Norton 66243529736 Internal Grinding Wheel 60 Grit

Product Description

The NORTON 66243529736 is a Type 1 internal grinding wheel designed for precision bore and internal diameter grinding operations. Built with aluminum oxide abrasive and a vitrified bond, it delivers consistent stock removal and controlled finish on ferrous metals and hard materials. The wheel carries a medium grade rating with K hardness, making it suited for moderate material removal where surface finish still matters. Rated to a maximum of 8,120 RPM, it is engineered for use on dedicated internal grinding spindles operated by qualified grinding machine technicians or toolroom machinists.

This wheel is intended for internal grinding applications, including bore finishing, bushing seats, and cylinder ID work on ferrous components. Its compact geometry — 4 inches in diameter, 1/4 inch thick, and a 3/4 inch arbor hole — fits standard internal grinding quills and spindle arbors used in production toolrooms and machine shops. The no-recess configuration simplifies mounting and suits through-hole bore grinding setups. Sold as a single unit per package.

Key Features

• Aluminum oxide abrasive provides reliable cutting action on steel, cast iron, and hardened ferrous alloys
• Vitrified bond offers rigidity and consistent wheel breakdown for uniform finish
• Medium grade (K hardness) balances material removal rate and surface finish quality
• 60 grit abrasive suits roughing to semi-finish internal bore operations
• No-recess Type 1 configuration for straightforward arbor mounting
• Maximum spindle speed of 8,120 RPM — do not exceed

Compatibility

Designed as an OEM-style replacement or standard stock internal grinding wheel for use on internal grinding machines accepting a 3/4 inch arbor bore with a 4 inch diameter Type 1 wheel configuration.

Installation Notes

Installation and wheel dressing should be performed by qualified grinding machine operators following applicable ANSI B11.9 and OSHA 29 CFR 1910.215 grinding safety standards. Always power down and lock out the grinding machine before mounting or removing a wheel. Inspect the wheel for cracks or chips before mounting and perform a ring test per manufacturer recommendations. Never exceed the rated maximum spindle speed of 8,120 RPM.