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The VALUE COLLECTION 30858 is a one-piece clamp-style shaft collar machined from steel, designed to secure, locate, or limit the movement of components along a rotating shaft. With a 1.75-inch outside diameter and a bore diameter of 1 inch, this collar fits standard 1-inch shafts and provides a reliable mechanical stop or positioning reference. The clamp design allows the collar to be installed or repositioned without disassembling the shaft assembly, making it a practical choice for maintenance and production applications. Each package contains 2 collars. This part is typically installed by mechanical maintenance technicians, industrial assemblers, and millwrights.
Clamp shaft collars like the 30858 are used across a wide range of light and medium industrial applications including conveyor systems, pump assemblies, motor drive shafts, and general power transmission equipment. The one-piece clamp body wraps around the shaft and tightens with a fastener, distributing clamping force evenly without creating the stress concentrations associated with set-screw designs. This makes the collar suitable for use on shafts where surface finish or shaft integrity is a concern.
Designed as a standard clamp-style shaft collar for use on 1-inch diameter shafts in general-purpose industrial and mechanical power transmission applications.
Installation is performed by mechanical maintenance personnel or millwrights. Ensure the shaft is de-energized and all rotating equipment is fully locked out and tagged out before handling or positioning the collar. Clean the shaft surface before installation to remove oils or debris that could affect clamping force. Tighten the clamp fastener to the hardware manufacturer's specified torque using appropriate hand tools.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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