Big flake front wheel
The big flake front wheel sits at the turning position at the front end of the flake chain and, together with the rear wheel, forms the closed loop of the chain. We supply the front wheel together with the adjacent rear wheel, chain, bearings and other spare parts.
Front turning position
At the front end of the grate the endless chain is turned by the big flake front wheel and then enters the carrying run, where the flake grate plates line up to form a continuous grate surface. The mating surface between the front wheel and the chain takes the bending stress of the turn, and once the teeth or the wheel surface wear, the chain no longer runs smoothly. It forms a set with the front bearing, big pin shaft and splint pin shaft in the same area.
Material and heat resistance
The wheel body material is determined by the original drawings and furnace temperature; Cr25Ni20 cast alloy steel is common in high-temperature sections, and other casting grades are also available. Examples of heat resistance temperatures for common materials from the partner factory are given below:
| Material | Heat resistance temperature |
|---|---|
| HT250 | 520℃ |
| RTCr2 | 600℃ |
| RTCr3Si2 | 900℃ |
| RTQSi2 | 1200℃ |
Machining and inspection
The front wheel is made to OEM dimensions and tolerances, with precision casting and machining to ensure the fit between wheel surface and shaft. Material and dimensions are checked against technical standard NB/T 47050-2016, and dimensional verification and performance testing are completed before delivery.
Supply arrangements
The partner factory ships, and we can supply the front wheel, rear wheel and chain as a complete set, or as individual pieces, with dimensions and material customised to customer requirements.