CHESTER 836 TURRET MILL User manual

836 Milling
Machine
Operation Manual
Chester UK Lt d
Clwyd Close
Hawarden Industrial Par k Hawarden
Chester CH5 3PZ
Tel: [phone]
sales@chesterma ch i n etools.com
www. ch esterma ch i n etools.com

2
Table of Contents Page
Warnings ........................................................................................................................................... 3
Specifications ................................................................................................................................... 4
Installation Layout............................................................................................................................. 5
Shipping Container Contents ........................................................................................................... 6
Unpacking and Clean-Up ................................................................................................................. 6
Raising the Head .............................................................................................................................. 6
Site Preparation ................................................................................................................................ 7
Lifting the Mill.................................................................................................................................... 7
Lubrication ........................................................................................................................................ 8
Electrical Connections ...................................................................................................................... 8
Controls ....................................................................................................................................... 9-10
Changing Speeds ........................................................................................................................... 10
Position of Ram .............................................................................................................................. 10
Adjustments ............................................................................................................................... 10-11
Parts Lists and Breakdowns ...................................................................................................... 12-23

3
▲WARNING
1. Read and understand the entire
instruction manual before attempting
set-up or operation of this 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. Keep hands away from all moving parts
(belts, cutters, gears, etc.).
16. Never operate this machine under the
influence of alcohol or drugs.
17. Read and understand all warnings
posted on the machine.
18. This manual is intended to familiarize
you with the technical aspects of this
milling machine. It is not, nor was it
intended to be, a training manual.
19. This machine is designed and intended
for use by properly trained and
experienced personnel only. If you are
not familiar with the proper safe use of
milling machines, do not use this
machine until proper training and
knowledge has been obtained.
20. Failure to comply with all of these
warnings may cause serious injury.
21. Some dust created by power sanding,
sawing, grinding, drilling and other
construction activities contains
chemicals known to cause cancer, birth
defects or other reproductive harm.
Some examples of these chemicals are:
Lead from lead based paint.
Crystalline silica from bricks and
cement and other masonry
products, and
Arsenic and chromium from
chemically treated lumber.
22. Your risk from those exposures varies,
depending on how often you do this
type of work. To reduce your exposure
to these chemicals: work in a well
ventilated area, and work with
approved safety equipment, such as
those dust masks that are specifically
designed to filter out microscopic
particles.

4
Specifications
Drilling Capacity
13mm
End Milling Capacity
20mm
Face Milling Capacity
75mm
Table Size
200 x 910mm
Cross Travel
240mm
Longitudinal Travel
550mm
Vertical Travel
127mm
Spindle Taper
R8
T-slot Size
16mm
Spindle Speeds
0-2000rpm
Headstock Tilt
±90º
Motor
1.5kW (2hp)
Net Weight
670kg
Dimensions (LxWxH)
1400 x 1300 x 1955mm

5
836 Installation Layout

6
Shipping Container Contents
1. Mill
1. Flat Way Cover (rear)
1. Accordion Way Cover (front)
1. Knee Crank
1. Drawbar
1 Tool Box:
1. Hex Wrench Set (1.5 - 10mm)
1. 17/19mm Combination Wrench
1. #2 Cross Point Screw Driver
1. #2 Flat Blade Screw Driver
1. Oil Can
1. Hand wheel
1. Adjustable Wrench
5. Handles for Handwheels
1. Operator's Manual
Unpacking and Clean-Up
1. Finish removing the sides and top of the
crate.
Leave the mill bolted to the skid until it is
ready to be moved to its final location.
2. Clean all rust protected surfaces with
kerosene or a light solvent. Do not use
gasoline, paint thinner, or lacquer thinner.
These will damage painted surfaces.
3. Cover all machined surfaces with a film of
light machine tool oil to inhibit rust.
4. Remove wood block from below the knee.
Raising the Head
1. Remove handwheel (A, Fig. 1).
2. Loosen four cap nuts (B, Fig.1) ½ turn to
unlock the head. Do not remove these
nuts unless you are prepared to remove
the head.
3. Use a 19mm socket and breaker bar on
adjusting nut (C, Fig. 1) to rotate the head.
Fig.1

