9x20 Lathe Boring Bars
Last updated on Wednesday, November 21, 2012 05:37:32 AM Eastern US Time Zone

Boring Bar Sets, QCTP Boring Bar Holder, Sleeve Adapters, Boring Head in Tailstock, Boring Bars

Boring Bar Sets

Borite boring bar set (USA) that uses TPMM22_ carbide inserts. ½" ground shanks.


Carbide boring tool bit sets with precision ground ½", ¾" & ⅜" shanks.

QCTP Boring Bar Holder

This quick change tool bit holder also has a V-notch to hold a round (⅜") boring bar shank.
The setscrews mar the shank making it difficult to insert into precision holders e.g., a boring head.


This AXA quick change boring bar holder holds a ¾" shank tool.

Sleeve Adapters


This ⅜" round to ½" square, slit, steel adapter eliminates setscrew marring on the shaft. Shaft marring interferes
with insertion/removal when using a boring head. The hole was reamed for a close precision fit to a ground shank.

This supplied sleeve accessory adapts ¾" to ⅝" shanks for the quick change tool post boring bar holder.

A 3" long, steel, ¾" to ½" adapter. The hole was precision reamed & the single slit is ⅛" wide.

The left clamps hold the adapter body while the right clamp holds both the adapter & the boring bar shank.

For use on the 9x20 lathe.

Rigid holder & excellent boring bar performance.

A ½" to ⅜" boring bar adapter can be added for even smaller shanks.

 Boring Head in Tailstock

A boring operation at 637 RPM & using a fine feed. The cutting tip is at or above center.
A 2" diameter boring head with a MT2 (screw-on) arbor can be used in the lathe's tailstock.
A rigid setup with good control.

Boring Bars

Boring bar set: ⅜", (2) ½" , ⅝", ¾" & 1" diameters. ⅜" holds 3/16" round tool bits; others hold various sized
square bits. Each bar holds bits either perpendicular or at a 45° angle. Good for inside boring & inside threading.

Boring Bar Sets, QCTP Boring Bar Holder, Sleeve Adapters, Boring Head in Tailstock, Boring Bars

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