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The SDC - SECURITY DOOR CONTROLS SP50 is a 50mm spindle designed for use in door lock hardware assemblies. Spindles serve as the connecting shaft between the interior and exterior trim components of a lockset, transmitting rotational force to operate the latch mechanism. This component is sold as a single unit and is intended for installation by locksmiths, access control technicians, or commercial door hardware specialists working on lock replacement or repair projects.
The SP50 spindle is suited for lock accessory applications where a 50mm shaft length is required. It is typically used in commercial or residential door hardware servicing scenarios, including lockset replacements and trim upgrades. Installers should verify shaft length and drive geometry against the existing hardware before ordering.
Designed as an OEM-style replacement spindle for door lock hardware assemblies requiring a 50mm shaft. Verify drive profile and shaft geometry against existing lockset hardware before installation.
Installation should be performed by a licensed locksmith or qualified door hardware technician. Disengage the door from its latch and remove existing trim and chassis hardware before replacing the spindle. Confirm the spindle drive geometry matches the latch mechanism before reassembly. Refer to the manufacturer product manual for assembly sequence and hardware torque guidance specific to the lockset model.
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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