7
Site Preparation
CAUTION !
Mill must be supported equally under all four
corners. Failure to comply may cause the
column to twist and put a bind in the
bedways.
The mill must be placed on an even surface
and bolted to the floor. Anchor bolts of
sufficient size and length must be fastened to the floor
according to the footprint of the mill. See
Installation Layout page 4.
Lifting the Mill
Lift the mill with appropriate sized lifting straps.
Follow the diagram in Fig. 2 for the proper position of
the straps under the ram.
FNote the position of the ram, and that the table has been
moved against the column. Tighten ram locking bolts (A,
Fig. 2) before lifting.
Carefully lift the mill. Move into position over the
anchor bolts. Lower the mill onto the anchor
bolts. Check for level, and secure with washers
and anchor bolt nuts.
Check the mill for level with a machinist's
level placed on the table. Mill must be level
back to front and side-to-side. Shim if
necessary, but remembers that the mill must be
supported equally at all four corners. Check for
level before tightening the anchor bolt nuts and
after tightening them. Adjust as necessary.
▲WARNING
Keep people a safe distance away from the
milling machine while it is being moved.
Failure to comply may cause serious injury!
Fig.2

8
Lubrication
CAUTION !
Do not operate the mill before lubricating the
machine fully. Failure to comply may cause
damage to the machine.
Reference Fig. 3 for parts of the mill to lubricate:
A. Spindle Bearings - fill oil cup once daily with
Mobil DTE® Oil Light.
B. Oil Pump - fill reservoir as needed by
removing cap on top of tank and filling with
Mobil Vactra Oil No. 2. Pump oil with
release handle once for every hour of
operation. Way surfaces and leadscrews
are lubricated in this manner.
C. Knee Leadscrew - lubricate with Mobilith®
AW2 once a week.
Electrical Connections
All electrical connections must be made by a
qualified electrician! Failure to comply may
cause serious injury!
Confirm power at the site matches power
requirements of the mill before connecting to the
power source.
The mill must be properly grounded.
Fig.3

9
Controls
A. Belt Cover Lock Knobs (A, Fig. 4)-located
on the right side of the head. Loosen and
remove belt cover to change belt position on
the pulleys.
B. Spindle Brake (B, Fig. 4)-located on left
side of the head. Move in either direction to
stop spindle once power has been turn off.
C. Quill Feed Handle (C, Fig. 4)-located on the
right side of the head. Rotate
counter-clockwise to lower spindle. Return
spring will retract the spindle automatically
once the handle is released.
D. Quill Lock (D, Fig. 5)-located on the right
side of the head. Rotate the handle
clockwise to lock the quill in a desired
position. Rotate the handle
counter-clockwise to release.
E. Micrometer Adjusting Nut (E, Fig.
4)-located on the front of the head. Use for
setting specific spindle depth.
F. Manual Fine Feed (F, Fig. 4)-located on the
left side of the head. Must engage fine
feed (I, Fig. 5) for hand wheel to function.
G. Quill Stop (G, Fig. 4)-located on the front of
the head. Used in conjunction with
micrometer adjusting nut for predetermined
depth.
H. Reversing Switch (H, Fig. 5)-located on the
left side of the head. Switches rotation of
spindle. For 3 Ph motor there is an
additional low and high-speed option.
I. Fine Feed Engagement (I, Fig. 5)-located
Fig.4
Fig.5

10
on the left side of the head. Turn clockwise until tight. This
engages the manual fine feed.
J. Longitudinal Movement (J, Fig. 6)-handles located on
opposite ends of the table. This controls the X-axis.
K. Cross Movement (K, Fig. 6)-handle located directly in front of
the machine. This controls the Y axis.
L. Knee Handle (L, Fig. 6)-this raises the table up and down.
Changing Speeds
1. Unscrew two knobs (A, Fig. 4) and remove belt
cover.
2. Loosen hex nut (A, Fig. 7).
3. Take the tension off the belt by moving handle (B, Fig. 7).
4. Use the RPM chart to place the belt in the
desired position.
5. Place tension on the belt by moving handle.
6. Tighten hex nut.
7. Always replace the belt cover!
Position of Ram
CAUTION!
Care should be taken to lock ram
securely after setting.
Ram can be moved by loosening two
handles (A, Fig. 8), and turning handle (B, Fig. 8)
to desired position.
Note: It is recommended while doing heavy milling work the head
should be left as close to face of turret as possible as maximum
rigidity is then obtained.
Adjustments
1. Knee Gib Adjustment-(#53, page 19) adjust gib screw (#18,
page 19) below wiper on the left side of the knee for proper
travel and excess play.
Note: when adjusting the gibs always start
with the knee. Adjust the saddle second,
and adjust the table last.
Fig.6
Fig.7
Fig.8

