By continuing to use this site, you agree to our use of cookies. Find out more
Forum sponsored by:
Forum sponsored by Allendale Jan 24th

Optimum products?

All Topics | Latest Posts

Search for:  in Thread Title in  
Vic21/10/2020 13:41:29
2645 forum posts
20 photos

I read a short piece some time ago by a guy who worked in China, that they like to save money whenever possible and will not replace measuring equipment like temperature probes etc as often as they should. As a result basic materials like steel and iron may not be up to specification. Obviously if the material is for critical engine components etc then hopefully it will be properly tested before too many components are made from it. I somehow doubt this happens for things like hobby machines though.

Neil Wyatt21/10/2020 18:31:29
avatar
Moderator
18325 forum posts
718 photos
77 articles
Posted by Ian B. on 21/10/2020 08:04:07:

Oh and I notice from an earlier post I wa not quite definitive in my comparisons. Hence:

Chester Conquest 14" between centres weight 42 kilos.

Warco/Weiss WM180 12" between centres weight 63 kilos

Colchester Bantam 20" between centres weight 499kilos

(Latter partially stripped for moving house twice).

Hope that clarifies the stark reality and differences.

Regards

Ian.

Deflection of a beam varies as the third power with length.

Taking the ratio of centre distance to the power of 3 to overall weight makes the differences much less dramatic:

65:27:16

OK that's a crude measure, but a first approximation it's reasonable - especially as I haven't made any reduction for centre height. Note also that these machines are not intended to perform the same duties (and also that a large part of the weight in the colchester is in its stand).

Edited By Neil Wyatt on 21/10/2020 18:32:20

Alan Ambrose22/10/2020 13:26:17
8 forum posts

Nice Just for grins, I've been calculating cost/Kg of various lathes & mills I'm getting numbers generally between 10 & 20 £/Kg.

Maybe cost / specific stiffness next (never mind the quality)?

Michael Gilligan22/10/2020 16:31:59
avatar
16674 forum posts
727 photos
Posted by Alan Ambrose on 22/10/2020 13:26:17:

Nice Just for grins, I've been calculating cost/Kg of various lathes & mills I'm getting numbers generally between 10 & 20 £/Kg.

Maybe cost / specific stiffness next (never mind the quality)?

.

Today’s scrap value for Iron is about nine pence per Kg

... so now you can work our what manufacture and distribution are worth, and guess the profit margins devil

I would like to think that the skilled labour and/or high precision machining centres represent a significant portion of the purchase price ... but who knows ?

MichaelG.

Dave Wootton22/10/2020 17:17:04
86 forum posts
8 photos

I didn't really want to get involved in any arguments, but, as a long time user of Colchester and similar industrial sized lathes, both at home and at work, I thought I would add just a few comments based on experience of using a Warco GH1322 lathe in an industrial setting over a period of over five years. probably 15-25 hours a week on all manner of work, most of which would equate in model terms to that involved in a large scale traction engine.

I reacted in horror when told that I was to be put in a satellite workshop newly equipped and on turning up found a Warco lathe and Bridgeportish clone mill. Despite my protestations I found after a couple of weeks I liked both machines, they were capable, accurate and rigid. Lots of screwcutting, press fits, intermittent cuts on fairly lumpy castings and fabrications the Warco coped with it all. the three jaw chuck was as accurate as any and was still good when the place closed down in April. So despite not being as well finished as some, it did the job under difficult conditions, always someone asking how soon can we have.....

Not wanting to start any rows but I did want to point out that these imported machines, may be lighter built and not as well finished, in my experience of this machine it actually did the job, which in industry is what matters.

I worked at a firm in the early 1980's that took my war finish big old Holbrook lathe and replaced it with a new Colchester Triumph, The Colchester could never achieve the finish of the Holbrook, I missed that lathe terribly.

I think I'm reasonably unbiased I've got a Bantam 2000 at home.

I'll go and put me tin hat on!

Dave

Edited By Dave Wootton on 22/10/2020 17:20:08

Edited By Dave Wootton on 22/10/2020 17:20:42

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

Latest Forum Posts
Support Our Partners
EngineDIY
Eccentric July 5 2018
Warco
cowells
ChesterUK
emcomachinetools
Eccentric Engineering
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