Sherex TEC Series Wedge Pair Lock Washers
What are Sherex TEC Series wedge pair lock washers? Sherex TEC Series wedge pair lock washers are a pair of alloy steel washers with cams on one side and radial teeth on the other, glued cam-to-cam. Unlike friction-based lock washers, they secure a joint using tension, with a wedge effect that resists even severe vibration.
How do wedge pair lock washers work?
TEC Series washers come as a glued pair, each with radial teeth on the outer faces and cams between them. On installation, the teeth seat into the bolt or nut on one side and the joint surface on the other, so any loosening movement is forced into the cams between the two washers. Because the cam angle is greater than the bolt's thread pitch, the cams wedge apart rather than allow rotation, which maintains clamp load and keeps the joint secure. This tension-based locking is far more effective than the friction of a split ring under heavy vibration, and TEC Series washers are tested on the Junker vibration machine, the most severe bolted-joint vibration test. Made from alloy steel, they are typically reusable if inspected for wear.
Why choose Sherex TEC Series wedge pair lock washers
- Tension not friction: cams wedge apart to hold clamp load.
- Severe vibration proof: Junker-tested for the toughest joints.
- Reusable: usually reusable when inspected for wear.
- Alloy steel: strong construction in inch and metric sizes.
Common applications for wedge pair lock washers
- Heavy vibration and shock-load joints
- Engines, machinery, and transport equipment
- Structural and safety-critical connections
- Joints where standard lock washers fail
For lighter-duty vibration resistance, see split ring lock washers, and browse every option on the main lock washers category.
Sherex TEC Series Wedge Pair Lock Washers FAQ
How are wedge lock washers different from split ring washers?
Wedge pair washers use tension, not friction. The cams between the pair wedge apart when the joint tries to loosen, holding clamp load, which resists far heavier vibration than a split ring.
Are TEC Series washers reusable?
Usually yes. Inspect the pair for deformation or excessive wear before reuse, and discard if worn or damaged.
When should I not use them?
They are not recommended for mating surfaces that are not locked in place or that are harder than the washers, since the teeth need to seat.