Shaft Collars
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Shaft Collars from Ruland



Ruland Shaft Collars: One-Piece Clamp Collar, Two-Piece Split Collar, Set Screw Shaft Collar, Threaded Collar, and Quick Clamp Shaft CollarRuland manufactures shaft collars in multiple styles to fit shafts ranging from 1/8" to 6" in the inch series and 3mm to 150mm in the metric series. Ruland shaft collars are available in a variety of materials and finishes including: 303 & 316 stainless steel, black oxide and yellow zinc plated carbon steel, high-strength aluminum, and engineered plastic. Each shaft collar is stamped with the Ruland name and bore size for easy identification.

Extra steps are taken in the manufacture of Ruland shaft collars to provide important performance benefits. For example, they are single point faced (indicated by the circular groove on the face) during the boring operation to insure perpendicularity of the face to the bore. This results in a face runout of TIR ≤ .002" (.05mm) on standard shaft collars with even tighter tolerances on bearing lock-nuts and special designs. Perpendicularity is important for alignment when a shaft collar is used as a load-bearing face, mechanical stop, or for mounting components such as gears or bearings.

One-piece shaft collars wrap around the shaft for even distribution of clamping forces. This results in a tight fit and greater holding power, without the shaft damage caused by set screws. Clamp collars are easy to remove, indefinitely adjustable, and work well on virtually any shaft. Ruland uses carefully selected materials and proprietary processes on its one-piece collars to ensure the clamping gap remains open for simpler and more precise adjustment, installation and fit.

Two-piece shaft collars offer the same benefits as one-piece shaft collars with additional versatility and convenience. The split design is easily installed and disassembled, reducing labor and downtime when adjustment, removal, or replacement is necessary. The two-piece shaft collar uses the full seating torque of its forged screws to apply a uniform distribution of forces around the shaft's circumference. These clamping forces provide the collar with a holding power superior to one-piece and set screw shaft collars. Ruland keeps both halves of the split collar together throughout the manufacturing process to assure a perfect match for proper fit, alignment, and holding power. This process also makes the two-piece collar more adaptable to shafts which vary a small amount from nominal size.

Threaded shaft collars and bearing lock-nuts share the same quality and benefits of their smooth bore counterparts, while providing additional features. Threaded collars provide axial holding power which is superior to smooth bore collars, while offering easier installation and adjustment than solid ring locking devices. A diverse list of thread sizes and pitches, including locknut threads, are offered. Ruland double taps each threaded collar and bearing lock nut to insure precise and burr-free threads to allow for easy installation and removal, proper fit, and extended shaft life.

Set screw shaft collars are the most effective when used on a shaft made of a material which is softer than the set screw. Ruland set collars are furnished exclusively with forged socket set screws for greater torque capacity and improved holding power. Forging of the stainless steel set screws has the additional benefit of work hardening, which results in stainless steel with elevated hardness and performance.

International series shaft collars are offered in one and two-piece styles and feature inch bores with metric outer diameters, widths and DIN 12.9 socket headed cap screws. The use of metric screws with inch bores is especially useful when either retrofitting or designing equipment with inch shafts for worldwide use. The International series shaft collar is available in bore sizes from ¼” to 3” with outside diameters from 18mm to 108mm.

Quick-clamping shaft collars are ideal for light duty or low-rpm applications that require frequent setup changes or adjustments. The handle sits flush with the outside diameter allowing the shaft collar to be precisely adjusted by hand without the need for tools. The quick-clamp shaft collar is made from aluminum and has a black anodized finish with stainless steel hardware. They do not mar the shaft.

Thin line shaft collars are designed for applications with space and weight restrictions in industries such as packaging, printing, medical, and food, and are particularly suitable for split hub componentry such as encoders. They function as clamps, positioners, guides, spacers, and stops in a smaller profile than traditional shaft collars. Two-piece styles have a balanced design for higher RPM applications. Most bore sizes are available with different outer diameter and width dimensions and screw sizes allowing the user to match space limitations and holding power with their application requirements.

Hygienic clamping assemblies are ideal for high pressure washdown applications found in the food processing, packaging, agriculture, and medical industries. The patent pending design contains a 303 stainless steel shaft collar, enclosed with a male and female shroud made from FDA compliant materials, and three O-rings with NSF compliant lubrication. Watertight seals on the shroud help to prevent particulate buildup which can lead to bacteria growth.

For additional information, read the articles "Getting a Hold on Shaft Collars" and "Improve Efficiency with Quick Clamping Shaft Collars".

