Failed inventions

Jul 15, 2003 11 Replies

I think gouges with deep flutes milled from round bar and HSS turning tools both arrived about the same time during the woodturning renaissance of the early 1980's. I have some deep fluted Sorby gouges that appear machined, not forged, from 'Sheffield steel'. They are of fine quality, but I don't think they are HSS. Probably there was a transitional period during which deep fluted gouges were milled from carbon steel? If true, can anyone give me a source for inexpensive carbon steel gouges milled from round bar? Why? Because I want to try bending a bowl gouge tip to finish the center of deep bowls. I know that there are such bent bowl gouges available, but I never see them mentioned here. Anyone have experience to share? Are they any better than a steep bevel on a 'straight' gouge or a scraper for getting at the center of a deep bowl, etc?



If anyone is still reading, I have twisted a skewed scraper so that the shaft lies flat on the rest and the cutting edge is presented to the wood at a shearing angle. You old f...s might remember those safety razors that twisted the blade so as to shear the whiskers when pulled across your face. As with bevelling the fluted side of gouges or using small engine valves for 'disc' scrapers, my twisted shear scraper (mind?) worked, but was not much of an advance. Guess I'll put them away with the vertilathe and the snorkle. ;) Arch



Fortiter,



Arch, Production toolmakers often used A-1 or air hardening steels. You'll have a helluva time forging this stuff. Before you buy, ask what kind of tools steel it is so you know what annealing, hardening and tempering to do. Dan

Arch, since you are only going to use a short portion of the flute, why not use a piece of oil hardening drill rod.

While it is still soft, mill or grind a short flute. Then forge the end to the shape that you want. You could also grind directly in to the the center of the rod about 3/8" from the end with a ball type grinding stone. You could create a "ice cream scoop" effect where no forging would be required. Just grind the end bevel and use with a toward the center movement to remove that high spot in the center of the bowl or box. The solid section of the rod will give greater stability when reaching over the toolrest and the section of flute "around the bend" will not be used any way.

snip

Arch

What's a "safety razor"? Am I showing my age?

A safety razor has depth control, unlike original straight razors.

A36 is mild (low-carbon) steel, not carbon steel.

See

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Many thanks for all the good advice; rcw is alive & well nourished. I see in my woodturning textbook, aka the CS catalog, that Dennis Stewart has a short length of 1/4" gouge cutter to use like an inserted bit @ $17.00. Should be easy to grind or cut off a piece of one of my bowl gouges and insert at an angle into Gerald's $1.20 per ft. 3/4" steel shank for less than $17 plus fun in the making thereof. Hoot, mon! Now someone please tell me how to use such a contraption. For aye, Arch

Fortiter,

Hey, Arch --

Robert Chapman, in his (excellent) book titled Woodturning: A Fresh Approach shows the use of such a bent gouge for keeping the bevel rubbing at the bottom of a deep, natural-edged bowl. I believe he also sells such a critter through his tool and accessory company, BCWA tools, which can be found at

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(?) I can't remember if his address ends with the British .co.uk or something other than .com...

Safe Spinning,

Brad Vietje Thetford, VT

Hi Gerald,

Your description seems very interesting ... I already used car shock absorbers but only for scrapers tools or the like ... It may also be fun to make a groove on one :-) But, since my English language is a bit limited, I can't understand what kind of tool you use to put your carbide burr in (what is a "tailed drill", in French if one knows the French word ?). Is it a kind of Dremel with a flexible ?

Also, how do you manage to cut a regular groove (= flute ?) if you do it by hand ?

Won't you have a picture of one of your tools ?

Thanks for any more explanation :-)

JYS

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