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Coalcutting machine pick wear disk is punched out as hexagon of maximum diameter points and interposed minima at spacing to cushion pick and pickholder wear.
Coalcutting machine pick wear disk is punched out as hexagon of maximum diameter points and interposed minima at spacing to cushion pick and pickholder wear.
The wear disk (10.1) is maximally diametered at poiints round the disk to equal the outside diameter of the machine pick (D), the disk diameter preferably diminishing between the maximum points to a minimum, halfway between two maximum points. The points of maximum diameter are equi-spaced round the disk at 60 deg giving n = 6 as the total of points. The disk preferably describes a hexagon of crests and valleys round the disk circle. The disks can be punched out in a spaced (d) row.
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