48K531 - Walter Grinder Mounting Flange Washer

Secure Mounting for Precision Grinding

The Walter Butting Washer (48K531) is a critical component for the safe and effective assembly of abrasive tools on angle grinders. In the world of industrial metalworking, the connection between the power tool and the abrasive media is where performance meets safety. This specialized washer acts as a precision spacer and mounting flange, designed to sit at the base of the grinder's spindle. Its primary function is to provide a flat, stable surface for backing pads and abrasive discs to rest against, ensuring they do not interfere with the grinder's gear housing or bottom out on the spindle threads before being fully tightened.

Manufactured by Walter Surface Technologies, a leader in surface treatment solutions, this butting washer is engineered from high-quality hardened steel. This construction ensures that the washer maintains its shape and flatness even under the intense torque and heat generated during heavy-duty grinding and sanding operations. Unlike generic washers that may warp or compress, the 48K531 maintains rigid structural integrity, which is vital for minimizing vibration. Excessive vibration not only leads to poor surface finishes but can also cause premature wear on the grinder's bearings and increase operator fatigue.

Using the correct mounting hardware is often overlooked but is essential for compliance with safety standards. An improperly mounted backing pad can slip, wobble, or even detach during operation, posing significant risks to the operator. The Walter 48K531 is specifically designed to interface seamlessly with Walter's range of backing pads and abrasive systems, providing the peace of mind that comes with using OEM-specified hardware. Whether you are using resin fiber discs, flap discs, or surface conditioning non-woven pads, this washer ensures that the torque transfer from the motor to the abrasive is efficient and direct.

Installation is straightforward, fitting standard 5/8"-11 spindles found on most North American angle grinders. It is an indispensable accessory for fabricators, welders, and maintenance professionals who demand reliability from their equipment. By ensuring the correct offset and secure clamping pressure, the Walter Butting Washer extends the life of your backing pads and helps you achieve consistent, high-quality results on every job.