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Litian Heavy Industry Machinery Co., Ltd
Litian Heavy Industry Machinery Co., Ltd
Small Hole Drilling Tools

Small Hole Drilling Tools

Small Hole Rock Drilling Tools Specification


Tapered Drill Bit

Taper

7°, 11°, 12°

Bit Type

Tapered button bit, Chisel bit, Cross type bit 

Head Diameter

28mm~48mm

Tapered Drill Rod

Taper

7°, 11°, 12°

Rod Diameter

Hex22, Hex25

Length

400mm-5500mm

Integral Drill Rod

Rod Diameter

Hex19, Hex22

Bit Diameter

24mm~40mm

Shank Length

108mm

Effective Length

400mm~6400mm


Contact Drill Rod Factory
Litian Updates
Jun 05-2026
Why Are My Button Bits Losing Buttons?
If you’ve been in rock drilling for any length of time, you know the frustration all too well. You’re making good progress, penetration rates are steady, and then suddenly—a button is gone.
May 30-2026
R32 Button Bits: Sizes, Threads and Applications
The R32 button bit is the most widely used small- to medium-diameter threaded drill bit in top hammer rock drilling. Its defining feature is the R32 rope thread, which has a nominal 32 mm major diamet...
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