All of our dump blocks are designed, manufactured and assembled at our USA facility.

A Columbia Steel standard dragline dump block at work
Columbia Steel dragline dump blocks are made in the USA

Product Details:

    • High strength steel construction
    • Supplied with Astralloy® shaft
    • Timken® Bearings
    • Machined lock nuts with seals
    • Cast nut protection

Same- and opposite-plane designs for all Columbia dump blocks are available
Our same-plane and opposite-plane designs use standardized pin lengths and diameters, with eccentric bushings at the pin holes. Columbia Steel dump blocks are compatible with the ferrule socket system. You can pass a wire rope ferrule end through an assembled dump block — no more disassembling for changing out ropes. Tighter (sheave/side-frame) mating also helps to guide rope and exclude dirt.

There’s a Columbia dump block design that’s right for your rigging:

Dragline Armor Blocks are fully enclosed dump blocks are available in popular sizes

Armor Block®

Fully enclosed for the grittiest conditions.
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Bantam dragline dump block for reduced rigging weight

Bantam Block

The lighter weight dump block with a tough attitude.
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Columbia Steel dragline rigid dump block design helps minimize rigging weight

Rigid Block

When minimizing weight is your top priority.
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Timken is a registered trademark of The Timken Company. Astralloy is a registered trademark of Astralloy Steel Products, Inc.