Promac JDG-0332 User manual

EN Operating Instructions (Original)
1.0 About this Manual
This manual is provided by PROMAC, covering the safe operation and maintenance procedures for a PROMAC Model JDG-0332
Drill Grinder. This manual contains instructions on safety precautions, general operating procedures, maintenance instructions
and parts breakdown. The machine has been designed and constructed to provide consistent, long-term operation if used in
accordance with the instructions as set forth in this document.
Retain this manual for future reference. If the machine transfers ownership, the manual should accompany it.
2.0 Table of Contents
Section Page
1.0 About this manual .......................................................................................................................................1
2.0 Table of contents.........................................................................................................................................1
3.0 Important safety instructions ..................................................................................................................2~3
4.0 Specifications ..............................................................................................................................................4
5.0 Machine description....................................................................................................................................5
6.0 Operations ..............................................................................................................................................6~7
7.0 Clean and maintenance ...............................................................................................................................7
8.0 Replacing the wheel ....................................................................................................................................7
9.0 Replacement parts ................................................................................................................................8~19
10.0 Wiring diagrams ........................................................................................................................................20

3.0 IMPORTANT SAFETY
INSTRUCTIONS
READ ALL INSTRUCTIONS BEFORE USING THIS GRINDER.
–To reduce risk of injury:
1. Read and understand entire owner’s manual before
attempting assembly or operation of this machine.
2. Read and understand the warnings posted on the machine
and in this manual.
3. Replace warning labels if they become obscured or
removed.
4. This machine is designed and intended for use by properly
trained and experienced personnel only. If you are not
familiar with the proper and safe operation of a metal
lathe, do not use until proper training and knowledge have
been obtained.
5. Do not use this machine for other than its intended use. If
used for other purposes, PROMAC disclaims any real or
implied warranty and holds itself harmless from any injury
that may result from that use.
6. Always wear approved safety glasses or face shield while
using this machine. (Everyday eyeglasses only have impact
resistant lenses; they are not safety glasses.)
7. Before operating this machine, remove tie, rings, watches
and other jewellery, and roll sleeves up past the elbows.
Remove loose clothing and confine long hair. Non-slip
footwear or anti-skid floor strips are recommended.Do not
wear gloves.
8. Wear hearing protection (plugs or muffs) during extended
periods of operation.
9. Some dust created by sawing may contain 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, cement and other
masonry products.
Arsenic and chromium from chemically treated
lumber.
Your risk of exposure 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 face or dust masks
that are specifically designed to filter out microscopic
particles.
10. Do not operate this machine while tired or under the
influence of drugs, alcohol or any medication.
11. Make certain the switch is in the OFF position before
connecting the machine to the power supply. Turn off all
controls before unplugging.
12. Make certain the machine is properly grounded. Connect
to a properly grounded outlet only. See Grounding
instructions.
13. Make all machine adjustments or maintenance with the
machine unplugged from the power source.
14. Remove adjusting keys and wrenches. Form a habit of
checking to see that keys and adjusting wrenches are
removed from the machine before turning it on.
15. Keep safety 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 after
maintenance is complete.
16. Check damaged parts. Before further use of the machine, a
guard or other part that is damaged should be carefully
checked to determine that it will operate properly and
perform its intended function. Check for alignment of
moving parts, binding of moving parts, breakage of parts,
mounting and any other conditions that may affect its
operation. A guard or other part that is damaged should be
properly repaired or replaced.
17. Provide for adequate space surrounding work area and
non-glare, overhead lighting.
18. Keep the floor around the machine clean and free of scrap
material, oil and grease.
19. Keep visitors a safe distance from the work area. Keep
children away.
20. Make your workshop child proof with padlocks, master
switches or by removing starter keys.
21. Give your work undivided attention. Looking around,
carrying on a conversation and “horse-play” are careless
acts that can result in serious injury.
22. Keep an ergonomic body position. Maintain a balanced
stance at all times so that you do not fall or lean against the
moving parts. Do not overreach or use excessive force to
perform any machine operation.
23. Do not force a tool or attachment to do a job for which it
was not designed. The right tool will do the job better and
safer.
24. The machine is intended for indoor use. To reduce the risk
of electric shock, do not use outdoors or on wet surfaces.
25. Do not handle plug or machine with wet hands.
26. Use recommended accessories; improper accessories may
be hazardous.
27. Maintain tools with care. Keep tools sharp and clean for the
best and safest performance. Follow instructions for
lubricating and changing accessories.
28. Turn off machine and disconnect from power before
cleaning.
29. Never leave the machine running unattended. Turn the
power off and do not leave the machine until it comes to a
complete stop.
30. Remove loose items and unnecessary work pieces from the
area before starting the machine.
31. Pull the mains plug if the machine is not in use.
32. Make sure the workpiece is securely clamped.