11
2. Saddle Gib Adjustment-(#47, page 19)
adjust gib screw (#18, page 19) found on the
right side front of the carriage for proper
travel and excess play.
3. Table Gib Adjustment-(#45, page 17)
adjust gib screw (#18, page 17) found on the
left side of the table toward the front of the
carriage for proper travel and excess play.
4. Ram Ware Plate-(#10, page 19) adjust two
set screws (#19, page 19) found on the side
of the ram for proper travel.
5. Head Alignment-the scales on the ram
adapter and head rotation are guides only.
Close tolerance work will require the use of
a dial indicator to make sure the head is 90º
to the table in the X axis.
6. Longitudinal & Cross feed Adjustment-if
there is excessive backlash in the handle.
a) Loosen hex socket head screw (#27,
page 17).
b) Turn feed screw nut (#26 or 29, page 17)
to remove play.
c) Tighten hex socket head screw.

12
Head Assembly

13
Parts List for 836
Head Assembly
Used with Serial Number 0050104 and Higher
Index Part
No. No. Description Size Qty.
1 .......... JVM836-01 ........................ Castle Nut ........................................................ M12 ........................... 1
2 .......... JVM836-02 ........................ Lock Nut ........................................................... .................................. 1
3 .......... TS-1523041 ....................... Hex Socket Cap Screw .................................... M6x12 ....................... 3
4. ......... JVM836-04 ........................ Cover ............................................................... .................................. 1
5 .......... JVM836-05 ........................ Taper Sleeve ................................................... .................................. 1
6 .......... JVM836-06 ........................ Spring............................................................... .................................. 1
7 .......... JVM836-07 ........................ Transmission Sleeve ....................................... .................................. 1
8 .......... JVM836-08T ...................... Worm Gear (serial # 0040050 and higher) ...... .................................. 1
9 .......... JVM836-09 ........................ Spring Washer ................................................. M4 ............................. 3
10 ........ JVM836-10 ........................ Cross Round Head Screw ............................... M4x16 ....................... 3
14 ........ JVM836-14T ...................... Shaft (serial # 0040050 and higher) ................ .................................. 1
15 ........ JVM836-15 ........................ Key ................................................................... 5x5x20 ...................... 1
16 ........ JVM836-16 ........................ Cross Flat Head Screw .................................... M5x6 ......................... 1
17 ........ JVM836-17 ........................ Whitney Key ..................................................... .................................. 1
18 ........ JVM836-18T ...................... Volume Spring (serial # 0040050 and higher) . .................................. 1
19 ........ JVM836-19 ........................ Spring Bracket ................................................. .................................. 1
21 ........ JVM836-21 ........................ Full Dog Point Set Screw ................................. M8x8 ......................... 1
22 ........ TS-1514021 ....................... Hex Socket Cap Screw .................................... M6x15 ....................... 4
23 ........ JVM836-23 ........................ Transmission Sleeve ....................................... .................................. 1
24 ........ TS-1523031 ....................... Set Screw......................................................... M6x6 ......................... 1
25 ........ JVM836-25 ........................ Round Pin ........................................................ .................................. 1
26 ........ JVM836-26T ...................... Handle Base (serial # 0040050 and higher) .... .................................. 1
............ JVM836-26TA ................... New Handle Assembly (Include: #26,30,31) ... .................................. 1
27 ........ JVM836-27 ........................ Steel Ball .......................................................... Ø6 ............................. 1
28 ........ JVM836-28 ........................ Spring............................................................... .................................. 1
29 ........ TS-1524011 ....................... Set Screw......................................................... M8x8 ......................... 1
30 ........ JVM836-30T ...................... Rocket Rod (serial # 0040050 and higher)...... .................................. 1
31 ........ JVM836-31T ...................... Knob (serial # 0040050 and higher) ................ .................................. 1
32 ........ JVM836-32 ........................ Flat Washer ..................................................... M8 ............................. 1
33 ........ JVM836-33 ........................ Spring Washer ................................................. M8 ............................. 1
34 ........ JVM836-34 ........................ Hex Socket Cap Screw .................................... M8x16 ....................... 1
35 ........ JVM836-35T ...................... Worm (serial # 0040050 and higher) ............... .................................. 1
36 ........ JVM836-36 ........................ Whitney Key ..................................................... 4x4x12 ...................... 1
37 ........ JVM836-37 ........................ Worm Shaft ...................................................... .................................. 1
38 ........ JVM836-38 ........................ Full Dog Point Set Screw ................................. M5x6 ......................... 1
39 ........ TS-1522011 ....................... Set Screw......................................................... M5x6 ......................... 1
40 ........ JVM836-40T ...................... Bushing (serial # 0040050 and higher) ........... .................................. 1
41 ........ JVM836-41 ........................ Spring Pin ........................................................ Ø3x14 ....................... 1
42 ........ JVM836-42T ...................... Worm (serial # 0040050 and higher) ............... .................................. 1
43 ........ JVM836-43T ...................... Shaft (serial # 0040050 and higher) ................ .................................. 1
44 ........ JVM836-44 ........................ Flat Key ............................................................ 4x4x12 ...................... 1
45 ........ JVM836-45T ...................... Bushing (serial # 0040050 and higher) ........... .................................. 1
46 ........ JVM836-46 ........................ Spacer.............................................................. .................................. 1
47 ........ JVM836-47 ........................ C-Retaining Ring ............................................. .................................. 1
48 ........ JVM836-48 ........................ Wheel ............................................................... .................................. 1
52 ........ JVM836-52 ........................ Hand Grip......................................................... .................................. 1
53 ........ TS-1523041 ....................... Set Screw......................................................... M6x10 ....................... 1

