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Member postings for john carruthers

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

Thread: Hello from Swansea
20/02/2022 09:20:30

Hi Martin, I'm down the road in Port Talbot.

Thread: What is this?
16/02/2022 08:59:21

As a kid I would earn my pocket money by cleaning my old man's brass , an RM band sergeant, lots of blanco and brasso.
I used various bits of card cut to shape mainly to keep the brasso off me as the various badges all dismantled with split pins and plates behind, or unscrewed.
The pith helmet with its chin strap, Brunswick star and globe on top could take a morning
Picking out the cast brass lettering with a pin

Thread: Run out on bar
11/11/2021 08:45:24

1: First check the runout of the chuck register and also the interior spindle bore.
Meticulously clean the spindle and chuck threads.

2: Try swapping the jaws around into different slots, see which position gives least runout.

Even if you get it close with that diameter bar it may differ at other diameters.

3: get a 4 jaw chuck for critical work.

A 3 jaw scroll chuck may be better or worse, no guarantees.
A 4 jaw can be dialed in.

Thread: Filing machine uses?
08/06/2021 08:22:25

Clickspring uses one for clock wheels and frames.

Thread: Help , can someone provide me with some equations !
30/05/2021 08:52:09

It doesn't apply with your rubric, but a counter weight might simplify the working out?
Like a telescope drive.

Thread: Any views on using Fairy Liquid in a concrete mix
26/05/2021 09:16:03

As a plasterer's mate I used a few drops in a mixer load as a deflocculant to prevent the mix balling.
Mainly happened with dryish mixes like floor screed.
Never used it with concrete.

Thread: Greetings from sunny south wales !
25/04/2021 09:02:04

Hello Noonoo, I moved to Port Talbot a couple of years ago and have more or less organised my shed now.

Thread: What Did You Do Today 2021
02/01/2021 11:03:31

Start the year as I mean to go on, mucked out the shed, made a mandrel to hold a set of mod1 gear cutters, made a couple of trial gears.

Thread: Door stay help
12/08/2020 16:38:23

This sort of thing?

I've fitted many to boats, caravans, greenhouses etc....
toolstation stay

11/08/2020 08:40:55

We would fit 'restrictor stays' as a safety option, mainly on tilt&turn windows on upper floors to avoid people falling through. They are a simple toothed bar that clips onto a stud.
They can be fitted to doors and would give some adjustment to how wide it opens.

Or, how about a damper style restrictor as used on caravans, boats, etc ?


Edited By john carruthers on 11/08/2020 08:56:27

Thread: Stepper Motor Flexible Coupling.
10/05/2020 10:34:59

We have used Oldham couplings for many years in telescope drives using steppers and VFO drives, never had a problem from the antarctic to the equator.
Even using software and encoders to cancel backlash, scope drives are very sensitive to drift as any astrophotographer will tell you where mili arcsec pointing is the goal.

Thread: Air supply to test run steam engine.
08/05/2020 09:00:56

For testing I use either a plastic pipe from the coffee machine steam outlet, or a hand pumped garden sprayer.
An old fridge compressor could be pressed into service?

Thread: Holding glass lens for grinding
27/04/2020 18:36:00

Ingals ATM vol 3 page 35 >

I have them in pdf if you need them.

Edited By john carruthers on 27/04/2020 18:37:01

Thread: What Did You Do Today 2020
01/01/2020 09:54:03

mini saw blades

Thread: Adhesive to bond metal to glass
01/01/2020 09:21:56

Try your local car dealership, they use a UV bond for attaching rear view mirrors to windscreens.
You could use high modulus silicone mastic but in both cases try to avoid contamination with silicon furniture polish. It is tenacious stuff.

Thread: What Did You Do Today 2020
01/01/2020 09:18:21

I ordered a set of mini saw blades (like slitting saws) from a Chinese supplier on xmas day, they arrived yesterday so I roughed out a 'scape wheel for the clock..

scape wheel.jpg

Thread: Resilient motor mount retaining clips.
22/12/2019 09:09:38

Have you tried high modulus silicone sealant? squirt it into the rings, let it set off.
Lightly grease any parts you don't want stuck.

Thread: The Workshop Progress Thread 2019
28/11/2019 09:09:57

After a year or so of renovating the new house I have finally found time to play in my shed.
This arrangement allows me to cut spur gears.
I used an old bolt for the single point cutter but will be ordering a cheap set of mod 1 cutters from China.

gearcutter2.jpggear cutter1.jpg

Thread: Watch and Clock Escapements
28/11/2019 08:53:40

Thanks for that, I'm at the stage of thinking about an escapement for a sidereal clock.

Thread: Thread sizes on flexispeed meteor lathe
20/08/2019 08:33:21

The spindle nose is 1/2" x 16tpi
If you look in my Flexispeed album there is a copy of the old type written manual..

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