By continuing to use this site, you agree to our use of cookies. Find out more
Forum sponsored by:
Forum sponsored by Forum House Ad Zone

Yet another parting-off question

All Topics | Latest Posts

Search for:  in Thread Title in  
Robin Graham20/05/2020 22:05:20
1089 forum posts
345 photos

Thanks for replies - it's been an interesting discussion, for me at least. My thanks to all who contributed.

I think that the short answer to my question is given by:

Posted by JasonB on 17/05/2020 11:58:20:

Posted by thaiguzzi on 17/05/2020 10:55:32:

Guys, the OP's lathe is a generic 12x36.

That is Colchester Student/Triumph, Harrison M300 territory.

All the above lathes inc the OP's should comfortably part off 3" OD Ally. And more.

We are not talking flat slideways Myford S7's here.

If i can do it on my weedy Boxford either with HSS or 3mm carbide tips from the front, there is plainly something wrong with the OP's tool, tooling or technique.

The lathe is comfortable with it but the OP is using a tool best suited to a smaller machine and smaller diameters, I note you are using 3mm and probably 26 or 32mm deep which as has been shown will be upto the job and already suggested by others

His question was "can I part 3" with the right tool", answer is that 3" can be parted with the right tool unlike the wrong tool he has, rest is up to him.

Edited By JasonB on 17/05/2020 12:00:40

So I shall buy a 3mm tool and see how I get along with that.

At the moment I don't want to go for a rear toolpost. The lathe doesn't have a slotted cross slide, so some surgery would be involved. It could be done of course, but given the size of lathe I have it seems that I should be able to do this conventionally with the right tooling and technique.

I'm iffy about parting under power - I had a phase of doing that, and it was wonderful when it worked, but catastrophic when it didn't. I like having the manual feedback. I've avoided some catastrophes (not the present one obviously!) by just 'feeling' how the tool is cutting and adjusting feed rate accordingly.

Ketan at ARC - thanks for the link to the previous thread about the parting tools you sell. Interesting reading. I'm sure that I'm not alone in welcoming 'inside info' about the way you test products before marketing - and I accept responsibility entirely for destroying the tool by pushing the NCIH 19-2 beyond your advertised limit. I'll order up a 3mm tool and try to break it.

Robin.

 

Edited By Robin Graham on 20/05/2020 22:05:54

All Topics | Latest Posts

Please login to post a reply.

Magazine Locator

Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!

Find Model Engineer & Model Engineers' Workshop

Sign up to our Newsletter

Sign up to our newsletter and get a free digital issue.

You can unsubscribe at anytime. View our privacy policy at www.mortons.co.uk/privacy

Latest Forum Posts
Support Our Partners
cowells
Sarik
MERIDIENNE EXHIBITIONS LTD
Subscription Offer

Latest "For Sale" Ads
Latest "Wanted" Ads
Get In Touch!

Do you want to contact the Model Engineer and Model Engineers' Workshop team?

You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.

Click THIS LINK for full contact details.

For subscription issues please see THIS LINK.

Digital Back Issues

Social Media online

'Like' us on Facebook
Follow us on Facebook

Follow us on Twitter
 Twitter Logo

Pin us on Pinterest

 

Donate

donate