The Auto Anvil is an electric Slimefun machine.

The Auto Anvil repairs damaged gear.
Unlike the Vanilla Anvil, the Auto Anvil does not add a Prior Work penalty to the item being processed.
Place damaged gear in one input slot, and Duct Tape in the other. The Auto Anvil will restore a percentage of the item's total durability per operation. After processing, the repaired item will be placed in an output slot.
The item needs at least 1 point of durability lost in order for it to be processed.
| Processing time | 30s | |
| Tier | Tier 1 | Tier 2 |
| Energy buffer | 128 J | 256 J |
| Energy consumption | 24 J/s | 32 J/s |
| Total durability restored | 10% | 25% |