Amco GH-1340B User manual

GH-1340B(C6232B2) GH-1440B(C6236B2)
GEARED HEAD PRECISION LATHE
OPERATOR’S MANUAL

1
WARNING!
1. Read and understand the entire instruction manual before operating machine.
2. Always wear approved safety glasses/face shields while using this machine.
3. Make certain the machine is properly grounded.
4. Before operating the machine, remove tie, rings, watches, other jewelry, and roll up sleeves above the elbows.
Remove all loose clothing and confine long hair. Do not wear gloves.
5. Keep the floor around the machine clean and free of scrap material, oil and grease.
6. Keep machine guards in place at all times when the machine is in use. If removed for maintenance purposes,
use extreme caution and replace the guards immediately.
7. Do not over reach. Maintain a balanced stance at all times so that you do not fall or lean against blades or
other moving parts.
8. Make all machine adjustments or maintenance with the machine unplugged from the power source.
9. Use the right tool. Don't force a tool or attachment to do a job which it was not designed for.
10. Replace warning labels if they become obscured or removed.
11. Make certain the motor switch is in the OFF position before connecting the machine to the power supply.
12. Give your work undivided attention. Looking around, carrying on a conversation, and "horse-play" are careless
acts that can result in serious injury.
13. Keep visitors a safe distance from the work area.
14. Use recommended accessories; improper accessories may be hazardous.
15. Make a habit of checking to see that keys and adjusting wrenches are removed before turning on the machine.
16. Never attempt any operation or adjustment if the procedure is not understood.
17. Keep fingers away from revolving parts and cutting tools while in operation.
18. Keep belt guard in place and in working order.
19. Never force the cutting action.
20. Do not attempt to adjust or remove tools during operation.
21. Always keep cutters sharp.
22. Always use identical replacement parts when servicing.
23. Failure to comply with all of these warnings may cause serious injury.

2
Specifications: GH-1340B（C6232B2）
Capacities:
Swing Over Bed...................................................................................................................................13"（330mm）
Swing Over Cross Slide..................................................................................................................7-5/ 8"（195mm）
Swing Over Gap...................................................................................................................................19"（475mm）
Length of Gap.................................................................................................................................9-3/ 8"（238mm）
Distance Between Centers ................................................................................................................40"（1000mm）
Headstock:
Hole through Spindle .........................................................................................................................1-1/2"（38mm）
Spindle Nose.........................................................................................................................................................D1-4
Taper in Spindle Nose.......................................................................................................................................... MT-5
Spindle Bearing Type...................................................................................................................Taper Roller Bearing
Number of Spindle Speeds............................................................................................................................... 8 or 16
Range of Spindle Speeds ........................................................................................................................45-1800 rpm
Gearbox:
Number of Longitudinal and Cross Feeds................................................................................................................40
Range of Longitudinal Feeds...........................................................................0.0012" - 0.0294"（0.043-0.653mm）
Number of Inch Threads............................................................................................................................... 40（28）
Range of Inch Threads ...............................................................................................................................4-112 T.P.I.
Number of Metric Threads............................................................................................................................ 22（37）
Range of Metric Threads ....................................................................................................0.45-7.5 mm（0.4-7mm）
Leadscrew............................................................................................................7/8"×49-1/2" （22mm×1258mm）
Feed Rod Diameter ..............................................................................................................................3/4"（19mm）
Compound and Carriage:
Toolpost Type.....................................................................................................................................................4-Way
Maximum Tool Size...............................................................................................................5/8"x5/8"（16×16mm）
Maximum Compound Slide Travel.....................................................................................................3-1/2"（90mm）
Maximum Cross Slide Travel...........................................................................................................6-1/2"（165mm）
Maximum Carriage Travel..............................................................................................................37-1/2"（950mm）
Tailstock:
Tailstock Spindle Travel ...................................................................................................................4-3/4"（120mm）
Diameter of Tailstock Spindle.........................................................................................................1-25/32"（45mm）
Taper in Tailstock Spindle .................................................................................................................................... MT-3
Miscellaneous:
Steady Rest Capacity ..........................................................................................................1/4"-2-5/8"（6.5-65mm）
Follow Rest Capacity...........................................................................................................1/4"-2-3/4"（6.5-70mm）
Length of Bed...............................................................................................................................54-1/4"（1380mm）
Width of Bed ..........................................................................................................................................8"（203mm）
Height of Bed.......................................................................................................................................11"（280mm）
Overall Dimensions..........................................................................................................71-3/5” L x29” W x48-4/5”H
.................................................................................................................................................1820×740×1240 mm
Main Motor.......................................................................................................................................... 3HP（2.2KW）
Net Weight (approx.)....................................................................................................................1540 lbs.（700Kg）
Shipping Weight (approx.) ...........................................................................................................1810 lbs.（820Kg）

