Series 321/326 (Standard Range)  
MODEL No. No. Of Sheaves Sheaves Size in inches Safe Working Load in Tonnes Centre Pin Dia. In mm Wire Rope Size Suitable
Lt11 -321 Single 10-12 8-10 45/50 mm 13 mm
Lt12-322 Double 10 -12 8-10 45/50 mm 13 mm
LU3-323 Triple 13 -15 20-22 70/72 mm 16 mm
U13-324 Triple 13 -15 25-27 75/78 mm 16 mm
U14-325 Quadruple 13-15 35-41 80/86 mm 20 mm
U15-326 Quintaple 13-15 45-50 88/90 mm 22 mm
Blocks with higher capacities can be designed to suit customers requirements.
Sheaves
HOW TO SELECT SHEAVES
A - Outside diameter
F - Tread diameter
C - Rim width
E - Bore at Center
D - Hub width
G - Hub width
Alloy Steel (Grade-80) Machined Trapezoidal section point Hooks for above Blocks
USED WITH CRANE BLOCKS, HARDENED AND TEMPERED FOR ULTIMATE LOADS
(Hooks of Higher Capacities also available)
Capacity (tons) A C G1 G H J M
8-10 233 85 42 45 79 64 51
22-22 327 119 60 60 111 89 71
25-27 369 134 68 70 125 123 80
35-41 465 169 80 85 157 127 101
45-50 520 189 90 100 176 174 113