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Member postings for David Davies 8

Here is a list of all the postings David Davies 8 has made in our forums. Click on a thread name to jump to the thread.

Thread: Hoover Motor wiring
22/04/2022 23:16:50


you have four wires. With a circuit tester (Fluke, AVO etc) find two wires that make a circuit. The other two wires should also make a separate circuit.

Connect the two circuits in parallel and apply live and neutral to the terminals. If the direction of rotation is wrong reverse one pair.

If in doubt take further advice before doing the above.

Also, as stated above ensure that the body of the motor is robustly earthed.

I have done this with my 1/3 HP Hoover motor which is not fitted with a capacitor.



Thread: Myford Lever Action Tailstock Design and Build
19/04/2022 22:41:02

Hi Hopper

the device does indeed look as if it has always been on the lathe and the ball handled lever finishes it all off perfectly.

BTW Prof Chaddock describes making the ball handled levers for the Quorn in his book using a form tool to produce the balls. Brave man!

Thanks for a great read.



Thread: Imperial v Metric Measures
09/04/2022 10:25:19

Centimetres belong with dressmakers and schoolteachers. Engineers use metres and millimetres. Similarly radius is a concept used by mathematics teachers and turners. Engineers use diameter, —— Discuss.

Dave……tongue in cheek!

Thread: Myford Lever Action Tailstock Design and Build
09/04/2022 07:41:41

Hi Hopper,

The Snortster looks very nice! Were the Americans confused because of the waste of a good Featherbed or the waste of a lump of Milwaukee iron? The rear wheel looks from th angle of the photo to have a T140V conical hub is that so? I bet it is great to ride with loads of low down torque.

l know of Dresda but I didn’t realise that they made a raised Featherbed for Harley motors. There is also a firm in Aberystwyth that makes Featherbeds like that, they call the end result a ‘Norley’.
Thanks for posting the photos.

The ball handle for the L/O tail stock looks excellent. I have dabbled with ball turning, I went down the tool post mounted boring head route using the ‘up and over method’.



07/04/2022 20:07:01

Hi Hopper

It's coming together very well, it's surprising what lurks inside spare blocks of metal! What's next? A rack operated tailstock?

Very nice to see the Narley and the details of its construction particularly the A10 primary chaincase and the Norton box. I'd assumed that the WLA was of unit construction. Also I assume that the Atlas frame is a slimline type, I found on the wideline Triton I rode that it was awkward to comfortably put both feet on the ground and I'm 5' 10''.

When you have time it would be nice to see some shots of the Snortster as well.



06/04/2022 22:43:52

The above should read:-

I seem to remember a photo of Harley engine in a Featherbed frame in one of your posts.


06/04/2022 17:43:49

Hi Hopper

Your L/O tailstock conversion looks excellent!

I'm waiting for my L/O tailstock conversion castings to arrive, your posts have been invaluable in helping me plan the machining operations

A bit off topic.

It's nice to see the Atlas in the background. I seem to remember a photo of Harley engine in a Featherbed frame in one of your photos. Is this the best of both worlds regarding vibration and handling or is it worse?



Thread: hi from Belfast ...
27/02/2022 21:32:28

Hi Gary

I believe the plate mounted to the spindle on the vertical slide is for mounting a gear train to enable dividing. The fact that there is a plunger or detente fixed to the plate confirms this IMHO.

In fact, after looking at Lawrence Sparey's book "The Amateur's Lathe", pages 178 & 9 figures 195 & 6 the very thing is shown as a photo and as an engineering drawing.

The book is available S/H on a well known auction site for under a tenner. Dad bought my copy for 21 shillings in 1970!

The book and the dividing head are both useful bits of kit.



Edited By David Davies 8 on 27/02/2022 21:39:51

Thread: ML7 Bull Wheel Dimensions?
06/02/2022 22:21:03

My ML7 bull wheel is 3.315 inches O/D and has a thickness of 0,625 inches. The gear has 65t and from those figures it must be 20DP. I can't help with the PA but logic says that it would be 14.5 degrees.



