Miniature Rigid Couplings have bore sizes as small as 3 mm.

Press Release Summary:

Available in aluminum, carbon steel, or stainless steel, miniature rigid couplings are suitable for micro component applications without misalignment, including connecting line-shafts, attaching motor to gearbox, and servo applications. Bores are precision honed in manufacturing process, assure tolerance of +.05/-.00 mm. Couplings are come in one-piece clamp style, two-piece clamp style and set screw style versions, with or without keyways. Units feature Nypatch socket head cap screws.

Original Press Release:

Miniature Rigid Couplings Down to 3 mm Bore Size

Marlborough, Massachusetts, October 2009. Ruland now offers miniature rigid couplings with bore sizes as small as 3 mm. Miniature rigid couplings are suitable for micro component applications where misalignment is neither present nor desired, including connecting line-shafts, attaching a motor to a gearbox, and servo applications. Offering high torque capacity, stiffness and zero backlash, Ruland's rigid couplings are increasingly being used in precision motion control applications where misalignment is tightly controlled.

Ruland's miniature rigid couplings are available in aluminum, carbon steel or stainless steel. The bores of the couplings are precision honed in the manufacturing process, assuring tolerances of +.05/-.00 mm. This enhances the overall performance of the couplings, especially important for applications that require strict control of shaft alignment and greater torque transmission ability. All rigid couplings from Ruland have Nypatch socket head cap screws for increased performance and reliability. This coating is designed to reduce screw vibration, which can cause the screws to loosen and torque transmission ability to diminish during the course of normal use.

Rigid couplings are available in one-piece clamp style, two-piece clamp style and set screw style versions, with or without keyways. A large number of standard sizes are available in straight and step bore combinations to fit shafts ranging from 1/8" to 2" in the inch dimension series and from 3mm to 50mm in the metric dimension series. Inch to metric conversion couplings are also available by special order.

Rigid couplings are part of Ruland's product line which also includes shaft collars and five types of zero-backlash motion control couplings including beam couplings, bellows couplings, oldham couplings, jaw couplings and miniature disc couplings.

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Company Information:

Ruland Manufacturing Co., Inc. was established in 1937 and has made a variety of precision products including the valve that pressurized the spacesuit of the first American to walk in space. Ruland's focus for the past 40 years has been on high performing shaft collars and couplings. The complete line of products includes shaft collars and rigid couplings, and a full line of motion control couplings: beam couplings, bellows couplings, oldham couplings, miniature disc couplings and zero backlash jaw couplings.


Ruland Manufacturing Co., Inc.

6 Hayes Memorial Drive

Marlborough, MA 01752

Phone 508 485 1000

Fax 508 485 9000



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