Sharp 16 Series User manual

HIGH SPEED PRECISION LATHE
OPERATOR’S
& SPARE PARTS
MANUAL
For Models : 1640L, 1660L, 1860L, 1880L
Sharp Industries, Inc.
3501 Challenger Street
Torrance, CA 9050. USA
Tel [phone], Fax [phone]
16" & 18" Series

1
CONTENTS
PREFACE ...................................................................................................................................3
1. SHARPHIGH SPEED PRECISION LATHE
1-1 Machine Assembly........................................................................................................5
2. UNPACKING & MACHINE INSTALLATION
2-1 Unpacking.......................................................................................................................7
2-2 Lifting..............................................................................................................................7
2-3 Basic Foundation...........................................................................................................8
2-4 Cleaning..........................................................................................................................8
2-5 Leveling Adjustment.....................................................................................................8
3. ELECTRICAL CIRCUIT CONTROL
3-1 Electrical Wiring............................................................................................................9
3-2 Electrical Equipment.....................................................................................................9
3-3 Electrical Cautions.........................................................................................................9
4. TESTING & OPERATION
4-1 Operation Symbols........................................................................................................10
4-2 Transmission & Stop of Spindle..................................................................................11
4-3 Spindle Speed Selection ...............................................................................................11
4-4 Intermittent Operation of Spindle................................................................................12
4-5 The Importance and Methods of Spindle Leveling Adjustment..............................13
4-6 Transmission & Stop of Gear Box ..............................................................................14
4-7 Gear Box Operation ......................................................................................................14
4-8 Manual Operation..........................................................................................................14
4-9 Automatic Feeding Operation......................................................................................15
4-10 Automatic Feeding Stop Operation...........................................................................15
4-11 4 Position Automatic Feeding Stop Operation.........................................................15
4-12 Tailstock Operation .....................................................................................................16

2
CONTENTS
5. THREADING
5-1 Leadscrew Drive............................................................................................................17
5-2 Threading........................................................................................................................17
5-3 Thread Dial Indicator....................................................................................................17
5-4 Thread & Feed Chart.....................................................................................................19
5-5 Module & D.P. Thread Chart .......................................................................................22
6. LUBRICATION
6-1 Headstock Lubrication..................................................................................................24
6-2 Gear Box & Apron Lubrication ...................................................................................24
6-3 Lubrication Charts.........................................................................................................24
6-4 Lubrication Locations...................................................................................................25
7. MAINTENANCE & ADJUSTMENT
7-1 Headstock .......................................................................................................................26
7-2 Apron & Saddle .............................................................................................................27
7-3 Gear Box.........................................................................................................................28
7-4 Tailstock Center Line Adjustment...............................................................................28
7-5 Belt Tension Adjustment...............................................................................................29
7-6 Brake Belt Adjustment..................................................................................................29
7-7 Brake & Limit Switch Adjustment..............................................................................30
7-8 Leadscrew Backlash Adjustment.................................................................................30
7-9 Cutting Coolant Pump....................................................................................................30
8. TAPER ATTACHMENT..................................................................................................31

3
PREFACE
Thank you for choosing Sharp as your choice for a high precision lathe. We at
Sharp take pride in the workmanship, durability and precision of our machines.
Read this manual in its entirety in order to get the best possible results from the
machine and prolong its life, and become familiar with its operation, safety features
and recommended maintenance.
The 1 year warranty would be void if the machine was damaged due to improper
use or disregard to any operational instruction contained in this manual.
Some precautions to be taken not listed later in this manual are:
1. Do NOT install the machine in direct sunlight or directly in front of any
cooling system blowers.
2. Use only recommended lubricants.
3. Always keep machine clean.
4. Should the ways become damaged do not move the carriage until they have
been repaired.

