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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: Injector help
02/07/2019 20:22:04

Bump

David

Thread: Thread Bare
01/07/2019 21:41:09

Hi where in the country do you reside I have some helicoil taps if you think it would help. You have to have enough metal round the thread to cut the oversized thread and when done it us just as strong and in alloy stronger.

David

Thread: Bookpress 5tpi Square thread help please!
27/06/2019 23:10:47

Nice job in the end and nice to see the results as so many don't let us see what happened.

David

Thread: What method do you use to find center height for your lathe bit?
27/06/2019 07:25:47

I use a 6 inch rule and trap it lightly between the tool and a piece of round metal in the chuck and when it is vertical to the bed it is on centre height, quick and easy works all the time.

David

Thread: Learning CAD with Alibre Atom3D
25/06/2019 17:42:43

I tried to run the fix and it failed to work but I found why.

The .bat file which you download puts a remove.exe file in your downloads and I found that windows defender didn't like it. I looked in the downloads and clicked the exe file and a red tab popped up saying it was blocked by windows defender and it could harm your computer so I clicked a label called details and there was an option to run anyway and after it has run I could run Alibre as to info in the article and now have put in my licence no and back working.

David

 

Edited By David George 1 on 25/06/2019 17:44:43

25/06/2019 10:01:30

Help I used the trial software on my laptop and after a while decided to buy the licence and received licence No. I installed the software on my base unit PC windows 7 pro, no problem. Yesterday SWMBO was on PC and I decided to transfer licence to laptop. I was allowed on PC to relieve licence No problem but when I go to laptop and start Alibre all I get is the licence has expired and the only button is exit. I thought I would uninstall program and reinstall but after doing all that I get the same licence expired and exit how do I get to install licence No. HELP ! I have sent an email to David but no answer yet.

David

Edited By David George 1 on 25/06/2019 10:02:36

Thread: bridgeport power feed
24/06/2019 14:02:07

Hi Gary the power feed units are available to go straight on to a Bridgeport mill with little or no modification. Ask the suplier to make sure you get the one to suit your mill.

David

Thread: Solid carbide end mills
24/06/2019 09:45:41

I use them all the time especially on hard steel and castings which may have hard spots etc just run them at a slight faster speed it helps.

David

Thread: Is it bad practice to lock my Myford lathe using the slow speed lever
24/06/2019 09:41:50

The back plates on my chuck have a keyway for a C spanner and I only have to give a sharp blow with the palm of my hand to unscrew the chuck. You dont have to lock the spindle just inertia is enough and if it dosnt unscrew after a heavy job i jusg use a small size A copper mallet.

20171024_090744.jpg

20171024_090719.jpg

David

Thread: small belts
23/06/2019 19:21:12

Have you tried Beltingonline.com I bought a 6mm wide belt for my small lathe from them it cost a few pounds and just tried their web site and it accepted 3mm.

David

Thread: Mill spindle speed
23/06/2019 09:50:52

Can't see pictures can you use forum picture download format. It's on top of page in black band, forums then website frequently asked questions and then how to Post pictures .

 

https://www.model-engineer.co.uk/forums/postings.asp?th=103028

David

Edited By David George 1 on 23/06/2019 09:52:15

23/06/2019 08:05:44

Personally I would reduce the spindle speed to 3k but it depends on what you are going to cut. Smaller cutters need higher speed but if you want to use a larger cutter, fly cutter or boring head I would think the power ratio is not useful.

David

Thread: Aluminium cylinder blocks
21/06/2019 22:50:45

I have used hard anodising in tooling for plastic injection tooling and on disc breaks on racing motorcycles to reduce weight. You can get it done local to where I live and they also do PTFE coating on hard Anodising. There is no need to grind after treatment but there is a build up and that should be taken into account they will tell you the amount but it would be between 0.002 " and 0.005 ". Mansfield Anodisers Ltd. There may be other anodisers local to you.

David

Thread: Warco Mini Lathe
21/06/2019 22:32:27

Can you put some pictures for us to see problem.

David

Thread: Hello from East Yorkshire
19/06/2019 20:06:21

Hi welcome to the forum I seem to get involved in tooling and machinery and get a little time to make models as well. My wife has just taken up a new hobby of stained glass and I seem to be a specialist in that at the moment but hey no you never know where these things go to. Have a go at anything.

David                 sorry about duplicate entry.

Edited By David George 1 on 19/06/2019 20:07:51

19/06/2019 20:06:20

Hi welcome to the forum I seem to get involved in tooling and machinery and get a little time to make models as well. My wife has just taken up a new hobby of stained glass and I seem to be a specialist in that at the moment but hey no you never know where these things go to. Have a go at anything.

David

Thread: Hi from south Wales.
18/06/2019 22:49:09

Hi Welcome to the forum. Loads of information on here and maybe help other people as well.

David

Thread: Improving runout in a slitting saw
18/06/2019 07:57:34

As part of my apprenticeship I had to learn how to reground cutters and part of this was regrinding slitting saws and you would dress the wheel quite a few times when grinding the actual cutting faces the throat and clearance to make cutting edge. You would put a cut on and go round the whole saw and then put a couple of thou cut on and repeat the cut round again till you got no disernable difference then put a slight tenths cut on and repeat till you were sure it was round, the wear on the grinding wheel at the amount you took of was zero. This was repeated for the cutting edge clearance and so you could be sure if the arbour on the machine was correct it would run true.

David

Thread: Hardening a form tool made from Gauge Plate
14/06/2019 21:18:25

It sounds like the piece wasn't hot enough did you use a hearth to keep the heat enclosed and when you say red hot it should be more orange to be hot enough to get a decent hardening. I have a pile of fire bricks which I enclose the piece to get it hot enough and a nice large blow torch. I also have a gallon tub of oil right next to quench it in. You must vigorously move the piece in the oil to remove the heat quickly. Test with a file and it should just skid off. To temper the piece polish with emery cloth and I sometimes descale in brick cleaner and degrease as well. Heat slowly until a light brown colour is atained and then wait a minute and quench in water. Job done. This is how I harden gauge plate and silver steel I hope it helps.

David

Thread: D R O Read Head Problem
12/06/2019 11:59:31

Hi Howard what is it like do you have a picture of said item I have a redundant scale here and just wondered if it would do.

David

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