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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.

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Thread: Just wanted to say thanks
09/04/2010 20:44:24
Being a newbie and having asked many questions since getting my lathe and now a mill to go with it, I would just like to express my sincere thanks and gratefulness to all the replies offering advice, answers and support to my endeavors.
 
You are all great folks and generous with your time in responding to my questions and pleas for help.
 
Although my knowledge is increasing with your help I reserve the right to keep asking until I am a guru like many of you here
 
John
Thread: How big to make a chip tray?
09/04/2010 20:39:42
UPDATE
 
As I started to create the workshop space for the lathe and mill in my garage in earnest this week, one of the tasks was to put up some Dexian shelving. Well, having put up what I need, I find I have a surplus of this now and it looks like one of the shelves could make an excellent chip tray as I have two or three sizes to choose from, the largest being 800 x 600mm
 
Result !
Thread: Re-wiring a forward/reverse switch
09/04/2010 20:36:06
Hi David (Engine Builder)
 
Message sent with my email address. Thanks
 
As I am a Beginner in many things, not least electrical testing, when I follow Les' advice and connect the red and black motor wires to check for continuity, when I show a reading (i.e. continuity)  does this mean I have found a matched pair from either the start and run winding?
 
I will be using a Gunson automotive multi-meter (as that's all I have)
 
Thanks ever so much every one for the help thus far. I must say everyone is fantastic on here and tolerant of endless questions from newbies like me, and as helpful as my motorcycle owner's club website with the technical stuff
 
John
Thread: Drive belt tensioning dolly wheel
07/04/2010 22:04:41
Thanks Keith
 
Would've helped if I had known to call it a "jockey" rather than a "dolly" !
 
John 
Thread: Re-wiring a forward/reverse switch
07/04/2010 22:02:44
Hi David
 
Yes it is a Dewhurst Type A
 
Apologies for my typing mistake. It is both earth wires that are attached to the casing
 
regards
 
John
Thread: Drive belt tensioning dolly wheel
07/04/2010 20:51:09
I have replaced the drive belt on my lathe with a V belt (was Nu T-link) and new drive pulley
 
There is some slack in the belt I want to be able to tension out with a dolly wheel much like the one in the 8th photo on lathes.co.uk:
 
 
I am trying different drive pulleys on the belt spindle to see how they affect the mandrel speed

But I have tried to Google such a device and can't find anything similar. The wheel is causing the main problem - as to where to get one. The arm will be a small piece of steel with the bolt fixing through the case at one end and the dolly wheel at the other with some sort of bearing to let it rotate
 
Any help appreciated
 
John
 
Thread: Re-wiring a forward/reverse switch
07/04/2010 20:24:10
My Barker lathe has one of these fitted. No matter how I have a go a swapping the wires round, Reverse is "normal" i.e. rotating downwards towards the cutting tool, and Forward is "wrong" ie. rotating upwards
 
I know that looking from tailstock to headstock Reverse and Forward are correct in that Forwards is clockwise and Reverse anti-clockwise, but I would just like to have it seem more natural with regards to the mandrels rotation towards the cutting tool
 
Anyone have any experience of this switch ?
 
There are two cables from the single phase motor (don't ask me what it is) entering the switch on the Reverse side and a single cable for a normal plug entering on the Forward side. Neutrals for both wires are connecting to a bolt fastened to the casing
 
If the Forward side (left) has connections A through D going down vertically, and Reverse (right) has 1 to 4 similarly then the current wiring is:
 

A - red (plug cable)
B - red (motor cable)
C - black (plug cable)
D - unused
 
1 - red (motor cable)
2 - black (motor cable)
3 - black (motor cable)
4 - unused
 
Thanks for any help

John
Thread: How big to make a chip tray?
05/04/2010 19:05:13
Just bought a Chester Champion Mill to accompany my Barker lathe
 
Whereas the Barker has a chip tray (albeit with a square missing from one corner due to a brick pier in the previous owner's garage or shed but my brother in law can help me weld in a patch) the mill doesn't so I think I'll get one made for it before I bolt it to the table
 
Question is - how big and what thickness steel ?
 
My brother in law should be able to help me get the sheet steel and cut and weld the corners
 
Thanks guys
 
John
Thread: For Sale section - can't choose groups
29/03/2010 20:13:56
And the fix is ............... Firefox on Ubuntu Linux
 
Sets the page out properly and I can choose the groups I want to peruse
 
Lithesome Linux   1
Bloaty Bill Gates    0
29/03/2010 12:33:47
When I go into the For Sale section the links to particular groupings eg. drills, lathes etc are overlaid onto the posts for individual items
 
The mouse pointer can't pick these out so I only have the choice of about six individual items that are shown in a list, where these do not clash with a grouping eg Drills (2)
 
The mouse pointer can pick out and open the links above eg. Magazines
 
Consequently I can't open and view the groups for items I am interested in
 
Wot iz occuring dude?
 
Oh it's IE 7.0 on WIndows at work I'm using. Will see if the problem is repeated at home with Firefox on Linux
 
Thread: Thread dial indicator
24/03/2010 19:44:26
Posted by mgj on 24/03/2010 18:11:37:
Mr Coates sir - you will find that it does make a difference as to whether its a rack or a worm. Or can do, depending on the accuracy you want.
 
Forgive my newbieness mgj
 
I haven't encountered racks thus far in my reading but I will go and look for them now
 
TBH most times I read detailed replies on here I go running off to the books to try and understand what you're all on about. Problems of discovering lathes late on in life (45) and having to catch up with 20+ years learning you lot have on me
 
I'll probably be a permanent resident of the Beginners section
24/03/2010 12:43:25
Once again a fantastic response for a newbie like me to digest. It'll take a thorough reading of some of my Workshop Practice and Geo Thomas books to understand all of what you guys have said. Went a bit off topic on the racks issue though I thought !
 
