radius turning attachment

[nickk]

i need to m/c some int' radii of 70mm[rad'] & wondered if any members knew one to recommend ,or even a redundant one to sell? thanks in advance.

 

[nickk]

am now thinking of making one as i only have 6 rads to m/c ,but still interested to hear other folks ideas.

 

[MattF]

One of the forum regulars made this for the purpose:

http://www.homemadetools.net/forum/ball-turner-metal-lathe-1288

He's made quite a few other bits of interest too, from what I recall.

 

[nodeward]

homemadetools.net has loads of these on there some are real simple to make might be worth a look

 

[MattF]

homemadetools.net has loads of these on there some are real simple to make might be worth a look

A good way to squander a few hours too, having a browse of that site. There's so many things on there which you never knew you wanted 'til you see them.

 

[aametalmaster]

One of the forum regulars made this for the purpose:

http://www.homemadetools.net/forum/ball-turner-metal-lathe-1288

He's made quite a few other bits of interest too, from what I recall.

Thanks for the good words..Bob

 

[Wendelspanswick]

What lathe do you have, I have a Colchester Student and I can do a 70mm int rad by swinging the compound slide with a short bit of tooling welded at 90 deg to the centre of a piece of square stock then clamped in the 4way tool holder.

 

[nickk]

What lathe do you have, I have a Colchester Student and I can do a 70mm int rad by swinging the compound slide with a short bit of tooling welded at 90 deg to the centre of a piece of square stock then clamped in the 4way tool holder.

good idea! & i suppose u alter the rad' by varying tool protrusion?

 

[Wendelspanswick]

Exactly, just wind in or out the compound slide, it won't retract enough to do external rads which is a shame.

 

[nickk]

sucess! wendels method wouldnt allow a small enough rad' so i made a replacement toolpost & set a carbide tip cutter the correct distance of protrusion from the pivot point,as i'm only m/c "acetal" i was able to swing the cutter manually. Photo to follow when i work out how to upload. Thanks to all who helped.