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Products > Cutting Tools > Boring Bars      

Boring Bar, 5/16" Indexable

Boring Bar, 5/16" Indexable
Part Number: 3719
Weight: 0.11 lb

Price: $38.95

In stock
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Related Products




  • Profiling bars for semi-finishing and finishing operations
  • Designed for CCMT 80° inserts
  • 7° Relief angle
  • Negative 5° Lead angle for boring
  • 3° Side & end cutting edge angle


This 5/16" diameter indexable boring bar uses CCMT inserts.

The boring bar is 4" long.

The minimum boring diameter is 0.437".

Use CCMT 21.51 or CCMT 21.52 inserts with this boring bar.

This boring bar does not come with an insert. You must purchase inserts separately.

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.


Overall Length 4" (102 mm)
Diameter 0.312" (7.94 mm)
Minimum Bore 0.437" (11.10 mm)
CCMT Inserts 80°
Replacement Inserts CCMT-21.51 or CCMT-21.52
Relief Angle
Lead Angle for Boring -5°
Side & End Cutting Edge Angle
Screw M2.5x8
Torx Wrench T-8



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