1B8745 Key-Woodruff Fits Caterpillar Models
1B8745 Key-Woodruff Fits Caterpillar Models
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One New Aftermarket Replacement Woodruff Key for Caterpillar (Cat) Equipment
This aftermarket replacement Woodruff Key (part number 1B8745) is a precision-machined, semicircular steel key used in Caterpillar engine and drivetrain assemblies. The Woodruff key seats into a matching semicircular keyway in the shaft, with the flat edge engaging a longitudinal slot in the mating gear, hub, or pulley hub. This design locks the rotating component to the shaft, preventing independent rotation while also acting as a mechanical fail-safe that protects costlier components from damage under overload conditions. It is a direct aftermarket replacement for the Caterpillar OEM part number 1B8745 / 1B-8745.
Compatible Models
Caterpillar (Cat): Verify fitment against your machine serial number and parts manual. Contact us with your serial number if you need fitment confirmation before ordering.
Replaces Part Number(s):
1B8745, 1B-8745
New aftermarket replacement part - not remanufactured, not used.
