Harrington Hoists and Cranes LB Lever Hoist - (L5) - Manual (Page 30)

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Table 5-9 Free Chain Spring Dimensions
Product Code
L Dimension
Inches (mm)
A Dimension
(degrees)
Standard Discard Standard Discard
Non Slip
Clutch
LB008, LB010
LB015, LB020,
LB028
2.60 (66) 2.32 (59)
180 165
LB030, LB060,
LB090
2.80 (71) 2.52 (64)
With Slip
Clutch
LB008, LB010
LB015LB020,
LB028
2.64 (67) 2.36 (60) 145 160
LB030, LB060,
LB090
2.95 (75) 2.68 (68) 110 125
Table 5-10 Top Hook & Bottom Hook Dimensions
“k” Measured When New:
Top: _________________________
Bottom: ______________________
Product Code
Nominal "k"
Dimension*
inch (mm)
"u" Dimension
inch (mm)
"t" Dimension
inch (mm)
Standard Discard Standard Discard
LB008 1.73 (44) 0.77 (19.6) 0.73 (18.6) 0.55 (14.0) 0.52 (13.3)
LB010 2.05 (52) 0.83 (21.0) 0.79 (20.0) 0.59 (15.0) 0.56 (14.3)
LB015 2.17 (55) 1.01 (25.7) 0.96 (24.4) 0.75 (19.0) 0.71 (18.1)
LB020 2.48 (63) 1.14 (29.0) 1.09 (27.6) 0.83 (21.0) 0.79 (20.0)
LB028 2.48 (63) 1.14 (29.0) 1.09 (27.6) 0.83 (21.0) 0.79 (20.0)
LB030 2.64 (67) 1.22 (31.0) 1.16 (29.5) 0.96 (24.5) 0.92 (23.3)
LB060 3.54 (90) 1.61 (41.0) 1.54 (39.0) 1.34 (34.0) 1.27 (32.3)
LB090 4.37 (111) 2.05 (52.0) 1.95 (49.4) 1.63 (41.5) 1.55 (39.4)
* 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 to make determinations about hook
deformation/stretch. See Sec
tion 5.7, “Hooks - Stretch”.