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  • Product Image- Style 453 Carbide Tip, “Blind Hole” Koolream®, Spiral, Chucking Reamer
  • Dimensional Drawing
Coolant fed construction increases tool life and improves surface finish when reaming aluminum, cast iron, steels, plastics and other abrasive materials.
  • Carbide tipped, high speed steel bodies.
  • Use decimal size range column to determine the overall length, flute length and shank dimensions for modified and grind down reamers.
  • Precision ground cutting edges.
  • Polished flutes for smooth chip flow.
  • Right hand spiral, right hand cut construction has better chip evacuation when used on ductile materials or blind holes.
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Item #

Cutting Ø "D" (Inch)

Cutting Ø "D" (mm)

Dec. Equiv. (Inch)

Overall Length "A" (Inch)

Overall Length "A" (mm)

Flute Length "B" (Inch)

Flute Length "B" (mm)

Shank Diameter "C" (Inch)

Shank Diameter "C" (mm)

N/A 1/4 N/A 6.35 N/A 0.2500 N/A 6 N/A 152 N/A 1 1/2 N/A 38 N/A 15/64 N/A 5.954
N/A 9/32 N/A 7.142 N/A 0.2812 N/A 6 N/A 152 N/A 1 1/2 N/A 38 N/A 15/64 N/A 5.954
N/A 5/16 N/A 7.938 N/A 0.3125 N/A 6 N/A 152 N/A 1 1/2 N/A 38 N/A 9/32 N/A 7.142
N/A 11/32 N/A 8.733 N/A 0.3438 N/A 6 N/A 152 N/A 1 1/2 N/A 38 N/A 9/32 N/A 7.142
N/A 3/8 N/A 9.525 N/A 0.3750 N/A 7 N/A 178 N/A 1 3/4 N/A 44 N/A 5/16 N/A 7.938
N/A 13/32 N/A 10.317 N/A 0.4062 N/A 7 N/A 178 N/A 1 3/4 N/A 44 N/A 5/16 N/A 7.938
N/A 7/16 N/A 11.113 N/A 0.4375 N/A 7 N/A 178 N/A 1 3/4 N/A 44 N/A 3/8 N/A 9.525
N/A 15/32 N/A 11.908 N/A 0.4688 N/A 7 N/A 178 N/A 1 3/4 N/A 44 N/A 3/8 N/A 9.525
N/A 1/2 N/A 12.7 N/A 0.5000 N/A 8 N/A 203 N/A 2 N/A 51 N/A 7/16 N/A 11.113
N/A 9/16 N/A 14.288 N/A 0.5625 N/A 8 N/A 203 N/A 2 N/A 51 N/A 7/16 N/A 11.113
N/A 5/8 N/A 15.875 N/A 0.6250 N/A 9 N/A 229 N/A 2 1/4 N/A 57 N/A 9/16 N/A 14.288
N/A 11/16 N/A 17.463 N/A 0.6875 N/A 9 N/A 229 N/A 2 1/4 N/A 57 N/A 9/16 N/A 14.288
N/A 3/4 N/A 19 5 N/A 0.7500 N/A 9 1/2 N/A 241 N/A 2 1/2 N/A 64 N/A 5/8 N/A 15.875
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