Product Overview

• Similar to a shaft’s shoulder when it is clamped into place. However, the split collar is less expensive than machining a shoulder and can be easily relocated.
• As a clamping mechanism over a split hub. The clamping power is transmitted from the collar to the hub-shaft interface. A common method of connecting components to a shaft is the self-centering split-hub design.
• As a torque-transmitting component. Split collars can transmit torque when other torque-inducing components (such as lever arms, pulleys, or sprockets) are attached to the collars.

• High Strength – our most popular style, where the heads of the clamping screw are recessed.
• Low Profile – this style has a smaller outside diameter but the screw head does protrude slightly beyond the outside diameter.
• Heavy Duty – have larger clamping screws and a greater outside diameter for superior holding capacity.

1. Heavy Duty shaft collars have twice the Torsional Holding Power of standard collars
2. Heavy Duty Rigid Couplings have three times the Torsional Holding Power of regular couplings. They are also longer and have more screws than regular couplings.

For more information, visit our Collar and Coupling Styles page.

One-piece split clamp-type collars have a single screw and do not come apart. They are used when there is access to the end of the shaft, whether on hard or soft standard round shafts, thin wall tubes, or over a split hub. This type of collar offers more axial holding power compared to set screw types. One-piece split clamp-type collars are available in the following materials:

• Steel
• Stainless steel
• Aluminum
• Nylon
• Delrin

Other features and benefits of this collar type include:

• Precision machined
• Non-marring
• Easy to adjust
• High clamping power
• Available in three different styles: high strength, low profile, and heavy duty

These collars have two screws and can be disassembled. They function in applications where there is no access to the end of the shaft, which must be 0.015” or more under nominal diameter. Compared to one-piece split clamp-type collars, two-piece split clamp-type collars offer about 10% more holding power.

Stafford’s exclusive hinge-type shaft collars are ideal for applications requiring fast operation, such as hostile conditions or applications with limited space and time. They combine the flexibility of a two-piece collar with the simplicity of a one-piece collar. Other features and benefits include:

• Versatility: They can be assembled as a single unit anywhere on the shaft, eliminating loose parts that could be dropped or lost.
• Compatibility: Hinge-type collars are suitable for soft or hard standard round shafts, thin wall tubes, or over a split hub.

These couplings can handle more torque than set screw couplings and are used where there is access to the end of the shaft. They can join shafts of the same or different diameters, with or without keyways. Other benefits and features include:

• Available with stepped or smooth straight-through bores, which protect the shaft from damage
• Zero backlash
• Available in three styles: heavy duty, high strength, and low profile

The two-piece clamp-type coupling lets two aligned shafts function as one. They are used where there is no access to the end of the shafts, which can be of different diameters and with or without keyways. Made of two pieces, two-piece rigid couplings make assembly and adjustment simple. Other features and benefits are:

• No backlash
• Smooth bore protects the shaft from damage
• Straight-through or stepped bores are available
• Available in high-strength, low-profile, and heavy-duty designs

The three-piece split clamp-type coupling is designed to allow two aligned shafts to function as one. It can be fixed to one shaft while the other is moved or changed, or it can be completely disassembled for convenient assembly and adjustment. Other features include:

• Smooth straight-through bores protect the shaft from damage 
• Precisely machined
• Non-marring
• High clamping power
• Can be installed anywhere on the shaft
• No backlash

Our precision sleeve coupling with Accu-Clamp™ design is a Stafford-exclusive product that includes integral self-centering clamping collars at both ends, a solid center section that offers a close tolerance fit on ground shafting, and a keyway.

To guarantee accurate shaft alignment, it maintains <0.001” TIR concentricity while in use. It is precisely machined, non-marring, and has a high clamping power. The precision sleeve coupling also:

• Connects two shafts with no backlash.
• Features a smooth bore that protects shafts from damage.

UNF/UNC one-piece threaded collars are utilized on standard UNF/UNC threaded shafts. They offer greater holding power compared to set screw type collars. They are also:

• Precision machined
• Non-marring
• Easy to adjust

UNF/UNC two-piece threaded collars are applied to standard threaded shafts, either UNF (fine thread) or UNC (coarse thread). They can be completely disassembled and installed anywhere on the shaft. Other benefits include:

• Precision machined
• Non-marring
• Higher clamping power compared to set screw type collars
• Available in high strength and low profile designs

Stafford’s exclusive hinge shaft collars are ideal for situations requiring rapid operation, such as hostile environments or applications with limited space and time. Hinge shaft collars are two-piece collars that can be used on standard round shafts, hard or soft, as well as thin wall tubes or over a split hub.

