Boring Bar

[TomG]

(12-23-2019, 09:50 PM)Cross Slide Wrote:

(12-23-2019, 09:46 AM)TomG Wrote: If you are boring a 1/2" hole with those boring bars, they are likely rubbing below the cutting edge. Sharpen them up and add a secondary clearance angle so the area under the cutting edge doesn't rub on the bore. For most jobs you would be better off with high speed steel bars instead of carbide. They are easier to sharpen and much more forgiving.

Another option I've used in a pinch is to substitute an end mill as a boring bar. You just have to orient it so a cutting edge is horizontal and on the center of the part.

Tom

Tom
I definitely want to get a boring bar that uses HSS. 
Is there any info on the angles to grind the HSS for a boring bar that you know of?

I would never have thought about using a End Mill. May have to try that in the future!

Trevor

The bars I'm referring to are solid HSS. As far as grinding them goes, it's the same theory as used to grind turning tools. You can look on my website (Toms Techniques) in the reference section for that information. Here is a link to a source for those boring bars:

Travers Tool

Tom