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Left shaft couples to Boiler · 800 W output.

Property	Value
Stack size	64
Placement	Place from the hotbar

Make this item using the crafting or processing recipes below.

Place immediately on the Boiler Engine’s right with the shafts meeting. Electrical cables can connect on any of its six faces. See Electricity and batteries.

Opening its controls shows a matching illustration and name in the left panel. See Machine interfaces.

This is the electrical generator in a boiler setup. It supplies 800 W only when its left shaft directly meets the right shaft of an eligible running boiler; both machines must face the same direction. A cable, pipe or gap between the machines prevents coupling. The boiler can still burn fuel without this connection. See the complete generation route.

Station:
Machinist's Bench · 4×4

Shapeless: slot positions do not matter. Keep each pictured ingredient stack and its quantity; the layout below is only an example.

×8	×2	×1

Output:
Alternator ×1

Ingredient	Total per operation
Copper Wire	8
Iron Cog	2
Machine Casing	1

Follow a result to see its complete ingredients and recipe.

Result	Station	Recipe
×1 Wind Turbine	Machinist's Bench	View recipe