This Spur Gear is a genuine Stihl OEM component for the HS45 hedge trimmer (HS45/HS 45). It is a precision-moulded, durable engineered polymer gear with straight-cut teeth designed to transfer drive reliably within the hedge trimmer gearbox. Replacing a worn or damaged gear restores smooth power transmission to the cutter mechanism and helps maintain consistent trimming performance. Built to Stihl factory specifications, it offers the correct tooth profile and fit for dependable operation. Supplied under Manufacturer Part Number (MPN) 4228 640 7505, it is a direct replacement part that supports the reliability and lifespan of your machine. Suitable for both domestic and professional users who want to keep their HS45 running efficiently with genuine parts.

Key Features:
– Genuine Stihl OEM part for exact fit and compatibility
– Precision-moulded polymer teeth for smooth, consistent meshing
– Restores reliable power transfer to the cutter mechanism
– Hard-wearing material designed to withstand regular use
– Helps reduce premature wear in the gearbowhen replaced on time
– Fits without modification when installed per Stihl service guidance
– Suitable for routine maintenance or repair after gear wear or damage
– Supports long service life when paired with correct lubrication and care

Typical Applications:
Used to replace a stripped, chipped, or worn drive gear in Stihl HS45 hedge trimmers during routine servicing or after impact loads, heavy use, or contamination. Ideal for homeowners, landscapers, grounds maintenance teams, and hire fleets aiming to keep hedge trimmers operating smoothly and safely through the season, with consistent blade drive and dependable cutting performance.

Also known as:
Drive gear, gearbospur gear, cutter drive gear, transmission gear, gear wheel, HS45 drive gear, replacement gearbogear, straight-cut gear, power transfer gear.

Fits Models:
HS 45, HS45

Alternate Part Numbers:
4228-640-7505, 42286407505

Product Specifications