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Member postings for DiogenesII

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

Thread: Thompson Engine from Scratch
21/01/2021 19:10:37

Great to see & hear it, it's an interesting one to have seen built, thanks.

Thread: Myford spindle rectification or replacement
21/01/2021 18:54:51

Just been watching the last two videos ('collet chuck' & 'MT adaptor'  - is the bruising that you mentioned in your first post that which is visible on the flank of the first full-turn back from the open end? ..there are some very experienced & pragmatic machinists responding to this thread, maybe if anyone else would care to take a look and comment - I recognise that it's hard to tell without having the thing in one's own hands, but if you can still see or feel even a slight irregularity, you could perhaps try another careful clean-up with a (shaped, if necessary) slip and see whether you can get the collet chuck a little closer - as noted above, with the stick-out that you have, it can only be some very few microns at the nose..

Maybe a little permanent marker applied to the threads in that area and trying the chuck on & off a couple of times might tell you more?

Edited By DiogenesII on 21/01/2021 18:55:19

Thread: Marine Engine Flywheel Fixing
19/01/2021 14:31:43

..and just to complicate matters further, here is another description containing the bolting arrangements to be employed..

img_1606.jpg

img_1608.jpg

..from Henry Spooner's 'Machine Design Construction and Drawing' (Longman's, Green & Co., 1908) included because of it's direct relevance to the specific context of the discussion.

..By the terms 'Two Crank' & 'Three Crank' I surmise he means two- and three-throws - i.e. twins or triples..

Edited By DiogenesII on 19/01/2021 14:36:43

Thread: piston rings for bronze cylinder
18/01/2021 19:43:05
Posted by Graham Meek on 18/01/2021 12:16:17:

Re, Viton O-Rings,

I have a vague recollection of reading somewhere. That Viton after being exposed to steam can have an adverse effect on Human Skin. I think it was something to do with "burns", and not those caused from handling hot objects.

If anyone knows more about this issue then I for one would like to know more about it. As I have fitted Viton O-rings to my Steam Wagon.

Regards

Gray,

It's quite safe - this explains everything

HSE - Fluoroelastomers in Motor Vehicles

Thread: Myford ml7 about to buy
12/01/2021 13:53:53

Try this;

How to.. ..Pictures

Thread: Anyone have a Clarke CL250MH (Sieg M1)
10/01/2021 18:09:27

I've bought smaller stuff from them, was fine..

Whilst you're browsing Ebay, might be worth noting that Honda and BMW (& probably others) use 45mm fork-stanchions in their bikes.. ..much stiffer & maybe less 'ringy'.. ..you'd want the vendor to guarantee or have them back if they're not straight..

Edited By DiogenesII on 10/01/2021 18:09:52

Thread: 130mm independent 4 jaw chuck, does it exist?
05/01/2021 17:20:26

Hmm. ..does anything prevent it swinging a 150 (or 160) mm four jaw?

Thread: Odd thread
05/01/2021 09:18:59

face 24 ..quite so..face 24

05/01/2021 07:09:51

doesn't 5/16 ME thread come as 40tpi..?

Tracy Tools 5/16 x40 ME

Edited By DiogenesII on 05/01/2021 07:13:00

Thread: need a bullgear for myford ml4 lathe
03/01/2021 11:06:54
Posted by Dave Halford on 01/01/2021 20:58:34:

How bad is it? One or two teeth can be brazed up

It's possible to cut all the teeth off if you can find any matching gear (DP # of teeth and pressure angle), which needs the centre cutting out leaving you with a gear ring which you then fix to the bull gear centre.

Myford used changewheels for the backgear cluster on these, so form will be the same - and the ML4 changewheels I have mesh with those of the 7 series, so 20DP 14.5PA? ..IIRC..

What was the tooth-count of the bullgear?

Thread: Leaky nose?
24/12/2020 10:07:34

Felt Strip ? - more suitable for low shaft pressure applications in a fairly 'passive' environment?

..it's still available from the likes of SKF.. ..I know where I might look, in the 'Business Office & Industrial' section..

Thread: Stent Tool Grinder
22/12/2020 16:29:15

ER Tap Collets...

Weston Tooling ER Tapping Collets

Also available elsewhere I'm sure..

..I guess you'd only need to buy em' once..

Edited By DiogenesII on 22/12/2020 16:33:19

Thread: Thompson Engine from Scratch
21/12/2020 20:31:48

I look forward to that. ..You plan to leave the crank 'open' rather than close it in?