Thread: Electricity Supply - Fun with Statistics
05/02/2022 21:41:08

Correcting my post above:-

The plant I worked at, Orb, the only maker of Silicon Steel sheet for electrical machines in the UK, closed in 2019. In 2018 we used 90 Giga-Watt-hours of electricity at a cost of £7.7M.

SOD's note above prompted me to check my indices!


05/02/2022 07:27:40

SOD said

  • UK electricity consumption fell by over 30% between 2010 and 2020. (From 79.41Mtonnes oil equivalent to 54.10Mtonnes oil equivalent in 2020).

I'm not surprised. The closure of so much heavy and medium industry is responsible for this.

For example ninety percent of TATA Steel's UK electrical energy consumption is used to make liquid steel, the balance covered hot rolling, cold rolling and further processes.

Teeside steel works closed in 2015 (by then Teeside Cast Products). Its blast furnaces used vast amounts of electricity to drive the fans used to produce the 'blast' to operate the furnace. These motors would be rated in Giga-Watts.

Llanwern Hot strip mill closed in 2016

The plant I worked at, Orb, the only maker of Silicon Steel sheet for electrical machines in the UK, closed in 2019. In 2018 we used 90 Tera-Watt-hours of electricity at a cost of £7.7M.

There must be many other example in other industries which I can't call to mind.



Thread: Myford Steady on a Boxford
24/01/2022 01:39:33

An excellent solution William, you have inspired me to do the same for my Boxford.



Thread: Can you identify this motorcycle?
24/01/2022 01:33:02

As Duncan says it is a BSA C10. The oil tank would be behind the girl's calf and the gearbox would be behind her heel. The carb connects to the barrel not the crankcase so clearly a SV 4 stroke. Fortunately the C10 and the C11 were replaced by the C15, a much better bike IMHO and on one I passed my test in '76.



Thread: Drummond vs Myford change gears
03/01/2022 09:37:09

I believe that the Drummond gears are 14DP whereas the Myford 7 series ones are 20DP.

As Lee stated above you can compound gears of different DP on the same shafts and indeed take advantage of the reduced diameter of higher DP gears if the banjo is of limited size.

The above is shown clearly in Martin Cleeve's book 'Screwcutting in the lathe' on page 44, where he used a 30 DP 127T 'translation' gear for cutting a metric thread on his imperial lathe.



Edited By David Davies 8 on 03/01/2022 09:37:52

Thread: Do you "still" enjoy driving?
31/12/2021 16:22:01

Driving is still a necessity for me with a round trip of 52 miles a day to my place of work. As I travel against the prevailing flow of traffic I have reasonably empty roads and can make good (legal) progress. Yes it is enjoyable most of the time.

One thing that annoys me in the hours of darkness is the increasing numbers of cars that I pass with no rear lights on but lo and behold plenty of light at front. I assume that the drivers are using daytime running lights during night time. Am I right in my assumption?

Have others noticed this and what can/should be done about it?



Thread: GH Thomas S7 topslide improvements
25/10/2021 14:45:33

A very neat job Colin.

I also have carried out GHT's slide gib pinning and locking screw mod to my two Boxford CSBs and my Myford ML7 so I know what you meant when you said:-

- this is the bit where GHT talks obliquely about 'clamping it as best as you can'.



Thread: Extension to Digital Version
16/09/2021 19:31:18

My copy of 308 arrived in Cardiff today.


Thread: Milton Keynes Metals?
21/12/2020 10:29:52

+1 for Macc Models and M-Machine.


Thread: Size question
21/12/2020 09:54:21

Nigel Graham wrote "There is plenty of information, hand-books etc. on building locomotives and rolling-stock, but I do not recall any similar literature on building the track".

Martin Evans wrote a book 'Outdoor Model Railways' in 1970 which contains chapters on track and track laying. The content includes reference to gauge widening on curves, super elevation and transition curves or 'easement spirals'.

There is also much information on rolling stock, passenger cars and signalling.

Copies will surely come up from time to time on the second hand market. I bought mine for £2 as an impecunious 12 year old in in 1970,' hot off the press'.



Thread: Cheap Ultrasonic Cleaners
19/12/2020 07:20:32

Ultrawave ultrasonic cleaners are made in Wales, at Cardiff. They may have something suitable.

I have no connection with this firm.



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