4
Read the following instructions before operating the machine.
Only authorized personnel should work on this machine. Untrained personnel
present a hazard to themselves and the machine, and improper operation will
void the warranty.
Check for damaged parts and tools before operating the machine. Any part or
tool that is damaged should be properly repaired or replaced by authorized
personnel. Do not operate the machine if any component does not appear to be
functioning correctly.
Use appropriate eye and ear protection while operating the machine. ANSI-
approved impact safety goggles and OSHA-approved ear protection are
recommended to reduce the risks of sight damage and hearing loss.
The Emergency Stop button is the large, circular red switch located on the
Control Panel. Pressing the Emergency Stop button will instantly stop all motion
of the machine.
The electrical panel should be closed and the key and latches on the electrical
cabinet should be secured at all times except during installation and service. At
those times, only qualified electricians should have access to the panel. When the
main circuit breaker is on, there is high voltage throughout the electrical panel.
Once the machine is installed, the electrical cabinet must be locked and the key
available only to qualified service personnel.
DO NOT modify or alter this equipment in any way. If modifications are
necessary, all such requests must be handled by SHARP INDUSTRIES, INC.
Any unauthorized modification or alteration of any sharp MACHINES could
lead to personal injury and/or mechanical damage and will void your warranty

5
1. SHARPHIGH SPEED PRECISION LATHE
1-1 MachineAssembly

6
ITEM
DESCRIPTION
ITEM
DESCRIPTION
1
Spindle speed shifting lever
20
Carriage clamping lever
2
Spindle speed H/L shifting lever
21
Foundation adjusting bolt
3
Spindle speed shifting selection
lever
22
Spindle operation control rod
4
Forward/Reverse Shifting lever
23
4 position automatic feed stop
selection rod
5
Thread/Feed Selection lever
24
Leadscrew
6
Thread/Feed Shifting lever
25
Auto-feed rod
7
10-step feed selection dial
26
Tailstock set over adjusting Screw
8
Power source switch
(Main switch)
27
Tailstock body
9
Intermittent button
28
Tailstock handwheel
10
Coolant supply button
29
Tailstock body Clamping lever
11
Spindle operation control lever
30
Tailstock spindle locking lever
12
Adjustable trip dog
31
Rack
13
Longitudinal feed hand wheel
32
Compound rest handle
14
Cross slide handle
33
Coolant control valve
15
Trip plunger
34
Compound rest
16
Auto feeding engaged lever
35
Four way tool post
17
Foot brake pedal
36
Tool post clamping lever
18
Half nut engaged lever
37
Thread dial indicator
19
Feed axis selector

7
2. UNPACKING & MACHINE INSTALLATION
2-1 Unpacking
When the machine is arrived, first, check if the wooden case is damaged or not,
secondly, open the case and inspect the machine for any damage or short supply of
parts. If so, please contact our company or insurance company immediately in order
to get the best solution or refund; otherwise our company or the insurance company
will not be in the position to compensate for the damage.
2-2 Lifting
Please refer to figure 2-2 for machine unloading from the truck.
The steps of lifting the lathes are:
1. Clamp the bedways with a special made hanger, which consists of clamp and an
iron chain.
2. Raise the lathe a little bit with crane, then check if the lathe is balanced. If not,
move apron and cross slide back or forth to make the machine is balanced.
3. While the machine arrives at the location, put down the machine slowly to avoid
any inaccuracy of the machine caused by bumps or crash.
4. For adjusting the electrical cabinet, the machine should be located allowing
sufficient area, min. over 600mm from wall at back and tailstock end.
Fig.2-2

8
2-3 Basic Foundation
With the common usage of tungsten
carbide cutting tools nowadays, heavy cutting
and quicker spindle speed are therefore
reinforced. This may cause the vibration easily.
In order to keep the best cutting condition it is
necessary to build a sound & good floor basis.
(Please refer to figure 2-3 for basic structure.)
2-4 Cleaning
The machine is protected with a special anti-rust agent before delivery. Before
operating the machine, clean all parts, especially the slideways, leadscrew, rack and
all bright surfaces with soft brush/cloth soaked with cleaning solvent or kerosene. Do
NOT use gasoline or cellulose solvent to avoid dangers or fire or explosion. After
removing the anti-agent, keep the machine properly lubricated. Then turn the moving
mechanism like tool post, tailstock by hand back & forth within their moving areas.
2-5 LevelingAdjustment
Once the set screw and
concrete are completely dried and
fixed. It is time to adjust the level
of the bedway. A machinist's level
(accuracy 0.02mm/1000mm)
should be placed on the slideways
of bed. Adjust the set screw for
longitudinal direction of bed level.
For transverse direction of bed
level, tight the nuts until the
accuracy is within
0.04mm/1000mm. Then check
again. If the deviation is resulted
from the nuts, it is necessary to make
another adjustment. (See Figure 2-5)
UNIT-mm
Fig.2-3
Fig.2-5

