|
Drill Bit
|
Bit Dia. (mm)
|
Air Holes No.
|
Gauge Buttons
|
Front Buttons
|
|
HD275
|
311
|
3
|
15*Φ18
|
36*Φ16
|
|
334
|
3
|
18*Φ19
|
44*Φ18
|
|
|
356
|
3
|
18*Φ19
|
48*Φ18
|
|
|
368
|
3
|
20*Φ19
|
50*Φ18
|
|
|
381
|
4
|
20*Φ19
|
54*Φ19
|
|
|
HD330
|
381
|
4
|
20*Φ19
|
54*Φ18
|
|
406
|
4
|
20*Φ19
|
58*Φ18
|
|
|
431
|
4
|
20*Φ19
|
64*Φ18
|
|
|
445
|
4
|
24*Φ20
|
72*Φ18
|
|
|
470
|
4
|
24*Φ20
|
80*Φ18
|
|
|
HD475
|
495
|
4
|
24*Φ20
|
88*Φ18
|
|
525
|
4
|
24*Φ20
|
100*Φ18
|
|
|
580
|
4
|
24*Φ20
|
116*Φ18
|
|
|
660
|
4
|
28*Φ20
|
140*Φ19
|
|
|
680
|
4
|
28*Φ20
|
144*Φ19
|
|
|
HD525
|
711
|
4
|
28*Φ20
|
154*Φ19
|
|
762
|
4
|
32*Φ20
|
172*Φ19
|
|
|
780
|
4
|
32*Φ20
|
180*Φ19
|
|
|
825
|
4
|
36*Φ20
|
216*Φ19
|
|
|
998
|
4
|
40*Φ20
|
348*Φ19
|
We can design and manufacture according to customer's requirement of the Bit diameter, number of air holes, carbide button shape and the face shape.