Shaft collar

An adjusting ring is produced from a mechanical cast or forged iron ring, which is made fittable to a shaft and is mounted thereon by one or more screws.

The fact that the collar is based against other machine parts, bearings, etc., it keeps the shaft or moving parts on a shaft in a certain position. The screws are countersunk arranged in order to avoid accidents.

Collars as a closure system for weight plates

Collars are several centimeters large pieces of pipe with a screw. The pipe sections are drawn over the barbell and fixed by a screw. The screws exist roughly two variants: Allen and locking toggle bolts. The Allen screws wear out quickly. The advantage of the collars is that they securely fasten the plates on the barbell.

• Engineering