D-bore couplings for secure torque transmission on D-shafts

Ruland has introduced D-bore couplings designed to engage directly with D-profile shafting to prevent slippage in critical motion-control applications such as semiconductor equipment, medical devices, and factory or warehouse automation systems. The couplings are available in disc, jaw, bellows, and oldham styles, allowing engineers to select the coupling type best suited to their application requirements.

D-bore couplings provide a secure mechanical connection by mating directly with the flat on a D-shaft. Unlike set screw connections that may loosen or slip on small shafts, D-bore couplings engage directly with the shaft profile to provide secure torque transmission. Traditional set screw connections can also be difficult to install reliably on smaller shafts where the screw may not seat properly on the D-profile and may loosen due to vibration or improper installation.

These couplings are particularly useful on shafts under 7 mm where standard keyways are unavailable. By eliminating the need for secondary shaft machining while improving shaft engagement, D-bore couplings simplify assembly and improve reliability in compact motion control systems.

Ruland D-bore couplings are available with bore sizes ranging from 3 mm to 10 mm and are manufactured from aluminium for lightweight performance and low inertia. Clamp and set screw hub configurations are available depending on the coupling style.

Ruland manufactures its couplings in its Marlborough, MA, USA, advanced manufacturing facility from meticulously selected North American bar stock using proprietary manufacturing processes. All couplings are RoHS3-, REACH-, and Conflict Minerals-compliant.

For complete specifications, CAD models, and ordering information, visit www.ruland.com.

Summary:

Direct D-shaft engagement prevents slipping in critical applications
Available in disc, jaw, bellows, and oldham coupling styles
Ideal for shafts under 7 mm where keyways are not available
Carefully made in Ruland’s advanced manufacturing facility
Available for immediate delivery
RoHS3, REACH, and Conflict Minerals compliant

About Ruland:

Ruland Manufacturing Co., Inc. is a privately owned family company founded in 1937. Ruland has carefully and responsibly manufactured high performing shaft collars, rigid couplings, and motion control couplings for the past 40 years. Ruland’s product line was recently expanded to include a variety of machine components from select manufacturers that align with Ruland’s performance and quality standards.

UK distributor:

Acorn Industrial Services Ltd.

Unit A, Denby Way, Hellaby Industrial Estate

Rotherham S66 8HR

Phone 0800 8766 441

E-mail enquiries@acorn-ind.co.uk

Internet www.acorn-ind.co.uk/ruland

Contact in the USA:

Ruland Manufacturing Co., Inc.

6 Hayes Memorial Drive

Marlborough, MA 01752, USA

Phone +1 508 485 1000