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Thread: Parting tool
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15th Apr 2019, 09:54 PM #16
As a novice, using a 9 inch Hercus, my learning is that a rigidly mounted blade is essential... and the only way it has worked for me is a rear mounted tool (upside down as mentioned) on a T slot cross slide. This has parted steel on Dad's lathe with little stress on me.
Any attempt to use a front mounted parting blade on Ali or steel is definately something I will not repeat.
Brass has been fine.
So what ever tool and holder, rigidity is number one... Then of course, on centre and sharp and appropriate lube.cheers
David
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15th Apr 2019, 10:50 PM #17Most Valued Member
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15th Apr 2019, 11:12 PM #18Banned
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Simple, cheap and effective. https://www.ebay.com.au/itm/6mm-Self...UAAOxyBvZTSJuF
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15th Apr 2019, 11:18 PM #19
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16th Apr 2019, 01:14 AM #20Senior Member
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16th Apr 2019, 01:18 AM #21Senior Member
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16th Apr 2019, 01:20 AM #22Senior Member
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I know my mini lathe is 8mm tool height but my AL350A is something weird like 14 or 16 mm. I'll have to check.
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16th Apr 2019, 11:06 AM #23Banned
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16th Apr 2019, 01:06 PM #24Senior Member
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16th Apr 2019, 02:13 PM #25Most Valued Member
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The tool may not be sharpened correctly or set correctly or there maybe an issue with machine ridgidity, is the tool cutting through the material okay or are you hearing or feeling a binding sound, are you parting with feed and using coolant, what material are you parting,and if under power what diameter, speed and feed are you using.
Is the tool set up to part close to the chuck?
Do you have minimal over hang of the tool?
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16th Apr 2019, 02:22 PM #26Senior Member
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The AL350A has a tool height of 18mm.
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17th Apr 2019, 10:47 AM #27
Tubal Cain,the American one, AKA Mr Pete has a U Tube video.
https://www.youtube.com/watch?v=w0N6K9y2i2M
It reinforces many comments made here, but worth watching.
Grahame
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23rd Apr 2019, 11:50 PM #28Senior Member
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26th Apr 2019, 04:46 PM #29Senior Member
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I already had a few of these blades in a bundle of stuff from a garage sale but not tested then until now. The tool holder came from china (ebay).
From memory it was 32mm aluminium I tried to part and it mangled both parting faces. Could hear the binding as it cut.
I don't believe there's any rigidity problem. It's a pretty solid lathe.
I always use WD40 or Inox on aluminium and always part as close to the chuck as I can get.
Can't use power feed at the moment as the lathe needs a new gear, teeth mashed a bit on the 40T.
It did have a bit of overhang by design of the tool, prob around 35mm to the tool tip.
I think I tried it on steel too hence the tool needs resharpening now.
The first picture depicts the blade profile before grinding.
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26th Apr 2019, 07:08 PM #30Most Valued Member
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The top surface is the wrong shape. You need to grind it flat.
Sent from my iPad using TapatalkChris
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