Shaft Collars for Machine Tools

Ruland Manufacturing Co., Inc.
April 2017

Oldham Couplings for Actuator Driven Systems

Ruland manufactures over 2,500 standard shaft collars to
match the varied needs of machine tool manufacturers.

Marlborough, MA - Machine tool manufacturers require round bore, threaded, and bearing locknut type shaft collars to meet the diverse needs of mills, lathes, bar feeders, coilers and other CNC controlled equipment. Ruland clamp style shaft collars are manufactured from select materials, have fine finishes, high holding power, and precise face to bore perpendicularity making them ideal for the demands of machine tools.

Clamp style shaft collars can be used for guiding, spacing, stopping, mounting, and component alignment. They are superior to set screw shaft collars as they do not mar the shaft, are easy to install and adjust, and have significantly higher holding power. Ruland two-piece clamp style can be serviced in-place, offer increased holding power, and are mated throughout the manufacturing process for proper fit and alignment. Machine tool manufacturers benefit from the tightly controlled face to bore perpendicularity of Ruland shaft collars (TIR ≤ 0.002” or 0.05mm) which is critical when they are used as a load bearing face or for aligning components such as bearings or gears. Ruland identifies this work surface with one or two circular grooves on the face of the shaft collar to assist in installation and design.

Threaded shaft collars and clamp type bearing locknuts are common on lathes, mills, and other equipment that require higher axial holding power. Ruland manufactures them with double tapped burr-free threads allowing for smooth installation and removal, proper fit, and extended shaft life. Bearing locknuts are designed to fit AFBMA standard shafting and utilize a clamp style design for high holding power. They have more precise face to bore perpendicularity of (TIR ≤ 0.0005”) to accommodate the needs of high precision spindle bearings.

Ruland shaft collars are made from bar stock sourced from select North American mills and carefully manufactured in our Marlborough, MA factory. Fastening hardware tests beyond industry standards for maximum torque capabilities and holding power. The Ruland name and bore size are stamped on every shaft collar for ease of identification.

Established in 1937, Ruland focuses on the design and manufacture of high performing shaft collars and couplings. All products are carefully manufactured in Marlborough, Massachusetts under strict controls using proprietary processes. 3D CAD files, full product specifications, and additional technical information, are available at

Product Link: Shaft Collars

Article Summary
• Accommodate high amounts of parallel misalignment with low bearing loads for increases system performance
• Balanced design reduces vibration at high RPM
• Disks available in three materials for a wider range of performance characteristics
• RoHS2 and REACH compliant
• Carefully made in our Marlborough, Massachusetts factory and available for immediate delivery

Ruland Manufacturing Co., Inc.

PR Contact:
TPR International

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