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Carbide Step Drill Bits - Straight Shank, DLC Coated, Stub

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Volume Discount

MISUMI

Reducing the number of steps enables higher efficiency drilling of pilot holes

Part Number

Configured Part Number is shown.

Drawing
Part Numbers
Specification and price
Features and Example

DLC Coated Carbide Stepped Drill for Aluminum Machining, Stub:Related Image

: 30; 45; 60

Part Number
DLC-SC-SDR6.8-24
DLC-SF-SDR8.5-20
DLC-SF-SDR8.5-30
DLC-SF-SDR10.3-36

Minimum order quantity	Volume Discount	Days to Ship	Hole Diameter (Drilling Diameter) D (mm)	Groove Length (ℓ) (mm)	Overall Length (L) (mm)	Step Length ℓ (mm)	Shank Diameter d	Diameter Tolerance	Tolerance of Shank Diameter	Use	Major Diameter D1 (φ)
1 Piece(s)	Available	8 Days or more	6.8	48	104	24	10	0 ~ -0.018	0 ~ -0.009	For Chamfering	10
1 Piece(s)	Available	8 Days or more	8.5	50	112	20	12	0 ~ -0.018	0 ~ -0.011	Cutting	12
1 Piece(s)	Available	8 Days or more	8.5	60	122	30	12	0 ~ -0.018	0 ~ -0.011	Cutting	12
1 Piece(s)	Available	8 Days or more	10.3	72	136	36	14	0 ~ -0.022	0 ~ -0.011	Cutting	14

Specifications

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

Basic Information

Work Material	Cast Iron / Aluminum / Copper	Tool Material Type	Carbide	Link Model	Straight Shank
Coating Presence	Included	Coating Type	DLC	Oil-Hole Presence	None
Point Angle(°)	130	Thinning	Included