Roll formed hardened Spirol® Spring Dowels accurately align mating components with respect to each other. They are formed around arbors to assure roundness, have staggered seams to prevent interlocking, and lead-in beveled chamfers ease insertion. Their outer diameter is larger than the diameter of the mounting hole, and their spring action enables them to conform to a drilled or cored hole and be self-retained.
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Spirol® Roll Formed Hardened Spring Dowels

Spirol® 6.25 to 6.50 Millimeter (mm) Outside Diameter Roll Formed Hardened Spring Dowel

Spirol® Roll Formed Hardened Spring Dowels

Spirol® 6.25 to 6.50 Millimeter (mm) Outside Diameter Roll Formed Hardened Spring Dowel

Spirol® Roll Formed Hardened Spring Dowels

Spirol® 6.25 to 6.50 Millimeter (mm) Outside Diameter Roll Formed Hardened Spring Dowel

Spirol® Roll Formed Hardened Spring Dowels

Spirol® 6.25 to 6.50 Millimeter (mm) Outside Diameter Roll Formed Hardened Spring Dowel

Spirol® Roll Formed Hardened Spring Dowels

Spirol® 8.25 to 8.50 Millimeter (mm) Outside Diameter Roll Formed Hardened Spring Dowel
Description N/A Roll formed hardened Spirol® Spring Dowels accurately align mating components with respect to each other. They are formed around arbors to assure roundness, have staggered seams to prevent interlocking, and lead-in beveled chamfers ease insertion. Their outer diameter is larger than the diameter of the mounting hole, and their spring action enables them to conform to a drilled or cored hole and be self-retained.
Brands N/A Spirol®
Material N/A Steel
Outside Diameter N/A 6.25 to 6.50 mm N/A 6.25 to 6.50 mm N/A 6.25 to 6.50 mm N/A 6.25 to 6.50 mm N/A 8.25 to 8.50 mm
Minimum Single Shear Strength N/A 6.90 kN N/A 6.90 kN N/A 6.90 kN N/A 6.90 kN N/A 11.90 kN
Wall Thickness N/A 0.56 mm N/A 0.56 mm N/A 0.56 mm N/A 0.56 mm N/A 0.71 mm
Nominal Dowel Diameter N/A 6.00 mm N/A 6.00 mm N/A 6.00 mm N/A 6.00 mm N/A 8.00 mm
Hole Tolerance N/A 6.00 to 6.13 mm N/A 6.00 to 6.13 mm N/A 6.00 to 6.13 mm N/A 6.00 to 6.13 mm N/A 8.00 to 8.13 mm
Length (L) (Decimal) N/A 10.00 mm N/A 12.00 mm N/A 20.00 mm N/A 25.00 mm N/A 12.00 mm
Finish N/A Phosphated Oiled Plain Oiled Zinc plated
Fabrication Process N/A Hardened
Material and Hardness N/A 1070-1095 Carbon Steel (AISI 1070-1080; DIN 177222 CK67-75; BS 1449 CS70-80) HV: 420 to 545
Features and Benefits N/A Hole Recommendations:
  • 1/2 the hole tolerance should be used for the fixed location of the dowel, and 1/2 for the mating part
  • Use drills or core pins equal to the nominal diameters to prepare holes
  • Hole tolerances should be utilized to accommodate normal shop practices
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