9
3. ELECTRICAL CIRCUIT CONTROL
3-1 Electrical Wiring
The electrical control box can be found by
opening its cover at the back side of bed.
Connect the power source wire with the
connecting points (R.S.T).
The wire between the power source and the
connecting points must be over sectional area
8mm2(5.5 mm2for 460 or 18”series).
The main switch between machine and
power source should be equipped with safety
fuse. Besides, the machine must have a earth
wire.
3-2 Electrical Equipment
1. The electrical control box is also equipped with overload circuit breaker and
electric magnetic contactor to protect motor from burning out by overload.
2. The main switch is connected with a micro switch.
3. The foot brake is connected with micro switch. Stepping the footbrake is quicker
to stop the lathe than turning off the switch. The spindle can only revolute again
by re-operating the spindle operation control lever using the foot brake.
4. The spindle will rotate continuously as long as the intermittent switch on the top
of the electrical panel is pressed.
3-3 Electrical Cautions
After wiring, check the rotation of the spindle. Turn the main switch “ON”and
make sure the safety of spindle. Then push intermittent button ○
Tmomentarily. The
correction direction of the spindle rotation is counter clockwise. (looking from
tailstock for a downward movement of the spindle operation control lever.) Wrong
direction of rotation can be rectified by interchanging any two of the three phase lines
(R.S.T.) in the power source.
Fig.3-1

10
4. TESTING & OPERATION
4-1 Operation Symbols
1
HIGH
High speed
revolution
11
Variable adjustment (pressure)
Clockwise:
pressure increase
Counterclockwise:
pressure decrease
2
LOW
Low speed
revolution
12
Electrical
control box
3
Forward
revolution
13
Imperial threads
4
N
Neutral gear
14
mm
Metric threads
5
Reverse
revolution
15
mm
Auto feeding
Rate per
revolution
6
Feeding
16
Pump
7
T
Intermittent
button
17
GREEN
Power switch-ON
8
Cross feeding
18
Power switch-OFF
9
Longitudinal
feeding
19
OIL
Oil inlet (hole)
10
Cone clutch
RED
GREEN

11
4-2 Transmission & Stop of Spindle
After the procedure described previously in this manual have been done, it is time
to test the machine.
Position the spindle H/L shifting lever ○
2to “L”, the spindle speed shifting
selection lever ○
3to the very left side, and forward/reverse shifting lever ○ 4to “N”
position. Lift the spindle operation control lever (○
11 of item 1-1), the spindle will
rotate forward, press down the lever, the spindle will rotate reverse; in ‘Neutral’
position, the spindle will stop. For normal forward & reverse revolution, always
operate the spindle operation control lever. For emergency stop, step on the foot brake,
the spindle operation control lever should push back to ‘Neutral’position after
stepping the foot brake. Afterward, start the spindle.
Turn the coolant supply button (○
10 of item 1-1). Adjust the adjusting valve for
the required coolant flow.
Fig.4-2
4-3 Spindle Speed Selection
Spindle speed shift is made up of three speed shifting levers:
1. Spindle speed shifting lever
2. Spindle speed H/L shifting lever
3. Spindle speed shifting selection lever for total of 12 spindle speed numbers
Put the spindle speed H/L shifting lever to ‘neutral’gear between ‘H’and ‘L’
rotate the spindle by hand.
For safety and protecting the gears from damage, only change speeds when the motor
is completely stopped. If the gears are not easily engaged, press intermittent button
and handle the speed shifting levers to change the speeds.
○
3
○
1
○
2
○
4

