Harrington Hoists and Cranes MR Trolley - (MR1) - Manual (Page 35)

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Table 5-6 Motor Brake Wear Dimensions
"A" Dimension - inch (mm)
Single Speed Dual Speed
Capacity
(Ton)
Standard Discard Standard Discard
1 and 2 1.28 (32.5) 1.22 (31.0) 1.45 (36.8) 1.43 (36.3)
3 to 20 1.28 (32.5) 1.22 (31.0) 1.45 (36.8) 1.41 (35.8)