Bosch F016A57635 — Rear roller ring gear / roller drive assembly: a direct-fit replacement gear that restores positive drive to the rear roller on cylinder-style petrol mowers, correcting slipping or damaged teeth and returning smooth, even roller rotation.

Common applications: listed for Qualcast Classic Petrol 35S and Classic Petrol 43S and referenced for a range of Atco Balmoral models (14S/14SE/14SK/17S/17SK/20S etc.), and Bosch Petrol Cylinder 14SK and related Suffolk Punch/Allett rear-roller systems;

Supplied as the single ring-gear/roller-drive unit you need for a clean replacement of the rear-roller drive assembly — an essential original Bosch part to keep older cylinder mowers running reliably. This is a practical, ready-to-install option when you’re sourcing specific power tool parts for mower repair, and it’s one of the Bosch power tool parts commonly called out on parts diagrams for the models above.

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