By continuing to use this site, you agree to our use of cookies. Find out more

Member postings for AJAX

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

Thread: Another chinese lathe rises through the smoke
17/11/2021 20:11:31
Posted by Dave Halford on 16/11/2021 20:59:38:
Posted by Martin of Wick on 16/11/2021 19:50:25:

Your DC motor was rated at 500W input power, as in volts times amps your 350W induction is shaft power, an entirely different thing.

Is it true all induction motors are really rated on their output power? If so then I have learned something new.

I say this because I have come across ancient* 1/4 hp motors that subjectively appear to be able to deliver as much turning force as some modern 1/2 hp motors (although I have never been able to precisely measure this to confirm). I did query once with a motor man who reckoned that older motors tended to be quite significantly under-rated on the plate with respect to expected duty, to ensure operational reliability.

What I do know from experience is that Chinese ratings appear to be for the absolute, full blown, maximum power dissipation the item will tolerate at the point of magic smoke release. Numbers are based on marketing rather than considering any actual duty. For reasonable operating, I usually assume 50% of stated values as indicative/safe power.

*ancient defined as circa 60 to 70 years old

As Jason says 'it depends' , But if you can see the plate then the current will give the game away. Older ones are easy they say 1/2hp etc and sometimes it says rating CONT which is continuous or run all day industrial motor.

Like you I have an old un, mines Ac, brushed, 1/4hp, continuous, nearly as big as a modern 3HP with a fair bit of grunt.

lathe4.jpg

The EU has upped the standards on power consumption with a significant increase in efficency they should go into 'supplied complete' machines

Edited By Dave Halford on 16/11/2021 21:02:06

Dave, I have one of those old Century motors. Repulsion start, induction run. When they get going, the brushes disengage from the commutator and it runs like a regular induction motor. Quite exciting when it starts up! This will be one of my future restoration projects as it needs a really good clean from the previous owners.

Thread: Stripping down Elliott Progress No. 1 Mk. 1 bench drill press
06/11/2021 19:42:43

I just discovered the "BEC" most likely stands for B. Elliot and Company Ltd.

Link

06/11/2021 19:39:34

I found this serial number (?) on the drill table when cleaning it up. Would anyone happen to know if it's a serial number and whether it would help date the machine? Or maybe it's an asset number of a previous owner?

BEC 53564-8

Brian

20211104-203001
06/11/2021 19:29:11

Here's another photo to give you an idea of where I'm now up to. You may note the switch cover is on the incorrect side (there's a similar sized cover blanking panel on the other side) but it happens to fit that way better and I won't be reusing the switch to control the motor, even though the switch is still in surprisingly good condition. I still haven't decided what motor to fit and I'm even toying with the idea of fitting an intermediate pulley to step the speeds down. The "arc of shame" has been filled with JB Weld and I'm quite happy with the result.

20211106-170949
Thread: VFD size
06/11/2021 08:26:12

I have 4 WEG vfd units and I can't fault them. They are high quality, easy to wire up and include comprehensive user manuals. The price is good too. No need to oversize them.

Thread: Stripping down Elliott Progress No. 1 Mk. 1 bench drill press
02/11/2021 21:51:28
Posted by Pete. on 02/11/2021 00:13:03:

That's a nice colour, good to resurrect something that's been unloved, it was probably someone's pride and joy a long time ago.

Yes, I think so. Hopefully my kids will want to keep it one day.

02/11/2021 21:49:53
Posted by Oily Rag on 02/11/2021 13:08:17:

What paint did you use then? - I'm even more impressed that it is brush applied finish, and not as I thought a 'spray job'. I've used Teamac in the past as they do a good range of colours which have matched my machines original colours - the exception being the QDM 750 discussed elsewhere as it originally had a 'Hammered' finish (reduces the need for an expensively applied filler and rub down by the manufacturer! ). Looks uncannily like Ferguson TE35 grey.

Martin

Paragon enamel gloss, "Boxford Smoke Grey"

I originally bought one litre to repaint a Boxford lathe (hence the choice of colour) but then had enough to repaint a table saw, small milling machine, and now this bench drill. It is expensive paint, but does seem to go a long way.

20211009-222826
20211102-212844
Thread: BCA Jig Borer MK3
01/11/2021 22:10:57
Posted by Dan Shouler on 02/08/2021 16:17:28:

Hello all,

Hoping someone on here could point me in the right direction. I have one of these machines, pretty much exactly as pictured, but sadly we were broken into and a part of this which I'd taken off and put on the neighbouring lathe table was stolen along with said lathe.

