Rotors, Stators and Motors in Satisfactory

Motors go into vehicles, Fluid Trucks, Jetpacks, Hoverpacks and most machines above Tier 5. They also cost 48.5 units of raw ore each at the base recipe, and the alternates available cut that in half. This is one of the chains where recipe choice genuinely changes what your factory can support.

Rotors

Recipe	Output	Ore per unit	Inputs
Rotor	4.0/min	11.25	20 Iron Rod + 100 Screws
Alternate: Steel Rotor	5.0/min	9.00	10 Steel Pipe + 30 Wire
Alternate: Copper Rotor	11.2/min	8.33	22 Copper Sheet + 195 Screws

Copper Rotor wins on both measures at once — nearly three times the output per machine and the lowest ore cost. The catch is 195 screws per minute, which is a serious screw line.

Steel Rotor avoids screws entirely and is the practical pick if your screw production is the thing holding you back. Slightly worse on ore than Copper Rotor, considerably better than the base recipe.

Stators

Recipe	Output	Ore per unit	Inputs
Stator	5.0/min	13.0	15 Steel Pipe + 40 Wire
Alternate: Quickwire Stator	8.0/min	10.5	16 Steel Pipe + 60 Quickwire

Only one alternate here, and it is better on both counts. It needs caterium, which is the recurring theme in every mid-game chain.

Motors

Recipe	Output	Ore per unit	Power	Inputs
Motor	5.0/min	48.5	15 MW	10 Rotor + 10 Stator
Alternate: Rigor Motor	7.5/min	24.46	55 MW	4 Rotor + 4 Stator + 1 Crystal Oscillator
Alternate: Electric Motor	7.5/min	32.0	15 MW	4 Electromagnetic Control Rod + 8 Rotor

Rigor Motor halves the raw ore per motor — 24.46 against 48.5 — and produces 50% more per machine. The costs are a Crystal Oscillator supply and 55 MW instead of 15 MW.

That power difference is real but small in context: 40 MW extra per Manufacturer, against a saving of 24 units of ore per motor. If ore is your constraint, this is not a close call.

Electric Motor is the middle option: same power as the base recipe, 34% less ore, 7.5/min. It needs Electromagnetic Control Rods rather than oscillators, which may or may not be easier depending on what you have built.

The savings compound

This is the important part, and it is easy to miss when comparing recipes one at a time.

The 48.5 figure for a base Motor already includes the ore inside its rotors and stators. So improving the rotor recipe improves the motor figure too, before you touch the motor recipe at all.

Stack all three upgrades — Copper Rotor, Quickwire Stator, Rigor Motor — and the compounded saving is far larger than any single change suggests. Deep chains reward optimising upstream first, because every improvement flows down through everything above it.

The practical order: fix rotors, then stators, then the motor recipe itself. If you only ever change one, change the rotor.

Screws decide this chain

Look at the base Rotor recipe: 100 screws per minute for 4 rotors. Copper Rotor wants 195.

Screws are the classic early bottleneck because the standard recipe converts iron rods into screws at a poor rate, and everything that needs screws needs a great many of them. Two alternates — Cast Screw and Steel Screw — remove most of that pain, and they are among the highest-value early hard drive picks for exactly this reason.

If your rotor line is starved, the problem is almost always screws rather than rotors, and the fix is a recipe change two steps upstream rather than more Assemblers.

Sizing a motor line

Base recipe: one Manufacturer produces 5 motors per minute from 10 rotors and 10 stators, which needs 2.5 Rotor Assemblers and 2 Stator Assemblers behind it.

Ten motors per minute is therefore two Manufacturers, five Rotor Assemblers, four Stator Assemblers, plus the screw, wire and steel pipe lines feeding those. The visible machine is a small fraction of the build.

Work backwards from what actually consumes motors. Vehicles and Fluid Trucks are one-off build costs; machines above Tier 5 consume them continuously. Sizing for the continuous demand and buffering for the bursts is the usual right answer.

Where motors are consumed

Understanding the demand shape prevents both over- and under-building.

One-off build costs. Vehicles, Fluid Trucks, Jetpacks, Hoverpacks and Drone Ports each want motors once. This demand is bursty: nothing for hours, then fifteen motors for one truck.

Continuous consumption. Motors are an ingredient in higher assembled parts and in several phase requirements, and that draw is steady.

Machine build costs. Most machines above Tier 5 list motors, so every factory expansion consumes them.

The right shape is a modest continuous line running into a storage container. The line covers ongoing demand, the container absorbs the bursts, and you are never waiting on motors to build a truck.

Caterium keeps appearing

Notice that the best stator recipe needs Quickwire, the best wire recipes need caterium ingots, and the best circuit board alternate needs Quickwire too.

Caterium is optional for a long time and then turns out to be the input that improves four separate chains at once. If you have been deferring a caterium outpost, the cumulative argument across rotors, stators, wire and electronics is stronger than any single chain makes it look.

That is a general pattern worth noticing: the resources that unlock multiple alternates are worth more than their own chain suggests.

Common mistakes

Optimising the motor recipe first. Rotors are upstream; fixing them improves the motor figure automatically.

Blaming rotors when screws are the problem. Check the screw line before adding Assemblers.

Dismissing Rigor Motor over its 55 MW. Forty extra megawatts against half the ore per motor is rarely a close comparison.

Taking Copper Rotor without a screw line to match. 195 screws per minute is not incidental.

Reading the 48.5 figure as the motor alone. It includes everything inside the rotors and stators.