They are simple to assemble, reposition, and disassemble, with no loose screws or fumbling. Hinge shaft collars offer the same axial holding power as standard collars. They have a smooth bore that won’t mar shafts. Other features include:

• Compatible with standard UNF/UNC threaded shafts
• Can be positioned anywhere on the shaft
• Superior to set screw collars in terms of holding power
• Available in high strength and low profile designs

The One-Piece Split Clamp offers superior holding power over set screw collars. It is ideal for applications such as stroke limiting, stops, and height and spring tension.

The 2-Piece Clamp-Type design allows the collars to be completely disassembled and placed anywhere on a shaft to simplify installation and relocation of the collar.

Stafford metric shaft collars are completely metric, including the clamping screws. One-piece clamp-type shaft collars are intended to be used on standard round shafts, both hard and soft, as well as thin wall tubes or over a split hub. Other features include:

• Precision machined
• Strong clamping force
• Smooth bores that protect the shaft from marring
• Better holding power than set screw collars 

Metric one-piece split clamp collars are stocked in:

• Steel
• Stainless steel

Stafford metric shaft collars are fully metric, down to the clamping screws. Two-piece clamp-type collars are intended to be used over split hubs, thin wall tubes, and standard round shafts, both hard and soft. They are capable of being completely disassembled and installed anywhere on a shaft. Other benefits include:

• Precision machined
• Non-marring
• Strong clamping force
• Shafts are protected from damage by a smooth bore
• Superior to set screw collars in terms of holding power

Metric two-piece split clamp collars are stocked in:

• Steel
• Stainless steel

These two-piece clamp-type shaft collars with set screws are designed to be used on standard round shafts. They can be completely disassembled and installed anywhere on a shaft. Features include:

• Precision machined
• Easily adjustable
• High clamping force
• Low profile style

These metric products are stocked in steel and stainless steel, but other materials are available as custom designs.

Our metric hinge shaft collars are fully metric, including the clamping screws. They combine the flexibility of a two-piece collar and the ease of a one-piece, with a triple-link hinge and captive screw in one unit.

Exclusive to Stafford, hinge shaft collars are ideal for situations requiring fast operation, such as hostile environments or situations with limited space and time. Hinge shaft collars are two-piece collars that can be used on standard round shafts, hard or soft, as well as thin wall tubes or over a split hub.

They are simple to put together, adjust, and disassemble, preventing wasted time from fumbling or lost screws. Hinge shaft collars offer the same axial holding power as standard collars. They have a smooth bore that won’t scratch shafts.

Metric hinge shaft collars are stocked in:

• Steel
• Stainless steel

Stafford metric rigid shaft couplings are fully metric, right down to the clamping screws. The one-piece clamp-type coupling is designed to allow two aligned shafts to function as one. Metric clamp-type couplings with straight-through bores are available. 

Other features include:

• Precision machined
• Non-marring
• High clamping power
• No backlash
• Shafts are protected from damage by a smooth bore
• Superior torque capacity compared to set screw couplings

These products are stocked in steel and stainless steel.

Stafford metric rigid shaft couplings are fully metric, right down to the clamping screws. The two-piece clamp-type coupling connects two aligned shafts and allows them to function as one. This coupling detaches completely for the most convenient assembly and adjustment. Metric clamp-type couplings with straight-through bores are available. 

Other features include:

• Precisely machined
• Non-marring
• High clamping power
• No backlash
• Shafts are protected from damage by a smooth bore.
• Superior torque capacity compared to set screw couplings

These products are stocked in steel and stainless steel.

The three-piece clamp-type coupling is designed for two aligned shafts, allowing them to function as one. It can be fixed to one shaft while the other is moved or changed, or it can be completely disassembled for the most convenient assembly and adjustment. Metric three-piece clamp-type couplings with straight-through bores are available.

Other features include:

• Precision machined
• Non-marring
• High clamping power
• Zero backlash
• Smooth bore protects shafts from damage

These products are stocked in steel and stainless steel.

Browse our Metric Accu-Flange™ Shaft Mounting Collars product page.

Face mounting shaft collars have universal tapped mounting holes that allow for a variety of component mounting possibilities. One-piece clamp-type shaft collars can be used on hard or soft standard round shafts, as well as thin wall tubes or over a split hub. We stock these items in steel materials. Additional features include:

• Precision machined
• Non-marring
• Strong clamping force
• Smooth bore protects shafts from damage
• Superior to set screw collars in terms of holding power

The Grip & Go™ Metric Thread Quick Release Clamping Handle replaces the clamp screw in any metric clamp-type shaft collar, allowing for quick repositioning without the use of a wrench. The OD is knurled for a secure grip.

It is ideal for situations where clamping collars must be adjusted frequently along a shaft. The handle can make linear modifications to a feed mechanism, alter stroke length or table height, and position a test instrument. This clamping handle is not designed for use in rotary applications.

We stock the Grip & Go™ Metric Thread Quick Release Clamping Handle in:

• Steel
• Stainless steel
• Aluminum