Gallery, Projects and General > Oooops!
Novice question Re lathe
hopefuldave:
Some good points re tool sharpness, and recommendations for YouTube videos, Mr Pete has produced some good beginner's tutorials.
Beyond that.... More info please! What lathe, tools, workpieces and what rpm, depth and feed of cut, etc.? What's the length/diameter ratio of the work, long slender workpieces will need extra support to avoid chatter/vibration and a poor finish, etc.
piper1:
--- Quote from: Pete. on August 26, 2013, 02:08:09 PM ---Whenever I get a poor finish it's almost always that I ave got the cutting edge wrong when grinding my tool. You can get all the angles right but have a slightly dull edge - a tiny slip on the grinder - and it just won't cut. I use a 30X loupe to inspect them now and you wouldn't believe how rough a 'perfectly good looking' edge can be.
--- End quote ---
Thank you for your reply but I'm not that advanced to be able to re-sharpen my tools at the moment so the probability of them being blunt tools is high.
I know that this is something that I need to learn how to re-sharper cutting tools sooner than later.
I really need to get myself of some sort of course.
piper1:
--- Quote from: hopefuldave on August 26, 2013, 05:40:26 PM ---Some good points re tool sharpness, and recommendations for YouTube videos, Mr Pete has produced some good beginner's tutorials.
Beyond that.... More info please! What lathe, tools, workpieces and what rpm, depth and feed of cut, etc.? What's the length/diameter ratio of the work, long slender workpieces will need extra support to avoid chatter/vibration and a poor finish, etc.
--- End quote ---
Thank you for the reply
The lathe is a Smithy mill/ drill lathe CB-1220-XL
At the moment I'm trying to make Drip tips out of 10mm SS and Brass rod, pretty much able to achieve the aim but the quality of the finishes is poor and requires lots of sanding.
The tools are very similar to these.
http://www.ebay.co.uk/itm/360423893257?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2648
Speed, sorry for my ignorance I don't really know.
colin563:
I struggle sharpening tools as I've only got the use of one arm
My solution was the diamond tool holder from eccentric engineering really easy to do
But the tool is on the expensive side but it does work as good as the video
Cheers Colin
garym:
--- Quote from: piper1 on August 27, 2013, 03:58:47 PM ---
....The tools are very similar to these.
http://www.ebay.co.uk/itm/360423893257?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2648.......
--- End quote ---
I'm a relative beginner also, but from my limited experience I would say there is a good chance it could be the tools. When I got my mini-lathe about eighteen months ago I had similar problems with the finish, even on free cutting MS. I wasn't confident with grinding my own tools but after lots of encouragement on another forum I had a go and was amazed that my first attempt gave a better finish that the purchased ones. Since then I've ground all the tools I've needed apart from a small diameter boring bar which I couldn't get right so bought an insert-tipped one.
Gary
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