Harrington Hoists and Cranes (N)ER Hoist - ((N)ER2) - Manual (Page 35)

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Table 5-4 Top Hook & Bottom Hook Dimensions
“k” Measured When New:
Top: _________________________
Bottom: ______________________
Capacity Code
Nominal "k"
Dimension*
inch (mm)
"u" Dimension
inch (mm)
"t" Dimension
inch (mm)
Standard Discard Standard Discard
001H, 003S, 003H, 005L,
005S
1.77 (45.0) 0.93 (23.5) 0.88 (22.3) 0.69 (17.5) 0.65 (16.6)
010L, 010M, 010S 1.97 (50.0) 1.22 (31.0) 1.16 (29.5) 0.89 (22.5) 0.84 (21.4)
015S 2.36 (60.0) 1.44 (36.5) 1.37 (34.7) 1.04 (26.5) 0.99 (25.2)
020L, 020M, 020S, 025S 2.72 (69.0) 1.71 (43.5) 1.63 (41.3) 1.24 (31.5) 1.18 (29.9)
030L, 030C 2.87 (73.0) 1.87 (47.5) 1.78 (45.1) 1.36 (34.5) 1.29 (32.8)
050L 3.27 (83.0) 2.20 (56.0) 2.09 (53.2) 1.67 (42.5) 1.59 (40.4)
*These values are nominal since the dimension is not controlled to a tolerance. The "k" dimension should be
measured when the hook is new - this becomes a reference measurement. Subsequent measurements are compared
to this reference measurement in order to determine hook deformation/stretch. See Table 5- 3, “Hooks - Stretch”.
Figure 5-1 Hook Yoke Assembly Figure 5-2 Shaft Retainer Clip