A brace chuck adaptor

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rxh

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Yesterday I made this adaptor for connecting a drill chuck to a brace to allow bits with round and hex shafts to be driven. The chuck came from a burnt out electric drill and is threaded 3/8” x 24 TPI UNF.
I have tried it out as follows;
- ¾” “wood “ twist drill in iroko,
- 15/32” “metal” twist drill in ¼” thick bright mild steel,
- 76 mm holesaw in melamine faced chipboard,
- 38 mm holesaw in hornbeam,
- 30 mm Forstner bit in hornbeam.
All worked OK. The big holesaw required quite a lot of effort to turn it but I think it is much safer than using a hand-held electric drill where a sudden jam can cause wrist injury. I found that a very sharp bit was needed for drilling the steel.
 

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Crikey. That's smart! Are you patent pending? Just a thought. Maybe you should be.
 
"The big holesaw required quite a lot of effort to turn it"....just out of interest, ........and i am interested, what sweep on the wheelbrace is it in the photo ?
 
Great job Richard =D>

Dovetaildave":2a7oeztk said:
"The big holesaw required quite a lot of effort to turn it"....just out of interest, ........and i am interested, what sweep on the wheelbrace is it in the photo ?

I'd say a No78 10" :wink:
Andy
 
Thanks for all your comments. The brace is a 10" sweep Stanley No.78.

I made the adaptor from 1/2" round barstock. I turned a "waist"and then a taper at one end and drilled an 8.5 mm hole in the other end. Then I filed the taper to a square section and tapped the thread. Before I make any more I want to devise a way of forming the square section without the effort of filing.
 
rxh":16lww543 said:
Before I make any more I want to devise a way of forming the square section without the effort of filing.

I can think of another way to get the square taper, but a forge, bellows, anvil, tongs and selection of hammers would take up more workshop space than a file...

Good excuse though, if you want to get into hot metalwork. ;)
 
I had a thought that my SDS to chuck adaptor might work but I get a wobble using a long (300mm) drill but it did did grip.

Pete
 
Brilliant idea very well executed rxh. Especially the file work. =D> =D> You can put me down for one too!

To go into "production" I guess the quickest & "cheapest" way would be to buy a mill. But I guess you know that already.
 
Someone was talking about shiny and nice to look at on another thread......I must admit to getting very carried away when it comes to the braces ( 14" recently acquired) and bits....especially the shiny shiny bits I've somehow acquired.

I'd be delighted to add a nice chuck to the collection.
P.S. Is it right that the extra length will help with getting it straight and true ?
 
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