3M 7000120785 Telescoping Flange Adapter 1 in Wheel Shaft

Product Description

The 3M 7000120785 is a telescoping flange adapter designed to reduce a 1-inch bore grinding or abrasive wheel so it can be mounted on smaller-diameter shafts. The adapter accommodates shaft sizes of 1/2 inch, 5/8 inch, 3/4 inch, or 7/8 inch, making it versatile across a range of bench grinders and pedestal grinders. The adapter body spans 1 inch in length with a 1/2-inch width profile. At 0.14 pounds, it is a lightweight but purpose-built component used by maintenance technicians, metalworkers, and grinding equipment operators to match wheel bore to available shaft diameter without swapping out wheels.

This adapter is used in workshop and industrial settings where abrasive wheels with a 1-inch bore need to be fitted to grinders with shaft diameters smaller than 1 inch. Typical applications include bench grinder retrofits and equipment where shaft and wheel bore sizes do not match from the factory. The adapter is sold as a set and is intended for use alongside flat or cupped washers with a diameter equal to 1/3 the diameter of the wheel to provide proper side support and safe wheel retention.

Key Features

• Telescoping design fits shaft diameters of 1/2 inch, 5/8 inch, 3/4 inch, and 7/8 inch
• Reduces standard 1-inch wheel bore to smaller shaft sizes in a single adapter set
• Lightweight construction at 0.14 pounds
• Intended for use with flat or cupped washers sized at 1/3 the wheel diameter for side support
• Sold as a set with a minimum order quantity of one

Compatibility

Designed as an OEM-style replacement adapter for bench grinders and pedestal grinders that use abrasive wheels with a 1-inch bore and require mounting on shafts ranging from 1/2 inch to 7/8 inch in diameter.

Installation Notes

Installation should be performed by a qualified technician familiar with abrasive wheel mounting safety requirements. Always power down and disconnect the grinder from its power source before removing or installing any wheel components. Follow ANSI B7.1 safety standards for the mounting and use of abrasive wheels, including the use of proper blotter washers and side flanges. Do not overtighten the spindle nut beyond the manufacturer-recommended hand-plus-wrench procedure to avoid wheel stress.

Technical Specifications

• Wheel Bore Size: 1 inch
• Shaft Diameter Compatibility: 1/2 inch, 5/8 inch, 3/4 inch, 7/8 inch
• Adapter Width: 1/2 inch
• Weight: 0.14 pounds
• Unit of Measure: Set
• UPC: 00048011168593

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000120785