New from Ruland: Left Hand Threaded Shaft Collars

Ruland Manufacturing Co., Inc.
July 24, 2018

Oldham Couplings for Actuator Driven Systems

All Ruland threaded bore shaft
collars have double tapped threads
for better fit and smooth installation
in high axial load applications.

Marlborough, MA – Ruland has expanded its offering of threaded shaft collars by adding inch and metric left hand threaded styles to give designers more flexibility to work with standard off the shelf components. They are available in one- and two-piece clamp styles in steel and stainless steel with bore sizes ranging from 1/8” to 2-1/4” inch and 4mm to 30mm.

Left hand threaded shafting is commonly used to reduce the risk of components coming loose in rotating applications and as a safety measure to prevent the unintended removal of critical components. Ruland manufactures left hand threaded shaft collars in one- and two-piece styles to meet the needs of equipment manufactures. Threaded shaft collars are designed to provide higher axial holding power than round bore collars of comparable size. They are well suited for guiding, spacing, stopping, mounting, and component alignment in industries such as packaging, printing, semiconductor and solar. Two-piece type allows for simple installation or disassembly without the need to remove adjacent components.

Oldham Couplings for Actuator Driven Systems

Left hand threaded shaft collars are
available in one- and two-piece clamp style
with inch and metric bore sizes available
from 1/8” to 2-1/4” (4mm to 30mm).

Ruland double taps threads to ensure a precise and burr-free finish allowing for easy installation and removal, proper fit, and extended shaft life. Equipment 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. Forged screws test beyond industry standards to ensure maximum holding power.

Left hand threaded collars are manufactured from 1215 lead-free steel with a proprietary black oxide finish and 303 stainless steel with hardware of like material. Ruland shaft collars are machined from bar stock sourced exclusively from North American mills and carefully manufactured in our Marlborough, MA factory to ensure product consistency. All Ruland products are RoHS3 and REACH compliant.

Full product specifications including free downloadable CAD files, installation instructions with videos and application examples can be found at

Why Ruland threaded shaft collars?

  • Complete line of left hand threaded shaft collars allowing designers to work with standard components.
  • Double tapped threads for easy installation and repositioning.
  • Fastening hardware performs above industry standards for maximum torque capabilities and holding power.
  • RoHS3 and REACH compliant.
  • Carefully made in our Marlborough, Massachusetts factory and available for immediate delivery.

Product Link: Threaded Shaft Collars


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