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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: Ceramic(?) board
14/03/2017 22:40:26

Syndanyo  is an asbestos free insulation board made from a fiberglass and polymer matrix. It can be machined (with dust extraction) drilled taped and comes in various thickness it is supplied by DME mould tool suppliers. I used it in toolmaking plastic injection tools. It is abrasive to cut and used a diamond saw in a jigsaw to cut  sheet to size and carbide cutter to drill and machine. 

David

Edited By David George 1 on 14/03/2017 22:45:43

Edited By David George 1 on 14/03/2017 22:46:52

Thread: Small tool storage
12/03/2017 19:15:09

I was in the same predicament as I had just retired from toolmaking and had to move my mountain of precious tools to the garage at home and within a few months found traces of rust on some tools and my toolmakers cabinet 45 years old was becoming stiff to open the draws and door. I painted the floor and walls with a industrial floor paint and I now run a dehumidifier two or three days a week and the problem seems to be solved for me as the Drummond lathe in the garage now shows no sign of rust etc.

David

Thread: Free Cutting Steel Plate suppliers
11/03/2017 21:48:37

I can find a few local steel stock holders within a few miles who stock 4mm thick, cut to any size I wish, just look in local directory, or on the Internet. Junction 28 M1 area.

David

Thread: Drilling tiny holes.
05/03/2017 16:29:15

I used to drill thousands of .25 mm dia holes in mould tools to vent air, and used an air drill mounted in a stationary drill chuck, although they were in aluminium blocks. I would try a few test pieces before going live on a job, just to get the feel on how you need to back off and when to lubricate etc.

David

Thread: Printed "Template"
19/02/2017 16:07:42

I have been told that you can use a laser printer onto glossy paper and if you iron the two together the image is transferred to the part. You just need to print the image in reverse if it needs to be. It works on copper printed circuit boards both the track and component sides with different images.

David

Thread: Bench grinder wheels
17/02/2017 21:19:22

Hi Hacksaw

Whatever you do don't use anything to clamp a grinding wheel except a gloved hand. If you have ever seen a wheel explode griping it with mole grips is a shure way to see one. I always grip the wheel with strong leather glove when titening or loosening a wheel sometimes giving the ring spanner a sharp blow with a small malet if it won't undo but don't over titen. And makesure that the paper washers are intact and in place. If a wheel is suspect from misuse destroy it for prevent use by anyone.

David

Thread: Machining EN24T
12/02/2017 21:38:02

Hi Chris In the last few years I became aware of hard spots in some pieces of material especially P20 and EN 24T On investigation I believe that the material in question was from the far east and not from our usual steel maker due to the cost. Sometimes we could grind out the hard spot with a small air grinder or use carbide tooling. Sometimes it was easier to replace the component part and start again.

David

Thread: Newby machine help please
10/02/2017 22:49:58

Hi Marc You can look up Woodhouse Mitchell lathes on Lathes.co.uk web site ( Tony's lathes)

David

10/02/2017 21:55:26

Post the pictures in an album and then anyone can see them if you like.

David

Thread: Grinding a carbon steel die
10/02/2017 20:10:40

Could you remove the first thread in the socket to help with the Clearance?

David

Edited By David George 1 on 10/02/2017 20:11:28

10/02/2017 20:00:32

Hi Paul, but usually I would fit a copper or aluminium washer to the plug as that helps seal as well as getting rid of the thread problem. Just a Thought!

David

Thread: Hello From Nottingham
08/02/2017 23:17:06

Hi Steve from Sutton not far from junction 27, welcome.

David

Thread: Lost wax casting advice needed
07/02/2017 20:53:42

Hi Brian. As I worked for a tool making company specialising in investment ( lost Wax ) casting making wax dies for parts from hip joints to turbine blades for Rolls Royce it is easy to make your own die from aluminium blocks. if you ask the casting company for their die sizes and injection information i.e. Die height sprue location radius anyone could make a pattern die and then you could make as many parts as you like and possibly using inserts use the die to make other parts. We used to have a standard die and just replaced the insert to make different parts maybe they have a standard die so you could make inserts for.

David

Thread: Greetings all!
05/02/2017 08:44:21

Hi welcome to the group. lots of information and help where are you based?

David

Thread: Oxy Acetylene help
04/02/2017 17:45:27

Can anyone give me some guidance with some Oxy Acetylene equipment I have been given. It is a Rothenberger ROXY KIT-140 . I have used sets in the past but with full sized bottles and wandered how good the kit is and practical. It works as it has gas in its bottles but there are some micro nozzles in the box which look like hollow hypodermic needles what are they for.

David

Thread: Spline cutters
04/02/2017 08:05:26

There's a company called C. R. Tools of Sheffield that I bought one from to repair a varispeed mill shaft try them.

David

Thread: Hello, I have no idea what I am doing
03/02/2017 08:46:31

Hi Nick

There are some amazing groups of people around who are available to help and give other people support as I have recently retired and and inherited a lathe. I was amazed to find localy people with workshops in theIr gardens and I have been introduced to a group in Chesterfield with steam engine and track that I never new about evan though I passed it on the way to work daily. On Monday I am going to help someone I met to fit a DRO as I did such things when I worked it keeps me busy in retirement. If you let like minded people no where your locality is I'm sure they will let you know where help is to be had.

David

Edited By David George 1 on 03/02/2017 08:46:57

Thread: Alexander 2CG Tool Grinder Questions
02/02/2017 19:03:34

Hi Martin the Cutter grinder is quite a good thing to have except for the motor in the unusual position. I was using one last year at work quite regularly, till I retired, but with a diamond wheel on mostly, for modifying cutters re sharpening used ones and engraving points. The green painted part is for grinding the sides of end mills or slitting wheels which you can't usually but with that it makes it very useful. You use the adjustable finger to position the cutter radially on each edge as you withdraw the cutter to keep the edge at the correct angle and then just repeat the same on each tooth.

If you are not keeping it I would also be interested! also.

David

Thread: Non-standard use of woodworking table saw
30/01/2017 09:41:18

In the early years of my career in was involved in manufacturing parts for the launch platform for the seacat missile the main cover plates were cut using a large Watkins router and tungsten carbide cutters. This was before CNC milling and we just followed a pre cut template to profile and mill the aluminium parts. You worked out where to stand to avoid the chippings or proped the guard (piece of perspex ) to stop the chippings going down your collar etc. Not much hse in those early days but it cuts the alloy pretty quickly.

David

 

Edited By David George 1 on 30/01/2017 09:42:01

Thread: Oil coolant pumps - which type of pump
29/01/2017 12:22:56

If you were to get a pump with 25 litre a minute at 2 meter head you would have a reasonable pressure to flush down a drilled hole with a small bore nozzle and if you turn off the tap without turning off the pump you would be better with a centrifugal type as there will be no increase in pressure with that type of pump.

David

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