Geograph - photograph every grid square

In a mill context, tentering is changing the distance (gap) between the runner stone and the bed stone. Decreasing the distance results in a finer grain. As the stones go faster there is a natural tendency for the runner to rise and the tentering mechanism can be adjusted to counter this. In many windmills this is done by a governor that automatically compensates for the tendency of the runner to rise. In watermills it is done by hand with mechanisms of varying elegance. In this case, the second order lever at the bottom raises or lowers the footstep bearing that the spindle carrying the stone nut is supported by. The adjustment is by a vertical lead screw on the other side of the frame and in easy reach of the miller.

The four sailed mill was originally built in 1810 and remained in use until badly damaged in 1920. It was restored between 1982 and 1995 by the Ostick Family. There are two pairs of stones(one Peak and the other French Burr). A steam grasshopper engine was installed in the 1850s but little remains of the engine house.
The mill and adjacent tea room are open all year except Tuesdays.