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Left-hand Threaded Shaft Collars

Engineers looking for left-hand threaded shaft collars now have a new supplier: Ruland had added them in metri and inch sizes to it offerings. This will give designers more flexibility to work with standard off the shelf components.

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. Threaded shaft collars 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.

The Ruland collars are available in one- and two-piece clamp styles in steel and stainless steel with bore sizes ranging from 1/8 inch to 2-1/4 inches and 4 mm to 30 mm. The collars have double tapped threads to ensure a precise and burr-free finish which make for easy installation and removal, proper fit, and extended shaft life. The face-to-bore perpendicularity is precise (TIR ≤ 0.002 inch or 0.05 mm) which is critical when they are used as a load-bearing face or for aligning components such as bearings or gears. Forged screws used to secure the collars test beyond industry standards to ensure maximum holding power. The collars are made from 1215 lead-free steel with a proprietary black oxide finish and 303 stainless steel with hardware of like material. They are machined from bar stock sourced exclusively from North American mills and carefully manufactured in Massachusetts to ensure product consistency. They are RoHS3 and REACH compliant. Full product specifications including free downloadable CAD files, installation instructions with videos and application examples can be found at the company’s website.

Ruland,, 508-485-1000

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