Spherical Ballistic Diamond Grinding Cup For Rock Drill Bits

Grinding Cup for Button Bits

Brighttop Global Co., Ltd. provides durable grinding cups for restoring worn carbide buttons on rock drilling bits. These grinding tools help reshape worn buttons, maintain the required button profile and support consistent drilling performance.

Different grinding cup designs are available for grinding the carbide button, removing steel around the button or completing both operations during the same grinding process. Multiple diameters and profiles are available for spherical, semi-ballistic, full-ballistic and conical buttons.

Our grinding cups can be supplied with different shank connections to fit compatible pneumatic and handheld button bit grinders. They are suitable for DTH bits, threaded button bits, tapered button bits, top hammer bits and other carbide-button drilling tools.

Water cooling is recommended during grinding to control heat, clean the grinding surface and help extend the working life of the grinding cup. Epiroc also recommends water cooling for grinding cups and describes their use with handheld systems for top hammer and down-the-hole button bits.

Shaft styles: Drive arrangements are standardized to suit the most common grinding machines:
Picture	Type	Main Structure	Commonly Compatible Equipment	Key Features
	Wing (Shoulder) Drive	8 mm round shank with a drive shoulder or wing, usually fitted with an O-ring	Jasco, Dorey, KING PIN and similar grinding machines	Transfers torque through the shoulder for stable positioning; one of the most common universal connections
	San-Drive / Sancup	9 mm shank with a dedicated positioning structure	Sanroc, Sanbee and similar systems	Mainly designed for SV grinding machines; compatibility cannot be determined by shank diameter alone
	Plain Shaft	8 mm or 9 mm cylindrical straight shaft	Grinding machines using collets, drill chucks or universal chucks	Simple structure and relatively wide compatibility, but the chuck must clamp the shaft securely to transmit torque
	Atlas Copco Teroc 55-Drive	Dedicated 55-drive connection structure	Teroc 55 grinding systems	A dedicated connection with fast installation and accurate positioning; cannot directly replace a standard 8 mm or 9 mm shaft
	Hex-Drive	Internal hexagonal socket or dedicated hex connection inside the cup shank	CME series grinding machines	The hexagonal surfaces transmit torque directly and reduce slipping; normally requires a matching CME chuck

Key Features

• High-performance abrasive grinding surface
• Accurate restoration of carbide button profiles
• Multiple grinding diameters available
• Spherical and ballistic profiles available
• Optional coolant slots
• Different shank connections available
• Suitable for handheld grinding machines
• OEM production and customized packaging supported