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Member postings for Johnboy25

Here is a list of all the postings Johnboy25 has made in our forums. Click on a thread name to jump to the thread.

Thread: Help with a boxford c
08/10/2019 22:54:29

Ian... I’ve changed the headstock to the idler shaft V belt on my model A. It wasn’t as bad as I thought after reading the Boxford ‘know you Lathe’ book. Preloading taper bearing with new high spec grease was worth the effort. Belt were readily available on Ebay but may I suggest, pay a little extra for a branded make like Dunlop or Gates (others are available)

John

Thread: Has to be seen to be believed
05/10/2019 17:08:40

Weight it in! Might get the price for fuel to get to scrappy! 🤔

Thread: Current leakage om CNC
26/08/2019 09:58:24

Old mart - there are recommended RCD for these applications - I don’t know specifics and are not confident to advise. I’m just aware of this problem. I’ll,try to do some trawling/research on the subject as I’m sure I’ll be asked about again sooner or later.!🤔

John 🙂

Thread: Trouble Cutting Silver steel
26/08/2019 08:41:34

Jason B - can you tell me what the grade/material the insert is please?

John 🙂

Thread: Ultrasonic toothbrushes
25/08/2019 07:38:05

Mmmm... interesting thread. I would have thought the ultrasonic sound/vibration would have sent the hound running miles!

I must try some ultra sonics on our dog... 🤔

John

Thread: Current leakage om CNC
25/08/2019 07:23:49

Fizzy... listen to what Joe has written.

As a retired Electronics & Electrical Engineer I total endorse what Joes written.👍

John

Thread: What Did You Do Today 2019
25/04/2019 10:22:58

Ian P

correction - I should have said the nitrile ‘O’ rings are not UV resistant. 😳 (Dyslexic)

Duncan - thanks for that. I’ll try to put that into my memory 👍

25/04/2019 08:43:56

Ian P - “I have a question about the actual 'O' ring you used. The majority of seals easily available are black in colour. I have seed silicone rings which look red/brown and some green 'O' rings, what type are the ones in the picture and who stocks them?”

Ian... if my memory serves me well - the red or orange ‘O’ rings are high temp silicon, the green ones are Viton (we used these on multi fuel systems in engine test bed applications) and the standard black ‘O’ rings are Nitrile. (I’ve noticed these are uv resistant)

There is an ‘O’ ring specialist in Aldershot, Hampshire under the name Mantek **LINK** unfortunately they have dispensed with their trade sales counter so it’s technical help only by ‘phone. The type should be easily obtainable. I hope that helps.

‘Usual disclaimer - no affiliation with firm but I’ve bought from these before.

John

Thread: Rivets
24/04/2019 20:18:29

Hi Peter. I would suggest using a hand reamer of the same size of the original hole. This will only take out the paint and not enlarge the hole for the rivets.

John

Thread: Clarkson Tool & Cutter Grinder Fixture
22/02/2019 23:00:13

Peak4 - thanks for the info - really useful stuff.

John

22/02/2019 20:23:39

I only have a manual for this. I’ll take a look to see how much detail there is to see if it’s feasible to make some CAD drawings. If you make patterns up I’d be interested in obtaining a set of castings. Have you looked on lathes.co.uk for info?

**LINK**

John

Edited By Johnboy25 on 22/02/2019 20:24:33

Thread: Lunar Eclipse
21/01/2019 10:42:32

Managed to get a glimpse around 0400hrs - patchy cloud here (Berkshire,Surrey & Hampshire boarder) with some local light pollution. But still fascinating to see.

John

Thread: The Workshop Progress Thread 2019
18/01/2019 20:32:09

Started the Year New well by making the rear leaf springs for my GWR 16xx. I’ve located a supplier of spring steel strip which I’ve rolled to the curvature needed for the spring sets. Now I have to research heat treating & tempering as I haven’t made leaf springs before. 😳 Some experimenting & trials before I attempt the leaf springs! (Any advice welcomed) I’ve also started the pipework for the loco. Set myself an optimistic target to get the engine in steam by the end of February 2019🤔

John

Thread: USB memory sticks
31/12/2018 09:31:21

Rod. I’ve heard of bad experiences with reliability on ‘cheap’ memory cards used in video camcorders. For something you may need to backup - I’ll go cheapest branded deals in supermarkets. Purely on the basis there buyer hopefully would buy conterfiet products. The same goes for batteries too. Just a thought🤔

John

Thread: source of gauge glass
31/12/2018 09:23:46

David - are you after pane glass or round tube water gauge glass? Microscope slides might be worth considering but if it’s water gauge tube - I’ll have a look in my miscellaneous glass tubing box and I’ll get back to you.

John🙂

Thread: What did you do Today 2018
13/12/2018 14:53:23

Rod... what material did you extrude on the 3D printer to make the extender/adapter for the stepper motor & rotary table?

John

Thread: Boxford Model A stopping on slow speeds...?
27/10/2018 13:00:14

JP....

I too use a straight SAE 20 mineral oil for all the places with the Ball Oilers and one or two squirts of Castrol LM grease on the Headstock now and again depending on usage. The tightness of the drive belts are optimised to try to reduce general vibration to a minimum.

Search either this site or the web for a PDF copy of 'Know Your Lathe'. this is the Boxford publication of the lathe manual and some good operating practice.

John

23/10/2018 23:38:41

Is the back gear partially engaged? The level on the front of the headstock I think is in the wrong position I’ll check in the workshop tomorrow morning!

Edited By Johnboy25 on 23/10/2018 23:41:14

Thread: 3 phase
21/10/2018 14:00:12

‘Horses for courses’. If I manage to move to a more rural location and there’s three phase on the property I’ll use it for the workshop but until then I happy using VFD inverters with single phase for my needs. I’m not a fan of rotary or static converters. I find the options available with VFD’s such as soft start, deceleration and dc braking for emergency stop function for example most useful. Another advantage is that youn can run the motors at 60Hz (as with my American surface grinder) to get the extra 20% increase in speed. Having said this I’ve being using inverter for increasing power efficiency as well as speed control on industrial equipment since the 80’s on three phase supplies as standard. At the end of the day it’s what your familiar and most comfortable with. 🤔👍

John

Thread: 3 phase converter help needed please
06/10/2018 09:59:06

George - any updates on progress?

John

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