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Member postings for David George 1

Here is a list of all the postings David George 1 has made in our forums. Click on a thread name to jump to the thread.

Thread: Machining cylinder from solid
13/06/2020 08:35:36

On this type of milling I have an angle plate which is square on all sides and edges so that I can rotate the angle plate and clamp it in various positions without removing the piece bolted to the angle plate. I can clamp a piece, mill one side, rotate the angle plate and then bore a hole or drill knowing that the axis are square and it is easy to clamp an angle plate in various positions. I have drilled many holes in it to suit the job in hand but it works many times.

angle plate.jpg

David

Thread: Parting off
12/06/2020 07:11:26

A rear toolpost is the way to go especially if you have a quick change toolpost. The forces on a tool when parting off have a different direction to turning and can be held better with a more solid rear toolpost. I made one for my lathe and wouldn't go back to front mounted one. Here is a couple of pictures of mine.

20190316_144251.jpg

I can unclamp the top and just slide it in and out to suit job and it is still on center.

20190316_164659.jpg

David

Thread: Evening all
08/06/2020 07:07:43

Hi Andy welcome to the forum. What are you interested in making. I have a similar size mill but diferent make and make lots of bits.

David

Thread: Finnished prodject during lock down.
07/06/2020 17:24:24

I started building this on another post on how to silver solder the boiler.

https://www.model-engineer.co.uk/forums/postings.asp?th=161241

I also did a post on building the wobbler you can also  look at my pictures in wobbler file in my Albums.

https://www.model-engineer.co.uk/forums/postings.asp?th=155001

David

Edited By David George 1 on 07/06/2020 17:33:47

Edited By David George 1 on 07/06/2020 17:36:50

07/06/2020 14:10:36

Hi just a few pictures of my wobbler steam engine that is finnished at last.20200607_082932.jpg

20200607_085836.jpg

20200607_123203.jpg

20200607_123230.jpg

I made the brass cover for the boiler and fitted it. Except for the brass being too close to the outlet valve and I had to localy bend to get it to fit all went ok. What to do now during virus lock down.

David

Thread: Just arrived (knew of the Mag but not the forum - oops)
05/06/2020 22:21:04

Welcome to the forum. The surface grinder sounds pretty good. Can you program a profile to grind as I always thought that would be great.

David.

Thread: New to area and this forum
04/06/2020 17:58:31

Hi welcome to the forum. I am sure that you can contribute much to the forum on CNC and programing and maybe get some information on projects back in return.

David

Thread: Silver soldering boiler
03/06/2020 20:01:14
 
 
I couldn't wait to try out boiler evan though I was still waiting for the brass plate for top cover.
David
 
https://youtu.be/WqDWz3G2VSY

Edited By David George 1 on 03/06/2020 20:03:54

Edited By David George 1 on 03/06/2020 20:05:17

Thread: Merryweather Steam Fire King self propelled
03/06/2020 13:35:09

Absolutely magic. It shows what a well made scale model can do.

David

Thread: Silver soldering boiler
02/06/2020 19:39:40

Decided to pressure test the boiler. As I didn't have a pressure pump I had to make something and with a piece of 1 1/2 mild steel drilled and reamed a 1/2 bore and cut a 3mm o ring groove to make a seal for a dowell for a plunger. Then I drilled a cross hole 4mm though and tapped them 8mm about 10mm deep. I then made two non return valves from a piece of brass two 5mm balls and a couple of springs one suck and seal, one pressure and seal, just make sure the spring is on the right side. I Soldered a couple of pipes into the non return valves one with a connection to boiler and a suction pipe to pick up water.

David George 20200602_165644.jpg

 

When I conected the pump to the boiler which I had pre filled with water the pump worked great and found a couple of leaks one on the level plug which needed a new washer as the copper one I made didn't seal but a bit of PTFE fixed that for now and the seal on the fitting which holds the pressure gauge had a slight leak at pressure a bit of solid locktited thread seal fixed that.

20200602_165635.jpg

The boiler was ok in itself and holds pressure up to 60 PSI that is as far as the gauge goes. I replaced the grub screw with the safety valve and tested it and it released at about 20 PSI I hope that is enough to run the little wobbler.

David

 

Edited By David George 1 on 02/06/2020 19:42:20

Edited By David George 1 on 02/06/2020 19:43:23

Thread: WM16 help reqd
01/06/2020 22:36:06

Hi if you remove the screws from the end plates on the end of the bed you can slide the bed so far along till you can see the nut be carfuly how far you push the bed and if you need to push it over three quarters make sure it is supported with some wood or other packing. Let us know what you find please. If you have a scale fitted be careful that you don't damage it it may need removing first.

David

Thread: Help needed for screws - Fishing Reel
01/06/2020 11:33:41

Thanks for showing results nice job. So many things are started on here and you never see the end job.

David

Thread: Optical Chucks
30/05/2020 23:04:25

When I worked we used a 3R centering microscope it fitted into a collet or chuck.

3r-4.321.jpg

David

Thread: Silver soldering boiler
29/05/2020 17:16:24

I made a jig pattern to bend and hold the heat shield brass plate. I made it in wood so I can clamp the brass plate, when it gets here, and bend it round and drill and flange for brackets.

20200528_161848-1.jpg

20200529_101118.jpg

20200529_101137.jpg

I drew the radius on the end and used a ball nosed cutter to shape the curve small step by small step then rip off small cusps with sand paper. The groove in the centre is to clear the centre bushes and the brass will be bent down to fit the boiler. It did make a bit of a mess which took about an hour to clean up.

David

Thread: Thread cutting - Apron does not engage with the lead screw
28/05/2020 07:03:12

Hi lathe-argic welcome to the forum. Where are you based it helps as perhaps someone near could give a hand or a local to you supplier can supply materials etc. Even with the virus problem it is possible to do a video connect to see what the problems are. What are you interested in making.

David

Thread: Silver soldering boiler
28/05/2020 06:46:31

Hi Geoff. I have ordered the burner from Forest classics and the safety valve as I thought it would save time but it hasn't come yet.

David

26/05/2020 22:59:25

Made a bit of progress on boiler and made a small drain cock for condensate in chimney, made chimney and started mounting boiler and engin.

20200526_135352.jpg

20200526_142944.jpg

20200526_165009.jpg

20200526_165022.jpg

David

 

 

 

 

 

Edited By David George 1 on 26/05/2020 23:01:24

Edited By David George 1 on 26/05/2020 23:02:18

Thread: [Project 4] Sine plate
24/05/2020 22:51:17

we had a large sine table at work about 3ft by 4ft and the top plate was 3 inch thick. we made standard size bars to go under the plate to suit all the jobs we did from 5 deg to 45 deg. It was made of ground plate P20 I think, and was covered by a pattern of tapped holes to clamp jobs on for milling. You had to use a jib crane to lift the top plate to use it but it did loads of jobs for tool making moulds etc.

David

Thread: Silver soldering boiler
22/05/2020 16:52:58

Made the boiler end support plates. I decided to make them from stainless steel perhaps could have been a little thinner material, 1.2mm, but I managed them in the end although I had to put a groove down the fold line to get a nice bend.

20200521_162609.jpg

Rotary mill end top radius.

20200522_091211.jpg

Bore hole for boiler.

20200522_161745.jpg

Bent ready to try.

20200522_161901.jpg

These are finnished now.

David

Thread: [Project 3] Dickson T1 Tool Holder
22/05/2020 13:46:15

This is a drawing of a standard toolpost using a screw with a plain shank to check sizes from to make sure that the clamp mechanism works the same on all replacement pieces.

20191208_192606_003.jpg

David

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