RenfroeToo supplier of Sheaves, Snatch Blocks, Crane Blocks, Roller Bearing Swivels, Skates, Angular Contact Bearing Swivels, Nylon Wheeled Load Movers, Load Weighing Tongs, Load Weighting Shape Lifters, Load Weighing Blocks, Load Limiters, and Hydraulic Toe Jacks.

 
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SHEAVES


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Sheave Inquiry Form		 The benefits of Cold Roll Forming:
  • No costly casting molds. As a result of utilizing our cold-forming process, tooling costs are relatively low, especially considering the mold cost can be amoritized over any quantity of sheaves purchased.

  • Cold roll forming prevents pores, cracks, and lack of uniformity that is normally found in cast sheaves.

  • This process results in a lighter sheave; as much as 50% less than cast or forged sheaves.

  • Produces a smooth groove which helps increase the life of the wire rope.

  • The Brinell hardness of the groove generated by the cold forming process of rolled steel, is higher than the initial raw material used.

  • As a result of a lighter weight sheave, there is less slippage of the wire rope at start-up, thus increasing
    the life of the sheave.

  • This manufacturing process reduces the lead time for special orders.


    • Model A Sheave
    Model A sheaves are manufactured utilizing a cold roll forming process which results in the production of a consistently high quality wire rope sheave.

    The sheave profile is formed against the edge of a rotating disk, forcing a series of hardened rollers against the edge of the rotating disk. Gradually the sheave is formed to specification by our customer designed machinery. The hub is then pressed into place and welded. The process is completed with machining, sandblasting, and painting.

    Model A sheaves have a Brindell hardness number of 200-250 HB, but upon special order, can be supplied with a Brindell hardness number of 300-350HB.

    Model A sheaves are available in sizes from 8 in. O.D. to 23 in. O.D.

    Model C Sheave
    Model C sheaves are manufactured by first fabricating the rim by curving and forming rolled steel into the desired wire rope groove. Then the rim is assembled with two steel plates, a hub, and welded. The process is completed with machining, sandblasting, and painting.

    Model C sheaves have a Brindell hardness number of 200-250 HB, but upon special order, can be supplied with a Brindell hardness number of 300-350HB.

    Model C sheaves are available in sizes from 15 in. O.D. to 200+ in. O.D.

    Applicable to Both Models
    All sheaves are built with stepped hubs to eliminate stress failure in the weld. We are assured of very reliable welds by using a computer controlled Submerged Arc Welding (SAW) process. The precision aligned hub/sheave wheel combination adds to the bearing life and keeps the sheave on the job longer.

    Sheave Product ApplicationsGeneral Inspection Recomendations
  • Crane Blocks
  • Overhead Cranes
  • Railroad Car Pullers
  • Seaport Cranes
  • Pulpwood Yard Cranes
  • Draglines
  • Mining Equipment
  • Any Place Wire Rope Is Used
  • Oil Field
  • OEM's
    		•  Each individual sheave should be
    inspected periodically.
    They should be examined for the following:
  • Groove Depth, width, and contour.
  • Groove smoothness.
  • Broken or chipped flanges.
  • Cracks in hubs, spokes.
  • Signs of rope contact with guards.
  • Sheave bearings and shaft.
  • Out-of-Round condition.
  • Alignment with other sheaves.
    •      		Machine Bore (Plain Bore)
  • Very slow line speed, very infrequent use, and low load.

    • Bronze Bushing
  • Slow line speed, moderate load, and moderate use.

    • Ball and Roller Bearing
  • Faster line speeds, more frequent use, and greater load.

    • Click These Links for SPECIFICATIONS
    Sheave Model A (Machined Bore) Sheave Model A (Bronze Bushing) Sheave Model A (Ball Bearing)
    Sheave Model C (Machined Bore) Sheave Model C (Bronze Bushing) Sheave Model C (Ball Bearing)
    Sheave Model A (6in.-16in.O.D.) Sheave Model A (18in.-20in.O.D.) Sheave Model C
     
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    RenfroeToo manufacturers and distributors of products for load moving equipment.

     

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