The part in question is pictured in William's 3rd picture from 6th May - that plate with the arm for the belt tensioner. Does anyone know where a replacement could be sourced, or failing that does anyone know where I could find a home for this sadly non functional machine? I'm loathe to throw away such a good bit of kit, but I'm similarly sad to watch it rust in the corner!

Many thanks,

Great shame that you lost a vital part. Why not try to sell it on eBay or offer it here? There are lots of people (including myself) who enjoy a challenge at resurrecting an old machine.

Thread: Stripping down Elliott Progress No. 1 Mk. 1 bench drill press
01/11/2021 22:01:48
Posted by Oily Rag on 01/11/2021 21:55:38:

How on earth did you manage to get no overspray on the living room walls, floor or ceiling?? I'm impressed.

Martin

Bearing in mind the castings are not smooth (I removed the filler when stripping the paint) I was quite happy to apply a brushed finish. I realise that I could have applied a filler and sanded down first but I'm lazy...

01/11/2021 18:59:17

Most parts have now been cleaned up and repainted and it shouldn't be long before it's all reassembled. The spindle and rack mechanism was in perfect condition, and apart from a couple of screws and knobs that I need to make there's not much else left to do. I will of course need to fit a motor but there's no rush as I already have a perfectly serviceable pillar drill.

The castings were painted using Hammerite red oxide primer (inside and out) and Paragon enamel paint. I had to thin the enamel paint using white spirit as I was down to the gloopy dregs from another job, but it seems to be just fine.

20211101-183408 20211101-183432 20211101-183652 20211101-183709 20211101-183716 20211101-183727
Thread: Smart and brown model 'L' lathe- opinions, please?
31/10/2021 08:15:48
Posted by Bob Stevenson on 31/10/2021 08:06:50:

.........New collets for S&B are avaiable but not for £82 as far as I know....if they are we will be keen to buy some so please let me know where!

Bob, if you can PM me your email address I'll forward you a quote I received by email.

Brian

30/10/2021 23:03:28
Posted by OldMetaller on 17/05/2015 12:30:35:

Hi, I've just seen a lovely Smart and Brown lathe for sale that I really fancy. I've looked on the excellent 'Lathes' website where there is a huge amount of information, but I wondered if somebody more knowledgeable than myself could comment on how suitable it would be for me, given the type of work I do?

I make small steam locomotives, normally 16mm but I've got a 'Tich' on the go too. I'm using a ML7 at the moment, but don't feel any need for screw-cutting or power feed on the small items I'm turning.

The S & M is a model 'L', plain-turning lathe. I assume this refers to the lack of feed screw and thus the lack of screw-cutting facilities. I've had a little play with it unplugged, what I love about it is as follows:

  • Cross slide and top slide incredibly solid and smooth.
  • Viewing window on the tailstock so you can see the indexed scale
  • Built-in coolant, machine light and a big, solid stand.
  • Lots of collets and a drawbar with a handwheel.
  • A spindle lock operated by sprung push button.
  • No play obvious anywhere.
  • They only want £325 for it...with tooling!

As I mostly make stuff like loco wheels, axles, bushes, chimneys, domes etcetera, the collets in conjunction with the drawbar and spindle lock really appeal to me. The one time I hurt my back in the workshop is doing up the ER 32 collets I use now on the ML7, with the lack of a spindle lock and heavy hauling on the 'c' spanner.

I would really appreciate informed comments and suggestions, I don't even mind being told I'm an idiot, as I've only been machining for a short time and know that I have much to learn!

indecision

Regards,

John.

I'm a sucker for old lathes, any lathes, actually!

You mention "big solid stand" -- I'd just want to check that you can get it home as even fairly small but solid things can be difficult to shift.

I would be somewhat concerned about the collets. It may include many collets, but does it include the ones you will need? Just for reference, I was recently quoted £82 each + postage for collets to be made.

Thread: Qualters and Smith Qdm750 Restoration
30/10/2021 22:46:42

Here's mine, fitted with a Brook Crompton 1/2 HP 3-phase motor.

I paid about £200 for the drill in full working order. All I had to do was fit a VFD + control panel. I removed the machine lamp + transformer with the intention of refitting it one day but have not found the need.

I find the slotted table and low-speed back gear very useful. The VFD makes it very easy to use and I rarely change the pulleys.

30/10/2021 22:12:49
Posted by AJAX on 30/10/2021 22:10:03:
Posted by Pete. on 30/10/2021 21:03:21:

That's a good point about the strap holding the lid on in a school environment , being back geared, it may well have been to stop curious fingers becoming crunched fingers.

I'm another owner of a QDM 750, but mine is the floor standing model with a workshop warning stating gear changes by authorized users only, or something to that effect.

