Norton 66243530419 Type 11 Grinding Wheel 4in 80 Grit

Product Description

The NORTON 66243530419 is a Type 11 flaring cup grinding wheel built for tool and surface grinding applications. It uses a Ceramic Alumina abrasive bonded with a vitrified bond system, rated at J hardness for medium-grade stock removal. The wheel measures 4 inches in diameter with a 1.5-inch overall thickness and a 0.25-inch face width, spinning safely at up to 5,730 RPM. The semi-friable Ceramic Alumina grain self-sharpens as it cuts, maintaining consistent cut rate across the wheel life. Specification code 5SG80-JVS identifies the exact formulation. Licensed tradespeople in tool rooms, maintenance shops, and fabrication environments will find this wheel appropriate for precision grinding of hardened steel and similar tooling materials.

This wheel is suited for bench and pedestal grinder setups as well as handheld angle grinders configured for Type 11 cup wheels. The 4-inch diameter and 80-grit medium-grade abrasive make it a practical choice for resharpening cutting tools, removing surface scale, and blending weld areas on ferrous metals in both light industrial and trade maintenance settings. The 1.25-inch arbor hole fits standard spindle configurations common in tool-room grinding equipment.

Key Features

• Ceramic Alumina abrasive for self-sharpening, consistent cut rate on hardened materials
• Vitrified bond provides rigidity and thermal stability under continuous grinding loads
• J hardness (medium grade) balances wheel life with stock-removal efficiency
• Semi-friable grain fractures to expose fresh cutting edges, reducing glazing
• Type 11 flaring cup profile for face and tool-edge grinding applications
• Non-porous structure maintains form integrity across the usable wheel life

Compatibility

Designed as an OEM-style replacement and standard aftermarket fit for angle grinders and bench grinders accepting Type 11 cup wheels with a 1.25-inch arbor bore.

Installation Notes

Installation should be performed by a qualified technician familiar with abrasive wheel safety requirements per ANSI B7.1 standards. Always power down and de-energize the grinder before mounting or removing the wheel. Inspect the wheel for cracks or chips before each use and perform a ring test on vitrified wheels as required by applicable safety codes. Never exceed the 5,730 RPM maximum speed rating marked on the wheel.