Big flake splint pin shaft
The big flake splint pin shaft is the hinge that connects the clamping plate to the big flake chain link, and it belongs to the grate pin shaft family. We supply this size to the original machine’s dimensions.
Function of the hinge joint
The grate surface is made of interlocking flake grate plates; the chain links string the flakes together, and the pin shafts pass through the links to form the pivoting joints. Clamping plates and clips assemble and secure the grate plates, and the splint pin shaft passes between the clamping plate and the chain link, so this joint opens and closes repeatedly as the chain belt runs. Once the joint wears and loosens, the pitch of that whole section of chain belt changes with it.
Material and replacement interval
| Item | Description |
|---|---|
| Material | Cr25Ni20, Inconel |
| Typical service life | 8-15 months |
| Dimensions and tolerances | To OEM dimensions and tolerances |
| Technical standard | NB/T 47050-2016 |
The part specification lists two materials for the pin shaft, Cr25Ni20 and Inconel, with a typical service life of 8-15 months. This range is a reference for the replacement interval; actual replacement timing depends on operating conditions and on-site inspection results.
Removal, fitting and matching parts
When removing or fitting a splint pin shaft, the clamping plates, clips and grate plates in the same section are usually inspected at the same time, and parts worn beyond the limit are best replaced in the same batch. Pin shaft dimensions differ between the big flake and small flake series, so please state the series when ordering. We can provide selection advice and matching spare parts, shipped from the partner factory.