Help please !
|John McCallum 1||10/12/2019 14:11:42|
29 forum posts
I have just bought a Mini lathe and I’m getting on with it quite well except........., I’m trying to face a 4” billet of Aluminium and cannot get a smooth finish, just chatter marks. I have checked the settings of the Lathe and all seems OK . I have tried both HSS and tipped tools but to no avail. If any of you can help I would really appreciate it. Any thoughts please make them simple, I’m 74
|Brian Wood||10/12/2019 17:19:21|
|2202 forum posts|
Maybe I am stating the obvious but you said billet so I hope you are using tailstock support and not relying on the grip in the chuck.
Some aluminium can be 'sticky' try using paraffin or WD40 as a cutting lubricant, it will assist in getting a turned finish. HSS is better suited to aluminium but is must be sharp
Don't cut with too deep a feed, that will just induce chatter, and try varying the turning speed to find something the lathe likes so that you produce turnings.
Regards Brian [I have a few more miles on the clock than you, but what does that count ! ]
I don't suppose I have covered all bases, but from similar problems made on the forum before these things are the ones that have most beneficial effect.
|Brian H||10/12/2019 17:56:39|
1671 forum posts
Hello John, the advice from Brian is sound but if you'd like me to pop over and see you, no problem as I live just the other side of the M1 from you,
If you look at the green banner at the top of the page, you will see a tab marked "Inbox". If you click on that then you will be able to send me a private message with your address and 'phone number and the message will not appear in this thread.
|roy entwistle||10/12/2019 19:26:08|
|1187 forum posts|
Try cutting from the centre outwards
|Neil Wyatt||10/12/2019 19:57:02|
17970 forum posts
Welcome to the forum. I read your thread title and thought "Alfreton isn't that bad..."
A couple of thoughts:
Use some sort of cutting fluid.
Make sure the speed is fairly slow, even with aluminium, try 200rpm or less.
Put a bar in the chuck and pull on it to check there isn't any play. If there is, tighten the rings nuts at the back of the spindle a little and check again.
Check all of the different slides are well adjusted.
It may be that you just have a 'sticky' alloy, do you know what one you have got?
|John McCallum 1||10/12/2019 20:39:15|
29 forum posts
Thanks very much for the messages and advice.
I will try to put the points raised into practice and report back.
|David George 1||11/12/2019 07:05:50|
1253 forum posts
Hi John welcome to the forum. Another local member I am just across the border in Nottinghamshire at Sutton. So if you need any help ask. There are a few around here who help each other if we get stuck.
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