Tapered Drill Bits

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Rock drilling bits

Our tapered drill bits can be made into three shapes, tapered cross bits, tapered chisel bits and tapered button bits, which can definitely meet customers’ demands to drill holes with a small diameter. Typically, tapered drill bits are used with small handheld rock drills. But, our top hammer drill bits feature robust structure and excellent quality and thus can also be used with powerful hydraulic drilling rigs.

Taper Rock Drill Bits	D		Alloy	Taper Angle
Tapered Cross Bit	mm	inch	Height × Thickness	Taper Angle
	34 36 38 40 42 45 50	1 11/32 1 13/32 1 1/2 1 9/16 1 5/8 1 3/4 1 31/32	12×8 12×8 12×8 12×8 12×8 12×8 16×10	7°
	32 35 38 40	1 1/4 1 3/8 1 1/2 1 9/16	12×8 12×8 12×8 12×8	12°
	38 40	1 1/2 1 9/16	12×8 12×8	11°

Taper Rock Drill Bits	D		Alloy	Taper Angle
Tapered Chisel Bit	mm	inch	Height × Thickness	Taper Angle
	38	1 1/12	13×9 15×10 17×10	7°
	40	1 9/16	13×9 15×10 17×10	7°
	42	1 5/8	13×9 15×10 17×10	7°

Taper Rock Drill Bits	D		Buttons × Button Diameter		Gauge Button Angle	Taper Angle
Tapered Button Bits	mm	inch	Gauge Button	Face Button	Gauge Button Angle	Taper Angle
	38 40 42	1 1/2 1 9/16 1 5/8	3×9 3×9 3×9	1×8 1×8 1×9	40°	7°
	38 40 42	1 1/2 1 9/16 1 5/8	3×9 3×9 3×9	2×8 2×8 2×9	40°	12° 7° 7°
	38 41 42	1 1/2 1 9/16 1 5/8	5×9 5×9 5×9	2×7 2×8 2×8	40°	12° 11° 12°