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Member postings for Stewart Hart

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

Thread: Small drill bits, <<1mm
06/07/2020 09:20:16

Use to do a lot of small hole drilling at work we always used Titex drill from Germany there expensive but are very good. some followed me home. I've tried the cheep Chinese stuff and they are rubbish some of the sets you can buy at shows are not too bad, some one in China must make good small drills with the stuff that they make I guess they keep them for them selves.

Small drill really need high speeds to work really well so why not make a high speed drilling attachment like this one I made

Stew

Thread: pottyengineering universal tool post fixture
05/07/2020 07:21:01

Hi Just completed a universal tool post fixture, it uses a commercial spindle bought of the internet, the video is quite long so I hope you don't get bored with it

Stew

Thread: Lamp Post Engine
04/07/2020 08:31:09

I Like that very much

Stew

Thread: Starrett type clamps
21/06/2020 14:51:40

Wow Andrew they look superb the black finish really sets them off. How did you degrease them for the blackening process

Stew

Thread: Wot's this for ? help please
17/06/2020 11:40:23

Hi Chaps

I think Jason is correct its just a crude spacer to go between spacer and pulley to take some of the thrust, as for the other end I'm going to fit a sleeve between the slightly larger collar diameter and the bearing locating on the inner race this should take up the thrust, I'm unsure wether to fit another spacer between the two bearing again on the inner race so that they share the thrust. I want to see just what duty these spindle will do, there's a few videos of them in use doing light work.

Just what I'm planning to do with it you'll have to wait until next week some time when I've got the fixture completed I'll post a video of it in action hopefully:- its another bit of pottyengineering devilry devil.

Stew

17/06/2020 09:51:31

Hi Jason

I was thinking it was something to do with end thrust the shaft is a tight fit in the bearings but I cannot see how end thrust when drilling will be restrained I’m intending to use Loctite to fix the bearings better and ditch the clip

Thanks for your input chaps

Stew

17/06/2020 09:29:14

Hi Brian that was my thoughts but it’s a lose fit on the shaft there’s no groove on the shaft or in the bearings for it to fit the bearings which are flanged are fully home

Stew

17/06/2020 08:58:17

I bought a spindle and drive belt for a project I'm developing as part of the kit there was a small "C" clip that I can't for the life of me work out where it goes see attached picture, its got something to do with the bearing assembly but that's as much as I can work out there is no obvious place for it to go. Can any one shed a bit of light on this mystery

Stewdsc03824.jpg

Thread: Starrett type clamps
16/06/2020 19:12:17
Posted by Andrew Entwistle on 16/06/2020 19:05:15:

Hi Stew,

Thank you for sharing your design and build log. I found that attaching the two pieces of stock using cyanoacrylate resisted all milling operations and a few minutes in boiling water breaks the bond when required. Instead of welding the knurled knob onto the leadscrew I used Loctite 638 bearing retainer into a slip fit, which has never failed, even on the crankshaft of my power hacksaw.

Andrew.

Thanks for your feed back and tips Andrew I never thought about sticking them together I've experimented with two way sticky tape but with mixed results:- loctite 638 is certainly good stuff and will hold the knob in place my welding them in place is a good example of over kill. Any chance that you could post a picture in the thread of your clamps

Stew

15/06/2020 08:30:17

Thanks for all your interest in these clamps chaps

I actually used imperial bar so 5/8" is indeed 15.88mm I'm sorry this may have confused a few of you. But its your workshop so your free of the chief inspector you can make things to any size you want as long as you exercise a little gumption.

I use the metric system for one simple reason:- its the industrial standard for most of the world this makes metric tooling and parts extremely cheap when compared to imperial stuff a fact that is very important in most home workshops.

I try to make all my designs simple and cost effective for the beginner as Jason said, but I do find it difficult at times getting thing down to the beginners level, especially that these days youngsters are taught very few basic practical skills, consequently things us oldies think are obvious go over peoples head. My own son whose a medical doctor phoned me up the other day for advice on how to shorten a curtain rail using a hack saw. I had to explain to him the different types of saw how to tension the blade and how to keep the cut straight. I can assure you that he didn't have a neglected childhood, like may of his peers he just wasn't interested in engineering thing, but he did ok despite this.

Stew

Thread: 2-6-0 Horwich Crab
22/05/2020 20:35:00

Hi

I think I used primer on my first loco it’s stood up to many steaming I do know I was very careful to get everything cleaned and oil free using a gunk type solvent and white spirit

Stew

22/05/2020 18:26:59

Thanks for your comment old mart

Greensands the smoke box is not painted it’s made from welded seam mild steel I think it must have been hot rolled hence the black surface. For my other loco I used black engine paint from Halfords on smoke box and chimney just two coats. For the tender and rest of the loco the brass gets a coat of acid primer followed by two coats of precision paint followed by two coats of clear lacquer from hobby craft I use a wide soft artist brush again fresh hobby craft I can’t get on with spray cans. I try to do one face at a time keeping it horizontal to reduce the risk of runs it takes a long time doing it this way but it’s the only way I can avoid runs

Hope this helps

Stew

 

 

 

Edited By Stewart Hart on 22/05/2020 18:34:04

22/05/2020 07:54:57

Time for an update, this lock-down has certainly speeded things up:-

Chimney, Smoke box, door and saddle

dsc03710.jpg

Trimming smoke box to length

dsc03713.jpg

Smoke box saddle fabrication

dsc03721.jpg

Completed smoke box door

dsc03760.jpg

its begining to look like the finished loco now

dsc03770.jpg

Stew

Thread: Simple Mill Engine - Stewart Hart ME.4460 - Part CP11
14/05/2020 20:28:54

Well Done Jim a great runner I hope you enjoyed the build

Stew

Thread: How are your clubs responding to Coronavirus
18/03/2020 06:46:23

South Cheshire MES has cancelled all Birthday Parties, Public Running and club meetings until further notice.

Thread: Coronavirus
08/03/2020 10:47:20

My Grandmother once wrote to Winston Churchill on Izal toilet paper to complain about the meagre widows pension apologising to the great man for using toilet paper as she couldn't afford proper writing paper. laugh

Stew

Thread: Locked out of computer
15/02/2020 09:36:58
Posted by Robert Atkinson 2 on 15/02/2020 09:06:07:

What computer? What operting system?

Desktop / Laptop /All in one?

PC / Mac / Linux

Make and Model

OS version?

With this information we can give you some checks to do.

Robert G8RPIIt’s a Asus PC had it for more than 5 years Windows OS by the sounds of it it’s gone to the big shop in the sky

15/02/2020 08:40:17

I was looking something up on the banggood site this morning when the screen went blank and briefly flashed locking and everything went dead and I Just can’t switch back on 😭any ideas about what has happened have I caught a virus I have Norton protection

Stew

Thread: High Speed Drilling Attachment by pottyengineering
01/02/2020 12:45:14

Hi George

I've been puzzling about that also I did this check on alignment

dsc03702.jpg

And everything looked good, so I'm wondering if I got the drill slightly of centre in the chuck with those small drill its easy to grip it with just two jaws I was also wondering if centrifugal force was whipping the point out, though that doesn't seem to happen when I had it in the mill. It didn't seem to effect it much though.

Thanks for your interest

Stew

31/01/2020 18:37:04
Ok as promised the video of the high speed drilling attachment in action
 
Enjoy
Stew

Edited By Stewart Hart on 31/01/2020 18:38:48

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