MOT V 2020.0510 L=47,5cm Ø=23,5cm WT=1845gr
Measuring tool consisting of a disc or wheel (approx. 20 cm) that rotates on an axis fixed in an iron or wooden handle. Disc or wheel can be made of wood, iron or a combination of both (1). Usually there is a radial mark.
After the wheelwright has driven the rims on the spokes (see also spoke dog) the wheel returns to the blacksmith to be ironed. That craftsman measures the circumference of the wheel by rolling the traveller over the wheel and transferring the same number of rotations to the iron band. Then he can chop or cut it to the desired length.
The tracing wheel is also used sporadically by the millwright when covering the millstone with iron hoops.
See also the wheeled verge cutter. [MOT]
(1) NEDERLOF: 20.
MOT V 2019.0064
MOT V 2020.0510