Thread: WIP: deep hollowing

I just scored a Sorby hollowmaster RS230(thanks Jim!), cant wait to try it out any hints on using one?

Originally Posted by Harry72

I just scored a Sorby hollowmaster RS230(thanks Jim!), cant wait to try it out any hints on using one?

I put a couple of degrees rake on mine and never looked back 'cos I couldn't make it work with the square edge it came with Mainly use it for shear scraping these days but it's still a top hollower to about 4" deep.

I put a couple of degrees rake on mine and never looked back 'cos I couldn't make it work with the square edge it came with Mainly use it for shear scraping these days but it's still a top hollower to about 4" deep.

I was feeling adventurous and put 5 or so +degrees on my knock off.

It ain't for the faint hearted..................... .............eeeeeeek

So yer reckon a slight touch up on the cutter angle helps, I'll keep that in mind.
Ive had a go with it, made a pot shaped thingy managed to get about 6" deep without much fuss(tool rest was in past the rim). I did notice that you need to keep the handle downwards so the cutter is in the upper quarter for it to cut, is this what you meant by increasing the angle on the cutter to help get cutter back to the centre area?
4" deep is that on a closed/narrow necked form?

Originally Posted by Harry72

So yer reckon a slight touch up on the cutter angle helps, I'll keep that in mind.
Ive had a go with it, made a pot shaped thingy managed to get about 6" deep without much fuss(tool rest was in past the rim). I did notice that you need to keep the handle downwards so the cutter is in the upper quarter for it to cut, is this what you meant by increasing the angle on the cutter to help get cutter back to the centre area?

Precisely! With a small entry hole it was too hard to keep the cutter high enough in the form. Cutting that high didn't feel natural to me either so I found it hard to tell where I was - proven by several forms that became donut and bowl sets

Originally Posted by Harry72

4" deep is that on a closed/narrow necked form?

4" was 'comfortable' - could go to 6" as you said but the ratio of handle to shaft is getting too close for comfort by that time

Have the underside of the tool on centre height or toolrest on centre height that way the cutter is above centre then you drop it down slightly to about centre height.

Originally Posted by joe greiner

I haven't noticed this problem. I mix my epoxy-and-coffee mortar heavy on the coffee, at least as much dry coffee grounds by volume as the already-mixed epoxy. The softer coffee probably degrades the strength to near that of the wood. Turquoise or metal filings/powder would be another story, of course.

Joe

Thanks for the tip Joe, sorry I was otherwise busy on the forum these days. I have been indeed much more sparing with the coffee, it goes with reason that increasing the amount should reduce the hardness.

Originally Posted by rsser

I must've been asleep at the wheel as the tenon is only marginally larger than the Powergrips fully tightened so in idle moments I've been pondering 'what if?'.

Axe wedges in the tenon? Will prob only widen the bottom.
Alum flashing for packing? May lead to slippage.

What does the brains trust think?

Ern, been there, done that. The way I fixed it was to cut newspaper strips as wide as the tenon, soak them with PVA and wrap them around the tenon to the required diametre. The chuck never knew the difference.

Good tip, F&E!!!

Yeah, thanks F&E.

Better than masking tape.

Ern ILL be going to the market sunday week i will find out if the guy who sells the ccd cameras has one with sound and if so how much .

Are you finished and lost inside that vessel!

I wish.

Lost to the demands of chores and family last weekend and mother's day promises a repeat. Cooking for 10 family members on Sunday.

Minor progress:

My spindle steady will in fact fit the form about half way or a bit further away from the headstock so that's a relief.

I now figure that my extended 5/8" home-made shaft for the Proforme hollowing head may well flex over a long overhang and have picked up some 3/4" rod - the max the Vicmarc hollowing tool support will accept.