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Boring Bar, 3/8" Indexable, 80 Deg HSS Diamond Inserts, A R Warner Kit #13

         Made in United States
Boring Bar, 3/8" Indexable, 80 Deg HSS Diamond Inserts, A R Warner Kit #13
Part Number: 4788
Weight: 0.53 lb

Price: $99.95

In stock
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  • 3/8" diameter, 5" long boring bar
  • 3 CEMW-21.5.5 high speed steel inserts
  • 1 extra Torx screw
  • 1 wrench


This Arthur R. Warner Co. precision boring bar uses high speed steel inserts. Combine the advantages of high speed steel cutting tools with the convenience of indexable tooling.

The minimum boring diameter is 0.330".

The Arthur R. Warner Co. is a family-owned American manufacturer of high speed steel products with specialization in cutting, shaping, pre-grinding, heat treating, and finish grinding of premium grades of flat high speed steel. Their quality is excellent and is proud to carry their products.

Chris' Tips

Chris Chris' Tips
Make sure you get the correct inserts and retaining screws for your indexable turning tools.

Our chart of indexable inserts shows which inserts and which screw to use with each of our indexable tools.

Here's a video that talks about high speed steel tooling.


Overall Length 5.0" (127 mm)
Minimum Bore .330
Lead Angle
Insert Relief 20°
IC 0.250" (6.35 mm)
Insert Thickness 0.093" (2.36 mm)
Insert Hole 0.110" (2.79 mm)
Insert Top Opening 0.146" (3.71 mm)
Insert Radius 0.008" (0.20 mm)
Screws CO-2205 S
Wrench T-7



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