By continuing to use this site, you agree to our use of cookies. Find out more

Member postings for John Coates

Here is a list of all the postings John Coates has made in our forums. Click on a thread name to jump to the thread.

<< First < Prev 23 24 25 26 27 28
Thread: Beginners start here in Model Engineer
18/11/2009 21:06:21
Posted by David Clark 1 on 18/11/2009 19:58:19:
I was going to do a beginners special next year but it looks like it needs doing sooner in Model Engineer. Problem is, lots of Model Engineers' Workshop readers need the same information but I can't repeat it in both magazines.
 
 
 Ahh and there you have my dilemma as a beginner - which magazine do I subscribe to (Xmas pressie, possibly from me to me!)?
 
I am interested in the engineering aspects having just purchased a 5 x 24 roundbed lathe but my intent is to fabricate parts for my motorbikes to do conversions and a restoration, not make models. I've bought a vertical milling slide (for a Myford but it fits my cross slide) and collets and end mills and slot drills. I bought the Workshop Practice 5 book "Milling Operations in the Lathe". Personally I think it is more about the milling attachments that are/were available than how to mill in the lathe 
 
But first I've got to get my garage sorted where the lathe is going to go and then find a way of moving the blummin' thing. Must weigh at least 1/4 ton!!
 
John
Thread: Cleaning up corroded dials
18/11/2009 20:52:32
Thanks Chris
 
Those prices are a lot more within my family's budget for Xmas presents so I'll point them towards the Tee Publishing website   
 
In the meantime it's back to painting the garage where the lathe is going to go
 
John
 
18/11/2009 12:30:23
Frank
 
Had a look on Amazon for the George Thomas books - nearly £80 the pair! - so can see what you mean when "time and money allow"
 
My first plan of attack will be to restore the existing rather than replace with new
 
Thanks for the help guys
 
John
 
16/11/2009 22:07:36
Hi
 
My 1947 lathe has corrosion on the dials on the cross and top slides
 
I have had a little go with some emery cloth but it seems that when I have removed most of the corrosion the dial marks and numbers are very faint
 
Reluctant to proceed any further I wonder if there is a better way to do this or else is there a way of getting the dials remarked with new divisions (presumably these are 5 and 10 thou divisions) and numbers
 
Thanks for any replies
 
John
 
1947 5" x 24" Barker roundbed lathe
Thread: Drive pulley wheels and V belts
05/11/2009 08:09:50
Posted by Ian S C on 05/11/2009 00:45:20:
I was reading a site on Barker lathes last night and it indicated that changing from one ratio to the other was a rather tedious exercise,I think you know the site on Google.An interesting machine.You'll proberbly find one ratio suitsyou for most,and there it will staymost of the time.New-t-Lock and similar jointed belts are ideal for drive on lathes.IAN S C
 
I know the site as it is where I started my research. If I had the proper drive pulleys it should be easy as I would remove the wheel and replace it with the other one. But I have this Myford thingy and no jockey wheel to take up the slack.
 
This is why Plan A is to get two drive pulleys of the correct circumference to give me the reduction ratios against the mandrel pulley wheel. I will then get a V belt of the correct length to match each drive wheel or else fabricate a jockey wheel as mine appears to be one of the first Barker's and this must have been a later modification. I need a V belt because there is little clearance between the mandrel drive pulley and the casing but a V belt will sit nicely into the drive pulley.
 
The tedious exercise relates to changing the speed wheels as there are four of them. The lathe as I bought it has two speed wheels locked together on the mandrel to provide a direct drive from the motor. So at the moment I have no idea what speed the mandrel is rotating at but I have bought a speed sensor to measure it.
 
Thanks for the help everyone. I shall scour yellow pages for bearing suppliers
 

Edited By John Coates on 05/11/2009 08:10:24

04/11/2009 17:28:05
Hi again
 
Investigations into my Barker 5" x 24" lathe are progressing well. I have all the speed gears and all but one change wheel.
 
The drive system is another matter. The metal plate on the headstock detailing the speed gear settings says there are two ratios for the drive - 2:1 and 3:1 to vary the mandrel speeds and also the screw cutting pitch
 
The drive pulley on the electric motor spindle says it is a 2"/3"/4"/5" multi wheel unit (but there are only V pulley wheels for the first three sizes). I've seen these in photos of Myfords. A nutlock drive belt then connects to a  16.3" circumference drive pulley wheel on the mandrel.  This can be either locked to the mandrel or can drive the speed gears for speed reduction.
 
So to achieve the 2:1 or 3:1 ratios I need to change the pulley wheel on the  electric motor spindle to a circumference that will achieve these ratios. It also needs to have the correct sized centre hole and a grub screw. Where could I source two drive pulley wheels of the correct sizes to give the proper ratios?
 
Also, having realigned everything I find the nutlock belt is too thick and fouls the casing. I really need a V belt. Where is the best place to get these? I think I will buy two, one for each of the new drive pulleys, so I'll just swap the drive wheel and belt over when I change between ratios.
 
Thanks for any help
 
John

Thread: Any other Barker lathe owners out there?
03/11/2009 19:00:24
Well there's at least one other person out there with one
 
Thanks Pat - you've given me hope
28/10/2009 08:22:58
Hi
 
I have recently purchased a 1947 Barker 5" x 24" lathe. I am interested to locate and correspond with other owners to learn more about my lathe and what was standard (don't think mine is) and what modifications can be done
 
So far I have looked at lathes.co.uk and there must be two or three others around judging by the photos in Tony's article about the lathe (one of them is mine)
 
I got it because I need to do some fabrication for some motorcycle projects and thought it would be cheaper in the long run to learn how to use a lathe and make my own parts 
 
Plus - once you've got a lathe and can use a lathe, you've always got a lathe in case something else comes along, right?
 
 
regards, John
<< First < Prev 23 24 25 26 27 28
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
Shopping Partners
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