20211023-213711
30/10/2021 22:10:03
Posted by Pete. on 30/10/2021 21:03:21:

That's a good point about the strap holding the lid on in a school environment , being back geared, it may well have been to stop curious fingers becoming crunched fingers.

I'm another owner of a QDM 750, but mine is the floor standing model with a workshop warning stating gear changes by authorized users only, or something to that effect.

Thread: Synthetic paint thinners PT8 vs. white spirit
30/10/2021 22:05:20
Posted by Andrew Tinsley on 30/10/2021 21:21:36:

I am interested in the OP's original question, because I use Paragon paints.

The question was "What is the difference between white spirits and Paragon P8 thinners?" The OP's researches indicate they both contain similar ingredients. So does anyone know the answer? Neither I, nor the OP, are really interested in cellulose thinners, as it is not suitable for Paragon enamel paints.

Andrew.

Edited By Andrew Tinsley on 30/10/2021 21:24:54

For my use, price seems to be the biggest and possibly only difference. I will continue using white spirit to clean brushes and if I'm tempted to try spraying (not likely at the moment due to lack of space) then I'd try white spirit too.

Thread: Which bearings for a grinder?
30/10/2021 19:54:51

I'd like an Ajax unit -- it would go with my forum nickname.

Capacitors are easy enough to replace, and if it still has the original one then it's probably about time.

Thread: Synthetic paint thinners PT8 vs. white spirit
30/10/2021 19:27:53
Posted by Dave Halford on 30/10/2021 19:07:45:

Any spraying thinners are normally 'fast'. Cellulose thinner is just about the fastest you can get, so much so that paint not immediately landing on the job is actually dry by the time it has travelled 5 ft or so. This reduces runs to a minimum.

White spirit is quite slow, household gloss taking 16 hours to dry properly.

So if Paragon paint dries relatively fast for brush paint say to or three hours, white spirit will slow it down and the overspray will paint surfaces you didn't want painting like the windows.

You could have 'cleaned up' just as easily with cellulose, which which is very aggressive and so is very good at removing paint. That doesn't mean you can thin any paint with it and still use it as paint

Thanks Dave, that's useful information. Looking at the details (below) it would seem that white spirit could slow things down a bit. But that wouldn't be problem for me.

Touch dry:- 2 Hours. Firm dry:- 6 Hours. Hard dry:- 12 Hours, @ 20ºC.

30/10/2021 17:43:10

I'm hoping that someone with some knowledge of paints and thinners can offer their opinion.

I have used Paragon Paints enamel paint on two or three recent projects. I have brushed (not sprayed) and cleaned up using white spirit without difficulty.

In their instructions, they state that we must use their own brand PT8 synthetic thinners.

"Please do not make the mistake of using cellulose or other types of thinners with our enamels, this is not a cellulose thinners and is manufactured specifically for the Paragon range of enamel paints."

However, I have checked the MSDS datasheet for PT8 thinners and white spirit and they appear to contain the same substance.

CAS No.: 64742-88-7

Unless you can tell me a reason to do otherwise, I will continue to use white spirit for cleaning and thinning for spraying (if the need arises). As you might guess, white spirit is much cheaper.

  • PT8 thinners (1L for £9.18)
  • White spirit (2L for £3.99 from a well-known store)
Thread: Progress with the Progress drill
22/10/2021 12:17:18

I left the paint stripper on overnight and it has softened, but not enough to allow easy scraping/brushing off. I have applied another coat (I don't expect it to make much difference) but also contacted a local shot blasting company to request a quote. Does anyone have a rough idea how much this would cost? £50 - £80 is my guess but I could be way off.

I cleaned up the column (very heavy!) and two step pulleys.

20211022-094352 20211022-111538
Magazine Locator

Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!

Find Model Engineer & Model Engineers' Workshop

Sign up to our Newsletter

Sign up to our newsletter and get a free digital issue.

You can unsubscribe at anytime. View our privacy policy at www.mortons.co.uk/privacy

Latest Forum Posts
Support Our Partners
cowells
Sarik
MERIDIENNE EXHIBITIONS LTD
Subscription Offer

Latest "For Sale" Ads
Latest "Wanted" Ads
Get In Touch!

Do you want to contact the Model Engineer and Model Engineers' Workshop team?

You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.

Click THIS LINK for full contact details.

For subscription issues please see THIS LINK.

Digital Back Issues

Social Media online

'Like' us on Facebook
Follow us on Facebook

Follow us on Twitter
 Twitter Logo

Pin us on Pinterest

 

Donate

donate