Thread R28

Top Hammer Drilling Tools for Drifting and Tunneling

Inquiry Form
Thread R28

Bit Diameter: 38mm-45mm
Length of drill rod: 2800mm-4310mm
Button bit design: Flat face, drop center, normal and retrac body.
Tungsten carbide (Buttons): Spherical, ballistic and conical.
Applications: Drifting, tunneling, bench

We have different designs for various rock formations, and a longer service life to decrease use costs for users.

Button bit Dimensions D Flushing hole
(mm) 		Buttons
(mm) 		Angle Class Part no.
mm in Front
No
size 		Gauge
No
size 		Front
No
size 		Gauge
No
size
38
41
43
45 		1 1/2
1 5/8
1 11/16
1 3/4 		1×5
1×5
1×5
1×5 		2×5
2×5
2×5
2×5 		2×7
2×8
2×8
2×9 		5×9
5×9
5×10
5×11 		30°
30°
30°
30° 		H
H
H
H 		3038R2807
3041R2807
3043R2807
3045R2807
41 1 5/8 2×5.5 2×5 2×8 6×9 30° S 3041R2808
43
45 		1 11/16
1 3/4 		3×5
3×5 		- 1×5 3×8
3×8 		6×9
6×10 		30°
30° 		M
M 		3043R2809
3045R2809
Reaming tools
Pilot bit 6° taper
 40 1 37/64 2×5 2×5.5 2×8 4×9 30° - 3040R2806KP
Reaming bit 6° taper
76 3 - - - 8×11 35° - 3076R2808KR
Dome bit
76 3 2×9 2×7 1×11 14×11 35° - 3076R2815KD

Drill rod Dimensions L Dimensions D Part no
mm ft in mm in
Hex rod 28 with thread R28/ R32
2800
3100
3700 		9
10
12 		2
2
2 		28
28
28 		1 1/8
1 1/8
1 1/8 		2128R32R2828
2128R32R2831
2128R32R2837
Hex rod 32 with threads R28/ R32
4310 14 2 32 1 1/4 2132R32R2843

Coupling L (mm) Dimensions D Part no
mm in
R32-R28
160 37 1 29/64 MX-R283716
Crossover coupling R28-R32
171 45 1 3/4 MX-R28R324517
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