694081 Porter Cable Electric Drill - Overview

Included in part number 882350

This is a genuine replacement part sourced directly from the manufacturer. The preload spring is commonly found in power tools from Porter Cable, DeWALT, and Black & Decker, such as routers, drills, laminate trimmers, and saws. This part is made of metal, and is used to provide tension to the bearing that allows the armature assembly to...Read more spin freely. You may require a screwdriver when replacing this item. The preload spring is sold as an individual replacement part.

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.