Q651-R32 Thread Button Bit, 51 mm

Description

Q651-R32 Thread Button Bit — 51 mm

The Q651-R32 is a threaded button bit with a 51 mm head diameter and six spherical tungsten carbide buttons, made for top-hammer rock drilling in medium-hard to hard formations. The bit body is machined from heat-treated alloy steel with carbide inserts pressed into precision-drilled holes, and the R32 thread connects directly to standard top-hammer drill rods.

Specification

• Model: Q651-R32
• Head diameter: 51 mm
• Button count: 6 spherical tungsten carbide buttons
• Thread connection: R32 (also available in R25, R28, R38, T38, T45, T51)
• Button shape: spherical — recommended for hard and abrasive rock (ballistic optional)
• Face design: flat face or drop center (optional)
• Body material: heat-treated alloy steel
• Inserts: tungsten carbide
• Compatible machines: Atlas Copco, Sandvik and other top-hammer hydraulic rock drills
• Applications: bench drilling, production drilling, tunneling, mining, quarrying

Features

• Six spherical tungsten carbide buttons give balanced coverage and the longest service life in hard, abrasive rock.
• Precision-machined R32 thread ensures a secure, low-wear connection to standard top-hammer drill rods.
• Forged, heat-treated alloy steel body resists cracking under high impact energy.
• Carbide buttons hot-pressed into precision-drilled holes stay tight even after thousands of meters.
• Efficient flushing design clears cuttings quickly and reduces button wear.

How to read the model number

Q651-R32 follows the RDT coding system: Q = spherical (ball) button bit, 6 = 6 carbide buttons, 51 = 51 mm head diameter, R32 = R32 thread connection.

Frequently asked questions

What does the model number Q651-R32 mean?

In this series, Q stands for a spherical button bit, 6 is the number of tungsten carbide buttons, 51 is the head diameter in millimetres, and R32 is the thread connection that fits standard R32 drill rods.

Which thread size do I need?

Match the thread to your drill rods. R32 is the most common thread for 51 mm top-hammer bits; R25 and R28 are typical for smaller diameters, while R38, T38, T45 and T51 suit larger holes and heavier rigs. If you are unsure, send us a photo of your rod end and we will confirm the match.

Can I order other diameters, threads or insert shapes?

Yes. Bit diameter, thread size (R25–T51), insert shape (spherical or ballistic) and face design are all made to order. OEM markings, custom insert grades and private-label packaging are available on request.