3
Familiarize yourself with the following safety notices used in this manual:
WARNING: This means that if precautions are not heeded, it may result in serious, or possibly even fatal, injury.
CAUTION: This means that if precautions are not heeded, it may result in minor injury and/or possible machine
damage.
SAVE THESE INSTRUCTIONS
WARNING:
These symbols below advise that you follow the correct safety procedures when using this machine.
Read and understand the entire user
manual before attempting assembly or
machine operation.
Always wear approved working outfit
Wear safety goggles.
Wear ear protection.
Always wear the approved working outfit
Wear safety shoes.
Remove tie, rings, watches, jewellery.
Roll up sleeves above elbows.
Remove all loose clothing and confine
long hair
Make all machine adjustments or
maintenance with the machine unplugged
from the power source.
Do not operate this machine under the
influence of drugs, alcohol or medication
Do not wear gloves while operating this
machine
Connection and repair work on the
electrical installation may be carried out
by a qualified electrician only.
Never reach into the machine while it is
operating or running down.

4
4.0 Specifications
Model number .................................................................................................................................................................................... JDG-0332
Stock number……………………………………………………………………............................................................................................................. JDG-0332
Motor and electricals:
Motor type……………………………………………………..............................................................................................................................DC-motor
Motor power......................................................................................................................................................................................0.25 kW
Motor speed................................................................................................................................................................................... 4,400 rpm
Power supply...................................................................................................................................................................... 1~230V, PE, 50Hz
Grinding wheels:
CBN diamond grinding wheel............................................................................................................................................................. for HSS
SDC diamond grinding wheel (optional) ......................................................................................................................................for Carbide
Collets:
ER20.............................................................................................................................................................................. 11 collets, Ø3 to Ø13
Optional ER20 ............................................................................................................................................ 4 collets, Ø2.5, Ø3.5, Ø4.5, Ø5.5
ER40............................................................................................................................................................................ 13 collets, Ø14 to Ø26
Optional ER40 ...............................................................................................................................6 collets, Ø27, Ø28, Ø29, Ø30, Ø31, Ø32
Optional collet holder.......................................................................................................................................................... 2 sets, Ø31, Ø32
Dimensions and Weights:
Overall dimensions, assembled (L x W x H) ..................................................................................................................355 x 215 x 300 mm
Shipping dimensions (W x D x H).................................................................................................................................. 400 x 280 x 330 mm
Net weight (approximate) ..................................................................................................................................................................... 34 kg
Shipping weight (approximate)............................................................................................................................................................. 36 kg
L = length; W = width; H= height; D= depth
The specifications in this manual were current at time of publication, but because of our policy of continuous improvement, PROMAC
reserves the right to change specifications at any time and without prior notice, without incurring obligations.

5
5.0 Machine Description
1.
Motor switch
10.
Drawer for collets
2.
Lip relief angle shelf A
11.
Collet
3.
Collet chuck A
12.
Adjustment scale B
4.
Point splitting shelf A
13.
Point angle adjustment B
5.
Point angle shelf A
14.
Point angle shelf B
6.
Point angle adjustment A
15.
Point splitting shelf B
7.
Adjustment scale A
16.
Pin
8.
Alignment base A
17.
Lip relief angle shelf B
(φ2mm – φ12mm)
18.
Collet chuck B
9.
Alignment base B
19.
Handle
(φ12.1mm – φ32mm)










Erreur !
Erreur !
Erreur !
Erreur !
Erreur !
Erreur !
Erreur !
Erreur !