Thread: M-DRO on SX2.7
21/12/2020 10:16:46

If it's of any help at all, fitting the Y scale to a Warco might have presented similar problems - draught on the base casting, lack of parallelism of casting sides to table axis, no machined reference surfaces etc..

Having spent a couple of fruitless hours offering things up and taking them down again, I finally used assorted M4 grub scews to make the brackets adjustable (see sketch below) - it allows one to set everything up perpendicular / parallel with straightedge, square and clock, and once the foundations are 'square' and solid then hanging the scale and head off them in the correct relationship can be done using standard 90 angles and flat stock..

img_1567.jpg

Thread: new ML7 headstock bearings
20/12/2020 18:07:02

Another who thinks that it's an interesting project, but has serious misgivings as to whether it's viable - as user observations/perceptions rather than expert opinion;

In general, the bearings seem to outlast the usefulness of beds, saddles, and tailstocks - the cost of refurbishing these is commonly commented on & baulked at by all but the most determined restorer.

I think the most problematic difficulty is that you will be sending out an expensive 'raw material' that relies on the customer's ability to hand fit and scrape them to the level of a time-served craftsman for success - (It wouldn't surprise me at all to find that this WAS the reason for their original discontinuation) - one can imagine who will be to blame when it doesn't go well..

It might be a more realistic business proposition to practice the whole process until you have the perfect job down pat, and then offer the complete bearing refurbishment service from start to finish yourself.. ..people did (and do) make money from such things as magneto refurbishment & instrument repair on this basis..

Thread: Milton Keynes Metals?
20/12/2020 11:00:30

I can't keep my counsel any longer - this being the fourth time within a week that I've seen that online supplier mentioned.. the one who, as an example, charges this;

Brass Round Bar 7mm

for this;

7mm Dia Brass Round

..other independent suppliers are widespread and just as competitive..

My eyes were opened to this web-supplier when last week I bought 210metres of small dia. black mild steel round from my local family-run stockholder - price £270, dropped in my yard in 3m lengths, with a VAT invoice & receipt.

Just out of interest, I checked whether it would have been cheaper to buy online - the M4U business was the first up - if I'd have bought from them in whole-bar lengths, the price would have been £403+ delivery. As an exact-same like-for-like order in half-bars, the price came out at £699+delivery.. yes, that's what I thought, so I checked it twice more - £699..

Please do shop around and support independant stockists - you could conceivably be paying 2 or 3 times more for your metal than you need to..

Thread: Good Old British Weather?
16/12/2020 09:06:33

The weather-pattern of the last few weeks has been particularly bad for condensation - cold dry northerly air has been displaced by warn wet southerly air in repeated sequences of fronts passing through.. Last Sunday, in my unheated & draughty shed, everything was dry in the morning, but by lunchtime was quite literally running with condensation.

It's vitally important not to let any fabric coverings lie directly on the bed / shears / table / any machined surface, because they absorb moisture from the atmosphere and then hold it in direct contact with the metal as it evaporates, causing corrosion.

I keep everything oiled, throw a light sheet loosely over the machines to keep the dust and animal-poop off, and try to twiddle the handles / rack the saddle / raise and lower the head, etc. as & when I'm in the shed for any purpose..

Oh yes, and of course any freshly cut surfaces develop surface rust, and all my free-cutting steel gains a patina.. ..c'est la vie..

Edited By DiogenesII on 16/12/2020 09:09:08

Thread: Parting-off Tools for Small Lathe
15/12/2020 10:39:27

If you do decide on a rear-mount toolpost, be mindful that the cutting forces will be pulling upwards on the flanges of the single T slot - you will need to spread the load as much as possible to prevent them tearing out.. ..especially if the tool is placed over to the side of the slide..

..might it be better to tap some mounting holes, or make a steel pallet to mount it on..?

 

 

Edited By DiogenesII on 15/12/2020 10:45:23

Thread: Pea shooters illegal
14/12/2020 21:17:06

Just to shake you out of your reminiscences, these are what they are trying to control

Amazon UK 2.25" Heavy Gauge Wire Darts .40 Caliber

'Outdoor Sports equipment, apparently.. ..I guess most of you were teenage engineers once, if you can imagine what the possibilities are for making these a serious weapon, you can bet that it's already been done..

I should say that until this thread came up. I had no prior knowledge that such things were considered a plaything...

Thread: Looking for a fine point insert tool for turning the back side of a Ball
14/12/2020 20:53:39

JB Cutting Tools do 'em.. 10 or 12mm shank for 11mm insert

SVJCL 11 Indexable turning tool

..check which 'hand' you need..

Edited By DiogenesII on 14/12/2020 20:55:30

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