch and Brake. When this is furnished) the upward position
engages the friction clutch, the central position is neutral and the downward position engages the
reverse. On lathes equipped with Reverse in Pulley) the brake mechanism is eliminated since
the reverse mechanism takes its place in the friction clutch housing. The reverse can be used,
however, to stop the spindle by proper manipulation of the Mechanical Control Levers at Head-
stock or Apron.
NOTE: When tlle friction clutch is engaged (control lever in upward position)? the
8Pindle Should turn toward the OI)Orator. Use this as a check to make sure the motor has
been properly connected to main line wires with pulley running in the propel. direCtiOn9
as Shown by indicating arrow On Pulley face.
Don,t forget to fill friction clutch housing with oil. This must be filled separately from
headstock. Keep oil to proper level shown on oil gauge for friction clutch housing. Drain oil
occasionally) flush and clean mechanism with benzine or kerosene and refill, doing this at least
every six months. Friction Adjusting Lo:I;:lrew
ADJUSTING FRICTION CLUTCH
To adjust driving friction, loosen lock screw "Aw in
nut "B", see Figure 2. Raise control lever to highest position,
turn nut to the right until reasonably tight, re-tighten set
screw. Release friction and engage again. If lever slips into
place and becomes locked, adjustment has been properly made.
The brake mechanism and reverse friction are self-
adjusting.
NOTE: If il should be necessaI.y tO remove the
headstock cover or friction pulley9 Care Should I.a
taken that no diI.I, grit Or foreign Objects drop into
the headslock or pulley. Care must also he taken to
have all parts thoroughly clean when asBemhling.
Fig. 2 - Adjusting Frictio'. Clutch
CHANOINO SPINDLE SPEEDS
Spindle spccds are selected with the three speed change levers on the front of the head-
stock, locating these as shown on Spindle Speed Index Plate. Any desired speed can be instantly
selected without having to go through other speeds. To change spindle speeds, DISENGAGE
THE FRICTION AND STOP THE SPINDLE, shift the levers to proper positions and re-
engage friction. If, when changing speeds, the gears do not mesh instantly) engage friction just
enough to revolve gears and slip them into mesh.
When the right hand speed change lever is in the center hole, the spindle is in a neutral
position and can be revolved freely for changing work in chuck, adjusting chuck jaws, etc.
CAUTION: Do not change spindle speeds with spindle revolving any faster than iS re-
quired to mesh gears properly. Doing this will clash gears and nick them. If a click i8
heard in headBtOCk gearing? this iS PrOhahly What happened, a"l this Can I.a corrected
by locating nick and stoning down raised portion on gear tooth.
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i=l"IinIFT,-
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Fig. 3 - Microme.er Ball Seop
MICROMETER BALL STOP
The Micrometer Ball Stop is an exclusive
Lodge & Shipley feature. It greatly simplifies
threading operations by providing an adjustable
depth stop. This device is mounted on the cross
feed screw and, when not in use, in no way affects
the ordinary operation of the screw.
The design of this attachment is extremely
simple and trouble-proof. It consists of a friction
arrangement, which is controlled by a thumb
screw and acts as a stop for the cross feed screw.
The friction can be tightened to form a positive
stop or can be adjusted to form a halting stop,
which can be slipped by increased pressure on the
cross feed screw handle. By an ingenious arrange-
ment of a ball travelling in the straight groove of
the micrometer sleeve and the spiral groove of the
micrometer bush, the tool can be withdrawn from
the work up to three revolutions of the cross feed screw and run in again to the stop) which brings
the tool back to the bottom of the preceding cut without changing the micrometer reading.
When chasing threads by feeding the tool straight into the work, the friction is adjusted
for a halting stop after the tool is set for the first cut and the graduated dial is brought to zero.
For successive cuts, the friction is slipped to advance the tool.
When chasing threads by feeding the tool in on an angle, the friction is tightened to form
a positive stop and the tool is advanced for successive cuts with the compound rest top slide screw.
In either case, appreciable time savings arc effected since no time is lost feeling the way,
because the tool can be quickly returned to the bottom of the last cut by running against the
stop. Each successive'cut can be accurately measured on the cross feed or top slide screw gradu-
ated dial, a valuable provision in precision thread chasing.
The stop works both backward and forward and can be used on internal as well as external
thread chasing. It can also be employed as a positive single diameter stop in turning or boring
operations to duplicate diameters.
CARRIAGE COMPOUND REST AND APRON
These lathes are equipped with automatic lubrication to bed and carriage ways by means
of a pump mounted in the apron. The apron casting is the oil reservoir. It should be filled to
proper level indicated on oil gauge and oil should be added daily as required. The oil is delivered
under forced feed to all surfaces where the carriage takes its bearing on the bed and to the
carriage cross slide ways, where the compound rest base takes its bearing. The same system
delivers oil to all apron bearings. The pump is automatically operated by both hand and power
longitudinal feed and power cross feed mechanisms. In addition, a lever on the front of the
apron is provided for hand operation of the pump.
