Crosby McKissick 475 / 477 Floor Well Logger’s Blocks

  • Alloy aluminum housing for maximum strength and minimum weight.
  • Conductor cable ONLY is recommended for use with Well Logger’s Blocks.
  • For use in high speed well logging, perforating, etc.
  • Extra large double row, pre-adjusted sealed tapered bearing.
  • Quick opening pin for fast string-up, light weight for easy handling.
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475 / 477 Floor Well Logger's Blocks Types

475 / 477 Floor Well Logger's Blocks Specs

* Ultimate Load is 4 times the Working Load Limit.

† Other cable sizes available upon request.




Crosby is the world leader in rigging, lifting, and material handling hardware. We set the standard for quality, training, and technical expertise in the field.

The Crosby Group was the first to:

  • Produce the forged wire rope clip (1880s)
  • Produce wire rope guards on sheaves that can be opened for easy reeving (1925)
  • Forge load rating (working load limit) directly onto product (1958)
  • Quench and temper fittings for more reliable performance (1973)
  • Forge Product Identification Code (PIC) into each product that allows traceability to its respective date of production and material certification (1977)
  • Rate products as Fatigue Rated (1991)
  • Forge patented QUIC-CHECK™ markings into hooks, shackles, and various other rigging products to assist users in determining proper use (1992)
  • Produce a crane block that can be reeved without removing the wedge socket from wire rope in the United States (1996)
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All product warnings: Warnings Page