12
Caution: Do not shift gears while spindle is turning. Be certain gears are properly
engaged before starting.
4-4 Intermittent (Inching) Operation of Spindle
For the convenience spindle speed shifting, feeding rate recognition and work
piece center line and adjustment, press the intermittent button ○
9located on the
right side of the gear box, and the spindle will rotate forward. The spindle will
rotate as long as the intermittent switch is pressed. The intermittent switch cannot
rotate reverse.
○
9
Fig.4-4

13
4-5 The Importance and Methods of Spindle LevelingAdjustment
1. A lathe without proper leveling adjustment is likely to chatter. As a
consequence, this will influence the cutting accuracy of work piece and result in
poor roundness accuracy and finish. It is necessary to pay attention to the spindle
leveling from time to time in order to have the best cutting condition of the lathe.
Belt, 3-jaw chuck and the accumulative tolerances of parts on headstock, all such
factors, can make the lathe chatter. To get rid of those problems, our lathe is
especially designed to be equipped with leveling blocks mounted on the locking
nut at the rear side of the spindle. The leveling blocks can be properly adjusted
according to different condition. Please refer to following description & figure for
proper adjustment.
2. First, set up the spindle speed at 1350 rpm. Put the palm on left hand of the
headstock cover and press the switch by left hand. Then switch on the lathe to
make the spindle turn. Move the leveling block “A & C”left or right by hand
feeling until obtain the best leveling position. Then also move the leveling block
“B”left or right till the best position with same way. Adjust repeatedly till your
hand feels no chattering. Afterwards, change the spindle speed to 2000rpm or
880rpm and check the leveling in the same way as we did at 1350rpm. Finally,
for the leveling block set screw a, a’, b.b. c.c. securely.

14
4-6 Transmission & Stop of Gear Box
Open the end cover to find the gear train transmitting from headstock box,
position the forward/reverse shifting lever (○
4of item 1-1) to right side, the spindle
will rotate forward; to right; reverse; to Neutral, stop. Do not change the gears while
turning.
4-7 Gear Box Operation
1. Threading:
With the special design, there is no need to re-arrange the back gears for
threading. Please refer to the ‘threading & feeding table’and handle the
thread/feed selection lever (○
5of item 1-1), thread, feed shifting lever (○ 6of
item 1-1) and 10-step feed selection dial (○
7of item 1-1) accordingly.
2. Auto feeding:
Also select the appropriate auto feeding rate by positioning the thread, feed
selection lever (○
5of item 1-1), thread, feed shifting lever (○ 6of item 1-1) and
10-step feed selection dial (○
7of item 1-1) as indicated on the ‘threading and
feeding table’.
4-8 Manual Operation
First, position both the halt nut engage lever ○
18 , and forward and reverse shifting
lever (○
4of item 1-1) to ‘N’position to operate the apron handwheel ○ 13 cross slide
handle ○
14 , and compound rest handle ○ 32 easily.
It feeds 17mm per revolution of apron handwheel. The dials on cross slide and
compound rest is graduated 0.02mm per calibration, and feeds 4mm per revolution.
The tool post can be rotated clockwise after loosing the tool post clamping lever
(○
36 of item 1-1). Then position and tighten the clamping lever. For fixing the apron,
just handle the saddle clamping lever ○
20 . For cross slide and compound rest, screw
tightly the set screws beside the taper pin.
○
32
○
20
○
14
○
18
○
13
Fig.4-8

