Big flake back wheel

The big flake rear wheel sits at the turning point at the rear end of the flake chain; the chain passes around it on the return run and then re-enters the grate surface. We supply the rear wheel together with the adjacent front wheel, chain, bearings and other spare parts.

Role of the rear turning end

A flake-type chain grate uses interlocking flake grate plates to form a continuous grate surface; chain links and pin shafts join the flakes into an endless chain, and the front wheel and rear wheel support and turn it at both ends. The big flake rear wheel takes the chain tension on the return side, and as the wheel surface wears the chain pitch fit becomes looser. This part belongs to the same area as the back bearing and big pin shaft and is usually serviced together with them.

Material and typical service life

Cr25Ni20 cast alloy steel is the common choice for wheel sets and chain-link parts, and other grades can be customised for high-temperature sections. The specifications of adjacent parts quoted by the partner factory are as follows:

Production and inspection

The rear wheel is made to OEM dimensions and tolerances, with precision casting and machining to ensure proper meshing and alignment. Before delivery, material composition analysis, dimensional verification and performance testing are completed, and the product meets technical standard NB/T 47050-2016.

Supply arrangements

The rear wheel ships from the partner factory. We can provide selection advice and matching spare parts, with dimensions and material customised after confirmation against the customer’s original machine conditions.