Sherex's TEC Series® and Disc-Lock brand of wedge locking washers and nuts utilize tension, rather than traditionally-used friction, to secure fastened joints in high vibration and load applications. This results in secure joints that are unable to loosen through vibration. Our wedge-locking washers are used in a variety of vibration intensive industries and can even be found to be useful around the house to secure those pesky nuts and bolts that need to be retightened every so often.
How Locking Washer Technology Works
TEC Series and Disc-Lock Washers are offered in glued pairs; each washer has a cams on one side and radial teeth on the other side. The cam sides are glued together. During installation, the radial teeth cause half of the washer to be seated to the bolt or nut, and half to be seated to the base material.
When the joint is exposed to heavy load or vibration, the bolt or nut will attempt to loosen. Because the TEC Series or Disc-Lock washer’s radial teeth are seated to the base material and the bolt or nut, the loosening movement is forced into the cams between the washer pair.
Because the cam angles are greater than the thread pitch, a wedge effect is created by the cams, preventing the bolt or nut from rotating loose.
How Locking Nut Technology Works
Disc-Lock Nuts are two and three piece nuts that utilize the same cam wedge locking technology: when the joint is subjected to heavy shock or vibration, the interlocking cams create a wedge effect because the cam angles are greater than the thread pitch, securing the joint.