Wooden mill gears turn beneath a framework of heavy beams. A broad horizontal wheel surrounds the main timber shaft, meeting a smaller wheel on a separate shaft to the right. Their teeth join at the same height. Slight softness along the moving rims contrasts with the clearer posts and bearing blocks, giving the mechanism a sense of motion within a solid room.

The timber shafts continue above and below the wheels through substantial supports. Iron bands, bolts and darkened fittings break up the long wooden surfaces. Worn edges, splits and changes in colour reveal the different pieces that make up the machinery rather than presenting them as one smooth object.

Window light enters from the left and reaches across the gears, floorboards and near rail. Beyond the mechanism, diagonal braces and a steep staircase lead the view into further levels of the mill. The overlapping beams create depth throughout the tall interior, while the two meshing wheels provide a clear point around which the rest of the structure is arranged.