Small flake front wheel
The small-flake front wheel sits at the shaft end at the front of a flake-type chain grate and, together with the rear wheel, supports the chain circuit. It is a key part of the grate drive.
The drive position at the front
The small-flake front wheel mounts on the front shaft of the grate, where the chain turns and enters the working face. It keeps the same pitch as the small-flake rear wheel and the small-flake chain, and the mating surface between wheel body and shaft carries the chain tension. During assembly, check the clearance between the rim and the links so that the chain does not run off line and wear unevenly.
Choosing the material
Front-wheel material can run from HT200 and HT250 through the RTCr series up to RTCr16, with temperature resistance covering 480℃ to 900℃. Where the fuel has a higher calorific value or the furnace runs hotter, the high-chromium grades with better oxidation resistance are the better choice.
| Material | Temperature resistance | Suitable fuel |
|---|---|---|
| HT250 | 520℃ | Low-calorific-value coal |
| RTCr2 | 600℃ | High-calorific-value coal, biomass |
| RTCr5 | 700℃ | High-calorific-value coal, biomass |
| RTCr16 | 900℃ | All types of high-calorific-value coal, biomass |
Selection and supply
We supply the small-flake front wheel together with matching rear wheels, chains, pins and bearings, and the partner factory ships them. Give us the grate model, the shaft diameter and the dimensions of the old part, and we can help confirm the specification and make material and size to order.