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RIG // BLOCKS
BCD
ISC // SPRING LOCK ALUMINUM BLOCKS ISC Spring Lock Blocks are widely used and very popular with
today's arborists, for their simplicity and strength.
• A comprehensive ID plate
• Colored cheek plates and sheaves to easily identify max rope sizes, safe working-load limits, max breaking strengths, and sheave sizes
• Rounded edges, sleek coatings, and new, fixed-bollard dimensions
• Excellent bend radii
• Easy-to-open fixed-pin attachment
KIT17
A
ITEM #
16455
16454
36219
SHEAVE
2 3/4" 2 3/4" 1/2"
KIT25 KIT17 KIT18
LINE MAX
3/4" 5/8" 1/2"
WLL 10:1
2.2 ton 2.2 ton .95 ton
WEIGHT
3.75 lbs 3.75 lbs 1 lb
SHEAVE COLOR
green orange gray
A
B
21862 4 5/8" 3/4" 4.4 ton 7.7 lbs green
C
D
COMBOS
Yellow 3/4" block with 8' loopie (Green) Red 3/4" block with 8' loopie (Green) Red 5/8" block with 6' loopie (Orange)
E
F
DMM // IMPACT BLOCKS
With increased strength and more rope-friendly interaction between the cheekplates, bushings, and sheaves. These blocks are made from hot-forged 6082-T6 aluminum alloy for maximum strength-to-weight ratio, then polished, heat-treated, and anodized for an incredibly robust finish.
• No prefabricated bolts, pins, or plating
• All edges are smooth
• Componentry forged or CNC-milled
• Connecting points are either countersunk or rounded
• Stainless-steel 303 spindle and anchor pins
• Self-lubricating Oilite bronze bushings for years of trusted service
KIT24
ITEM #
33784
33785
COMBOS
SHEAVE
3 1/4" 4"
KIT24 KIT23
LINE MAX
5/8" 3/4"
WLL 10:1
4.5 ton 6.74 ton
WEIGHT
4.1 lbs 7.65 lbs
SHEAVE COLOR
green yellow
E
F
3/4" block with 8' loopie (Green) 5/8" block with 6' loopie (Orange)