Harrington Hoists and Cranes ED-DA Hoist - (ED3) - Manual (Page 30)

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Table 5-5 Top Hook & Bottom Hook Dimensions
“k” Measured When New:
Top: _________________________
Bottom: ______________________
Capacity
(lbs)
Hook
*Nominal "k"
Dimension
inch (mm)
"u" Dimension
inch (mm)
"t" Dimension
inch (mm)
Standard Discard Standard Discard
125 to 525
Bottom 1.73(44). 0.67(17) 0.60(15.3) 0.48(12.1) 0.43(10.9)
Top 1.77(45) 0.67(17) 0.60(15.3) 0.28(7.0) 0.25(6.3)
* 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 to make determinations about hook deformation/stretch. See Section 5.7,
“Hooks - Stretch”.
Table 5-6 Chain Wear Dimensions
Capacity
(lbs)
“P” Dimension
inch (mm)
“d” Dimension Wear Limit
Inch (mm)
Standard Discard Standard Discard
125 to 525 2.38 (60.5) 2.43 (61.7) 0.16 (4.0) 0.13 (3.3)