Thread R28

Top Hammer Drilling Tools for Drifting and Tunneling

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 3 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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