Boring Bar, 5/16" Indexable

Name: Boring Bar, 5/16" Indexable
Brand: ABS Import Tools Inc.
SKU: 3719
Price: 28.36 USD
Availability: InStock
Rating: 5.0 (5 reviews)

Boring Bar, 5/16" Indexable - Main image

$28.36 ~~$39.95~~ In stock

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.

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Express Shipping · United States: $3.99

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (5.0 / 5 · 5 reviews)

Mia ★★★★★ Oct 22, 2026

The CCMT inserts lock in solidly without any wobble, and the 4-inch length is perfect for reaching into deep bores on my lathe. I was surprised how cleanly it cuts even in harder steels right out of the box. Definitely the best small boring bar I've used for precision work.

Chloe G. ★★★★★ Oct 21, 2026

Finally, a boring bar that actually fits my small lathe tool post without hanging over. The 4" length and 0.437" minimum bore are spot on for the little brass parts I make, and the CCMT inserts drop in with zero fiddling.

Grace ★★★★★ Oct 20, 2026

Cut a few test bores in 1018 steel and the 5/16" shank held up without any chatter, even at the 0.437" minimum diameter. The CCMT inserts swapped out in seconds, which made dialing in the finish a lot less fiddly than my old solid bar.