NOTE: Before moving carriage or cross sli(le when first starting up -achine or after the
lathe has been idle long enough for the oil to drain back into the reservoir9 the Pump
should be operated hy hand to cat.ry Oil tO all bearing Surfaces. When opeI.Sting Carriage
over Short di8tanCeB for Ions periods) the carriage shout(I he moved periodically for a
longer distance tO distribute Oil delivered tO be{I ways over the full bearing Surface Of
the carriage.
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Check the oiling diagram on pages 18 and 19 for complete lubrication of
some manual lubrication is required.
these units as
The shear wipers should have the Neoprene section bearing on the bed, but not the outer
cage. Care should be take.n to see that a 0.0015'' feeler can be inserted between outer cage and
bed way to prevent scoring of bed way. For most efficient use remove shear wipers occasionally
and clean them thoroughly.
Both carriage and compound rest are fitted with adjustable gibs, which should be kept
snug to provide smooth) even movement of all sliding surfaces.
Many of the operating features of the lathe are controlled from the apron. These controls
are within easy reach of the operator in his normal working position.
The carriage has both hand and power longitudinal feeds and the compound rest base has
both hand and power cross feeds. The compound rest top slide has hand traverse only. Hand
traverse of carriage is operated with the handwheel on the front of the apron. Hand cross feed
of the compound rest base is operated with the cross feed screw handle. Hand traverse of the
compound rest top slide is operated by the top slide screw handle.
In the event any play or back lash develops between the cross feed screw and the cross
feed and compensating nut, this can be taken up by loosening screw "r slightly (See Figure 5,
Page No. 9), then tightening screw "r and rc-tightening "r. Play or looseness of the ball bear-
ing end thrusts for the cross feed screw can be corrected by tightening nut "M,,.
The compound rest base is graduated in degrees and the top slide can be swiveled to any
angle within a complete circle, except on lathes equipped with Universal Relieving Attachment
on which the relieving attachment mechanism reduces this range slightly. Four bolts in the swivel
lock the compound rest top slide at.any desired angle.
Both longitudinal and cross power feeds are operated by separate
levers on the front of the apron. To engage frictions) raise lever to
extreme height ; to disengage, push lever down. The surface ¬(a" com-
ing in sharp contact with ((D,? disengages the friction. Toadjust friction,
raise lever to engaged position and loosen screw ({A,, in nut c(B" inside
the lever (See Figure 4). Turn nut ('B" to obtain desired adjustment
and again tighten set screw "A".
Old oil will ((gum up" the frictions. Drain apron oiling system
at least every six months, wash out mechanism with clean benzine or
kerosene and refill with fresh oil.
Fig. 5. Diagram
of Apron Friction
Fig. 4 - Adjusting Apron Friction
An interlock is provided in the apron to prevent engaging longitudinal power feed and
thread chasing mechanism at same time. If difficulty is experienced in engaging power longitu-
dinal feed, check half nut operating lever and make sure it is in completely disengaged position
against stop pin on apron front plate. If half nut lever cannot be engaged, make sure longitu-
dinal feed lever is in neutral position.
LEADSCREW AND FEED ROD CLUTCHES
Levers ((E" and "F" (see Figure No. 8, Page No. 16) are used to engage or disengage the
feed rod and leadscrew from their source of power. Raising lever "E" disengages the feed rod
clutch, lowering it engages the clutch. The same thing applies to lever "F, which controls the
leadscrew clutch. The operator should stop rotation of feed rod, when using the leadscrew, and
vice versa.
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The entire quick change gear unit and end gearing are lubricated by the "One Shot
Pump" mounted on the quick change gear box. This should be used at least several times daily
or oftener if the lathe is given constant service to insure adequate lubrication to all bearings. Full
information for ranges of threads and feeds, setting up machine, etc. will be found on succeeding
Pages.
THREAD INDICATOR
The thread indicator, furnished only on lathes equipped with English leadscrew, is attached
to the right-hand side of the carriage and travels with it. It can be used for picking up all even)
une\,en, one-half or one-quarter English threads. It cannot be used for leads) unless the lead is
convertible to one of the threads per inch mentioned above. The thread or lead must) however)
be obtained through the standard quick change goal-ing Or by means Of Pick-Off gears added tO
the standard g.earin(,a..
For e\,en threads (2, 4) 6, etc.), close the half nuts at any line on the dial. For uneven
threads (3, 5) 7) etc.), close half nuts at any numbered line. For half threads (5I/2) 6/2) ll/2,
etc.)) close half nuts at any one-quarter revolution. For quarter threads (2/4) 23/4) 3/4} etC.))
close the half nuts at any one-half revolution.
