Products for bench top machinists | LittleMachineShop.com

Boring Bar Set, 3/8" Shank, HSS

Boring Bar Set, 3/8" Shank, HSS - Main image
$71.96 $99.95 In stock

This high speed steel 8-piece boring bar set includes three different length boring bars each for minimum bores of 5/16" and 3/8", and two boring bars for minimum bores of 7/16". The bore depth ranges from 3/4" to 1-11/16".
The boring bars are made from M35 5% cobalt high speed steel.
The shanks are held to 0.000 to -0.0005" from the nominal diameter.
The stand may vary from that shown in the photo.

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Customer Reviews (4.8 / 5 · 5 reviews)

Miles ★★★★★

Finally, an 8-piece set that actually covers the smaller bore sizes—the 5/16" minimum bore bars have been perfect for my tight spots. The HSS edges held up through a dozen stainless passes without chattering, and the three length options give me the reach I need.

Aurora ★★★★★

The 7/16" bars are perfect for opening up wrist pin bores, and having two of them means I'm not swapping tooling mid-job. The HSS holds an edge well even on mild steel, though you'll want to touch them up on a grinder before the first cut.

Edward I. ★★★★★

I've been using the 3/8" shank bars on small aluminum parts and the HSS holds an edge way better than the cheap set I had before. Having both the 5/16" and 3/8" minimum bore sizes in one case means I'm not digging around for the right bar mid-job.