R Series Blocks

SKU: SKM-565303

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Skookum R Series 5T full sided block with yoke. Model R4 with 4 in. sheave for 3/8 in. wire rope. Roller bearings.

Model
  • Multi-use wide throat & utili-sheave for passing a variety of line, connecting links, and terminations.
  • Work -hardening manganese steel sheaves maximize wire rope & sheave life.
  • Alloy sheave option offers same durability at a lower cost.
  • R6, R8, & R4 equipped with tapered roller bearings for long life in higher line speed applications.
  • R4 equipped with straight roller bearings to minimize size.
  • Recessed sheave prevents wire rope from binding between sheave and block side.
  • Full sided block maximizes sheave protection and strength.
  • Versatile draw pin allow for rapid reeving & exchange of attaching style.
  • Rugged cast alloy steel sides for demanding environments.
  • ASME B30.26-1 compliant

All dimensions are inches unless otherwise specified.

R-4-skookum-r-series-blocks-specification-diagram
NameValue
Sheave Diameter4
Wire Rope Min 1/4
Wire Rope Max 3/8
WLL (TONS)5
Weight (LBS)11.45
Replacement Sheave Part #SKM-571904
Draw Pin Part #SKM-551401
Height (A)10
Thickness (B)1.75
Width (C)4.75
Throat Bottom (D)1
Inside Throat Width (E)2.5
Throat Height (G)5.25
Yoke Bar Height (H)1
Yoke Bar Width (J)1

Dimensions are in inches unless otherwise noted.

Sheave DiameterWire Rope MinWire Rope MaxWLL (TONS)ABCDEGHJ
4 1/4 3/85101.754.7512.55.2511
6 3/8 1/2814.586.752.54.56.51.251.25
8 1/2 5/88178.58.752.54.757.251.381.38
10 1/2 5/8919.5810.53.54.757.251.381.38
4 1/4 3/85101.754.7512.55.2511
6 3/8 1/2814.586.752.54.56.51.251.25
8 1/2 5/88178.58.752.54.757.251.381.38
10 1/2 5/8919.5810.53.54.757.251.381.38