The thread indicator gear can be left engaged with the leadscrew at all times, even when
the leadscrew is not Levolying.
TAILSTOCK
On lathes equipped with dead tailstock center, the center can be removed from the spindle
by running the spindle back until the end of the tailstock screw hits the cnd of the center.
Taper turning is possible by setting the tailstock top off center. The base is graduated
for setover each side of center. The tailstock spindle is graduated with a scale in Ilfr,, gradua-
tions for its entire usable length of travel for convenience in drilling operations.
A built-in revolving tailstock center arrangement can be supplied if desired. Instructions for
changeover are supplied with order or on request. Replacement of the anti-friction bearings for the
revolving center arrangement should not be attempted without reference to special instructions
sent with all replacement bearings or obtainable on request.
Lubrication of the tailstock bearing ways on the bed is automatic from a reservoir in the
base, which must be kept filled to proper level indicated on oil level gauge. Refer to oiling
diagram for lubrication of balance of tailstock mechanism.
The tailstock is equipped with shear wipers, which should occasionally be removed and
thoroughly cleaned. The outer cage of the shear wiper should never bear on the bedway. It
should be possible to insert a 0.0015,, feeler between the outer cage and bedway.
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TAPER ATTACHMENT
Fig. 5 - Taper Attachment
The taper attachment is furnished as
an extra and only when ordered. It is a
self-contained unit bolted to the back of
the carriage and traveling with it. How-
ever, all carriages are machined and jig
drilled for application of taper attach-
ment, so this can be ordered at a later
date and installed on a machine already
in service, by the customer, quite easily.
The taper attachment scale is gradu-
ated for both "inches" per foot and ((de-
grees,, of taper, both readings being on
thesamescale and indicated by the same
pointer.
To set the attachment for any desired
taper, loosen nut "A" (See Figure 5),
holding the guide plate to the sliding
shoe, and nuts "B,, and I(Cu at the ends
of the swiveling bar. Set the swiveling
bar to the desired taper as determined
by the scale, using the adjusting screw
c(L" and tighten the nuts mentioned
above. Except, when setting the taper.
these nuts should always be tight, even
when the attachment is not in use.
CAUTION: Make Sure nuts 6CB% and 66C% are loose when using adjusting screw 66L" to
prevent springing swiveling bar.
To engage the taper attachment) loosen clamp screw "K" and tighten nuts ((D" When
taper attachment is not in use) clamp screw "K" must be tight) and nuts "D" must be loose.
Nut "E,, should be tight at all times. If taper attachment is not in regular or frequent service)
the locking arm should be removed from the bed to reduce wear on the bedway. Be sure to have
tool on center line when taper turning.
If the taper attachment is used consistently on one job) it is advisable to shift the sliding bar
occasionally to more equally distribute wear on the swiveling bar.
The compound rest and taper attachment slides should move freely) but there should be no
looseness or play. If chatter or non-uniform taper occurs, this is usually the result of looseness and
can bc corrected by adjusting the compound rest base and top slide gibs, and gibs "F", CCG" and
"H" on the taper attachment slides. Too tight an adjustment of the gibs can cause a binding
action, which, when taper turning) will cause slides to jump instead of moving smoothly and has
been known to cause rather equally divided marks on the workpiece, sometimes incorrectly
attributed to gear marks.
Should any looseness or back-lash develop between the cross feed screw and nuts, this can
be eliminated by loosening screw "I,, and tighteningscrew"J,,} then re-tightening screw (T,. Loose-
ness or play in the cross feed screw end thrust bearings can be taken up by adjusting nut "M,,.
By the addition of a few parts, the taper attachment can be converted to a form-turning
attachment.
