Big pin shaft
The big pin shaft is used at the chain link hinges of big flake chain grates, and its diameter and length follow the specification of the big flake chain belt. We supply replacement parts in this size.
Position on the chain belt
The grate surface of a flake-type chain grate is formed by interlocking flakes, the chain links string the flakes into an endless chain belt, and the pin shafts are the hinge axes between links. The big pin shaft matches the big flake chain belt; it belongs to a different size class from the splint pin shaft and the small pin shaft of the same series, so orders are distinguished by part name.
Material and service life
| Item | Description |
|---|---|
| Material | Cr25Ni20, Inconel |
| Typical service life | 8-15 months |
| Dimensions and tolerances | To OEM dimensions and tolerances |
The pin shaft specification gives two materials, Cr25Ni20 and Inconel, with a typical service life of 8-15 months. The pin shaft works in a dusty chain belt environment; the life range is stated for normal maintenance conditions, and actual replacement is decided by inspection results.
Parts to replace in the same batch
Pin shafts along one chain belt wear to a similar degree, so during maintenance they can be replaced section by section in batches, with the chain links, clamping plates and grate plates checked at the same time. We supply the full range of spare parts for flake-type chain grates and can provide selection advice and matching spare parts.
How to order
Please provide the chain belt specification, pin shaft drawings or physical samples, the material grade and the quantity; if original part numbers are available, simply give the numbers for verification. The product meets technical standard NB/T 47050-2016 and ships from the partner factory.