Expand your internal machining capabilities with the Magnum Boring Bar Set 1/2″, a versatile 9-piece collection for metal lathes. This set provides varying bar lengths and angles to reach into blind and through holes for precision enlarging and profiling. The MAG-BB12S delivers the necessary rigidity and cutting geometry for professional-grade metalworking.
Features
- Multiple Lengths – Offers varied reach options for deep or shallow bores.
- Optimized Angles – Allows for machining to flat bottoms or cutting internal shoulders.
Specifications
- Shank Size: 1/2″ (12.7 mm)
- Piece Count: 9
- Supplier Part Number: 375-1306
- KMS Product Code: MAG-BB12S
Includes
- 9-Piece Set of 1/2″ Boring Bars
Common Shop Applications
- Enlarging existing drilled holes to exact non-standard dimensions.
- Machining internal steps and flat-bottomed blind holes on a lathe.
Recommended Shop Add-Ons
- Magnum Cutting Fluid
- Magnum Quick Change Tool Post
Frequently Asked Questions
Q: Do I need a specific holder for these bars? A: Yes, your lathe tool post needs to accommodate a 1/2″ shank, or you require a dedicated 1/2″ boring bar holder block.
Q: Are the cutting tips replaceable? A: The supplied data does not specify indexable inserts; standard solid bars require re-sharpening when dull.