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CARRIAGE
Top Slide Screw Handle and Dial
Compound Rest Top Slide
SELECTIVE HEADSTOCK
Center and Center Collet
Key Drive Spindle Nose
Ring Lock Nut
Removable Coyer for Spindle Adjustment
Speed Index Plate
Oil Level Gauge
k __
Speed Change Levers
Pump Operating Detector \X/indow
Friction Driving Pulley
THREAD
AND FEED MECllANIStul
Feed Rod Clutch Lever
Leadscrew Clutch Lever
One-Shot Oil Pump
hread and Feed Change Lever
read and Feed Range Pull Kno
Oil Level Gauge
Tfiread and Feed lnd-ex Plate
.hread and Lead Change Lever
Quick Change Gear Box
Change Gear Quaclrant
Sliding Tumbler Lever
MOTOR DRIVE
Belt Guard
Motor Leg Housing
Motor and Control
Push Button Station
Rear Levelling Screws
Open Door for Front
Levelling screws
APRON
Handwheel
Safety Stop
AdiustableCarriage Length Stop
Length Feed Lever
Oil Level Gauge
Manual Pump Operating Lever
Cross Feed Lever
Half-Nut Lever
Mechanical Apron Control Levers
Round Tool Post
Micrometer Ball
Stop, Cross Feed
Screw Handle and Dial
Compound Rest Swivel
Rest Base
TAILST'OCK
Binder Lever
Oil Leyel Gauge
Locking Bolts
Set-Over Screw
Handwheel
Steady Rest with Individual
Jaw Adjustment
Carriage Traverse Rack
Reverse to Leadscrew Lever
Fig. 6 - Selec.ive Head I,a.he With Reoer8e To IJeadSCreW
diustable
Leadscrew
Feed Rod
Carriage Length Stop
Con+rol Rod
Coolant and Chip Pan
Thread Indicator
Thread Indicator Instruction plate
Rear Levelling Screws
Front Levelling Screws
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Reverse to Leadscrew is considered standard equipment for Tool Room Lathes, but can be
omitted if not desired. It can also be supplied for engine lathes when ordered for same.
It is operated by the (.Reverse to Leadscrew Lever" mounted on the extreme right-hand
side of the apron. This lever actuates the lowest rod mounted on the front of the bed) thus
shifting a double-sided single tooth clutch mechanism mounted in the thread and feed gear train)
controlling the direction of rotation of leadscrew and feed rod.
During thread chasing operations) changing from right-hand to left-hand threads and leads
is accomplished in this manner. During feeding operations, forward or reverse feeds are obtained
the same way.
With the headstock spindle running in the normal forward direction) when the Reverse to
Leadscrew Lever is in the lower position, the carriage moves toward the headstock and the com-
pound rest feeds "IN" to center. The central position is neutral. When the lever is in the upper
position) the carriage travels toward the tailstock and the compound rest feeds CCOUT fI.Om Center.
Since the clutches are single tooth type) register between the lead of the leadscrew and the
workpiece is not lost when the clutch is shifted, as long as the workpiece is being driven directly
by the headstock spindle and the regular spindle gear drive is used to power the leadscrew. This
permits using the reverse to leadscrew feature for regular thread chasing or for cutting special
threads or leads that cannot be picked up with the thread indicator.
The reverse to leadscrew feature cannot be used, however, for threads or leads obtained
when using either the Coarse Threading Attachment or a Spindle Nose Speed Reducer. The use of
either of these two attachments breaks the direct connection between the workpiece and the lead-
screw) necessary for maintaining register through the reverse to leadscrew mechanism. The reverse
to spindle (Reverse in Pulley) is required for this type of thread chasing and the carriage is re-
versed with the half nuts closed by reversing the entire machine.
CAUTION: Reverse to IJeadSCreW Should not be OPerated at SPindle SPeedS higher than
approximately 300 R.P.M.
ADJUSTABLE AUTOMATIC LENGTH STOPS
Two adjustable automatic length stop dogs are provided mounted on the control rod) one
for each direction of carriage travel. They can be set for any desired length of travel.
On lathes equipped with Reverse to Leadscrew, these stops can be used for both feeding
and thread chasing operations. During threading operations, the carriage coming against the
stop dog disengages the single tooth clutch in the thread and feed gear train, stopping the carriage
and shifting the Reverse to Leadscrew Lever into neutral. The clutch is re-engaged by reversing
the carriage travel with the Reverse to Leadscrew Lever. During feeding operations, the Feed
Rod Clutch in the trip box at the head end of the machine is disengaged. This clutch may be
re-engaged by moving the carriage in the opposite direction with the Apron Handwheel. The Feed
Control Lever should be disengaged before moving carriage.
CAUTION: During thread chasing operations9 the Stop dogs Can Only be used When SPindle
is running in normal 66Forward" direction. When spindle is running in 66Reverse" direc-
tion9 the Stop dogs must be loose On the Control rod. The single positive Stop at head
end is also inoperable during thread Chasing OPeI.atiOnS When SPindle ie running in
66Reverse". For feeding operations the stop dogs can be used With head8tOCk SPindle run-
ming in 66Forwardw or 66ReverBe,. directions.