3
Specifications: GH-1440B（C6236B2）
Capacities:
Swing Over Bed...................................................................................................................................14"（356mm）
Swing Over Cross Slide..................................................................................................................8-5/ 8"（220mm）
Swing Over Gap...................................................................................................................................20"（506mm）
Length of Gap.................................................................................................................................9-3/ 8"（238mm）
Distance Between Centers ................................................................................................................40"（1000mm）
Headstock:
Hole through Spindle .........................................................................................................................1-1/2"（38mm）
Spindle Nose.........................................................................................................................................................D1-4
Taper in Spindle Nose.......................................................................................................................................... MT-5
Spindle Bearing Type...................................................................................................................Taper Roller Bearing
Number of Spindle Speeds.........................................................................................................................................8
Range of Spindle Speeds ........................................................................................................................90-1800 rpm
Gearbox:
Number of Longitudinal and Cross Feeds................................................................................................................40
Range of Longitudinal Feeds...........................................................................0.0012" - 0.0294"（0.043-0.653mm）
Number of Inch Threads............................................................................................................................... 40（28）
Range of Inch Threads ...............................................................................................................................4-112 T.P.I.
Number of Metric Threads............................................................................................................................ 22（37）
Range of Metric Threads ....................................................................................................0.45-7.5 mm（0.4-7mm）
Leadscrew............................................................................................................7/8"×49-1/2" （22mm×1258mm）
Feed Rod Diameter ..............................................................................................................................3/4"（19mm）
Compound and Carriage:
Toolpost Type.....................................................................................................................................................4-Way
Maximum Tool Size...............................................................................................................5/8"x5/8"（16×16mm）
Maximum Compound Slide Travel.....................................................................................................3-1/2"（90mm）
Maximum Cross Slide Travel.................................................................................................................7"（180mm）
Maximum Carriage Travel..............................................................................................................37-1/2"（950mm）
Tailstock:
Tailstock Spindle Travel ...................................................................................................................4-3/4"（120mm）
Diameter of Tailstock Spindle.........................................................................................................1-25/32"（45mm）
Taper in Tailstock Spindle .................................................................................................................................... MT-3
Miscellaneous:
Steady Rest Capacity ..........................................................................................................1/4"-2-5/8"（6.5-65mm）
Follow Rest Capacity...........................................................................................................1/4"-2-3/4"（6.5-70mm）
Length of Bed...............................................................................................................................54-1/4"（1380mm）
Width of Bed ..........................................................................................................................................8"（203mm）
Height of Bed.......................................................................................................................................11"（280mm）
Overall Dimensions............................................................................................................71-3/5"L x29” W x48-4/5”H
.................................................................................................................................................1820×740×1240 mm
Main Motor.........................................................................................................................................220V/60HZ/1PH
Net Weight (approx.)....................................................................................................................1650 lbs.（750Kg）
Shipping Weight (approx.) ...........................................................................................................1950 lbs.（880Kg）

