berger hollowing

[drh]

Does anyone use this tool and know the correct bevel angle to grind it at? Their web site says it cuts like a gouge with a 60 deg. bevel, so does that mean that's the correct bevel angle or does it just cut like a gouge at that angle?
Any other comments about the tool?

 

[Ed Davidson]

Are you referring to Soren Berger's hollowing tool - like this? If yes, buy Soren's sharpening jig and you can't go wrong grinding or lapping the preferred angle.

 

[drh]

Yes, that's the tool I'm referring to. I've made up a jig similar to the one shown, but don't have any information as to what bevel angle to sharpen at. The jig would lie flat on the bench grinder tool rest, but what angle would the rest be at??

 

[robo hippy]

I have had one for years, seen Soren demo them a couple of times, and still can't get them to work right. Kind of like the jitterbug, it plum evaded me.

robo hippy

 

[gkulibert]

berger tool

sharpen it by lining up the current bevel against the gringing wheel and just duplicate the grind that's already there. The angle of the grinding platform is not important as you twist the tool in the sharpening holder to match the bevel to the grinding wheel. I just helped someone use the tool yesterday. The key is to keep the tool parallel to the lathe bed in two axes. You need to keep the cutting edge on the side of the tool parallel to the wood so you are using the whole cutting surface. Then just twist the tool to change the bevel contact with the wood to make it more or less agressive.