The “OSCO” haulback block 488 is designed for use where block weight is a consideration. While these blocks are exceptionally light they incorporate the same high grade material throughout their construction as our heavier blocks. The weight to strength ratio is outstanding, making these blocks suitable for haulback work in the forest, mining and construction industries.

Properly maintained these blocks will give you years of service and an excellent return on your investment.

Recommended for ¾” to 1” wire rope.

Block Sides
The half shell Cast Steel block sides, heavily ribbed on the inside to give the block rigidity and durability while keeping its weight to a minimum, are carefully annealed for strength and toughness.

The “OSCO” alloy steel sheaves are heat treated for extra hardness to give outstanding durability. They revolve in recessed block sides making it impossible for rope to foul.

Oversize Timken Tapered Roller Bearings provide smooth operation at high speeds.

Axle Pins
Designed for oversized bearing assemblies, the “OSCO” machined alloy steel axle pins are drilled and fitted with recessed grease fittings for easy lubrication. The axle pin nuts are recessed into the block sides, making a smooth surface to prevent snagging.

Colour: Black sides with red sheave

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