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Member postings for Spurry

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

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Thread: American threads
21/11/2011 19:22:11
Jason
The new colours are very tasteful.
Thanks for the file though.
Pete
21/11/2011 14:30:04
Posted by JasonB on 20/11/2011 17:36:03:
Have a look in my albums, I posted the table that I made up when the same question came up a while ago.
 
Jason.
It's a very nice chart, but as you seem to have posted it as a JPG, when saved by us poorer members with none-colour printers, the numbers are almost unreadable.
 
Pete
Thread: Help with a 'beehive' spring.
16/10/2011 15:42:17
Thanks to Jon & Andy for info.
 
Pete
15/10/2011 23:13:23
Thanks John
 
I will give them a call on Monday....and look for the book.
 
I did manage to get one quote from another company. £74 for 1 off. Reducing to £6.80 each for 50off. Added to part of tooling cost of £53. No doubt VAT would be added too.
 
Hence my reason for looking for alternatives.
 
Pete
15/10/2011 16:53:34
Wondering if anyone can assist with a difficult (for me) project.
Some springs are required made from stainless half hard music wire 0.032" (which seems to equate to 20 or 21 SWG). The height of the spring is 13mm, max diameter is 20mm. They should be heat treated and tempered too.
A supplier of the material is eluding me, as I need about 6 springs total.
Does anyone have any info as to the method of making them, any useful books, or any supplier who could make them for a reasonable sum.
Pictures below.
TIA, Pete




Thread: whats this tool called?
06/10/2011 13:55:40
In common with others, I have always known the pliers by the 'rude name'.
 
The main advantage is that the sleeves are rubber and flexible as opposed to heastshrink which is not.
 
I get my sleeves from A0 to A3 size (not the same as paper sizes!!) from RS Part no A0 170-7213 ect. I find the most useful are A1, 170-7229.
 
The polite name is Expandable Cable Sleeve Tool. RS No is 548-259
 
Pete
Thread: Benches
08/09/2011 23:51:10
Just put your steel sheet on top of the ply on top of the sleepers.
 
Pete
Thread: Old Oxygen Bottles Use
23/08/2011 12:31:46
In the UK, this might be a useful alternative to BOC. ALBee cylinders from Air Liquide. Hope the link works and does not jam up the works.
Pete
 
Hers's another link:

Edited By Spurry on 23/08/2011 12:32:58

Thread: Linked drive belts from RDG
21/07/2011 23:14:37
That belt sounds very much like the belts that were fitted to my Harrison M250 when it left the factory.
Pete
Thread: Proxxon machine tools
18/07/2011 12:10:01
I have a couple of the older model of FET table saw. On the new model, one feature that seems to have improved is the micro-adjustment feature, as mine have none. I would recommend carbide blades as the resulting finish requires very little sanding.
Pete
Thread: I need a mill ? Manual or CNC??
09/07/2011 23:54:28
Edmund
 
It must have been a very impressive demo...
 
Pete
01/07/2011 19:18:12
Posted by EtheAv8r on 01/07/2011 14:11:14:
Pete
 
What CNC router do you have?...
 
It's a Pacer Compact 1502. Pacer was an outfit in Nottingham, but they got taken over by AXYZ. It seems the smaller Pacer machines have now been dropped from the line-up, so you can keep your 24K in your pocket.
 
As an aside, AXYZ was one of the companies who could not make a decent job of cutting out my wing rib.
 
Pete
01/07/2011 10:15:50
Edmund.
 
I found myself in a similar position as you in 1998, except that I already had a manual lathe and mill.
 
In exploring the cnc route I travelled all round the UK with my wing rib *.DXF file and a 36" piece of balsa and asked various companies to cut a rib from my sheet using their machinery. As a result I was able to choose a suitable machine.
 
A mill-style machine could cut plywood and carbon. I would suggest though, that the results would in no way compare to my router which can run at 24.000 rpm. Large sheets of ply, grp, and carbon are can be perplexing when trying to mount to the mill-style machine. My machine is limited on width to about 910mm. It does not matter if material is longer, but it wil only machine 1510mm on the X axis.
 
The router has mucnched it's way through dozens of 8x4 18mm mdf sheets. The 8x4's are precut at the woodyard or B&Q to 910 x 1220 (2). These can be picked up easily and placed on the vacuum bed, Just try that on a mill......So it all depends on what you might want to end up making.
 
If you ask Arc to machine you a piece of ply and carbon at the demo, I would be quite happy to cut tthe same shape on my router for you to compare.
 
One of the things most firms had difficulty with was positioing the part-to-be-cut on a scrap of material. This happens a lot when cutting bits and bobs from carbon. I can usually put a part within 0.5mm of where I wanted it, with very little effort in the time stakes.
 
Pete
30/06/2011 23:58:10
Edmund
 
The machine (s) you purchase will depend on your aeromodelling requisites. If they are more towards Fixed Wing, then you would not beat a cnc router, especially for cutting ply, carbon sheet, grp sheet, and hardest of all - balsa.
 
If you want to make helicopter parts, primarily out of aluminium, then a cnc mill would be preferable.
 
In the last few days, I have made, on the cnc router, some carbon sheet motor mounts for an electric aircraft . It would have been almost impossible to machine the shape by manual means. For the same aircraft I am now making a complete prop driver assembly on the manual lathe. I guess it would take a fraction of the time on a cnc lathe...but that is on the wish list..
 
If the items you need are composed of straight lines, then manual lathe or mill is fine, but once you start with curves and arcs, cnc is the only way to go...but the learning curve (oh the irony ) is very steep.
 
Pete
Thread: New I/C diesel project - ETA15d-x2
29/06/2011 00:14:35
Hi Ramon
 
A wonderful project. I've really enjoyed all the posts and explanations. Thanks.
 
I have to make a prop driver, so will try your little dodge with the knurling tool at 90°.
 
Keep up the good work
 
Pete
Thread: Oil or Grease?
27/06/2011 14:39:15
Pratt Burnerd, who have been known to make the odd chuck or two, do put their name on some grease specifically for the purpose.
 
Whether this grease is really special or just ordinary stuff in a posh tube, I have no idea.
 
I got some from Rotagrip to try.
 
Pete
Thread: Turbocad 16
26/06/2011 10:49:42
I have used Turbocad since version 2, and would not be without it. I can draw anything I need for my cnc 2D work, saving the files as DXF's for machining.
 
Autocad was tried and found to be dreadful, so quickly reverted to Tcad. The IMSI (Turbocad) forum is very helpful and help is only a mouse-click away.
 
Pete
Thread: HSS Tool Blank Supplier
10/05/2011 13:43:42
GLR are showing them at £2.95
HSS TOOLSTEEL 5% COBALT HS182-1/4" square x 4" long
 
Pete
Thread: "An Accurate CNC 4th Axis"...?
29/04/2011 23:53:10
Thanks for the replies gents. Much appreciated.
 
Pete
29/04/2011 14:46:47
Les
 
My query relates to the use of Arc's 6" geared rotary table. One of the jobs was to round the corners of some MS 1/2" thick plate to a radius of 8mm. From memory the plates were 2" x 2 1/2". Cutting full depth, I found the maximum infeed per pass to be about 0.1 mm or less.
 
Next up was some 3/16" x 3/4" MS bar with a radius of 8.50mm on each corner. I was just curious as to what experienced users of the Divisionmaster/Arc rotary table had found to be a suitable depth of in-feed.
 
So in both cases cutting was taking place very near to the centre of the RT, as the radii indicate.
 
Pete
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