Timber Processing

The Pain Point: Unplanned Downtime from Chain Failure Under Shock Loading

One of the biggest and most costly problems in timber processing is unexpected chain failure caused by shock loading. Sawmill or debarking operation deals with heavy, irregular logs dropping onto conveyors, jamming in chippers, and lurching through edgers and trimmers.

Every time a log hits the chain system unevenly, it sends a violent shock load through the entire drive - and if the chain isn't built to handle it, the result is a broken or stretched chain, a production line that grinds to a halt, and potentially hours of costly unplanned downtime while maintenance crews carry out repairs. A single chain failure across a sawline conveyor, log deck, or debarker infeed can have a significant ripple effect on the entire mill's output for the day.

The Renold Solution: Ultra Welded Steel Timber Chain

This is precisely the scenario the Renold Ultra chain is engineered to address. Ultra welded steel chains provide ultimate link construction and high strength with advanced heat treatment and material selection, even under high impact loading conditions.

The key is in how the chain pins are treated. In addition to thru-hardening and a ground finish, selected WH series chain pins are also induction hardened to provide an Ultra hard-wearing surface to provide additional wearability and chain life. This means that even as shock loads hammer the pin-to-bush interface - the most vulnerable point in any chain under impact - the surface remains hard and resistant to deformation, dramatically extending the time between replacements.

On top of that, light oil spray is applied to prevent potential corrosion when in shipping and storage. By request, chain can also come pre-lubricated via oil bath or hot grease dip to support initial bedding-in of pins, bushes, and rollers at start-up, while also extending shelf life and protecting the chain from the very first revolution.

The bottom line: by replacing a standard chain with the Ultra, timber processors get a chain that is purpose-built to absorb the punishment of their environment - translating directly into fewer breakdowns, less maintenance intervention, and more tonnes processed per shift.