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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: Where to buy indexable tool tips
11/05/2010 22:50:36
As I now have my Barker lathe set up I am beginning to practice taking some cuts, experimenting with speeds and cut depths
 
Obviously I have made a few errors during these learning moments and have half broken one of the tools tips, the one one the knife tool
 
My set of tools are these:
 
I have messaged the seller but he has not responded. I took them along to the Harrogate Show but no one had any to match
 
They are square, measuring 10.2mm per side, with 0 degree relief and a single groove on the top side. They are secured by a detent mechanism, basically an upturned L which is locked by turing 90 degrees 
 
I have spent ages searching online but just can't find anywhere in the UK selling these tips
 
Can anybody help please?
 
John 
Thread: Advice for first time visitor to Harrogate Show
09/05/2010 09:35:26
Well my first Harrogate show was a very enjoyable visit. Loved rummaging through boxes looking for bargains and found a few. Got most items on my shopping list and wished I had bought more steel stock. Very friendly atmosphere and advice from stall holders
 
Can't wait for next year. Next trip to Leicester to visit son at Uni will have to include a drop in to the Arc Euro Trade  shop
 
Didn't meet anyone from here but there was another guy in a Kawasaki fleece the same as mine so maybe you all harassed him
03/05/2010 21:15:22
Ian
 
I'm a lot closer than that, only 68 miles away. Mind you I have enjoyed the delights of both the M1 and A46 roadworks when going to Leicester to deliver or collect my son from De Montford
 
And thanks for the tips which I will follow
 
John
 
03/05/2010 20:02:46
I agree there, get totally fed up with being accidently smacked round the head by backpacks while looking at exhibits
 
Either you must be bending down to view them or you are a hobbit, which brings a whole new perspective to my visit. Old men with long grey beards and a penchant for ale, hobbits, steam powered machinery presumably operated by orcs?
 
It's a Middle Earth convention isn't it?
 
 
John - keeping the script going (for a Jester's tear?) 
03/05/2010 09:17:28
Saturday's my planned day to be there as well
02/05/2010 21:34:52
Great. I'm going then. Will more than likely be wearing a Kawasaki motorcycle jacket and rucksack if anyone from here spots me! 
02/05/2010 18:21:26
Have received pass from SWMBO for leave of absence to visit the Harrogate ME show next weekend.
 
Primary reason is to buy some tooling and steel stock to help me get started. I'm almost there but need some silver steel for tools and have a long wish list after trawling the RDG and Chronos websites.
 
Basically will there be deals at the show? Being a motorcyclist I was used to the annual show at the NEC being a regular pilgrimage for good deals. But since 2000 everyone has commented that the deals are no longer (other than sellers dumping old stock) and the best prices are now to be had via the internet. As a result I (and many others) no longer go
 
As I will be more interested in tools for my machines rather than the models (heresy to admit on here I know but at the moment I'm on the first steps towards learning to use the lathe and mill rather than make models) will I still get some value out of a visit? Or should I stay home and just shop on the ol' t'internet? 
 
Mind you I might get to meet the esteemed staff from the magazine 
Thread: "Foundation" book has got me worried
02/05/2010 17:53:12
Posted by Terryd on 02/05/2010 11:21:54:
can I ask why you think that you have to wrap your machines in 'heavy cloths or blankets'.  I'm not sure about any advantage and I believe that there are many disadvantages in using textiles in this way.

 I suppose I was thinking that if I knew the temperature was going to drop, or for those periods where it would be low for long periods of time (winter), then they would serve to stop condensation forming on the machinery. I must be honest and say that I don't think my garage has a problem with this as there is never any on my other bits of metal. Cardboard and paper in there can get that "cold damp" feel after winter where it seems to have absorbed moisture out of the air. The Chinese pillar drill was a cheap one bought for an urgent job that needed doing. So the specks of rust on the column were to be expected.

 
I guess I need to buy a thermometer and monitor the temperature and put some background heat in there and check the machines regularly. They are both in pretty decent condition with hardly any rust. As I have just set them up I'm still learning about them and checking them so there may be more to find. I guess I'm more bothered about them being true and capable of making accurate cuts than looking like showroom condition.
 
 Thanks for all the advice. I shall try my best to follow it 
 
01/05/2010 19:29:59
Thanks for all the replies
 
There isn't really an option to build an insulated shell within the garage. I've just sorted it all out to make room for the lathe and mill and workbenches. So I have to work with what I've got. And The Boss will not let me do it, she'll want t to look like a garage.
 
So it looks like a good coat of oil to preserve the body of the tools and heavy cloths or blankets wrapped round them and secured with bungees for when the temperature drops. Some form of low power consumption background heating as well. The garage is well ventilated due to a large gap between the double door and the frame.
 
Due to a house extension build last year and an operation that's gone wrong, there has been no bike riding since July last year so sharing the space with hot motorcycles won't be a problem. Once I start again I'll bear the warning in mind. 
 
Thanks again. I'll read back through your posts and make some notes of what to do.
 
26/04/2010 11:43:12
Putting aside my luck in getting my subscription offer book pretty asap, life has turned a bit less rosy. About 40 pages in and on second mug of tea I came across the section on building your workshop.
 