6
6.0 OPERATIONS
6.1. Setup the drill bit to the ER collet chuck
*Please follow step 6.1.1 and 6.1.2 to set up the drill bit to the
chuck (without tightening)
6.1.1. Determine diameter of your drill bit, and then select
the proper collet and collet chuck.
6.1.2. Insert collet into collet chuck by 45° angle, and tighten
the nut slightly.
6.1.3. Insert drill bit into collet chuck and nuts out 35mm or
so from the collet chuck, but do not tightened the drill
too tight.
6.2. Align drill bit
6.1.4. Reset the scale ring: turn the ring all the way clockwise,
and then turn it anti-clockwise to the number same as
the drill’s size.
6.1.5. Insert the chuck set into the web adjustment shelf.
Then connect it tightly. Turn it clockwise to the end.
6.1.6. Plug the drill to the end and turn it clockwise to the
end.
6.1.7. Turn the chuck set clockwise to the end and tighten it.
6.1.8. Turn the chuck set a little to the anti-clockwise and
taking it out gently.
*Make sure the cutting lip of drill is parallel with the slot of
clamping nut before grinding job started. If it is not parallel,
adjust it again.
Attention: If the cutting lip is downward, must increase the
scale of web adjustment shelf. If it is upward, please decrease
the scale of the web adjustment shelf.
When the flute length of a drill becomes shorter, the web
thickness of a drill would become thicker. So, for the same
diameter of drills, the shorter length of a drill, the higher scale
of web adjustment shelf need to be increased.
6.3. Grind the point angle
Turn the power switch on and wait until the motor rotation
is stable (about 10 seconds), put the chuck set into the point
angle grinding shelf.
The slot of clamping nut must fit with the two pins of the
grinding shelf. Insert the drill gently into grinding shelf until
reach the grinding wheel.
Grind the drill by moving left and right until the grinding
sound disappears. And then turn to the other side, do the
same to grind the drill.
* The grinding size of drill is 2mm-13mm(15mm）
* The point angle of drill is from 95°to 135°。
* While grinding, don’t hold the stem of drill, it will affect
the accuracy.

7
6.4. Grind the lip relief angle
Put the chuck set into the lip relief angle grinding shelf. The
slot of clamping nut must fit with the pin of the grinding shelf.
Insert the drill gently into grinding shelf until reach the
grinding wheel. Grind the drill by moving left and right until
the grinding sound disappears. And then turn to the other
side, do the same to grind the drill.
6.5. Point grinding point splitting
Put the chuck set into the point splitting shelf. The slot of
clamping nut must fit with the pin(B) of the grinding shelf.
Insert the drill gently into grinding shelf until reach the
grinding wheel. Grind the drill by moving left and right until
the grinding sound disappears. Turn back to the center of
pin(B) and take out, then turn to the other side, do the same
to grind the drill.
Notice: Use the 3mm wrench to do the step A if it is necessary.
The nearer to the grinding wheel, the more grinding will be,
and the pin far away from the wheel, the less grinding will be.
7.0 CLEAN AND MAINTENANCE
Please clean the whole unit with an air blow gun, especially the
holes before and after use.
8.0 REPLACING THE WHEEL
8.1. Open the wheel cover
8.1.1. Make sure it is safe that the power cord is unplugged.
8.1.2. Then use the 4mm hex wrench to lose the screw to
open the cover.
8.2. Take out the grinding wheel
8.2.1. Use the brush to clean the machine, then use dry cloth
to clean the surface.
8.2.2. If you just use the machine, please wait 3 minutes
after the grinding temperature is fall.
8.2.3. Use the left hand to hold the wheel, then use the 4mm
hex wrench to lose the screw counter-clockwise by right hand.
8.2.4. Take out the diamond grinding wheel on the machine.
8.2.5. Replace the new grinding wheel.
8.2.6. Put the wheel into the principal axis of motor, and
tighten the screw and the wheel cover to complete.
Notice: motor principal axis is very precise, if wrong work may
be leading to the damage, thus affecting grinding wheel
position.