4
Table of Contents
Warning.......................................................................................................................................................................1
Specifications.......................................................................................................................................................... 2-3
Table of Contents........................................................................................................................................................4
Uncrating and Clean-Up.............................................................................................................................................5
Chuck Preparation......................................................................................................................................................6
Lubrication .............................................................................................................................................................. 7-8
Electrical Connections ............................................................................................................................................ 8-9
General Description...............................................................................................................................................9-11
Controls................................................................................................................................................................11-13
Break-In Procedure...................................................................................................................................................14
Operation............................................................................................................................................................ 14-16
Adjustments........................................................................................................................................................ 16-20

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△
WARNING
Read and understand the entire contents of this
manual before attempting set-up or operation!
Failure to comply may cause serious injury!
Uncrating and Clean-Up
1. Finish removing the wooden crate from around
the lathe.
2. Unbolt the lathe from the shipping crate bottom.
3. Choose a location for the lathe that is dry, has good
lighting and has enough room to be able to service the
lathe on all four sides.
4. Sling lathe after placing steel rods or pipes（of sufficient
strength）into holes of lathe stand as diagrammed in
Fig.1. Do not lift by spindle.
With adequate lifting equipment, slowly raise
the lathe off the shipping crate bottom. Make
sure lathe is balanced before moving.
5. To avoid twisting the bed, the lathe's location must be
absolutely flat and level. Check for a level condition
using a machinist’s precision level on the bedways both
front to back and side to side. The leveling pads
included in the tool box and the leveling screws in the
lathe base will help you to reach a level condition. The
lathe must be level to be accurate.
6. Clean all rust protected surfaces using a
mild commercial solvent, kerosene or diesel fuel. Do not
use paint thinner, gasoline, or lacquer thinner. These will
damage painted surfaces. Cover all cleaned
surfaces with a light film of 20W machine oil.
7. Remove the end gear cover. Clean all components of
the end gear assembly and coat all gears with a heavy,
non-slinging grease. Replace cover.
Fig. 1
5

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Chuck Preparation (Three Jaw)
△
!WARNING
Read and understand all directions for
chuck preparation!
Failure to comply may cause serious
injury and/or damage to the lathe!
1. Support the chuck while turning three camlocks 1/4
turn counter-clockwise with the chuck key enclosed
in the tool box.
2. Carefully remove the chuck from the spindle and
place on an adequate work surface.
3. Inspect the camlock studs. Make sure they have not
become cracked or broken during transit. Clean all
parts thoroughly with solvent. Also clean the spindle
and camlocks.
4. Cover all chuck jaws and scroll inside the chuck
with #2 lithium tube grease. Cover the spindle, cam
locks, and chuck body with a light film of 20W Oil.
5. Lift the chuck up to the spindle nose and press onto
the spindle. Tighten in place by turning the cam locks
1/4 turn clockwise. The index mark (A, Fig. 2) on the
camlock should be between the two indictor arrows
(B, Fig. 2). If the index mark is not between the two
arrows, remove the chuck and adjust the camlock
studs by either turning out one full turn (if cams will
not engage) or turning in one full turn (if cams turn
beyond indicator marks)
6. Install chuck and tighten in place.
Fig. 2
Fig. 3
6
C
A
D
B