14
54 ........ JVM836-54 ........................ Locating Block ................................................. .................................. 1
55 ........ JVM836-55 ........................ Hex Socket Cap Screw .................................... 3/8”-24UNF ............... 1
56 ........ JVM836-56 ........................ Graduated Ring ............................................... .................................. 1
57 ........ JVM836-57 ........................ Graduated Tight Nut ........................................ .................................. 1
58 ........ JVM836-58 ........................ C-Retaining Ring ............................................. .................................. 1
59 ........ JVM836-59 ........................ Screw ............................................................... .................................. 1
60 ........ JVM836-60 ........................ Graduated Scale .............................................. .................................. 1
62 ........ TS-1523041 ....................... Set Screw......................................................... M6x12 ....................... 2
63 ........ JVM836-63 ........................ Tight Collar ...................................................... .................................. 1
64 ........ JVM836-64 ........................ Tight Collar ...................................................... .................................. 1
65 ........ JVM836-65 ........................ Flexible Handle ................................................ .................................. 1
66 ........ JVM836-66 ........................ T-Head Bolt ...................................................... .................................. 4
67 ........ JVM836-67 ........................ Sleeve Pipe ...................................................... .................................. 4
68 ........ JVM836-68 ........................ Castle Nut ........................................................ .................................. 4
69 ........ JVM836-69T ...................... Rack Sleeve (serial # 0040050 to 0050103) ... .................................. 1
............ JVM836-69N...................... Rack Sleeve (serial # 0050104 and higher) .... .................................. 1
69-1..... JVM836-69T-1 ................... C-Clip ............................................................... R62 ........................... 1
70 ........ JVM836-70 ........................ Cone point Set Screw ...................................... M5x5 ......................... 1
71 ........ JVM836-71 ........................ Taper Roller Bearing........................................ 30206 ........................ 1
71-1..... JVM836-71-1 ..................... Taper Roller Bearing........................................ 32008 ........................ 1
72 ........ JVM836-72N...................... Jam Nut (serial # 0050104 and higher) ........... .................................. 2
79 ........ JVM836-79 ........................ Protection Ring ................................................ .................................. 1
80 ........ JVM836-80T ...................... Protection Cover (serial # 0040050 and higher) ................................ 1
81 ........ JVM836-81 ........................ Spindle Shaft ................................................... .................................. 1
82 ........ JVM836-82 ........................ Full Dog Point Set Screw ................................. M5x6 ......................... 1
83 ........ TS-1522011 ....................... Set Screw......................................................... M5x6 ......................... 1
84 ........ JVM836-84 ........................ Stud .................................................................. M12x50 ..................... 3
85 ........ JVM836-85 ........................ Spring Washer ................................................. M12 ........................... 3
86 ........ TS-1540081 ....................... Hex. Nut ........................................................... M12 ........................... 3
87 ........ JVM836-87 ........................ Limit Plate ........................................................ .................................. 1
88 ........ JVM836-88 ........................ Rivet ............................................................... Ø2 ............................. 5
89 ........ JVM836-89T ...................... Stop Block (serial # 0040050 and higher) ....... .................................. 1
90 ........ TS-1523041 ....................... Set Screw......................................................... M6x12 ....................... 1
93 ........ JVM836-93 ........................ Oil Can ............................................................. 1/16”PS ..................... 1
94 ........ JVM836-94T ...................... Head Body (serial # 0040050 and higher) .... .................................. 1
95 ........ JVM836-95 ........................ Cross Round Cap Screw ................................. M5x6 ......................... 2
96 ........ JVM836-96 ........................ Plate ................................................................. .................................. 1
97 ........ JVM836-97 ........................ Cover ............................................................... .................................. 1
102 ...... JVM836-102 ...................... Set Screw......................................................... M5x6 ......................... 1

