Double wide shaft collars


Double wide shaft collars are manufactured in one- and two-piece clamp type. They have 25% more holding power than equivalent size and type standard collars. Double wides can be used as a short rigid coupling in space restricted applications that will not fit a standard sized rigid coupling. SSJ Group manufactures double wide shaft collars in 1215 lead-free steel with a proprietary black oxide finish, 303 stainless steel, and high-strength 2024 aluminum. Bore sizes range from 1/8″ to 2″ and 6mm to 25mm.

Bore (B)  1.1250 in Bore Tolerance  +0.0020 in / +0.0005 in
Keyway (K) 1/4 in Width (W) 1 1/16 in
Outer Diameter (OD) 1 7/8 in Width Tolerance +0.003 in / -0.010 in
Clearance Diameter (C) MAX  2.140 in Recommended Shaft Tolerance  +0.0000 in / -0.0005 in
Forged Clamp Screw  1/4-28 Screw Material Alloy Steel
Hex Wrench Size  3/16 in Screw Finish  Black Oxide
Seating Torque  170 lb-in Screw Location (R) 0.740 in
Number of Screws 2 ea
Material Specification 1215 Carbon Steel Bar Temperature  -40°F to 350°F (-40°C to 176°C)
Finish Specification  Hot Process Black Oxide, Impregnated with Naphthenic Oil, Centrifugally Dried Manufacturer Ruland Manufacturing
Country of Origin USA Weight (lbs) 0.480800
UPC 634529305812 Tariff Code 8483.60.8000

Installation instructions:

  1. Use the WCLK-18-F double wide shaft collar as it is received.
  2. Wipe the bore clean.
  3. Apply a thin coat of light oil to the shaft.
  4. Tighten the screws in two stages, starting with the inside screws. Using a torque wrench with 3/16″ bit, tighten the inside screws to 85 lb-in which is half the recommended seating torque. Repeat for the outside screws, again tightening to half of the recommended seating torque.
  5. Tighten the screws to the full recommended seating torque of 170 lb-in following the same pattern, starting with the inside screws first.

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