Carbide Step Drill Bits

Specifications

Model Number		Step Length ℓ	Large Diameter D1	Groove Length ℓ1	Overall Length L	Shank Diameter d
	Tip Diameter D
DLC-SC-SDR (For chamfering) DLC-SF-SDR (For cutting)	3.4	8	6	21	73	6
		12	6	25	77	6
	4.3	10	7	26	79	7
		15	7	31	84	7
	5.1	12	8	30	84	8
		18	8	36	90	8
	6.8	16	10	40	96	10
		24	10	48	104	10
	8.5	20	12	50	112	12
		30	12	60	122	12
	10.3	24	14	60	124	14
		36	14	72	136	14

For Cutting Conditions, Refer to >>Click here.

More Information

● The DLC coating has excellent wear-resistant and welding-resistant properties that make it ideal for machining non-ferrous metals such as aluminum, copper, etc.
● A strong torsion shape provides superior discharge of cutting chips and cutting capability.
● Designed for very frequent drilling of pilot holes for M4 – M12 metric coarse thread.
● Two models of step angle are available for chamfering and cutting.
● High-efficiency hole drilling is achieved by reducing the chamfering process. (DLC-SC-SDR)
● When drilling pilot holes for bolts, relief holes can also be drilled at the same time. (DLC-SF-SDR)