• Model NO.：metric and inch
• Size：0.5mm to 20mm
• Work Type：External Work
• Transport Package：Plastic Box
• Specification：0.5mm to 20mm
• Trademark：stc
• Origin：Zhenjiang
• HS Code：82075090
• Production Capacity：100000PCS,Year

Basic Info.

Model NO. metric and inch Size 0.5mm to 20mm Work Type External Work Transport Package Plastic Box Specification 0.5mm to 20mm Trademark stc Origin Zhenjiang HS Code 82075090 Production Capacity 100000PCS/Year

Product Description

Our solid carbide drill bits are made from high quality carbide  by Germany or Italy machinery  machineries.
Hardness 90-91hra. 

kinds of coating avialable on request.

DIN, JIS,ISO, GOST available on request.


GOST 17275
 

d	l	L		d	l	L		d	l	L		d	l	L
3	24	55		5.5	40	75		8	52	95		10.2	60	105
3.2	24	55		5.8	40	75		8.2	52	95		10.5	60	105
3.5	28	60		6	40	75		8.5	52	95		10.8	65	110
3.8	30	63		6.2	42	80		8.8	55	100		11	65	110
4	30	63		6.5	42	80		9	55	100		11.2	65	110
4.2	30	63		6.8	45	85		9.2	55	100		11.5	65	110
4.5	32	65		7	45	85		9.5	60	105		11.8	65	110
4.8	36	70		7.2	45	85		9.8	60	105		12	70	120
5	36	70		7.5	45	85		10	60	105
5.2	36	70		7.8	52	95