Drifting and tunneling
Sandvik Alpha. α250 bit thread
2-1_407b
Button bit
Cross bit
Shank adapter
Coupling sleeve
Drifter rod
Flushinghole, mm
Front
Gauge
No Size No Size
Reaming tools
Buttons, mm
Front
Gauge No Size No Size Angle
Dimensions
D
mm in
Bit
classi-
fication
Part No.
2-1_384
RT300 button bit, type 52
D
1x4,5
1x5
1x5
1x6
1x6
1x6
1x6
1x6
1x6
1x6
2x7
2x7
2x7
2x7
2x8
5x7
5x9
5x9
5x9
5x9
45°
35°
30°
35°
35°
33
35
37
38
41
1 5/16"
1 3/8"
1 29/64"
1 1/2"
1 5/8”
HMCA
HMCA
HMCA
HMCA
HMCA
7764-4433-S48
7764-4435-S48
7764-5237-S48
7764-5238-S48
7764-5241-S48
D
1x5
1x5
1x5
1x5
2x5
2x5
2x5
2x5
–
–
–
–
–
–
–
–
–
33
35
38
41
1 5/16"
1 3/8"
1 1/2"
1 5/8”
–
–
–
–
7764-1633-42
7764-1435-42
7764-1438-42
7764-1441-42
D
mm
in
2-1_4
Cross bit
Dimensions
L
mm
ft
in
Part No.
R32
D
A 250
L
2-1_337b
Drifter rod, R32 - Hex 25 - α250
2475
2630
3190
3700
8'
8'
10'
12'
1 7/16"
7 9/16"
5 19/32"
1 1/2"
25
25
25
25
1"
1"
1"
1"
2475
2630
2935
3190
8'
8'
9'
10'
1 7/16"
7 9/16"
7 9/16"
5 19/32"
28
28
28
25
1 1/8"
1 1/8"
1 1/8"
1"
150
–
5 29/32"
–
–
–
7853-1724-20
7853-1726-20
7853-1731-20
7853-1737-20
Flushing hole Ø 8.6 mm.
R32
D
A 250
L
2-1_337b
Drifter rod, R32 - Hex 28 - α250
7853-1824-20
7853-1826-20
7853-1829-20
7853-1831-20
Flushing hole Ø 8.8 mm.
2-1_17
R32 coupling sleeve
D
44
1 47/64" 7993-3644
L
Reaming tools for cut holes / Pilot adapter, 6° taper
D
Thread α250
Buttons, mm Front Gauge Angle
2-1_116
26
1 1/32" 7822-2726
Dimensions
D
mm in
Part No.
2-1_110
Reaming tools for cut holes / Reaming bit, 6° taper
D
4x8
4x10
4x10
8x9
8x10
8x10
25°
30°
30°
64
76
89
2 1/2"
3"
3 1/2"
7722-4864-S45
7722-4876-S45
7722-4889-S45
top hammer drilling tools
• 21