Norton 66243530429 Type 6 Grinding Wheel 80 Grit

Product Description

The NORTON 66243530429 is a Type 6 straight-cup grinding wheel designed for precision tool grinding and surface grinding applications. The wheel measures 4 inches in diameter with a 10 mm (approximately 0.39 inches) face width and an overall thickness of 50 mm (approximately 1.97 inches). It is manufactured from white aluminum oxide abrasive bonded with a vitrified bond, rated at 80 grit with a J hardness code (medium grade). The friable aluminum oxide grain breaks down to expose fresh cutting edges during use, making this wheel well suited for grinding high-speed steel and other tool steels. Licensed trade professionals and tool room technicians are the primary installers of this wheel.

This wheel is used in bench grinder and pedestal grinder setups for tool room, maintenance, and production environments. It performs well on ferrous metals and is a standard choice for sharpening and reconditioning cutting tools such as drills, end mills, and lathe bits. The Type 6 straight-cup form allows access to flat faces and relief angles on tooling. It is appropriate for light to moderate stock removal at controlled feed rates. Both residential shop settings and light commercial tool rooms use this wheel type regularly.

Key Features

• White aluminum oxide abrasive for cool, free-cutting action on tool steels
• Vitrified bond provides rigidity and consistent wheel form during grinding
• 80 grit medium grade suits finish grinding and light stock removal
• J hardness (medium) helps the wheel release dull grains to maintain cut rate
• Friable grain construction extends usable wheel life on hard materials
• 5,730 maximum RPM rating matched to standard bench grinder speeds

Compatibility

Designed as an OEM-style replacement and standard fitment Type 6 straight-cup grinding wheel for bench grinders and pedestal grinders equipped with a 20 mm arbor hole.

Installation Notes

Grinding wheel installation and dressing should be performed by a qualified technician following ANSI B7.1 safe-use standards. Always disconnect power and verify the machine is at a full stop before mounting or removing a wheel. Inspect the wheel for cracks or chips using the ring test before installation, and never exceed the rated maximum RPM of 5,730. A proper wheel guard must be in place before operating the grinder.