Description

Tapered Drill Bit Construction

The head and steel body of the tapered drill bit are integrally forged.

Drill Bit Types

Chisel-Type Drill Bit

The chisel-type drill bit can achieve precise drilling in hard rock, with cutting edges designed to penetrate the rock and create holes of the required diameter and depth.

Cross-Type Drill Bit

The cross-type drill bit is suitable for medium to hard rock.

Technical Specifications

Taper: 7 degree, 11 degree, and 12 degree are available
Head material: embedded tungsten carbide inserts
Bit body material: high-strength alloy steel
Flutes: arranged straight or spirally along the drill bit for chip removal and air or water circulation for cooling
Head design: chisel type and cross type available
Connection type: tapered
Diameter: 38mm, 40mm, 42mm, 45mm, and 50mm available
Weight: ranges from 0.3 kg to 0.5 kg

Technical Parameters

12 degree tapered chisel bit for light rock drilling tools
Taper bit、Insert	D		Insert H x T	Taper	Order number	Weight kg
Taper bit、Insert	mm	inch	Insert H x T	Taper	Order number	Weight kg
Chisel	38	1 1/2	13 x 9 mm	7 degree	B118-3813-2710	0.3
			15 x 10 mm		B118-3815-2710	0.3
			17 x 10 mm		B118-3817-2710	0.4
	40	1 9/16	13 x 9 mm	7 degree	B118-4013-2710	0.3
			15 x 10 mm		B118-4015-2710	0.4
			17 x 10 mm		B118-4017-2710	0.4
	42	1 5/8	15 x 10 mm	7 degree	B118-4215-2710	0.4
Cross	38	1 1/2	12 x 8 mm	7 degree	B128-3812-2710	0.4
	40	1 9/16	12 x 8 mm		B128-4012-2710	0.4
	42	1 5/8	12 x 8 mm		B128-4212-2710	0.4
	45	1 3/4	12 x 8 mm		B128-4512-5710	0.5
	50	1 31/32	12 x 10 mm		B128-5012-5710	0.5
	38	1 1/2	12 x 8 mm	12 degree	B128-3812-2210	0.4
	40	1 9/16	12 x 8 mm	12 degree	B128-4012-2210	0.5
	38	1 1/2	12 x 8 mm	11 degree	B128-3812-2110	0.4
	40	1 9/16	12 x 8 mm	11 degree	B128-4012-2110	0.5

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12 degree tapered chisel bit for light rock drilling tools