Basically my option - brick built garage alongside the house - ranks marginally better than a terrorist cell in Khabul with "Al Queda Live Here" painted on the roof. It's uninsulated and not heated and now I'm afraid all my newly acquired kit (lathe, mill, accessories) and yet to be bought stock will rust away before my eyes. It's a double garage and has my motorbikes in as well.
 
Is there anything I can do to help matters? The bikes have never suffered but a small pillar drill has a bit of rust on the column. What about covering the lathe and mill up (blankets?) when temperatures drop and putting silica gel packets in with the steel stock? 
 
Once again thanks for any suggestions
 
John

Thread: Free Book Offer now on its way
26/04/2010 11:26:14
Posted by Flying Fifer on 25/04/2010 00:08:51:
Well John you`re what I call b*****y lucky !
 In some respects yes (first subscription issue and offer book) but in others, alas, no
e.g. buying bits for my lathe as a newbie which are subsequently found out to be the wrong sort (when I joined my local ME club and started asking questions) or won't fit (without modification)
 
But my lathe is now set up and working and I am finding what all the levers do and which way round things rotate!
24/04/2010 09:46:34
Mine was delivered by the postman this morning (24th)
Thread: Dilemma - neither lathe nor mill working
20/04/2010 21:20:34
Stub Thanks mate. Will do John
20/04/2010 20:24:14
Quick update.
 
The good news is the Lathe is now working. Had bought a 2.5" pulley from RDG and by taking a link out of the Nu T-link I got this to work. Currently giving me a range from low speed at 74rpm and a top speed of 650rpm
 
Bad news is the M8 x 1.25mm threaded rod doesn't fit. Seems the bolt I tried was ever so slightly on the larger side of 8mm and the threaded rod is on the anorexic side of 8mm and just pulls straight out. Testing the bolt again reveals it can be coerced out so looks like M9x1.25 is the one. Back to the shop!
 
20/04/2010 12:39:17
Thanks Terry and Frank
 
Two grub screws now on way to me from that nice bloke at Model Fixings. Also picked up a length of M8 x 1.25 from a local supplier
 
As an aside would this be a good boring head to buy:
 
 
It takes a 1/2" BSW thread (so that's another draw bar!) but could be used in the 3MT taper in both the mill and the lathe tailstock
 
Thanks again
 
John
19/04/2010 21:48:10
I could always get a bolt of this thread and pitch then cut to length and cut a slot in the top for a screwdriver. It's only to lock the drive pulley into the groove in the motor spindle so the force on it should not cause it to seize into the hole
 
A possibility if such grub screws can't be easily found?
19/04/2010 21:36:53
Which if I'm reading my Zeus book correctly is a BSW thread?
19/04/2010 21:28:43
"You might find a similar screw on the machine that you could borrow to check the thread with. Maybe a stop screw or something."
 
David and Terry. As we say in Yorkshire "Thar's reet clever buggers!" Well done
 
The cross slide locking screw fits. This is 1/4" dia by 20 tpi.
 
So where can I get one?
 

Thanks, John
Thread: Subscription and delivery of MEW
19/04/2010 20:28:24
Posted by David Clark 1 on 16/02/2010 20:37:00:
Please allow about a month from Friday for the book to arrive.
regards David
 
 Hi David
 
I've emailed you about this but not got a reply. When will the subscription offer book from issue 160 (Peter Wright's "Model Engineering - A Foundation Course") be delivered?
 
According to your reply above it should have been about the third week in March but still nothing
 
regards
 
John
Thread: Dilemma - neither lathe nor mill working
19/04/2010 17:17:11
Thanks for all the help to date. This weekend the lathe was moved to its final position and the milling machine was assembled on the bench
 
Now I have hit a real snag.
 
The lathe came with a Nu T-link belt and a cone pulley (2", 3", 4" and 5" pulleys). The grub screw in the cone pulley turned to cheese and I do not know what grub screw to buy to replace it. I only have metric bolts and I am sure this is imperial. I bought a new drive pulley with an adaptor for the motor spindle and a new V belt but I need to make a tensioner to take up the slack before I can use it. So the quickest way to get up and running is to get the old cone and belt working.
 
1. How do I find out the diameter and pitch of the missing grub screw? Where would I buy a replacement from once this was established?
 
Mill.  A secondhand Chester Champion. I had already bought a collet chuck and end mill & slot mill set for the lathe and the 3MT fitting fits the Champion. But the draw bar is different (I would have had to make one to use in the lathe anyway). The one in the mill is 11mm dia and fits the chuck that came with the mill. The collet chuck needs M8 x 1.25 pitch. As stated above I have no lathe (yet) to turn a new draw bar (and I would need to turn a metric thread on an imperial lathe with no 127t change wheel, which for a newbie like me is a daunting prospect!). Basically I need a draw bar that is M11 dia at the top to fit the mill but then M8 x 1.25 at the bottom (for 42mm worth of thread).
 
2. Quickest fix (bodge) for this could be to buy a length of threaded M8 x 1.25 bar and cut to the same length as the original draw bar. Two nuts at the top to lock a washer to mirror the original. I could weld the nuts together for extra strength. Does this sound a dumb idea?
 
Ahh, the journey of the newbie on the road to engineeringdom is strewn with stumbles so please bear with me. I though I was close to getting started but I am once again so far away
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