How to Build a Water Wheel Millstone – Create Wiki (1.21.1)

A Water Wheel in a small water channel turns a Gearbox, and the gearbox turns the Millstone standing on it. On our test server the wheel turned at 8 RPM, the millstone with it, and the Stressometer showed 32 SU of 256 SU in use. Four wheat put in on top were all milled into wheat flour within 1,000 ticks (50 seconds) at that speed.

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Place the Water Wheel so that its axle points east–west, and lay a row of stone north and south of it at the same height: the floor of a small water channel that runs over the top of the wheel.
A Gearbox on the east side of the wheel takes the rotation around the corner: its top face turns the Millstone placed on it. The Millstone can only be driven from below.
A Stressometer on the other side of the gearbox shows how much of the wheel's capacity the machines use (look at it with Engineer's Goggles, or read its dial).
Glass on both sides and at both ends keeps the water in the channel. The Millstone itself closes the channel on the east side next to the wheel.
Pour one water source at the north end of the channel. The water flows south over the top of the wheel and turns it. Put wheat (or gravel, flowers, …) into the Millstone from above and take the flour out of it.

Materials 7 kinds · 20 items

Stonestep 1×4
Water Wheelstep 1×1
Gearboxstep 2×1
Millstonestep 2×1
Stressometerstep 3×1
Glassstep 4×11
Waterstep 5×1

Layer planLayer 1 is the bottom · north is up · 4 × 2 × 7 blocks

The layer plan appears with the 3D view.

Water wheel (in a glass channel), gearbox, millstone and stressometer.Textures, models and item names © simibubi and the Create contributors. Vanilla textures © Mojang.

Why it is built like this

The wheel only turns when water flows past it: the water source sits at one end of the channel and flows over the top of the wheel.
The millstone can only be driven from below. The gearbox turns rotation from the wheel's horizontal axle up into the millstone.
The stressometer is optional: it shows that the millstone uses 4 SU per RPM — 32 SU at 8 RPM — and that the wheel can carry 256 SU, room for several more machines.

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What the millstone makes

Wheat gives flour (with a chance of extra flour and seeds), gravel gives flint, cobblestone gives gravel, flowers give dyes, and more:

10%Secondary

Allium → 2 × Magenta Dye + 2 × Purple Dye (10%) + Pink Dye (10%)

Andesite → Cobblestone

10%Secondary

Azure Bluet → 2 × Light Gray Dye + 2 × White Dye (10%)

10%Secondary

Beetroot → 2 × Red Dye + Beetroot Seeds (10%)

5%Secondary

Blue Orchid → 2 × Light Blue Dye + Light Gray Dye (5%)

25%Secondary

Bone → 3 × Bone Meal + White Dye (25%) + 3 × Bone Meal (25%)

All 47 Milling recipes in the Millstone

Crafting the parts

8 × any Oak Planks (#minecraft:planks) + Shaft → Water Wheel

4 × Cogwheel + Andesite Casing → Gearbox

Cogwheel + Andesite Casing + any Andesite (#c:stones) → Millstone

Compass + Andesite Casing → Speedometer

Speedometer → Stressometer

Next: How to Build a Mechanical Press, or the numbers behind the stress: Stress and Speed in Create.

Recipes, names and numbers are read from the mod files of Create 6.0.10 for Minecraft 1.21.1 (NeoForge). Not affiliated with the mod authors, Mojang or Microsoft.