Description

Tapered drill rod

There are two standard steel hex diameters - 22mm or 25mm. And Our tapered bit and rods come in a variety of taper angles(6 degree, 7 degree, 11 degree, 12 degree)

SUPERDRILL tapered rods are available with high-frequency or fully carburized heat treatments.

Taper Angle：6°,7°,11°,12°

Socket Diameter：H19，H22，H25 MM

Shank Dimension：83,108,159 MM

Order Guide:

Shank Types + Taper Degree + Rod Length

Advantage

1，Apply Boring Method processing as same as internationally well-known brand

2，Entire heat-treatment ensuring the excellent quality

3，Accurate dimension of taper degree perfectly matches the bit

4，Very cost-effective

Why There are many different Taper?

Different taper angles are used for different rock formations and Rock drills. A wide taper angle is normally used when drilling with high impact hydraulic rock drills in medium hard to hard and abrasive rock formations. Taper angles of 11°and 12° are common on modern rigs.

A narrow taper angle of 7°is used for low impact rock drills and softer rock formations. This angle can also be used if you have spinning problems when using 11° or 12° equipment.

In addition, a 4°46' angle is ideal for soft rock when you’re using pneumatic or hydraulic drill rigs – to prevent bits from spinning or becoming detached.

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