Keith - thanks for the offer of the article which would be gratefully appreciated
 
DC - thanks for this site btw which has become my daily fix during work's lunch hour and of an evening. The mag is excellent too and I am enjoying my subscription
 
I must admit I don't know whether to invest in all the back issues of MEW that are advertised as I have bought both Geo Thomas books (and will be buying the UTP and VDH kits as my first foray into lathe work) and about half of the Workshop Practice books plus the Sparey book. Would they be a worthy addition as it looks like it will cost about £1 per issue so that's £159 I would be in for?
 
As an aside, having bought the Barker as a total newbie and not quite knowing what I was looking at (which is why I will probably forever be posting in the Beginners section on here) I really enjoyed the article in this month's MEW about installing the Chipmaster lathe. Once my over cluttered garage is sorted out to make space for the Barker I am really looking forward to getting it set up and starting to practice some of the tutorials in all the books I have bought and from MEW. I found the article a real inspiration and motivation. So thanks for that Dave !
22/03/2010 12:52:03
Had a snoop around my Barker  x 24 lathe this weekend, cross referencing to the pictures from www.lathes.co.uk. It's not set up yet but I am sorting the garage out for its eventual home.
 
It would seem that the Barker originally had a thread dial indicator. One of the lathes in the pictures has it clearly visible but the other two lathes do not have one. Mine is one of the other two. There is the mounting on the lathe saddle/apron to accept a thread dial indicator.
 
Now first impulse was to go off to eBay to see if there was one there. Of course there is stuff all for my Barker but there were a couple for Myfords. Having been burnt before in buying stuff and thinking it will fit I held back from bidding or buying it now, afraid I would end up with something that would not fit.
 
Having spent some time reflecting, it would seem that these should be relatively easy to make (you can see why this is in the Beginners section can't you!). They seem to be a tube fixed to the saddle/apron, with a rod inside which is threaded at one end to mesh with the leadscrew and with a dial numbered 1 - 4 at the top end.
 
As the chance of finding an original Barker thread dial indicator is less than Lord Lucan turning up astride Shergar, have I understood the construction of one of these devices correctly? Not having one to hand I am guesstimating from the photos on eBay and lathes.co.uk
 
Thread: Digital editions of Model Engineer and Model Engineers' Workshop.
17/02/2010 08:21:14
Posted by LADmachining on 14/02/2010 08:05:44:
All of the back issues of MEW (1-160) are available to me when I click on ''Digital Issues' under 'My Account'.  In the list of pages that appear (small boxes at the top of the page), current MEW's run from page 5 to 7.  Part way down page 7, the digital MEW subscription starts under the heading 'Model Engineers Workshop Archive Subscription'.
 
I can only see 122 onwards. Anyone know why this is so?
Thread: Subscription and delivery of MEW
15/02/2010 20:28:00
I subscribed early Feb 2010 (3rd I think)
 
Issue 161 plopped onto doormat today

Now looking forward to the book from the subscriber offer

Excellent !
Thread: Drive pulley wheels and V belts
01/12/2009 08:28:44
Update on this one
 
Went to a local supplier recommended by my club secretary. They have been really helpful, exchanging drive pulleys and A belts that didn't quite fit (or they wrongly ordered!)
 
Upshot is I can have several different drive pulleys as they sold me a 5/8" hub that can accommodate different sized pulleys. Everything has been chnaged so that it can use an A belt as well.
 
So I am well chuffed. And they were cheaper than eBay or RDG Online etc
 
Result
Thread: Grub screw has turned to cheese!
25/11/2009 18:08:49
Posted by Circlip on 25/11/2009 11:40:52:
Hmm, since Mo and Curly have jumped in, here's Larrys take. 6.5mm X 1.25 P sounds awfull close to 1/4" X 20 TPI.??
Which given the fact it is a 1947 lathe is probably the case although the cone pulley must have been a "modification" by a previous owner
 
I have yet to get a BSF Whitworth screw pitch gauge - its on the Xmas present list!
24/11/2009 21:30:32
On my lathe was a non-original cone drive pulley located with a grub screw. Having got a new pulley I went to remove the cone pulley and for some reason, the grub screw was steadfastly stuck and the slot head rapidly turned to cheese. Only a screw extractor got it out!
 
So now I have a cone pulley sans grub screw and a new pulley that won't go fully onto the motor drive spindle (maybe either the casting or the motor spindle isn't true). So doing anything on the lathe is out
 
The grub screw is/was a 6.5mm bolt of 1.25mm pitch. This now has a mangled head and a hole part way through it
 
So what are my options? I could try and drill more of a hole in the old grub screw and see if a small allen key would work with it. Or can you buy grub screws from somewhere?
 
If I use the old grub screw it will get well lubricated before it goes back in the hole again!
 
Your help and advice will be well received
 
John
Thread: Beginners start here in Model Engineer
18/11/2009 21:51:56
Workshop looks like the likely candidate to replace my Linux mag then
18/11/2009 21:36:25
Posted by David Clark 1 on 18/11/2009 21:25:45:
I would subscribe to Model Engineer.
Then you can buy Model Engineers' Workshop from Smiths.
 
 
Hi David
 
I have a wife to spend my hard earned wonga without you giving her a hand!
 
Seriously though is Workshop more about tools and practices and the other one more about plans, trains and steam engines? Only guess this looking at the compilation special that is advertised elsewhere
 
John (heading towards pennylessness)
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