Shaft Collar Types: Set Screw, One-Piece Clamp, Two-Piece Clamp, and Hinge

Selecting a shaft collar for your rotating machinery is about more than just the right fit; the proper collar will enhance the performance and longevity of your equipment. With the wide variety of shaft collars on the market, each with its own unique features, benefits, and applications, it’s important to understand what sets them apart.

In this guide, we’ll help you gain an understanding of the differences between set screw, one-piece, two-piece, and hinge shaft collars, focusing on aspects like axial holding power, price, installation, accessibility, and maintenance requirements.

Selecting the Best Shaft Collar for Your Application

To choose the right shaft collar for your project, you’ll base your decision on several factors specific to your application.

Shaft Collar Types Comparison

  Set Screw One-Piece Clamp/Single Split Two-Piece Clamp/Double Split Hinge
Holding Power Low Moderate High High
Assembly and Installation
  • Requires access to the end of the shaft to slide the collar on
  • Uses only one screw for easy installation
  • Requires access to the end of the shaft to slide the collar on
  • Uses two clamp screws and allows for easy installation
  • Does not require end-of-shaft access 
  • No disassembly of machineryis necessary       
  • Offers easy installation 
  • Does not require end-of-shaft access
  • No potential for losing screws within machinery
Maintenance Minimal Minimal Minimal Minimal
Price $

Low cost




More expensive


More expensive

Set Screw Shaft Collars

This type of collar is a solid ring without relief cuts or splits. It uses a recessed screw within the collar ring that tightens directly onto the shaft. When the screw impinges on the shaft, it creates the holding power. Because of the marks this creates on the shaft surface, set screw shaft collars are best for applications in which the collar won’t require frequent adjustments. It achieves optimal holding strength when the material of the screw is harder than that of the shaft.


  • Generally simple to use
  • Economical shaft collar option


  • Less holding power compared to alternate collar types
  • Harder to adjust positioning or remove from a shaft
  • Needs shaft end accessibility to make adjustments to the clamping screw
  • Will mar a shaft
  • Limited in its application versatility

One-Piece Clamp/Single Split Shaft Collars

Utilizing a single clamping screw to compress and tighten the collar around the shaft, a one-piece shaft collar offers a secure grip without damaging the shaft surface. The screw for a single split collar clamp evenly distributes clamping force around the collar’s circumference for a uniform hold.


  • Simple to attach to and remove from a shaft with a single screw
  • Minimal maintenance needs with a “set and forget” design
  • Maintains good holding power for axial loads ranging from light to average
  • More affordable than two-piece shaft collars
  • Collar won’t mar the surface of a shaft


  • Reduced holding power as compared to two-piece shaft collars
  • Necessitates shaft end accessibility to successfully install the collar
  • Incompatible with applications that will require high axial hold.

Two-Piece Clamp/Double Split Shaft Collar

Consisting of two halves, the two-piece collar’s parts clamp around a shaft, providing a uniform grip and superior clamping force. It’s an ideal choice for applications requiring strong holding power and flexibility in placement, as well as environments that limit the accessibility of a shaft.


  • Holding power that exceeds that of one-piece collars due to using more screws
  • Better resistance to shock load than one-piece shaft collars
  • Full seating torque in clamping
  • Simple to assemble in any location along a shaft, even between additional collars


  • More parts/screws to manage when assembling
  • Priced marginally higher than single split shaft varieties

Hinge Shaft Collars

This collar variety combines the advantages of one- and two-piece collars, using a hinge to connect its two parts. You position the open collar as needed along a shaft, close it, and then use a captive clamping screw to secure it with a strong hold and an even clamp. Because the screw won’t fall out, hinge shaft collars are ideal for applications in compact spaces where it isn’t possible to hold the clamping screw in position.


  • Simple to install on shafts with or without good accessibility
  • Achieves clamping without marring the shaft
  • Hinged design with a captive clamp screw eliminates the risk of dropping or losing parts within a machine.


  • More costly than one- and two-piece shaft collars

Contact Our Experts for Premium Shaft Collar Solutions

Choosing between set screw, one-piece, two-piece, and hinge shaft collars comes down to understanding your application’s requirements. Whether you prioritize ease of installation, holding power, or cost, Stafford Manufacturing Corp. has a shaft collar to fit your needs.

We invite you to explore our extensive catalog for a look at our shaft collar offerings. Contact our team with questions, or request a quote today to start your project.

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