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SELECTIVE HEADSTOCW
)lle1
)Se
lug men
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ut.I '£tl(..&
ife
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Ill-mPqgqBiaseven-''
Center and Center
Key Drive Spindle
Ring Loch Nut
Removable Cover for Spindle
Speed Index Plate
Oil Leyel Gauge
Speed Change Lev
pump Operating Detector
Friction Driving Pull
THREAD
AND FEED tvlECHANISM
Feed Rod Clutch Lever
Leadscrew Clutch Lever
Pull Knob for Right
or Left-Hand Threads
One-Shot Oil Pump
Thread and Feed Change Lever
Thread and Feed Range Pull Knob
Oil Level Gauge
Ttlread and Feed Index Plate
Thread and Lead Change
Quick Change Gear Box
change Gear Quadrant
Sliding Tumbler Lever
MOTOR DRIVE
Belt Guard
tvlotor Leg for Housing
Motor and Control
Push Button Station
Rear Leyelling Screws
Open Door for Front
Levelling Screws
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LATHES NOT EQUIPPED WITH REVERSE TO LE^DSCREW
On lathes not equipped with Reverse to Leadscrew, the direction of feed, both cross and
longitudinal, is controlled by the Feed Reverse Lever mounted on the front of the Apron. This
shifts a double bevel gear arrangement in the Apron.
Right and left-hand threads are chased on lathes, not equipped with Reverse to Lcad-
screw, by controlling the direction of carriage travel with the "Pull Knob For Right or Left-
Hand Threads" mounted at the head cnd of the machine. This shifts a multi-tooth clutch in
the thread and feed gear train, thus controlling the direction of rotation of the leadscrew. When
the headstock spindle is running in the normal "Forward" direction) the "IN" position of the
Pull Knob produces left-hand threads) the "OUT,, position - right-hand threads.
The Pull Knob also controls direction of rotation of the feed rod and will affect the
direction of travd of carriage and cross slide during feeding operations. If the direction of travel
of these units during feeding operations is incorrect for the job being done with any given setting
of the Pull Knob, this can be quickly changed by shifting the Feed Reverse Lever on the front
of the Apron.
ADJUSTABLE AUTOMATIC LENGTH STOPS
Two adjustable automatic length stop dogs are provided mounted on the control rod) one
for each direction of carriage travel. They can be set for any desired length of travel.
On lathes not equipped with Reverse to Leadscrew, these stops can only be used during
feeding operations. They are not operable when thread chasing.
During feeding operations, the carriage coming against the stop dog imparts an end
movement to the control rod, disengaging the Feed Rod Clutch in the trip box at the head end
of the machine and stopping the carriage. This clutch is re-engaged by moving the carriage in
the opposite direction with the Apron Handwhee1. The Feed Control Lever should be disengaged
before the car'riage is moved.
CAUTION: On lathes not equipped with Reverse to Leadscrew9 these Stop dogs CanIIOt
be used during thread chasing operations and must be loose on the control rod. The
single positive Stop at the head end Of the COntrOl rod is also inoperable when thread
chasing.
``.`
Page 13
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These lathes are furnished with English Leadscrew) unless specifically ordered with Metric
Leadscrew. In either case, however) translating gears can be ordered for obtaining the alternate
range of threads or leads, as the case may be, and this translation is accurate. An exceptionally
wide range of threads, leads and feeds is obtained with the standard quick change gearing) but
provision is made for the easy application of special change or pick-off gears to obtain odd ranges
of threads' leads and feeds.
A Coarse Threading Attachment can also be supplied, (it is regularly fumished on all
lathes equipped with Universal Relieving Attachment), which makes it possible to obtain coarse
leads eight times coarser than standard. Figure ll, Page l6 shows a lathe equipped with Coarse
Threading Attachment) which becomes an integral part of the machine for which it is supplied.
The Coarse Thread Drive Gear mounted on center ((Pw gets its power from one of the
back gears inside the hcadstock, which is always revolving eight times faster than the spindle and,
when used to power the leadscrew or feed rod in place of the regular spindle drive gear) speeds
up these units eight times faster than standard with relation to the spindle speed, thus producing
coarse leads and feeds.
Pull Knob "X" is used to disengage the spindle gear drive and engage the coarse thread
drive or vice versa. The "IN" position engages the spindle gear drive, the ((OUT position-
thc coarse thread drive.
A Spindle Nose Speed Reducer (sometimes used in place of a two-speed Motor to obtain
the slower speeds used for relieving work) can also be used for obtaining coarse leads. This reduces
the R.P.M. of the workpiece in relation to the R.P.M. of the leadscrew, thus producing coarse
leads. The standard spindle nose speed reducer has a 4 to 1 ratio producing leads four times
coarser than standard. All coarse lead tables) shown in this manual) show the ranges obtainable
with the Coarse Threading Attachment, not the Spindle Nose Speed Reducer.
CHASING THREADS USING THE THREAD INDICATOR
When chasing threads using the Thread Indicator, the operator sets up the lathe for the
particular thread selected; moves the carriage into position for the start of the cut; runs the tool
into proper depth for the first cut; and engages the Half Nuts at the proper line on the Thread
Indicator Dial for the thread to be chased.
At the end of the first cut, he disengages the Half Nuts; withdraws the tool; runs the car-
riage back to the starting point with the Apron handwheel and repeats the process.
