2015
TL5966 : Stevens' Mill - Tentering gear
taken 11 years ago, near to Burwell, Cambridgeshire, England
Stevens' Mill - Tentering gear
Part of Burwell museum. Stevens' Mill has been restored to working order again thanks to a generous Heritage Lottery Fund grant. The four storey towermill was built for Oliver Carter in 1820 and continued producing flour until the Great War. The building is grade II* listed.
Tentering - molinological application (provided by Chris Allen)
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.
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