8
9.0 Replacement Parts
JDG-0332 Assembly Breakdown -1

9
JDG-0332 Parts List for Breakdown -1
Index Part
No. No. Description Size Qty.
1----------JDG0332-101 ........................ Bottom Shell Assembly .......................................... ....................................1
2----------GB70108-0516...................... HEX-SKT-HD BOLT..................................................M5x16..........................6
3----------GB96102-06.......................... PLAIN WASHER (BIG) .............................................6...................................2
4----------GB9387-06............................ SPRING WASHER....................................................6...................................2
5----------GB70108-0620...................... HEX-SKT-HD BOLT..................................................M6x20..........................2
6----------GB9502-06............................ PLAIN WASHER ......................................................6...................................3
7----------GB9387-06............................ SPRING WASHER....................................................6...................................3
8----------GB70108-0620...................... HEX-SKT-HD BOLT..................................................M6x20..........................3
9----------GB9502-04............................ PLAIN WASHER ......................................................4...................................2
10 --------GB9387-04............................ SPRING WASHER....................................................4...................................2
11 --------GB70108-0412...................... HEX-SKT-HD BOLT..................................................M4x12..........................2
12 --------JDG0332-112 ........................ BACK PLATE ........................................................... ....................................1
13 --------GB70108-0612...................... HEX-SKT-HD BOLT..................................................M6x12..........................2
14 --------GB96202-06.......................... PLAIN WASHER (BIG) .............................................12.................................3
15 --------GB9387-12............................ SPRING WASHER....................................................12................................. 3
16 --------GB578116-1230.................... HEX BOLT...............................................................M12x30........................3
17 --------JDG0332-117 ........................ Alignment Base......................................................Ø2-12mm.....................1
18 --------JDG0332-118 ........................ Alignment Base......................................................Ø12.1-32mm................1
19 --------GB70108-0512...................... HEX-SKT-HD BOLT..................................................M5x12..........................4
20 --------JDG0332-120 ........................ Point Angle Shelf ...................................................Ø12.1-32mm................1
21 --------GB70108-0516...................... HEX-SKT-HD BOLT..................................................M5x16..........................1
22 --------JDG0332-122 ........................ Grinding Block Screw ............................................. ....................................1
23 --------GB81816-0510...................... CROSS RD CAP BOLT ..............................................M5x10..........................2
24 --------GB9502-05............................ PLAIN WASHER ......................................................5...................................2
25 --------JDG0332-125 ........................ Grinding Wheel Cover............................................Ø12.1-32mm................ 1
26 --------JDG0332-126 ........................ Grinding Wheel Cover Screw ................................. ....................................2
27 --------GB70108-0516...................... HEX-SKT-HD BOLT..................................................M5x16..........................1
28 --------JDG0332-128 ........................ Grinding Wheel Gasket.......................................... ....................................1
29 --------JDG0332-129 ........................ Heat Dissipation Blade........................................... ....................................1
30 --------JDG0332-130 ........................ Grinding Wheel ..................................................... ....................................1
31 --------JDG0332-131 ........................ Aluminum Core...................................................... ....................................1
32 --------GB8007-0512........................ HEX-SKT SET SCREW W CUP POINT ........................M5x12..........................3
33 --------GB8007-0512........................ HEX-SKT SET SCREW W CUP POINT ........................M5x12..........................1
34 --------JDG0332-134 ........................ Double Hole Plate.................................................. ....................................1
35 --------JDG0332-135 ........................ Eccentric Pin .......................................................... ....................................1
36 --------GB7707-0616........................ HEX-SKT SET SCREW W FLAT POINT .......................M6x16..........................1
37 --------GB70108-0825...................... HEX-SKT-HD BOLT..................................................M8x25..........................2
38 --------JDG0332-138 ........................ Slider ..................................................................... ....................................1
39 --------GB879100-0310.................... SPRING PIN............................................................3x10.............................2
40 --------JDG0332-140 ........................ Collet Chuck...........................................................Ø12.1-32mm................1
41 --------JDG0332-141 ........................ Main Shell Assembly.............................................. .................................... 1
42 --------JDG0332-142 ........................ Motor Board.......................................................... ....................................1
43 --------JDG0332-143 ........................ Motor .................................................................... .................................... 1
44 --------GB9502-05............................ PLAIN WASHER ......................................................5...................................4
45 --------GB9387-05............................ SPRING WASHER....................................................5...................................4
46 --------GB70108-0525...................... HEX-SKT-HD BOLT..................................................M5x25..........................4
47 --------JDG0332-147 ........................ Left Double Hole Plate ........................................... ....................................1
48 --------GB70108-0516...................... HEX-SKT-HD BOLT..................................................M5x16..........................2
49 --------GB119100-0320.................... PARALLEL PIN ........................................................3X20.............................1
50 --------JDG0332-150 ........................ Left Slider .............................................................. ....................................1
51 --------JDG0332-151 ........................ Eccentric Pin .......................................................... ....................................1
52 --------GB879100-0310.................... SPRING PIN............................................................3x10.............................2
53 --------JDG0332-153 ........................ Collet Chuck...........................................................Ø2-12mm.....................1
54 --------GB7707-0516........................ HEX-SKT SET SCREW W FLAT POINT .......................M5x16..........................1
55 --------GB8007-0506........................ HEX-SKT SET SCREW W CUP POINT ........................M5x6............................ 1