CHASING THREADS USING REVERSE TO LEADSCREW
On lathes equipped with Reverse to Leadscrew) this feature can be used to return the
carriage under power with the Half Nuts closed. The operator pays no attention to the Thread
Indicator; he controls the movement of the carriage with the Reverse to Leadscrew Lever.
CHASING THREADS USING REVERSE IN PULLEY
The mechanical reverse to spindle, obtained with the Reverse in Pulley) reverses the entire
machine and can be used for returning the carriage under power with the Half Nuts closed during
thread chasing operations without reference to the Thread Indicator.
NOTE: The Thread Indicator can be and usually is used for thI.Cad Chasing OPeratiOnS
within its range on lathes equipped with Reverse in Pulley or Reverse to Leadscrew.
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The Thread Indicator is only usable on English Leadscrew Lathes for picking up even,
uneven) one-half or one-quarter English Threads per inch or leads translatable into one of these
threads per inch, when this thread or lead is obtained through the standard quick change Searing
or by means of pick-off gears added to the standard Searing.
Lathes, equipped with English Leadscrew and special gears to get Odd) Metric or Module
Leads or Diametral Pitches, and Metric Leadscrew Lathes) with or without special gearing) must
be equipped with Reverse to Leadscrew or Reverse in Pulley) and this reverse used to return the
carriage under power with the Half Nuts closed.
Lathes, equipped with Coarse Threading Attachment or Spindle Nose Speed Reducer,
must be equipped with Reverse in Pulley) since Reverse to Leadscrew cannot be used for Coarse
Thread Chasing.
Lathes) equipped with Coarse Threading Attachment, must be equipped with a Two-
speed Constant Torque) Single Winding Motor, providing half standard and standard spindle speeds
- the slower range being used for coarse threading work.
One of the six back gear speeds must always be used when the Coarse Threading Attach-
ment is in use) since it is powered from the back gears.
In describing the set-up for obtaining coarse English, Metric and Module Leads and Diametral
Pitches' using.-the ,.Coarse Threading Attachment, reference is always made to the applicable Coarse
Lead I'ndex Plat.e. furnished with the machine and listing the more usable coarse leads. If the
operator.pr6f-ers to calcrilate his coarse leads, he can set up the machine for any of the threads,
leads or ,feeds shown in the standar.d Thread and Feed Index Plate or standard Metric or Module
Lead or Diainetral Pitch Index Plates and with Pull K'nob :(<X" iri outer position a Thread, Lead
or Feed eight times coarser than shown 6n Index plate will be obtained. If a Spindle Nose Speed
Reducer is used for driving the work to obtain coarse leads) the.operator stets up the machine per
the standard or special corresponding index plate and a lead four times coarser than shown on
index plate will be obtained.
Once the machine has been set up for a specific range of threads, leads or feeds, as de-
scribed in the following pages, the full range shown on the index plate for this particular set up,
can then be obtained through the Quick Chang.a Method by positioning Sliding Tumbler Lever
"C,,) Thread and Feed Range Lever a(B" and Pull Knob "A,, without changing pick-off gears.
While no specific reference is made in the following pages on thread chasing ,to selecting
right or left-hand threads or leads, the operator must, naturally) do this. On lathes not
equipped with Reverse to Leadscrew, this is controlled by Pull Knob "G" (See Cut No. 8 and 9),
which controls the direction of rotation of Leadscrew and Feed Rod. On lathes equipped.with
Reverse to Leadscrew, this is controlled by the Reverse to Leadscrew Lever, which controls the
direction of rotation of Leadscrew and Feed Rod.
Figure No. 9 shows the end Searing and Figure No. 8 shows the Levers and Pull Knobs
controlling the Quick Change Gear Mechanism supplied on lathes not equipped with Reverse to
Lcadscrew.
Figure No. ll shows the end Searing and Figure No. lO shows the Levers and Pull Knobs
supplied on lathes equipped with Reverse to Leadscrew. These illustrations, also, show the Coarse
Threading Attachment Gearing and Pull Knob and (in phantom) the end Searing for Universal
Relieving Attachment.
It will be noted that the only difference in the end gearing (discounting the CoarseThread-
ing Attachment and Universal Relieving Attachment) is the addition of Pull Knob "G" in Figure
No. 8 and 9, which is used for obtaining right or left-hand threads or leads on lathes not equipped
with Reverse to Leadscrew. Coarse Threading Attachment and Universal Relieving Attachment
can be supplied for lathes not equipped with Reverse to Leadscrew, in which event the End Gearing
and Head End Views are the same as Figures lO and Il with the addition of Pull Knob "G".
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Fig. 8 - Head End Vica of Lathe Not Equipped Wick Reverse To Lead8CreW
Fig. 10 -.- Head End View of I,ache Equipped With Reverse To Lead8Crow
and Coarse Threading A..achmen.
