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Member postings for David Standing 1

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

Thread: Consumer units -how do they work?
10/01/2017 01:44:58
Posted by Robin Graham on 09/01/2017 23:33:06:

Extractor now working fine. I really only needed to know if it was an over current or earth leak that was tripping the box. Armed with the info that it was an earth leak, I tracked it down to a live wire which must have been trapped between the entry box and the casing, perhaps when the previous owner had fiddled with it. Squashed, but no bare wire so probably a capacitative leak. Rewire without replacing components seems to have sorted it.

End of thread?


Edited By Robin Graham on 09/01/2017 23:36:04

Well Rob, that's taken all the fun out of it! laugh.

Thread: Varnish or not
09/01/2017 22:29:03
Posted by Dod on 09/01/2017 22:24:28:

But do whatever floats your boat unless it is illegal, immoral or fattening.

I can probably turn a blind eye to all three, perhaps all at once wink 2.

Thread: Electronic mouse trap
08/01/2017 22:49:13
Posted by Neil Wyatt on 08/01/2017 21:28:18:

I've found that the simple humane traps work more reliably than 'little nipper' although I have a large Longworth type trap used for everything from mice to gerbil recapture.

Rats, I used to use an extra-large spring trap or my air rifle, but for various reasons they are mostly absent now (cats help).


I also have a rat issue, Fenn Mk 6 traps and likewise an air rifle are effective!

08/01/2017 21:00:40

Rentokil Advanced mouse trap, and a pea sized ball of peanut butter, works for me, I catch endless mice with this.

Thread: Consumer units -how do they work?
06/01/2017 19:53:44


The mcb's in the CU you linked are screwed to the busbar. You just can't see it, under the busbar cover at the bottom smiley.

06/01/2017 19:37:11
Posted by Ajohnw on 06/01/2017 19:33:54:

The OP said it's a dc motor David. Or universal. There may be capacitor in it but only for suppression.

If starting current is causing his problem the C curve might help.

surpriseIt seems that garage CU's should only have on lighting and one power connection !

Vic If the electrician wont do it you could try pulling it out and fitting one yourself. It very probably will pull out just like wire fuse blocks do. We can change those ourselves - or at least replace the fuse.





As mentioned by Toby, the mcb's will probably be screwed to the CU busbar.


Oh, and another thing to mention (I think Toby might have done earlier) is that there is no standardisation with CU's and mcb's across different manufacturers, so a Wylex C curve mcb probably won't fit the cutouts in a Crabtree CU, and so on.

Edited By David Standing 1 on 06/01/2017 19:40:00

06/01/2017 19:35:27
Posted by Toby on 06/01/2017 19:33:04:
Posted by David Standing 1 on 06/01/2017 19:19:50:

I put a C curve mcb in a spare way in the garage consumer unit myself, and took a direct feed via a switched outlet for the compressor off this.

Voila, no more tripping.

You forgot to mention that you also did a loop impedance test to check the C type will trip correct....

I have been sitting here expecting a comment/question from you wink 2.

06/01/2017 19:19:50
Posted by Vic on 06/01/2017 17:01:40:

I need a C type CB in my box to stop occasional trips but I can't seem to get anyone to fit one. The last two sparkles that have done work for us conveniently forgot to do it.


I asked the OP if he had a capacitor start motor way back in this thread, and if he was running it off a B curve or C curve mcb, but didn't get an answer.

At my previous house I was running a single phase compressor with a 3hp motor and capacitor start, and these are notorious for tripping out B curve mcb's.

I put a C curve mcb in a spare way in the garage consumer unit myself, and took a direct feed via a switched outlet for the compressor off this.

Voila, no more tripping.

Edited By David Standing 1 on 06/01/2017 19:22:36

Edited By David Standing 1 on 06/01/2017 19:23:51

06/01/2017 10:20:04

Does the extractor motor have a capacitor start?

If yes, is it running off a B curve mcb, or a C curve?

Thread: The Beauty of Tools
05/01/2017 15:00:09
Posted by Carl Wilson 4 on 05/01/2017 06:45:48:

That's proper nice that is....we've got some competition...

Fight! Fight! p.

Thread: Quick change tool holders
04/01/2017 22:41:55

Whoops - editing my original post somehow reproduced it totally here in a new post!

