7721 (Type-1) Porter Cable Sander Grinder - Parts

This genuine manufacturer-approved replacement switch is specially designed for use with Porter Cable power tools. It is the part of the tool handling on/off and variable speed operations. Over time due to mechanical or electrical issue the switch may begin to fail eventually requiring replacement. Please note this durable plastic switch is sold individually.

Included in part number 879811

Included in part number 879811

Included in part number 694978

Included in part number 883219

This is an authentic replacement part that is sourced from the original manufacturer to be used with power tools. The special screw is used with several different types of equipment and the application of the screw can vary based on the model of the tool. This screw is sold as an individual replacement part, please see illustrated diagram for part location and usage.

This is a genuine replacement part sourced from the original manufacturer for use with woodworking power tools. The metal screw is used with several different types of equipment, and the application of the screw can vary based on the model of the tool. This screw is available as an individual replacement part, please see model diagram for associative parts.

O-rings are designed to contain thousands of pounds of pressure by creating a seal between two or more parts. O-ring measurements are defined by the inside diameter and the thickness. There are many causes for O-Ring failure, such as pressure, friction, temperature or chemicals. The most common are: • Extrusion and Nibbling ...Read more - O-ring has ragged, tattered edges. These are commonly caused by pressure spikes which shear off tiny "bites" from the o-ring, or caused by clearance gaps. • Abrasion - One or both sides of the o-ring appear rough and slightly flattened. Commonly caused by a contact surface that is too rough, contains grit or is too smooth to allow lubrication. • Over Compression - O-ring is flattened on both sides and may have a "ring" split along its length. Commonly caused by excessive pressure or heat. • Heat Hardening - O-ring has a pitted or cracked surface, and often is flattened on both sides. Caused by temperature exceeding o-ring capacity. • Weather/Ozone Cracking - O-ring is covered in small surface cracks. Caused by exposure to ozone, UV rays and air pollution. Excessive seal stretching causes similar cracking.