15
4-9Automatic Feeding Operation
1. Position the thread/reverse shifting lever (○
4of item 1-1) for obtaining the
required feeding position.
2. Shift the thread, feed selection lever (○
5of item 1-1), thread, feed selection lever
(○
6of item 1-1), 10-step feed selection lever to select the appropriate feeding
rate.
3. For threading, push the half nut engaged lever (○
18 of item 1-1) downward till
fully engaged.
4. For cross feeding, push the feed axis selector (○
19 of item 1-1) downward till fully
engaged.
5. For longitudinal feeding, pull the feed axis selector.
4-10Automatic Feeding Stop Operation
The apron is equipped with automatic stop device. Tighten the screw on the top
of the adjustable trip dog ○
12 , and then fix it to the required position. Be careful that
the top tip of the adjustable trip dog can be set onto the required position for forward
and backward feeding. To avoid danger or damage to work piece, always have a test
before starting.
4-11 4-position Automatic Feeding Stop Operation
To process certain length or step type of work piece, can use the 4-position
Automatic feeding stop for length set cutting.
1. Rotate the adjustable trip dog (○
12 of item 1-1) to the required setting position and
make the top tip of the adjustable trip dog face outward. Try to test the auto
feeding and adjust the front and back position of the adjustable trip dog if
required, in order to ascertain the position setting accuracy.
2. Secondly, operate the 4-position automatic feed stop selection lever to the
according to second adjustable trip dog by hand and fix the adjustable trip dog
according to above procedure.
3. Same procedure for the third and fourth adjustable trip dog.
4. While the apron is auto-feeding, only the top tip of adjustable trip dog, which
faces outward can touch the trip plunger (○
15 of item 1-1). After stopping the auto
feeding of apron, the other three adjustable trip dog can pass freely without any
function.
Fig.4-10
○
12

16
4-12 Tailstock Operation
1. The tailstock handwheel dial is divided in 0.002mm per graduation. The tailstock
moves forward 5mm per clockwise revolution of handwheel.When revoluting
clockwise, the quill will retract and, to the last, the center will release
automatically.
2. Push the tailstock quill locking lever ○
30 forward to fix the tailstock quill. For
fixing the tailstock onto the bedway, push tailstock body clamping lever ○
29
forward.
3. Adjust the centerline of the tailstock by loosing the tailstock set-over adjusting
screw ○
26 on the side firstly, then adjust the screw on the other side. After
adjustment, tighten the screw on both sides.
Fig.4-12
○
29
○
28
○
30
○
26

17
5. THREADING
5-1 Leadscrew Drive.
Move the forward/reverse lever (○
4of item 1-1) to the right will cause the
leadscrew to rotate backwards, moving the lever to the left the leadscrew will
rotate forward and when lever is in neutral the leadscrew will stop.
5-2 Threading
1. After selecting the thread to be cut, set the following levers to the
appropriate position: ○
5, ○ 6& ○ 7of item 1-1. (Example 18 t.p.i. PAE2)
2. Turn of the lathe.
3. Engage the half nut by pushing ○
18 of item 1-1 down, making sure it is fully
engaged.
5-3 Thread Dial Indicator
1. Thread dial indicator for Imperial leadscrew
To cut even number threads the leadscrew can be engaged on any number
of line. For odd number threads the leadscrew can be engaged on any
number. Fractional threads (1/2, 1/4 etc.), leadscrew can only be engaged on
the same number or line.
Note: When cutting metric threads on a lathe with an Imperial leadscrew, be
sure the half nut is engaged at all times. (If not, the thread will not repeat).

18
2. Thread dial indicator for Metric leadscrew cutting metric threads.
There are two dials, 2&7 division and 3&5 division for Metric leadscrew
while using Metric thread dial indicator. Use 3&5 division dial for cutting
pitches 1.25, 2.5, 5.0, 2.25, 4.5; for the rest threads use 2&7 division dial.
Example 1 : For cutting pitches 0.5, 0.75, 1.0, 1.5, 2.0, 3.0, 4.0, 6.0, use the
14T worm gear and the 2&7 division dial. The dial numbers at which the
leadscrew nuts may be engaged are 7, that is, every division can be engaged
by leadscrew nuts.
Example 2 : For cutting pitches 1.75, 3.5, 7.0 also use the same 14T worm
gear and the 2&7 division dial. But the dial numbers at which the leadscrew
nuts may be engaged on 2; number 1 and 2.
Gear teeth
Pitch
Dial division
Half nuts engaged number
11T
2.75
5.5
2
1
13T
3.25
6.5
2
1
14T
1.75
3.5
2
1,2
7
0.5
0.75
7
1,2,3,4,5,6,7
1
1.5
2
3
4
6
15T
1.25
2.5
3
1,2,3
5
2.25
4.5
5
1,2,3
18T
6.75
2
1,2

19
5-4 Thread & Feed Chart
For Swing 16”, 18”(410mm, 460mm) Series while Metric Leadscrew & Metric
Feed.