Small pin shaft
The small pin shaft is the smaller-diameter hinge pin on a flake-type chain grate. It connects the flakes, chain links and splints, and is a common spare part replaced together with the grate.
Hinge position and loads
The small pin passes through the pin holes of the flake and the chain link and forms a hinge point that can rotate, letting the chain turn smoothly between the front and rear wheels. It works in a hot, dusty environment, and wear opens up the clearance so the grate surface starts to work loose and shift. During maintenance, measure the shaft diameter against the drawing dimensions to judge whether it needs replacing.
Material and specifications
Small pins are usually made of Cr25Ni20, with Inconel available for high-temperature positions, and a typical service life of 8-15 months. Pins at different positions on the same grate do not share one specification, so distinguish them by drawing when selecting parts.
| Item | Parameter |
|---|---|
| Standard material | Cr25Ni20 |
| High-temperature option | Inconel |
| Typical service life | 8-15 months |
How we supply
The partner factory handles dispatch, and we can supply small pins as well as large pins, splint pin shafts, chain links and other matching parts from the same series. All parts are machined to OEM dimensions and tolerances; just give us the grate model and the dimensions of the used part when selecting, and we can help prepare the parts list.