Express underground belt — Factorio Production Calculator
Express underground belt is crafted in the assembling machine in 2 seconds, producing 2 per craft from 80 × Iron gear wheel, 2 × Fast underground belt, 40 × Lubricant. At 60 per minute you need 2 assembling machines, and the chain behind it draws on 2 raw resources: iron ore, heavy oil.
Production chain for 60 Express underground belt / minute
| Item | Per minute | Machines | Machine |
|---|---|---|---|
| Iron plate | 7,725 | 412 | Furnace |
| Iron gear wheel | 3,675 | 61.25 | Assembling machine |
| Lubricant | 1,200 | 2 | Chemical plant |
| Transport belt | 150 | 1.25 | Assembling machine |
| Express underground belt | 60 | 2 | Assembling machine |
| Fast underground belt | 60 | 2 | Assembling machine |
| Underground belt | 60 | 1 | Assembling machine |
Raw materials
| Resource | Per minute |
|---|---|
| Iron ore | 7,725 |
| Heavy oil | 1,200 |
Machine counts are not rounded up. Add a little headroom in game — belt throughput and inserter speed usually mean you want 5-10% more than the exact number.
Express underground belt recipe
| Machine | Crafting time | Output | Ingredients |
|---|---|---|---|
| Assembling machine | 2 s | 2 | Iron gear wheel × 80, Fast underground belt × 2, Lubricant × 40 |
What the whole chain needs
60 express underground belts per minute pulls in 6 intermediate products, and the whole tree comes to 482 machines across 3 machine types, fed by 2 raw resources. The table above already sums demand across every branch — if copper cable is used by two recipes, you see the total, not one of them.
Belt check: the busiest input here moves 7,725 per minute, which is 8.58 of a yellow belt's 900 per minute. Above 1.0 and you need a second belt (or a faster tier) before the machines themselves become the limit.
What uses express underground belt
No base-game recipe consumes express underground belt — it is an end product. Once you build it, the chain stops here, which makes it a good target if you only want to size the sub-factory that feeds your mall.
What express underground belt is made from
- Iron gear wheel — 80 per craft
- Fast underground belt — 2 per craft
- Lubricant — 40 per craft
FAQ
How many assembling machines do I need for 60 express underground belts per minute?
2 assembling machines. One at standard speed produces 30 per minute, so 60 ÷ that number is the count. The calculator above rounds nothing — add 5-10% headroom for belt and inserter losses in a real factory.
How much raw ore does express underground belt take?
At 60/min the chain consumes 7,725 iron ore per minute, 1,200 heavy oil per minute. Those numbers are the theoretical minimum — mining productivity research and productivity modules both reduce them.
Machine counts assume bare machines at standard speed. Recipe data comes from the game's own prototypes (PlayerCalc, Factorio 2.0 base game). Not affiliated with Wube Software.