Threaded Shaft Collars


Threaded shaft collars share the same performance and benefits as their round bore counterparts while providing additional features. Threaded shaft collars with set screws have higher axial holding power than round bore collars while offering easier installation and adjustment than solid ring locking devices. A diverse list of acme, right-hand, and left-hand thread sizes and pitches are offered. Double taps each threaded collar to ensure precise and burr-free threads, allowing for easy installation and removal, proper fit, and extended shaft life. The threaded shaft collar is manufactured in 1215 lead-free steel with a black oxide finish and 303 stainless steel. Bore sizes range from 1/8″ to 2-1/4″ and 4mm to 30mm.

Threaded Shaft Collars Dimensions

Bore B
5/8 in – 10 TPI
Outer Diameter OD
1 5/16 in
Width W
 -40°F to 350°F
-40°C to 176°C
Hex Wrench Size
Width Tolerance
 +.003 in / -.010 in

Types of Threaded Shaft Collars

There are several different types of collars that can be installed in various ways. Most of them are designed to meet different strengths and needs. Some of these include clamp-on styles that enable higher compression and prevent shaft damage. The clamping ring also provides a better fit, enhanced retention, and easy adjustment. However, the clamp ring does sacrifice removal ability.

There are two types of threaded collars: clamping and set screws. They can be mounted radially or axially on the shaft. Clamp styles are best for constant loads. The clamping ring locks into place by distributing force and friction on the shaft.

Shaft Collars Application

Shaft collars can be used for almost any application. They are commonly found in gearboxes, electric motors, and transmission applications. They are essential components in most machines. They are easy to install and maintain and can be customized to fit almost any application.
Always consult a professional when selecting a collar. They will help you choose the collar that best suits your needs. The selection process also includes the axis type. A shaft with a large bore will not provide sufficient clamping force.
Solid collars are the most common type. They are usually made of mild steel. They are also available in galvanized versions for even more protection from corrosive elements. They are less expensive than titanium collars but have lower holding power.