10
56 --------JDG0332-156 ........................ Left Motor Board................................................... ....................................1
57 --------GB9502-05............................ PLAIN WASHER ......................................................5...................................2
58 --------GB9387-05............................ SPRING WASHER....................................................5...................................2
59 --------GB70108-0525...................... HEX-SKT-HD BOLT..................................................M5x25..........................2
60 --------GB8007-0508........................ HEX-SKT SET SCREW W CUP POINT ........................M5x8............................ 3
61 --------JDG0332-161 ........................ Left Aluminum Core............................................... ......................................
62 --------JDG0332-162 ........................ Grinding Wheel ..................................................... ....................................1
63 --------JDG0332-163 ........................ Grinding Wheel Gasket.......................................... ....................................1
64 --------GB70108L-0512 .................... HEX-SKT-HD BOLT (LEFT HAND THREAD)................M5x12..........................1
65 --------JDG0332-165 ........................ Point Angle Shelf Screw ......................................... ....................................1
66 --------GB70108-0516...................... HEX-SKT-HD BOLT..................................................M5x16..........................1
67 --------JDG0332-167 ........................ Point Angle Shelf Assembly....................................Ø2-12mm.....................1
68 --------JDG0332-168 ........................ Left Grinding Wheel Cover..................................... ....................................1
69 --------GB81816-0510...................... CROSS RD CAP BOLT ..............................................M5x10..........................2
70 --------GB9502-05............................ PLAIN WASHER ......................................................5...................................2
71 --------JDG0332-171 ........................ Left Plate ............................................................... ....................................1
72 --------GB109603-0620.................... Key .. .....................................................................6x20.............................1
73 --------GB879100-0310.................... SPRING PIN............................................................3x10.............................1
74 --------JDG0332-174 ........................ Bridge Rectifier...................................................... ....................................1
75 --------GB81816-0418...................... CROSS RD CAP BOLT ..............................................M4x18..........................1

11
JDG-0332 Assembly Breakdown -2
JDG-0332 Parts List for Breakdown -2
Index Part
No. No. Description Size Qty.
1...........JDG0332-201 ........................ Tool Setting Screw ................................................. ....................................1
2...........JDG0332-202 ........................ Side Block of Tool Setting Seat .............................. ....................................1
3...........JDG0332-203 ........................ Tool Spring ............................................................1.1x10x10x25mm.........1
4...........JDG0332-204 ........................ Center Block of Tool Setting Seat ........................... ....................................1
5...........JDG0332-205 ........................ Tool Setting Seat.................................................... ....................................1
6...........GB70108-0412...................... HEX-SKT-HD BOLT..................................................M4x12..........................2

12
JDG-0332 Assembly Breakdown -3
JDG-0332 Parts List for Breakdown -3
Index Part
No. No. Description Size Qty.
1...........JDG0332-207 ........................ Chuck .................................................................... ....................................1
2...........JDG0332-208 ........................ Lock Chuck............................................................. ....................................1
3...........DGBB6802RS ........................ Bearing ..................................................................6802.............................2
4...........GB893186-24........................ Clip Spring for Hole................................................24.................................1

13
JDG-0332 Assembly Breakdown -4
JDG-0332 Parts List for Breakdown -4
Index Part
No. No. Description Size Qty.
1...........JDG0332-211 ........................ Eccentric Sleeve..................................................... ....................................1
2...........DGBB6807RS ........................ Bearing ..................................................................6807RS.........................2
3...........GB879100-0412.................... SPRING PIN............................................................4x12.............................1
4...........JDG0332-214 ........................ Grinding Base ........................................................ ....................................1

