Stafford Manufacturing Corp.
256 Andover St.
Wilmington, MA 01887

Phone: 978.657.8000 or 800.695.5551
Fax: 978.657.4731 or 800.649.5101
Email: sales@staffordmfg.com
Website: www.staffordmfg.com
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  • Smooth bore protects shafts from damage
  • Superior holding power over set-screw type collars
  • Offered in High Strength, Low Profile and Heavy Duty styles
  • Stocked in a variety of materials
1-Piece Clamp-Type Shaft Collars are for use on standard round shafts, hard or soft, as well as on thin wall tube or over a split hub. Precision machined, non-marring, easy to adjust, with high clamping power, they are stocked in the following materials:
  • Steel
  • Stainless Steel
  • Aluminum
  • Nylon
  • Delrin
Offered in three styles:
  • High Strength: Clamp screw does not protrude beyond the outside diameter (OD)
  • Low Profile: Clamp screw protrudes beyond the OD
  • Heavy Duty: Uses larger clamp screw and has larger OD for 2X holding power
Standard Series offers economy-priced versions of low-profile styles (31LXXX and 31SXXX parts).
One-Piece Split Clamp-Type Shaft Collars
Unit of Measure
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Part Number

Bore Size

Material

Type

Outside Diameter

Width

CAD

7S301 N/A 3-1/16 in N/A Stainless Steel (303) N/A Low Profile N/A 4.500 in N/A 0.875 in N/A CAD Icon (for items table)
7L301 N/A 3-1/16 in N/A Steel N/A Low Profile N/A 4.500 in N/A 0.875 in N/A CAD Icon (for items table)
7A302 N/A 3-1/8 in N/A Aluminum N/A Low Profile N/A 4.500 in N/A 0.875 in N/A CAD Icon (for items table)
7S302 N/A 3-1/8 in N/A Stainless Steel (303) N/A Low Profile N/A 4.500 in N/A 0.875 in N/A CAD Icon (for items table)
7L302 N/A 3-1/8 in N/A Steel N/A Low Profile N/A 4.500 in N/A 0.875 in N/A CAD Icon (for items table)
7A303 N/A 3-3/16 in N/A Aluminum N/A Low Profile N/A 4.500 in N/A 0.875 in N/A CAD Icon (for items table)
7S303 N/A 3-3/16 in N/A Stainless Steel (303) N/A Low Profile N/A 4.500 in N/A 0.875 in N/A CAD Icon (for items table)
7L303 N/A 3-3/16 in N/A Steel N/A Low Profile N/A 4.500 in N/A 0.875 in N/A CAD Icon (for items table)
1A304 N/A 3-1/4 in N/A Aluminum N/A High Strength N/A 4.750 in N/A 0.750 in N/A CAD Icon (for items table)
7A304 N/A 3-1/4 in N/A Aluminum N/A Low Profile N/A 4.500 in N/A 0.875 in N/A CAD Icon (for items table)
1S304 N/A 3-1/4 in N/A Stainless Steel (303) N/A High Strength N/A 4.750 in N/A 0.750 in N/A CAD Icon (for items table)
7S304 N/A 3-1/4 in N/A Stainless Steel (303) N/A Low Profile N/A 4.500 in N/A 0.875 in N/A CAD Icon (for items table)
1L304 N/A 3-1/4 in N/A Steel N/A High Strength N/A 4.750 in N/A 0.750 in N/A CAD Icon (for items table)
7L304 N/A 3-1/4 in N/A Steel N/A Low Profile N/A 4.500 in N/A 0.875 in N/A CAD Icon (for items table)
1L304HD N/A 3-1/4 in N/A Steel N/A Heavy Duty N/A 5.000 in N/A 1.000 in N/A CAD Icon (for items table)
7A305 N/A 3-5/16 in N/A Aluminum N/A Low Profile N/A 4.750 in N/A 0.875 in N/A CAD Icon (for items table)
7S305 N/A 3-5/16 in N/A Stainless Steel (303) N/A Low Profile N/A 4.750 in N/A 0.875 in N/A CAD Icon (for items table)
7L305 N/A 3-5/16 in N/A Steel N/A Low Profile N/A 4.750 in N/A 0.875 in N/A CAD Icon (for items table)
7A306 N/A 3-3/8 in N/A Aluminum N/A Low Profile N/A 4.750 in N/A 0.875 in N/A CAD Icon (for items table)
7S306 N/A 3-3/8 in N/A Stainless Steel (303) N/A Low Profile N/A 4.750 in N/A 0.875 in N/A CAD Icon (for items table)
7L306 N/A 3-3/8 in N/A Steel N/A Low Profile N/A 4.750 in N/A 0.875 in N/A CAD Icon (for items table)
1A307 N/A 3-7/16 in N/A Aluminum N/A High Strength N/A 5.000 in N/A 0.750 in N/A CAD Icon (for items table)
7A307 N/A 3-7/16 in N/A Aluminum N/A Low Profile N/A 4.750 in N/A 0.875 in N/A CAD Icon (for items table)
1S307 N/A 3-7/16 in N/A Stainless Steel (303) N/A High Strength N/A 5.000 in N/A 0.750 in N/A CAD Icon (for items table)
7S307 N/A 3-7/16 in N/A Stainless Steel (303) N/A Low Profile N/A 4.750 in N/A 0.875 in N/A CAD Icon (for items table)
Unit of Measure
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