15
Upper Head Assembly

16
Upper Head Assembly
Index Part
No. No. Description Size Qty.
2 .......... VM-G22-1 .......................... Spacer.............................................................. .................................. 1
3 .......... VM-G22 ............................. Draw Bar .......................................................... .................................. 1
4 .......... VM-M3-1 ............................ Knob (serial # xxxx0049 and lower) ................ .................................. 1
............ VM-M3-1T.......................... Knob (serial # 0040050 and higher) ................ .................................. 1
5 .......... VM-M3-3 ............................ Break Handle (serial # xxxx0049 and lower) ... .................................. 1
............ VM-M3-3T.......................... Break Handle (serial # 0040050 and higher)... .................................. 1
9 .......... VM-M11-1 .......................... Jam Nut............................................................ .................................. 1
10 ........ TS-1514021 ....................... Hex Socket Cap Screw .................................... M6x16 ....................... 6
11 ........ VM-M4 ............................... Fixed Cover (serial # xxxx0049 and lower) ..... .................................. 1
............ VM-M4T ............................. Fixed Cover (serial # 0040050 and higher) ..... .................................. 1
12 ........ VM-M3-5 ............................ Brake Rod (serial # xxxx0049 and lower) ........ .................................. 1
............ VM-M3-5T.......................... Brake Rod (serial # 0040050 and higher) ....... .................................. 1
13 ........ BB-6007ZZ ........................ Ball Bearing ..................................................... 6007ZZ ..................... 1
14 ........ VM-M2 ............................... Brake (serial # xxxx0049 and lower) ............... .................................. 1
............ VM-M2T ............................. Brake (serial # 0040050 and higher) ............... .................................. 1
............ VM-M2TA .......................... Brake Assembly (Include #14,15,48,49) ......... .................................. 1
15 ........ VM-M1 ............................... Screw (serial # xxxx0049 and lower) ............... .................................. 1
............ VM-M1T ............................. Screw (serial # 0040050 and higher) .............. .................................. 1
16 ........ VM-M6 ............................... Brake Disc........................................................ .................................. 1
17 ........ VM-M8 ............................... Pulley ............................................................... .................................. 1
18 ........ VM-M11 ............................. Spindle Shaft ................................................... .................................. 1
19 ........ VM-M7 ............................... Whitney Key ..................................................... 6x6x16 ...................... 1
20 ........ VM-M9 ............................... Whitney Key ..................................................... 6X6X32 ..................... 1
21 ........ BB-6007ZZ ........................ Ball Bearing ..................................................... 6007ZZ ..................... 1
22 ........ VM-M5 ............................... C-Retaining Ring ............................................. Ø62 ........................... 1
23 ........ VM-M25C .......................... Motor (serial # xxxx0049 and lower) ............... (1-1/2HP 1 PH) ......... 1
............ VM-M25C-3Ph ................... Motor (serial # xxxx0049 and lower) ............... (1-1/2HP 3 PH) ......... 1
............ VM-M25 ............................. Motor (from serial # 0040050 to 2110610) ...... (1-1/2HP 1 PH) ......... 1
............ VM-M25-3Ph ..................... Motor (from serial # 0040050 to 2110610) ...... (1-1/2HP 3 PH) ......... 1
............ VM-M25N .......................... Motor (serial # 2120611 and higher) ............... (1-1/2HP 1 PH) ......... 1
............ VM-M25N-3Ph ................... Motor (serial # 2120611 and higher) ............... (1-1/2HP 3 PH) ......... 1
............ VM-M25CS ........................ Centrifugal Switch (Not Shown)....................... .................................. 1
............ VM-M25RC ........................ Running Capacitor (Not Shown) ...................... 20uf/350VAC ............ 1
............ VM-M25SC ........................ Starting Capacitor (Not Shown)
............ 300MFD/250VAC .............. 1
24 ........ VM-M21 ............................. Hex. Head Screw ............................................. M10x25 ..................... 4
25 ........ VM-M25-1 .......................... Flat Key ............................................................ 8x7x36 ...................... 1
26 ........ VM-M19 ............................. Pulley (serial # 2110610 and lower) ................ .................................. 1
............ VM-M19N .......................... Pulley (serial # 2120611 and higher) ............... .................................. 1
27 ........ TS-1524011 ....................... Set Screw......................................................... M8x8 ......................... 1
28 ........ VM-M20 ............................. Motor Cover (serial # xxxx0049 and lower) ..... .................................. 1
............ VM-M20T ........................... Motor Cover (from S/N# 0040050 to 2110610) .................................. 1
............ VM-M20TN ........................ Motor Cover (serial # 2120611 and higher)..... .................................. 1
29 ........ VM-M3 ............................... Rod (serial # xxxx0049 and lower) .................. .................................. 1
............ VM-M3T ............................. Rod (serial # 0040050 and higher) .................. .................................. 1
30 ........ VM-M3-1 ............................ Knob (serial # xxxx0049 and lower) ................ .................................. 1
............ VM-M3-1T.......................... Knob (serial # 0040050 and higher) ................ .................................. 1
31 ........ JVM836-31B ...................... Cross Flat Head Screw .................................... M6x6 ......................... 3
32 ........ VM-M12-2 .......................... Cover ............................................................... .................................. 1
33 ........ VM-M12 ............................. Pulley Housing ................................................. .................................. 1

