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Member postings for Sandgrounder

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

Thread: My Faircut Lathe
20/08/2019 06:52:33
Posted by Andy Carlson on 19/08/2019 23:02:52:
Posted by Sandgrounder on 19/08/2019 15:18:58:

Thanks for the manual, although I hope I'll never need it for my motor.

It does tell you how to change things around if you want to mount it sideways up so if I am understanding your pic correctly then it might be worth a read.

The screws on mine came undone without too much assertiveness - just a proper big screwdriver to fit the big slots but the chap in a vid on YouTube had to use an impact driver so YMMV as they say in the.US.

Thanks for that Andy,

I'd downloaded the manual and had a quick read but the bit about sideways mounting hadn't registered, I'll look into doing it.

John

19/08/2019 15:18:58

Thanks for the manual, although I hope I'll never need it for my motor.

19/08/2019 10:10:52
Posted by Andy Carlson on 19/08/2019 08:03:54:
Posted by Sandgrounder on 19/08/2019 06:53:03:
Posted by Dave Halford on 18/08/2019 20:32:38:

Motor looks familiar 1/4hp American Century Electric Co. with brushes, WW1 vintage?

Edited By Dave Halford on 18/08/2019 20:35:42

I've got a 1/2HP motor of the same make which I use for a buffing machine, in addition to the brass plate shown mine has an additional plate reading 'Refrigeration Motor'.

Care to share any photos of your motor?

This is the best I can do at the moment, the camera does'nt seem to do close ups very well, and excuse the workshop clutter as I'm just re-arranging things, I've tried to crop most of it out. The motor serial no is 958784

motor.jpeg

nameplate.jpg

Edited By Sandgrounder on 19/08/2019 10:11:50

19/08/2019 06:53:03
Posted by Dave Halford on 18/08/2019 20:32:38:

Motor looks familiar 1/4hp American Century Electric Co. with brushes, WW1 vintage?

Edited By Dave Halford on 18/08/2019 20:35:42

I've got a 1/2HP motor of the same make which I use for a buffing machine, in addition to the brass plate shown mine has an additional plate reading 'Refrigeration Motor'.

Thread: Edison thread tap
31/07/2019 13:24:46

Thats all it is, very simple and if you do have a go at something similar I've just measured it and the material is 0.6mm thick and a bit springy, so something perhaps like nickel silver sheet would be best but I've never worked with it so can't advise, but it is used a lot in electrical contacts etc or some grade of brass sheet?

31/07/2019 12:26:30

I obviously don't know exactly what you're doing or the standard and appearance you want the holders to be, but Edison screw lamp fittings can be very simple and still work very well as an ES10 holder I removed from an old radio shows.

es10.jpg

30/07/2019 07:18:38

Never thought about it before but would there have ever been any taps made? The only Edison screw threads I've ever seen are the ones, both male & female, that are formed in thin brass tubes for the bulb cap and holder.

Thread: Acetone
28/07/2019 09:16:12

I've used quite a bit of acetone in the past fitting out a GRP boat, one thing I've noticed now that I don't use it very often is that the polythene containers can deteriorate and start splitting after a year or so, but not as I would have thought at the bottom which is contact with the liquid, but the top in contact with the vapour.

Thread: How to cut metric threads on an imperial lathe and vice versa.
23/07/2019 20:04:55

I never disengage the leadscrew, at the end of the thread I stop the lathe, turn the cross slide handwheel one full turn to withdraw the tool 2mm ( if that's sufficient ) then reverse the lathe just past the start of the thread, turn the cross slide handwheel one full turn in plus the next cut and proceed.

Thread: Surplus subjects learnt at school.
19/07/2019 20:04:10

Football?

Thread: Threads used on electrical brass fittings
19/07/2019 14:14:26

There is a 'British Brass' thread which is exactly 14mm dia, actually 0.5512" and at 26TPI very close to 1MM pitch.

from Machinery's Screw Thread Book.

Edited By Sandgrounder on 19/07/2019 14:15:34

Edited By Sandgrounder on 19/07/2019 14:17:22

Thread: Different ways of boring a hole
14/07/2019 16:00:18
Posted by Phil P on 14/07/2019 15:04:58:

if you want to be quick but not fussy about the end result you can bore out a long hole on the lathe, but the tool will be springing and flexing all over the place and the method relies on your lathe being in perfect alignment and being able to turn absolutely true over a long length.

Phil

Wouldn't the spring or deflection in the boring bar stay the same for the full length of cut assuming the depth of cut and feed rate stay the same?

14/07/2019 13:41:07

I'd try to do it in the lathe if possible, a Myford 7 rather than use the Sieg 2, especially if the difference between the pilot hole I could drill and the finished bore is quite big and the depth of bore is quite short as this means stopping the mill every few seconds to slacken the boring bar off, adjust it and tighten, it's much quicker in the lathe,

Thread: Myford Super 7 Spindle Lock
09/07/2019 19:23:04

I thought all Myford S7s had a built in lock, mine does and it's shown as 'item 32' a 'pulley lock assembly' in the Myford handbook, pages 40 & 41, just push it in while turning the chuck and it locks letting you unscrew the chuck.

Thread: Info needed on Crown chuck
30/06/2019 15:40:14

Probably of no help whatsoever but I've just looked at a couple of Crown 4" four jaw lightweight? chucks (about 30mm body thickness) that I have, and these are stamped on the front face,

"Genuine Crown" and "British Made" with a crown symbol .

John

Thread: HSS or CS taps and dies
20/05/2019 15:45:06

I may be wrong, probably am, but I thought that 'red hot' would refer to the cutting edges when looked at from a microscopic point of view, although the tool as a whole would appear just warm, the working edges could have been overheated and softened.

Thread: Pivoting bolt
25/04/2019 11:56:37

I've not seen a threaded version before, but If you Google 'drop nose pin' and select images you'll see plenty of variations.

Thread: Free 2D drawing programs
12/04/2019 07:10:47

There is this one, I've never used it though.

https://www.cad-schroer.com/products/medusa4-personal/

Thread: Inverter
12/03/2019 19:27:00

The manual for the Jaguar Cub inverter I have on my Myford says,

'For up to 10 starts (max) per hour the inverter may be controlled by switching the unit ON & OFF by a line supply contactor only, for up to 10 starts (max) per minute the electronic RUN / STOP input on terminhals 10 & 11 should be used. In either case the motor will freewheel to a standstill and ramp up to set speed following a 300 millisec (approx) delay.

John

Thread: Single phase verses 3 phase motor
10/02/2019 11:36:39
Posted by Brian Oldford on 09/02/2019 17:17:30:

IMHO good solid 3 phase motors of that capacity can often be picked up S/U for a song. With all the advantages of Soft Start, Infinitely Variable Speed and even Over-speed a VFD is a no-brainer.

I have them fitted to both my mill and lathe and wouldn't go back to single phase machines.

The same here, also fitted one to my Meddings Pillar drill which makes things so much easier when countersinking a hole after drilling, I don't have unscrew the pulley guard, loosen the motor, move the belt, c'sink the hole, loosen the moter, move the belt, lever it back to tension the belt and replace the guard.

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