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Lubrication
△
!CAUTION
Lathe must be serviced at all lubrication
points and all reservoirs filled to operating
level before the lathe is put into service!
Failure to comply may cause serious
damage to the lathe!
1. Headstock - Oil must be up to indicator mark in oil
sight glass. (A, Fig. 3) Top off with Shell Turbo T-68
or equivalent. Fill by pulling pulg (B, Fig. 3). To drain,
remove drain plug (A, Fig. 4) with an 8mm hex
wrench. Drain oil completely and refill after the first
three months of operation. Then, change oil in
headstock annually.
2. Gearbox Input Shaft - Remove end gear cover
and oil the gearbox input shaft where it exits the
headstock bracket (B, Fig. 4) with the oil can using
20W machine oil. Oil once daily.
3. Gearbox –Oil must be up to indicator mark in oil
sight glass (C, Fig. 3) Top off with Shell Turbo T-68 or
equivalent. Fill by removing plug (C, Fig. 4) with an
8mm hex wrench. To drain, remove drain plug (D, Fig.
4) with an 8mm hex wrench. Drain oil completely and
refill after the first three months of operation. Then,
change oil in the gearbox annually.
4. Apron - Oil must be up to indicator mark in oil sight
glass (front of apron - A, Fig. 5). Top off with Shell
Turbo T-68 or equivalent. Remove oil cap (B, Fig. 5)
on top of apron to fill. To drain, remove drain plug on
bottom of apron. Drain oil completely and refill after
the first three months of operation. Then, change oil
in the apron annually.
5. Leadscrew Feed Rod -Lubricate ball oiler
(D, Fig. 3) on leadscrew/ feed rod bracket with 20W
machine oil once daily.
6. Cross Slide -Lubricate three oil ports (C, Fig. 5)
with 20W machine oil once daily.
7. Compound Rest –Lubricate one oil port (D, Fig. 5)
with 20W machine oil once daily.
Fig. 4
Fig. 5
7

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8. Carriage - lubricate four oil ports (A, Fig. 6) with
20W machine oil once daily.
9. Tailstock -Lubricate two oil ports (B, Fig. 6) with
20W machine oil once daily.
Coolant Preparation
△
!CAUTION
Follow coolant manufacturer’s
recommendations for use, care, and
disposal.
1. Remove rear access cover on tailstock end. Make sure
coolant tank has not shifted during transport and is
located properly under recovery chute.
2. Pour three gallons of coolant mix into drip pan.
3. After machine has been connected power, turn on
coolant pump and check to see coolant is cycling
properly.
4. Fasten coolant door to stand.
Electrical Connections
△
!WARNING
All electrical connections must be
completed by a qualified electrician!
Failure to comply may cause serious
injury and/or damage to the machinery
and property!
The GH-1440A gear head lathe is rated at 3HP. Confirm
power available at the lathe's location is the same rating
as the lathe.
Make sure the lathe is properly grounded.
Power is connected properly when pulling up on the
forward-reverse lever causes the spindle to rotate
counter-clockwise as viewed from the tailstock. If the
chuck rotates in the clockwise direction, disconnect the
lathe from the power source switch two of three power
Fig. 6
8
A
B

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leads, and connect the lathe to the power source.
General Description
Lathe Bed
The lathe bed (A, Fig. 7) is made of high grade cast iron.
By combining high cheeks with strong cross ribs, a bed
with low vibration and high rigidity is realized. Two
precision ground vee slideways, reinforced by heat
hardening and grinding, are an accurate guide for the
carriage and headstock. The main drive motor is mounts
in the stand below.
Headstock
The headstock (B, Fig. 7) is cast from high grade, low
vibration cast iron. It is bolted to the bed by four screws
with two adjusting screws for alignment. In the head, the
spindle is mounted on two precision taper roller bearings.
The hollow spindle has Morse Taper #5 with a 1-7/16”
bore.
Carriage
The carriage (A, Fig. 8) is made from high quality cast
iron. The sliding parts are smooth ground. The cross-slide
is mounted on the carriage and moves on a dovetailed
slide which can be adjusted for play by means of the gibs.
The top slide (B, Fig. 8). Which is mounted on the cross
slide (C, Fig. 8), can be rotated through 360. The top
slide and the cross slide travel in a dovetail slide and
have adjustable gibs. A four-way tool post is fitted on the
top slide.
Four Way Tool Post
The four way toolposts (D, Fig. 8) is mounted on the top
slide and allows a maximum of four tools to be mounted
simultaneously. Remember to use a minimum of two
clamping screws when installing a cutting tool.
Apron
The apron (E, Fig. 8) is mounted to the carriage. In the
apron a half nut is fitted. The half nut gibs can be
adjusted from the outside. The half nut is engaged by use
Fig. 7
Fig. 8
9
B
A