Surplus Workbench Upgrade
20% chance to produce a random surplus part (1-8) when crafting. Surplus parts are used in special alternate recipes.
The Surplus Workbench Upgrade is a workbench upgrade in Rust, fitted into a workbench to change what the bench does. Crafts at the workbench can pay out bonus items, which differ from one recipe to the next. You craft it at a Level 2 Workbench.
Workbench upgrade
Crafting at the bench can pay out extra items. Which ones depends on what you craft: each item lists its own under Surplus.
A workbench holds several upgrades, but never two of the same.
How to craft the Surplus Workbench Upgrade
Crafting one takes 25 seconds at a Level 2 Workbench and costs 5 × Gears, 3 × Metal Spring and 300 × Scrap.
5 
3 
300 
Craft Speed and Accelerated workbench upgrades shorten these times.
What the Surplus Workbench Upgrade recycles into
A green recycler always gives back 2 × Gears and 1 × Metal Spring for one.
×2 ×1 50% 50% ×3 ×1 80% 
×3 ×2 75% 25% 
×2 ×1 20% Stats checked against the Rust game files on 9 November 2026.