Fig. 9 - End Gearing for Lathe Nat Equipped With Reverse To IJeadSCrow
Center "L"
Fig. ll - End Gearing for Lathe Equipped With ReveT8e To I.eadscre.a, Coarse
Threading A..achmen. and (in phan.o-) Universal Relicoing A.tact.-en. Gearing
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R^NOES OF THREADS. LEADS AND FEEDS
FOR ENGLISH LEADSCREW LATHES
STANDARD R^NOE
EunIEIEIIE
-IEIEHIEE
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iTTET iEL ii
IEmIEHIIid
Iid
iiiiIIIIDIIDIIH
E
i=
Ill
IIIBmIIIIEL
IuIIHIDIm
EE
EEiiEi
ERE
5'.\; ,
I-
|HIHH
IIDIIIDDIIID
DIII
IDID
TLTi i
EE
IIIEH
II
IEII
IEII
EII
Eii=
IHI=
EIEEi
-#--, +
iiiILIDIIIDIID
ID
ID E
|Hl|H
i=iii
LEDIIII
lidIll
IDIll
IIII
E
IDIu
EE
ulu
EDED
IEIII
Table No. 1
Table No. 1 shows the range of threads) leads and feeds obtainable on a standard Engine
or Tool Room Lathe without supplementary Searing. 50-T gears are mounted on centers ccK'' and
"L'' with a suitable idler gear on center c"''. For chasing Threads per Inch'' or for obtaining
creeds", Lever a(D" must be in "Threads" position and gear "H'' on center (T'. For chasing
((Leads in Inches,, Lever ccDu must be in "Leads,,positionandgear "H" on center "r. If machine
is equipped with Coarse Threading Attachment) Pull Knob ((X" must be ((IN".
NOTE: Lever 66D% cannot be shifted until gear 66H» is removed. Shifting this lever auto-
matically shifts illteI.lock 660% and permits mounting gear 66H% on the propel. Center.
THREADS PER INCH
Example: Required to chase 9 threads per inch. Find 9 on standard Index PIate (Table 1) in
division mat.ked ¢Threads pet. Inch% and move Tu-bler 66C% to position diI.eCtly underneath the COlumn
in which the Thread appears. In the same horizontal column find letter 66C% which denotes position o£
IJeVer 66B%. The Pull Knob 66A99 must be moved to the 66IN% position, as indicated at extreme left of
Index PIate. Lever 6D% must be in 66Threads" position and gear 66H% -ust be on center 6I%.
FEEDS IN THOUSANDTHS PER RPM OF SPINDLE
Example: RequiI.ed, a Feed.0|0,,. Find 10 on Index Plate (Table 1) in division -arked 66Feeds
in Thousandths per. Revolution" and move Tumbler 66C% to position directly beneath the column in
which the Feed appears. In the same horizontal column find letter 66A% and move Lever 6CB% to this
position. Pull Knob C6A" must I.e located in 66OUT" position, as noted at extreme left of Index PIate.
IJeVer CD% must be in 6Threads" position and gear 66H» nlust be on center 6CIM.
LEADS IN INCllIES
Example: Required to cut a 3/l6 inch lead. Final 3/l6 inch on Index Plate (Table I) in divi-
sion marked 66Leads in Inches" and move Tumbler 66Cw to position directly beneath the colu-n in which
the IJead appears. In the same horizontal column find letter 66B" and move Lever 66BW to this position.
The Pull Knob 66A,, must be moved to the 6CIN" position, as indicated at the extreme left of Index Plate.
IJeVer 66D% must be in 66IJeadS" POSitiOn and gear 66H% must be on center 66J%.
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OILING I
FRICTION PULLEY
Remoye Plug. Fill with
I pt. of Oil. Ko®p Filled to
Proper Level on Oil Gauge.
QUICK CHANCE
AND END CEARINGJ
Fill with I/2 Pt. of Oil.
Keep Filled to Proper Lev_el
on Oil Gauge
Sliding Tumbler Lever
Must Be in This Position when
Using One-Shot Pump
HE^DSTOCK
Remoye Cover and Fill with Oil
l2" Lathe-6 Qts.
l4" Lathe-7 Qts.
l6" Lathe-8 Qts.
Keep Filled to Proper Level
on Oil Gauge
Oil Gauge
Oil Daily
(2 Oilers)
Oil Daily
TAILSTOCK
Fill with I/4 Pt. of Oil.
Keep Filled to Proper Level
on Oil Gauge
APRON, BED AND C^RRIACE
CROSS SLIDE
Fill with I/2 Pt. of Oil.
Keep Filled to Proper Leyel
on Oil Gauge
Front View of Standard Lathe
HE^DSTOCK
Remoye Cover and Fill with Oil
l2" Lathe-6 a)ts.
l4" Lathe-7 Qts.
l6" Lathe-8 Qts.