14
JDG-0332 Assembly Breakdown -5
JDG-0332 Parts List for Breakdown -5
Index Part
No. No. Description Size Qty.
1...........JDG0332-215 ........................ Tool Setting Screw ................................................. ....................................1
2...........JDG0332-216 ........................ Side Block of Tool Setting Seat .............................. ....................................1
3...........JDG0332-217 ........................ Tool Spring ............................................................1.1x10x10x25mm.........1
4...........JDG0332-218 ........................ Center Block of Tool Setting Seat ........................... ....................................1
5...........JDG0332-219 ........................ Tool Setting Seat.................................................... ....................................1
6...........GB70108-0512...................... HEX-SKT-HD BOLT..................................................M5x12..........................2

15
JDG-0332 Assembly Breakdown -6
JDG-0332 Parts List for Breakdown -6
Index Part
No. No. Description Size Qty.
1...........JDG0332-221 ........................ Chuck .................................................................... ....................................1
2...........JDG0332-222 ........................ Lock Chuck............................................................. ....................................1
3...........DGBB6807RS ........................ Bearing ..................................................................6807RS.........................2
4...........GB893186-47........................ Clip Spring for Hole................................................47................................. 1

16
JDG-0332 Assembly Breakdown -7
JDG-0332 Parts List for Breakdown -7
Index Part
No. No. Description Size Qty.
1...........JDG0332-225 ........................ Grinding Base ........................................................ ....................................1
2...........GB879100-0412.................... SPRING PIN............................................................4x12.............................1
3...........DGBB6812RS ........................ Bearing ..................................................................6812RS.........................2
4...........JDG0332-228 ........................ Eccentric Sleeve..................................................... ....................................1

17
JDG-0332 Assembly Breakdown -8
JDG-0332 Parts List for Breakdown -8
Index Part
No. No. Description Size Qty.
1...........GB70215-0408...................... HEX-SKT-HD RD CAP BOLT .....................................M4x8............................2
2...........GB9502-04............................ PLAIN WASHER ......................................................4...................................2
3...........JDG0332-303 ........................ Grinding Wheel Cover............................................ ....................................1
4...........JDG0332-304 ........................ Hinge..................................................................... ....................................1
5...........GB9502-04............................ PLAIN WASHER ......................................................4...................................2
6...........GB617000-04........................ HEX Nut .................................................................M4 ...............................2

18
JDG-0332 Assembly Breakdown -9
JDG-0332 Parts List for Breakdown -9
Index Part
No. No. Description Size Qty.
1...........JDG0332-307 ........................ Drawer Handle ...................................................... .................................... 1
2...........JDG0332-308 ........................ Drawer .................................................................. ....................................1
3...........JDG0332-309 ........................ Foot Pad ................................................................ ....................................4
4...........JDG0332-310 ........................ Bottom Shell.......................................................... ....................................1
5...........GB617000-10........................ HEX Nut .................................................................M10 .............................4
6...........JDG0332-312 ........................ Power Plug in Module............................................ ....................................1
7...........GB819116-0305.................... CROSS COUNTERSUNK FLAT HD BOLT....................M3x5............................2
8...........GB70215-0408...................... HEX-SKT-HD RD CAP BOLT .....................................M4x8............................1
9...........GB9502-04............................ PLAIN WASHER ......................................................4...................................1

19
JDG-0332 Assembly Breakdown -10
JDG-0332 Parts List for Breakdown -10
Index Part
No. No. Description Size Qty.
1...........JDG0332-316 ........................ Handle................................................................... ....................................1
2...........JDG0332-317 ........................ Switch.................................................................... ....................................1
3...........GB9502-04............................ PLAIN WASHER ......................................................4...................................2
4...........GB9387-04............................ SPRING WASHER....................................................4...................................2
5...........GB70108-0412...................... HEX-SKT-HD BOLT..................................................M4x12..........................2
6...........JDG0332-321 ........................ Main Shell.............................................................. ....................................1

20
10.0 Wiring Diagrams
JDG-0332……………….1~230V, PE, 50Hz