17
34 ........ VM-M12-1 .......................... Cover ............................................................... .................................. 1
35 ........ VM-DM85 .......................... Plum Knob (serial # 0040049 & lower) ............ .................................. 2
............ JVM836-31B ...................... Cross Flat Screw (serial # 0040050 & higher). M6x6 ......................... 2
36 ........ TS-1540081 ....................... Hex. Nut ........................................................... M12 ........................... 1
37 ........ TS-1550081 ....................... Flat Washer ..................................................... M12 ........................... 1
38 ........ VM-M23-1 .......................... Stud .................................................................. M12x50 ..................... 1
39 ........ TS-1540081 ....................... Hex. Nut ........................................................... M12 ........................... 2
40 ........ TS-1550081 ....................... Flat Washer ..................................................... M12 ........................... 1
41 ........ VM-M23-1 .......................... Stud .................................................................. M12x50 ..................... 1
42 ........ JVM836-42B ...................... Switch Assembly (1Ph) .................................... .................................. 1
............ JVM836-42-3Ph ................ Switch Assembly (3Ph) .................................... .................................. 1
43 ........ JVM836-43B ...................... Hex Socket Cap Screw .................................... M6x12 ....................... 4
44 ........ JVM836-44B ...................... Switch Cord (4C, 1Ph) ..................................... .................................. 1
............ JVM836-44-3Ph ................ Switch Cord (6C, 3Ph) ..................................... .................................. 1
45 ........ VB-A29 .............................. Belt ................................................................... A29 ........................... 1
46 ........ VM-M26-1PH ..................... Spindle Speed Chart........................................ .................................. 1
............ VM-M26-3PH ..................... Spindle Speed Chart........................................ .................................. 1
48 ........ VM-M2-1 ............................ Spring............................................................... .................................. 2
49 ........ VM-M2-2 ............................ Cross Round Cap Screw ................................. .................................. 2
50 ........ JVM836-U50...................... Plastic Electrical Box ....................................... .................................. 1
51 ........ JVM836-U51...................... Cross Round Cap Screw ................................. M5x40L ..................... 2
52 ........ JVM836-N01...................... JET label .......................................................... .................................. 1

