U.S. Solid MR-13D User manual

DRILL BIT GRINDER
MODEL: MR-13D
OPERATING INSTRUCTION

PLEASE REMEMBER
1. When using electric tools, machines or equipment, basic safety
precautions should always be followed to reduce the risk of fire, electric
shock, and personal injury.
2. Keep work area clean. Cluttered areas invite injuries
3. Consider work area conditions. Don’t use machines or power tools in
damp, wet or poorly lit locations. Don’t expose equipment to rain, keep work
area well lit. Don’t use tools in the presence of flammable gases or liquids.
4. Keep children away, all children should be kept away from the work area.
5. Guard against electric shock. Prevent bodily contact with grounded
surfaces such as pipes, radiators, ranges, and refrigerator enclosures.
6. Stay alert. Never operate if you are tired.
7. Don’t operate the product if under the influence of alcohol or drugs. Read
warning labels on prescriptions to determine if your judgment or reaction
might be impaired.
8. Don’t wear loose clothing or jewelry as they can be caught in moving
parts.
9. Wear restrictive hair covering to contain long hair. Use eye and ear
protection.
10. Keep proper footing and balance at all times.
11. Don’t reach over or across running machines.
Before operating
1. Be sure the switch is OFF when not in use and before plugging in.
2. Don’t attempt to use inappropriate attachments in an attempt to exceed
the tools capacity. Approved accessories are available from the dealer or
machine maker.
3. Check for damaged parts, before using any tool, any part that appears
damaged should be carefully checked to determine that it will operate
properly and perform its intended function.
4. Check for alignment and binding of all moving parts, broken parts or
mounting fixture and any other condition that may affect proper operation.
Any part that is damaged should be entirely or replaced by a qualified
technician.

5. Do not use the tool if any switch does not turn off and on properly.
MAIN APPLICATION AND CHARACTERISTICS
1. Patent 13D can sharpen the drill bit front cutting lip ,lip relief angle and
point angle,you also can control the center spot at random instead of center
drill,escape of chips easily.drill with a light heart.
2. With Taiwan diamond grinding wheel, it can be equipped directly with an
accurate angle and long service life.
3. The electrically controlled and powerful DC motor: stable frequency,
strong horsepower and long service life.
Model
Grindin
g
Range
Point angle
Powe
r
Motor/
Speed
Weight
Dimension
MR-13
D
Ф3(2)-
ф13(15
)
100°(95°)-
135°
220V,
50HZ
180W/
4800rpm
10KG
32×18×19
cm
Standard
Equipment
Grinding wheel :CBN (for HSS)×1 piece
11collets: ф3-ф13
collet chuck ×1 piece
Electric wire: 1piece
2 pcs hexagon wrench (3,5mm)
Optional
Equipment
grinding wheel :SD (for Carbide)
ER20 collet: ф2.5, ф3.5 ф4.5 ф5.5 ф14, ф15
Collet chuck: ф15mm

OPERATIONS
A. Setup the drill bit to the ER collet chuck
*Please follow step 1,2 to set up the drill bit to the chuck (without tightening)
1. Determine diameter of your drill bit, and then select the proper
collet and collet chuck.
2. Insert collet into collet chuck by 45°angle, and tighten nut slightly.
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.
※Do not fully fasten the clamping nut with collet chuck, keep the
drill able to be adjusted.
B. Align drill bit
1. 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.
2. Insert the chuck set into the web adjustment shelf. Then connect it tightly.
Turn it clockwise to the end.
3. Plug the drill to the end and turn it clockwise to the end.
4. Turn the chuck set clockwise to the end and tightens it
5. 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.
C. 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.

D. 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.

E. 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.

CLEAN AND MAINTENANCE
Please clean the whole unit with an air blow gun, especially the holes
before and after use
REPLACING THE WHEEL
A. Open the wheel cover
1. Make sure it is safe that the power cord is unplugged
2. Then use the 4mm hex wrench to loose the screw to open the cover.
B. Take out the grinding wheel

1. Use the brush to clean the machine, then use dry cloth to clean the
surface.
2. If you just use the the machine, please wait 3 minutes after the grinding
temperature is fall.
3. Use the left hand to hold the wheel, then use the 4mm hex wrench to
loose the screw counterclockwise by right hand.
4. Take out the diamond grinding wheel on the machine.
5. Replace the new grinding wheel.
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.