Edited By David Standing 1 on 04/01/2017 22:47:03

04/01/2017 22:18:03
Posted by Michael Gilligan on 04/01/2017 10:02:03:
Posted by David Standing 1 on 04/01/2017 09:46:11:

All the toolpost and holder dimensions are in the Rotagrip link I posted two days ago, further up this thread smiley.


... and because it's so useful; here is the 'link' that David posted, as a **LINK**


Thank you Michael, and as you will see from my above post I have now subsequently figured out how to post a link myself wink 2.

04/01/2017 22:16:36

The following will contain some assumptions - I don't like assumptions, as they can be a fancy word for 'guess', but unless someone comes up with some more definitive data, that's the best we will have to work on.

I am not sure if there is an industry standard for the tool posts and holders, certainly I have never seen a drawing showing the taper dimensions for one, which are one of the critical parts of the setup, and one of the biggest single factors I believe in getting different makes of post and toolholder to mate properly.

So, the first assumption, that Dickson probably set the standard, and if another post or holder is to be compatible, it should be machined to a Dickson dimension. Rotagrip sell genuine Dickson, and also Toolmex/Bison. I have a genuine Dickson toolpost for my S7, and Toolmex/Bison holders, which fit perfectly.

Bison toolholders can be identified by the fact that they normally have (for example, for a Myford standard toolpost, S00/T00 fit) '4494 - 48' etched on the front lower face of the toolholder.

There is a further data sheet on the Rotagrip site, and it lists machines and their correct toolposts:


Firstly, the T and S prefixes to toolposts and toolholders are effectively the same - so, an S00 is the same as T00.

I believe T00 M is Myford fit, and T00 B is Boxford fit.

If you have the correct toolpost, that dictates maximum tool setting height, but the really critical measurement, as pointed out by Peter, is the thickness of the base of the toolholder that the tool sits on, since that dictates getting the tip of the tool low enough to be on centre of the material being turned.

In theory the bottom toolholder thickness will be G minus E in the dimensions on the data sheet. For a S00/T00 this would be 17mm less 10mm tool, so a maximum thickness of the toolholder base of 7mm (.275" ), but I think this is suspect.

In an earlier post Peter you said the minimum base thickness of any of your toolholders was .222. For your info, that is exactly what my Bison 4494 - 48 toolholders measure.

In summary, I know Bison holders fit a genuine Dickson toolpost perfectly, because that is what I use.

Lyman seem to be well recommended (noting Robbo's caveats above), but personally apart from those I would only trust Bison to accurately fit a genuine Dickson toolpost, and to be accurately machined.

Or, to put it another way, if you are trying to mate RDG or Chronos or whatever posts to holders you are probably perfectly ok to mate same supplier to same supplier posts and holders, but if you are trying to mate Chinese or Indian toolposts to anything, or Dickson/Lyman/Bison to Chinese/Indian etc, expect potential problems.

I would also say that I mention Dickson and Bison not as a plug for either, only because I know they are cross compatible; and only mention Rotagrip as supplier of both, and the source of the datasheets.


Edited By David Standing 1 on 04/01/2017 22:38:16

Edited By David Standing 1 on 04/01/2017 22:38:44

Edited By David Standing 1 on 04/01/2017 22:45:28

04/01/2017 09:46:11

Nitai and Peter Spink:

All the toolpost and holder dimensions are in the Rotagrip link I posted two days ago, further up this thread smiley.

Thread: Motorcycle General Discussion
03/01/2017 17:14:42

I wonder which nail in the British motorcycle coffin that was! wink 2.

Thread: The Beauty of Tools
03/01/2017 08:05:08

Shouldn't those all be neatly lined up in size order? surprise.

See what you started now! wink 2.

Thread: Anyone recognise this logo from a four jaw chuck?
03/01/2017 07:59:57

Your memory serves you well:

Thread: The Beauty of Tools
02/01/2017 16:44:10

Quiet day? wink 2 laugh.

Thread: Quick change tool holders
02/01/2017 12:09:46

And this link will give you the dimensions of both toolposts and holders.

Thread: Original Myford raiser block queries
01/01/2017 21:43:10
Posted by KWIL on 01/01/2017 19:06:02:

It does not have to for you, the OP has said he has got the hang of it and is going to have a go. fist

Well, Happy New Year to you too surprise.

Have i done something I am unaware of to upset you? sad.

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