Keep Filled to Proper Leyel
on Oil Gauge
Drain Plug for
Headstock
Rear Vie.a of Standard IJathe
Oil Pump Detector
W;ndow
Oil Daily
(3 Oilers)
FRICTION PULLEY
Remoye Plug and Fill
with I Pt.of Oil
Keep Filled to Proper Loyal
on Oil Gauge
Drain Plug for
Friction Pulley
Oil Daily
Oil Daily
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|AGRAM
O:I Daily
(2 Oilers)
O;I Daily
(On Lathes \X/ith Built-in Revolying
Center, a Zerk Fitting Replaces Front
Oiler and Grease is Used.)
Apply Grease
Oil Daily
On Lathes \X/ithout Taper Attachmentl
Remove Dirt Coverl Locate and Remoye
Oil Daily
(2 Oilers)
;'e|-'s-crew_ in -R-ea-I I S_u-p-p_or1 -Br_act:I io_I (?ilo?I:ilsy)
Cross Feed Screw and Oil Daily.
Top View of Seandard IAIthe
a:I Daily
(2 Oilers)
HE^DSTOCK
Remove Cover and Fill with Oil
l2" Lathe-6 Qts.
I4" Lathe-7 Qts.
l6" Lathe-8 Qts.
Keep Filled to Proper Level
on Oil Gauge
FRICTION PuLLEY
Remove Plug and Fill
with I Pt.of Oil
Keep Filled to Proper Level
on O:I Gauge
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"..-i: - i_-_::. -:i++-i:----i=,i-TL:I-+-i-==-
TableNo. 2
Table No. 2 shows the standard range of Coarse Leads in Inches obtained with the Coarse
Threading Attachment. Pull Knob "X,,) see Figure No. 10 and ll, must be in (<OUT) position.
Pull Knob "A" should be CCIN" for the full range. Lever c(D" must be in "Lead'' position and
gear "H" on center "r.
Example: Required to cut a 21/±'' Lead. Find 21/±'' on Coarse Lead Index Plate (Table 2) and
move Tumbler 66C% directly underneath the column in which the IJead appears. In the same horizontal
column, find letter ¬6Cw and move IJeVer 66BW to this position.
METRIC LEADS
E
!
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IIEDIIEIIEIIEm-II.I
IIIIIEZIIEZIIEEI-]I
EEDIE EmIIII
IIIbIIIIIIb
IDIBIIEIIEEID
IEImIIEEIIE-['-
IIIIIIIIDIIDID
IDIEEIIEZIIIEmIIIIIEI-
IDIIDIEDIIID-:I-
IDIEDIEDIEDID
LEDIIIDIEHIIEIEI
-J=1lIIImIIEIEEEu
LEDIIIBEIDIEEIII
IIIIIIEDEEDEZZI
DIIEED
EE
E
IIEIIEIIDID
HERE
IDIIIDID
IIIIIIIuIEu-
IIII:I.-IIIIEDID lmRE , I,HE
|HIIIHEH
TableNo. 3
Table No. 3 shows the range of Metric Leads and Feeds obtained with Metric Translating
Gears. The gears must be compounded) as shown in Diagram No. 2 on Page 25.
A 56-T gear is mounted on center "K", a 42-T gear on the inner plane of center "M", a
120-T gear on the outer plane of center c(Mw meshing with a 127-T gear on center c(L". Lever
"D» must be in ((Lead" position and gear CCH" on center "J,,. If lathe is equipped with Coarse
Threading Attachment, Pull Knob "X" must be "IN,).
Example: Required to cut a lead of 5 m/m. Find 5 on Table 3 in division marked 66Leads in
M/M% and move Tumbler 66C» to position directly beneath the column in which the Lead appears. In the
same horizontal column? fincl letter 66B% and move Lever 66BM to this position. Move Pull Knob 66A% to
66IN?? position, as indicated at extreme left of Index plate.
A similar sequence of adjustments is followed to obtain Metric Feeds.
COARSE METRIC LEADS
Tat)leNo.4
Table No. 4 shows the standard range of Coarse Metric Leads obtainable with Metric
Translating Gears and Coarse Threading Attachment. The Searing and levers are arranged as
described under (cMetric Leads", except that Pull Knob ¬(A" is ((IN" for the full range. Pull Knob
((X" must be pulled ((OUT.
Examples Required to cut a IJead Of 36 M/M. Find 36 on Coarse Metric IJead Index Plate (Table
4) in division marked 66IJeadS in M/M" and move SIiding Tumbler c6CW to position directly underneath
the column in which the IJead appears. In the same horizontal column) find letter 66B?, and move IJeVer
.6B% to this Position.
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