Specifications

Taper knock off bit
Type: various
taper angle 4,4 46',7,11,12
Socket inside Dia.=15,19,22,25mm
Usage:drill/quarry

 6  7 11 12 degree Diameter 32mm Taper Knock off drill bit        

(Taillant conique pour le forage de Xiamen Bestlink)

Our tapered knock off bits are made with high quality alloy steel bar and tungsten carbides, through heat treatment.

Caracteristique:

(1)Taper angle: 4°,4°46″,6°,7°,11°,12°

(2)Models:chisel/cross/button bit

(3)Dia:20-45 mm

(4)Button bit shape:spherical/parabolic

(5)Socket inside dia:15/19/22/25mm

1.Tapered chisel bit

Widely used in drilling holes with depth less than 5 meters and diameter ranged in 20-45 mm by light-duty rock drill, like Y6. 

Description		Diameter	Length	Water hole
Taper degree a=4°,6°,7°,11°,12° Socket inside d=15,19,22,25mm		mm	mm	2
		20	65	2
		23	65	2
		25	69	2
		28	60	2
		30	55 88	2
		32	55 64 71 80	2
		34	71 80	2
		36	74	2
		38	74	2
		40	74	2
		42	74	2
		45	74	2

2.Tapered cross bit

Used under any rock drilling condition and mainly used for hard or very hard rock formation because of it's comprehensive adaptability. Compared with taper chisel bits, taper cross bits have a better drilling performance because of carbide tips on cross bits doubled.

Description		Diameter	Length	Weight
Taper degree a=6 °,7°,11°,12° Socket inside d=19,22,25mm		mm	mm	kg
		28	71 80	0.19
		29	71 80	0.2
		30	50 67 71 80	0.3
		32	50 67 71 80	0.3
		33	71 80	0.32
		34	67 71 80	0.34
		35	67 71 80	0.35
		36	71 80	0.36
		38	67 71 80	0.42
		40	71 80	0.43
		41	71	0.45
		42	69 80	0.46
		44	80	0.47
		45	80	0.5

3.Tapered Button Bits

Comparing with taper chisel and cross bits, button bits have higher technology, much longer primary drilling time and higher drilling efficiency. According to the tungsten carbide insert, button bits can be divided into types of hemispherical, conical and parabolic button.

Description	Diameter	Length	No. of button	Weight
Taper Angle a=4°46″,6 °,7°,11°,12° Socket inside d=19,22,25mm	mm	mm	pcs	kg
	28	50	4	0.2
	29	50	4 5 6 7	0.2
	30	50 80	5 6 7 8	0.2 0.3
	32	50 55 71 80	6 7 8 9	0.2 0.22 0.3
	33	50 55 71 80	6 7 9	0.2 0.3 0.36
	34	50 55	7 8	0.22 0.3
	35	55 71 80	4 5 6 7	0.22 0.3 0.37
	36	50 55	7	0.3 0.35
	37	55	4 6 7	0.3
	38	50 55	4 6 7	0.25 0.35
	40	50 55	7	0.35
	41	50 55 71	4 5	0.35
	42	50	6 7	0.4
	45	50 55 71	6 7 8 9	0.5