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The VALUE COLLECTION 40171 is an oversized key stock made from steel with an unfinished surface finish. Key stock is a precision-cut bar used in mechanical drive assemblies to lock rotating components — such as pulleys, gears, and sprockets — to a shaft, preventing relative rotation under load. This piece ships as a single unit and is sized in the oversized category, making it suitable for applications where standard key stock dimensions are insufficient. Machinists, millwrights, and maintenance technicians commonly work with key stock during equipment assembly, repair, or replacement of drive components.
Oversized key stock is used across a wide range of industrial and mechanical maintenance applications, including pump and motor shaft assemblies, conveyor systems, and general power-transmission equipment. The unfinished surface allows for on-site fitting, filing, or machining to achieve the required tolerance for a given keyway. It is appropriate for both light-duty and moderate-load drive assemblies where a keyed shaft connection is specified.
Designed as a general-purpose oversized key stock for use in mechanical shaft and keyway assemblies across industrial and commercial power-transmission applications.
Installation is typically performed by a machinist or millwright. Always de-energize and lock out the equipment before servicing any shaft or drive assembly per applicable OSHA lockout/tagout procedures. Key stock should be fitted to the keyway with appropriate hand tools and verified for proper seating before reassembling the drive component. Do not force-fit key stock that requires excessive material removal, as this can affect keyway integrity.
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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