jkn wrote:
The runners have become pretty worn over the years and sliding the shelf in and out is now pretty 'graunchy'. I am thinking of replacing the runners. But in this application the forces are bit different to most drawer runner uses:

- most force is applied to the sliding shelf part when it is extended
- there is a larger degree of lateral 'tilt' force on the shelf than on most drawer situations

Any thoughts about the best kind of runners to fit as a replacement here?

You can get industrial slides - Accuride is a popular make:
https://uk.farnell.com/c/enclosures-...ssories/slides

There's all kinds of variations - removable/non removable, different depths
of pull-out, self-closing, locking in the out position, etc.

They aren't necessarily cheap but they're designed for things like having a
50kg server hang 1m out of a rack while someone tinkers with it, and then
push it back in. They definitely don't sag when that happens.

The only thing they aren't always good for is side-to-side forces - they're
designed to be attached to two rigid objects, but there can be side-to-side
wobble when the server/etc is fully pulled out. It's not a problem when
say 90% pulled out.

Theo