Why Ruland

  • Rigid Shaft Couplings are available in carbon steel, aluminum and stainless steel.Proprietary processes developed over 75 years to ensure superior fit, finish and holding power.
  • Tightly controlled face to bore perpendicularity for proper alignment of mating components.
  • Bore size and Ruland name stamped on every shaft collar for ease of identification.
  • Proprietary black oxide process produces a fine glossy finish while increasing holding power and resisting corrosion.
  • Proprietary processes to maintain round bore geometry for tight tolerances, proper installation fit, and improved clamping forces.
  • Both halves of the two-piece collar are mated together throughout the manufacturing process for proper fit and alignment.
  • Highest grade forged screws (DIN 12.9 for metric screws) test to or beyond industry standards for maximum torque ability.
  • Available in a variety of sizes and materials including black oxide and zinc-plated steel, 303 & 316 stainless steel, engineered plastic, and high grade aluminum.
  • Aluminum shaft collars use 2024 aluminum as opposed to 6061 aluminum for increased screw seating torque.
  • Lead-free steel is standard on all steel shaft collars for weldability, environmental friendliness, and industry compliance.
  • 316 stainless hardware is standard on all 316 stainless shaft collars.


CL Shaft Collar
CL One-Piece
Inch Dimensions
MCL Shaft Collar
MCL One-Piece
Metric Dimensions
CLB - Shaft Collar
CLB Balanced
Inch Dimensions
MCL Shaft Collar
MCL International
Metric with Inch Bores
SP Shaft Collar
SP Two-Piece
Inch Dimensions
MSP Shaft Collar
MSP Two-Piece
Metric Dimensions
SPB Balanced Shaft Collar
SPB Balanced
Inch Dimensions
MSPB Balanced Shaft Collar
MSPB Balanced
Metric Dimensions
SPK Shaft Collar
SPK Keyed
Inch Dimensions
MSPK Shaft Collar
MSPK Keyed
Metric Dimensions
MSP Shaft Collar
MSP International
Metric with Inch Bores
CLH Shaft Collar
CLH Heavy Duty
Inch Dimensions
MCLH Shaft Collar
MCLH Heavy Duty
Metric Dimensions
SPH Shaft Collar
SPH Heavy Duty
Inch Dimensions
MSPH Shaft Collar
MSPH Heavy Duty
Metric Dimensions
ENCL Shaft Collar
ENCL Thin Line
Inch Dimensions
ENCL-MM Shaft Collar
ENCL-MM Thin Line
Metric Dimensions
ENSP Shaft Collar
ENSP Thin Line
Inch Dimensions
ENSP-MM Shaft Collar
ENSP-MM Thin Line
Metric Dimensions
QCL Shaft Collar
QCL Quick Clamp
Inch Dimensions
WDCL Shaft Collar
WDCL Hygienic
Inch Dimensions
MQCL Shaft Collar
MQCL Quick Clamp
Metric Dimensions
WDCL-MM Shaft Collar
WDCL-MM Hygienic
Metric Dimensions
WCL Shaft Collar
WCL Double Wide
Inch Dimensions
MWCL Shaft Collar
MWCL Double Wide
Metric Dimensions
WSP Shaft Collar
WSP Double Wide
Inch Dimensions
MWSP Shaft Collar
MWSP Double Wide
Metric Dimensions
TCN Shaft Collar
TCN Bearing Locknut
Special Dimensions
TCL Shaft Collar
TCL Threaded
Inch Dimensions
MTCL Shaft Collar
MTCL Threaded
Metric Dimensions
TSP Shaft Collar
TSP Threaded
Inch Dimensions
CL-HX Shaft Collar
CL-HX Hex Bore
Inch Dimensions
SP-HX Shaft Collar
SP-HX Hex Bore
Inch Dimensions
CLD Shaft Collar
CLD D-Bore
Inch Dimensions
SPD Shaft Collar
SPD D-Bore
Inch Dimensions
SC Shaft Collar
SC Set Screw
Inch Dimensions
MSC Shaft Collar
MSC Set Screw
Metric Dimensions

Custom Designs

As a service to our customers, we offer our vast machining experience and talents to meet special needs with custom parts. Our shop is equipped with the machines and skilled people necessary to fill all of your special requirements. If you don't see what you are looking for in our standard line, please inquire about our custom fabrication service.

Examples of Custom Work:

  • Balanced designs
  • Machined flats and mounting screws
  • Left-hand or acme threads
  • Set collars with extra screws
  • Custom bore sizes and geometry
  • Custom lengths, widths and outside diameters
  • Custom color or finish
  • Custom material and hardware requests
  • And Many Others... Please Contact Us for More Information

Custom Shaft Collars

Past Specials: (Click for image)

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Ruland Shaft Collars Bearing Lock-nut Double-Wide Shaft Collar Threaded Shaft Collar Quick-Clamp Shaft Collar Two-Piece Shaft Collar One-Piece Shaft Collar Thin Line Shaft Collar Heavy Duty Shaft Collar Set Screw Shaft Collar

Shaft Collar

Shaft Collar

Shaft Collar

Shaft Collar


Double Wide
Shaft Collar

Large Bore
Shaft Collar

Thin Line
Shaft Collar

Set Screw
Shaft Collar

Custom Designs