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Member postings for Brian Wood

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

Thread: Myford extension for spindle.
31/05/2021 18:40:21

Oh, sorry, the extension is to the spindle nose. I assumed, without checking, that it would be as I described.

I'm sorry, I can't help with a use for an extension this way round.

Regards

Brian

31/05/2021 18:36:40

Old Mart,

To guide swarf out of the bore and through the hole in the change wheel door, rather than have it falling into the change wheels inside the cover.

Regards

Brian

Thread: Bantam metric leads crew & half nut
30/05/2021 20:35:07

Hello Dan,

I am surprised that no-one else has mentioned it before now , but surely there are change wheel arrangements that will give you metric threading using an imperial leadscrew. Are there no guidance set ups in a plate fastened to the change wheel cover or elsewhere on the lathe? It would save you a lot of money and the approximations are usually remarkably close.

Brian

Thread: Screwcutting on the Bantam
28/05/2021 09:45:07

Hello William,

I think you may find the tooth form will be DP and perhaps 14.5 degree pressure angle. I am going by the vintage here but I may be wrong on the pressure angle, it could be 20 degrees making for stronger gear teeth by virtue of the slightly broader tooth base.

Owners will be able to confirm my thoughts

Brian

Thread: 935 bronze
24/05/2021 11:12:49

M-Machine supply small pieces of stock as well by mail order

www.m-machine-metals.co.uk

Brian

Thread: New use for a slide rule
23/05/2021 10:48:26

I remember the cylindrical slide rules as well and used them in the process control lab I was working in at the time. They gave better accuracy by virtue of the longer scale length that was available compared to the linear models

Brian

Thread: Distilled water for anodising
21/05/2021 09:18:30

Be-friend to your window washing people, or bribe them with tea, the ones that use long poles and lances with a pumped supply of water in the hosing.

They use demineralised water by the gallon so that the windows dry without leaving streaks. We have been using ours as a supply for years

Brian

Thread: Springy sheet brass?
15/05/2021 17:41:10

Be careful when machining beryllium copper, Beryllium is poisonous when ingested.

Brian

Thread: Myford A1
10/05/2021 14:57:06

My Dad's ML4 which he bought in 1945 had the serial number D 2382 which may help track down the model number and year of manufacture for Leslie's find

Regards Brian

Thread: Magnetic swarf
03/05/2021 17:32:59

Cast iron does not hold residual magnetism in the same way as steel does which may explain why it is not noted as a problem with DTI mounts on such surfaces.

Regards Brian

Thread: filling holes in bronze castings
02/05/2021 18:19:16

Hello Gary,

Brazing if you have the means would be a good option as that will give you equivalent strength in the filled holes if you need to rework them with threads

Regards

Brian

Thread: Dore-Westbury mills
02/05/2021 10:19:53

DMB,

When I built my Mk II, I fitted a 1/2 HP motor to it without thinking about the power requirement. The motor itself was a farm sale rescue that had a broken foot mounting but was otherwise a first rate Brook Crompton with ball bearings rather than oilite bushes. Because of the damage the motor was unused and cost me £2

From the experience I have had in nearly 30 years of use, I would consider anything less powerful would rather hold the machine back in its capabilities

Regards Brian.

Edited By Brian Wood on 02/05/2021 10:20:34

Thread: Help please!
26/04/2021 12:49:59

Hello Diane,

You asked for some idea of value. Much depends on what accessories it has to go with it, other chucks, faceplate, stead(y)s and the set of change wheels for example, the list is not exclusive. These Myford lathes hold their value and one in cared for family ownership, rather than end of life eBay disposal, could fetch up to £500. A private sale will always do better for you than via a dealer offer.

You might find someone on the forum who would be willing to visit and give you a better idea; some idea of your town/city location will I'm sure get a volunteer. I live in North Yorkshire outside Thirsk if that gives you some idea.

Good luck Brian

Thread: What to do when you lose something
25/04/2021 10:10:52

The late John Stevenson once confessed to owning seven angle grinders, having 'lost' the previous six!

Like everyone else, I can put a tool down, pick up something else and then lose them both.

Brian

Thread: small lathe job needed
19/04/2021 18:09:50

Hello James,

With it held in the drill chuck, try tapping it straight with a soft famed hammer, or a short length of timber and hammer to chase the run out to something like it should be.

I don't think it will be made in hardened materials and that way you can fix it yourself

Good luck

Brian

Thread: BSW
11/04/2021 18:40:17

Hello Brian G,

Your analysis agrees with mine, point for point using a 2 mm pitch leadscrew, the results when trying a 12 TPI leadscrew were a whole lot worse and I hope others with recent purchases who will send them back. These results are quite frankly atrocious which ever way you cut the cake and I suspect the 56 wheel is a big mistake..

The Grizzly lookalike GO 768 has a 40T spindle wheel and results that are acceptable when matched to a 12 TPI leadscrew, which threw me to start with as in my experience it is very unusual

It is all very unfair on a potential purchaser who is in no position to do other than take the values on trust. There are at least three other Chinese factories making these under different names than a CD 210V, all are fitted with the same gearing plate.

Caveat emptor I think.

Regards Brian

11/04/2021 15:40:55

Hello Russell and Brian G,

I don't think that will solve the dilemma for Brian G or my understanding of this lathe for that matter until we know what the correct leadscrew pitch is.

I did ask Julian to do some tests for me to establish it properly so that I could send revised tables to him but having bought his BSW die that now sounds like a dead end..

If Brian G can establish the truth, one way or another, I have a complete and extended set for both languages ready to go based on a 2mm pitch leadscrew. It is not a lot of added effort to rework those based on one of 12 TPI. Send me a PM if that would help you.

Regards Brian

11/04/2021 10:52:37

Hello again Howard,

I now have every reason to suspect this new crop of lathes from China are fitted with 12 tpi leadscrews and not a metric thread of 2mm pitch as Julian said he had measured.. The very similar lathe on the Grizzly website is equipped that way but the threading tables are very different of course with a 40 T spindle gear. Using a 12 tpi leadscrew in the calculations does give realistic results for that machine.

However, trying this new approach on the CD 210V gearings as listed gives a completely incorrect set of results for the whole range of pitches, both metric and imperial so I am now withdrawing from this unrewarding pursuit to leave it to others with perhaps more stamina to figure out the wily Chinese mind.

I think MC Black is right to suggest cutting the thread with a die instead!!

Regards

Brian

10/04/2021 17:24:01

Howard,

I was making a lot of assumptions with my calculation. I now have Julian's photo of the headstock [with a fixed 56 T gear on the lathe spindle] and showing the threading tables; he tells me his leadscrew pitch is 2mm

I have had to recalculate accordingly, the value one gets from the machine plate is 9.84 TPI

I am hoping Gerard O'Toole will get in touch, he has the same lathe and my new tables might be of interest to him as well

Regards

Brian

10/04/2021 08:51:44

Gerard O'Toole,

There is a personal message waiting for you, it might be of interest.

Regards

Brian

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