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Member postings for Mike Poole

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

Thread: Digital readout dial test indicators
26/09/2013 18:37:53

I also have analogue DTIs and I would agree that they are easier to use for some tasks than digital gauges. I still have an AVO in my drawer but the Fluke has become the tool of choice due to its portability and robustness. The AVO was most unlikely to survive being dropped but the fluke in its rubber case survives most incidents on the shop floor.

Mike

26/09/2013 14:47:10

I have two mitutoyo ones and both displays rotate. I would imagine it is a common feature as reading upside down would be prone to error.

mike

Thread: between the shoulder measurements for Myford Super 7 feet bolt holes
25/09/2013 21:22:53

I have just checked a manual and the standard bed was 22 1/4 inches, all other dimensions agree with Norman. For the sake of waiting to drill a couple of holes I think I would measure the lathe when you get it.

Mike

Thread: Minnie boiler stays
08/09/2013 20:03:44

Thanks to the Jasons for their replies, I think I will go for the updated design, As the boiler was completed apart from the firebox stays when I took on the job silver soldering inside the firebox will be fiddly but I know a magician with a welding torch who is willing to do the job.

Mike

06/09/2013 18:08:53

I have taken on the task of finishing a 1" model of Minnie. The boiler has been assembled and silver soldered apart from the firebox stays. Reading the Len Mason book I get the impression that the stays are soft soldered, but I am sure that I have read that boiler inspectors now look for these to be silver soldered. Can anyone guide me as to current practice, as if I soft solder them, silver soldering will no longer be an option.

Mike

Thread: Why won't this work...or will it?
14/08/2013 18:10:37

Many years ago in a Bike magazine article a guy built a special that he called Red Shift, if only bikes were that fast.

Mike

Edited By Michael Poole on 14/08/2013 18:11:02

Thread: warco vmc motor wire connections
14/08/2013 07:22:40

Hi Kevin,

I have the same mill with that motor type. I have 2 red wires labeled Z1 and Z2 and 2 black wires labeled U1 and U2. Z2 goes on the top left U2 on top middle U1 bottom left and Z1 bottom middle.

Mike

Thread: New subscriptions, am I thick or what?
06/08/2013 17:41:55

The most expensive print and digital subscription for MEW is £61.95 ME is £91.95

Mike
Thread: Flat 8
28/07/2013 20:51:35

TZ750V8.jpgHowabout a V8 1500cc TZ750

28/07/2013 20:24:46

Howabout a 7 cylinder Kawasaki?

**LINK**

Thread: CLARKSON AUTOLOCK CHUCKS
01/07/2013 19:04:28

I was taught the Clarkson recommended method. It now becomes clear how the small 1/4" 6mm cutters get their centre ends broken, following the Clarkson procedure this has never happened to me.

Mike

Thread: Aircraft General Discussion
26/06/2013 14:43:34

RAF merlins constantly as we are under the approach path for Benson. An occasional treat is the Martin Baker Meteor for ejector seat testing but I have not seen it for a while.

Mike

Thread: Another motor wiring question
25/06/2013 02:57:49

So is Ians motor being overstressed by a 240V full wave rectified supply? I think it is a bit and to add smoothing will make it worse and also watch out for the current pulse to charge any smoothing caps damaging the rectfiers.

Mike

25/06/2013 01:25:47

A full wave rectified 240Vrms sine wave will vary from 0V to a peak of 340V if I store energy in a capacitor and maintain a voltage with a bit of ripple that does not drop to 0V I will have a waveform that is no longer a rectified sine wave but a slightly rough DC at a voltage above 240V DC and Below 340V DC

Mike

25/06/2013 00:11:25

It is stored in the capacitors and supplied to the load when the supply voltage drops below the charge voltage of the caps.

Mike

24/06/2013 23:28:42

The motor is rated at 200/220V DC. 240V rms provides the equivalent heating effect of 240V DC. To apply smoothing will raise that DC voltage. 340V is the peak voltage so depending how much capacitance is used will decide the ripple on the supply, some big caps could push the DC towards 300V

Mike

Thread: Aircraft General Discussion
24/06/2013 21:56:54

It would seem the RAF would  shoot an airliner down

**LINK**

Mike

Edited By Michael Poole on 24/06/2013 21:57:13

Thread: Taps and dies
24/06/2013 15:18:42

The great thing about HSS was that it would hold its temper at red heat, not a situation a tap is likely to encounter. Carbon steel has alot of fans for taking a keener edge than HSS. Taps made from HSS are usually ground after hardening which makes a high quality tap. I do not think HSS is any tougher than properly hardened and tempered carbon steel. What do the metalurgists think?

Mike

Thread: Chesterman 369 height gauge
24/06/2013 14:48:11

I think it is for measuring the depth of holes

mike

Thread: Taps and dies
23/06/2013 20:03:01

Carbon steel taps can be softened if you have the misfortune to break one in steel,EDM is probably the only solution with HSS

Mike

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