18
Leadscrew Assembly

19
Leadscrew Assembly
Index Part
No. No. Description Size Qty.
1 .......... VM-I1 ................................. Castle Nut ........................................................ M12 ........................... 3
2 .......... VM-I2 ................................. Handle.............................................................. .................................. 3
3 .......... VM-I2-1 .............................. Ball Handle ...................................................... .................................. 3
4 .......... VM-I3 ................................. Knurled Nut (serial # xxxx0049 and lower)...... .................................. 3
............ VM-I3T ............................... Knurled Nut (serial # 0040050 and higher) ..... .................................. 3
5 .......... VM-I5 ................................. Dial (serial # xxxx0049 and lower)................... .................................. 3
............ VM-I5T ............................... Dial (serial # 0040050 and higher) .................. .................................. 3
6 .......... VM-I24 ............................... Dial Holder (serial # xxxx0049 and lower) ....... .................................. 2
............ VM-I24T ............................. Dial Holder (serial # 0040050 and higher)....... .................................. 2
............ VM-I24TA .......................... Dial Holder Assembly (Include #4,5,6,30) ....... .................................. 1
7 .......... VM-I6 ................................. Dial Holder (serial # xxxx0049 and lower) ....... .................................. 1
............ VM-I6T ............................... Dial Holder (serial # 0040050 and higher)....... .................................. 1
............ VM-I6TA ............................ Dial Holder Assembly (Include #4,5,7,30) ....... .................................. 1
8 .......... VM-I8 ................................. Bearing Retaining Cover ................................. .................................. 2
9 .......... TS-1515011 ....................... Hex Socket Cap Screw .................................... M8x16 ....................... 6
10 ........ VM-M26 ............................. Limit Plate ........................................................ .................................. 3
11 ........ VM-M26-1 .......................... River ................................................................. .................................. 6
12 ........ BB-6204............................. Ball Bearing ..................................................... 6204 .......................... 5
14 ........ VM-I14 ............................... Bearing Bracket ............................................... .................................. 1
15 ........ VM-I18 ............................... Bearing Bracket ............................................... .................................. 1
16 ........ VM-J11 .............................. Bearing Block ................................................... .................................. 1
17 ........ VM-I13 ............................... Hex. Socket Screw .......................................... M10x16 ..................... 8
18 ........ VM-I12 ............................... Taper Pin ......................................................... Ø8x130 ..................... 6
19 ........ TS-1515021 ....................... Hex Socket Cap Screw .................................... M8x20 ....................... 4
20 ........ JVM836-20B ...................... Flat Screw ........................................................ M6x6 ......................... 2
21 ........ VM-I4 ................................. Whitney Key ..................................................... 3x3x28 ...................... 3
22 ........ VM-J16 .............................. Lead Screw (serial # 2010471 and lower) ....... .................................. 1
22 ........ VM-J16T ............................ Lead Screw (serial # 2020472 and higher) ..... .................................. 1
23 ........ VM-I15 ............................... Lead Screw (serial # 2010471 and lower) ....... .................................. 1
23 ........ VM-I15T ............................. Lead Screw (serial # 2020472 and higher) ..... .................................. 1
24 ........ VM-J28 .............................. Feed Nut Bracket ........................................... .................................. 1
25 ........ VM-J26-1 ........................... Feed Screw Nut (serial # 2010471 and lower) .................................. 1
25 ........ VM-J26-1T ......................... Feed Screw Nut (serial # 2020472 and higher).................................. 1
26 ........ VM-J26 .............................. Feed Screw Nut (serial # 2010471 and lower) .................................. 1
26 ........ VM-J26T ............................ Feed Screw Nut (serial # 2020472 and higher).................................. 1
27 ........ TS-1514021 ....................... Hex. Socket Screw .......................................... M6x16 ..................... 14
28 ........ VM-J25-1 ........................... Feed Screw Nut (serial # 2010471 and lower) .................................. 1
28 ........ VM-J25-1T ......................... Feed Screw Nut (serial # 2020472 and higher).................................. 1
29 ........ VM-J25 .............................. Feed Screw Nut (serial # 2010471 and lower) .................................. 1
29 ........ VM-J25T ............................ Feed Screw Nut (serial # 2020472 and higher).................................. 1
30 ........ JVM836-T30 ...................... Spacer.............................................................. .................................. 3

20
Base Assembly