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Member postings for Dave Halford

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

Thread: Dore Westbury mk2 alternative
07/06/2023 19:01:21

There's a Centec 2A horizontal on ebay and also a vertical head from Heritage lathes on ebay right now

Thread: How did early Automatic gear boxes on cars work?
07/06/2023 14:53:39
Posted by Bruce Voelkerding on 06/06/2023 13:04:02:

this was in the States, out in the Country. We had a '63 Ford Galaxie, color Light Blue, which developed a strange Problem in 1968. Sometimes, not always, it would burn "Oil" and leave a blue Cloud behind it like a war-time Smoke Bomb. Us Kids thought it was fantastic - naturally we named it the "Blue Streak". It was odd that it was an intermittent Phenomena. Even more odd, there was no detectible loss of Engine Oil Level. It dawned on me one Day to check the Automatic Transmission Fluid. It was quite low, so it went to the Ford Shop.

I remember the Repair Cost was surprisingly low. They had replaced something the Guy called a "Vacuum Diaphragm" which he said was in the Vacuum Line between the Carburetor and the Automatic Transmission. Today I doubt it was a true Diaphragm but rather some sort of Oil Limiting/Collecting Surface.

Bruce,

Oh yes it was smiley it was there to sense the reduced vacuum caused by the driver putting their foot down and would let the motor suck ATF if the diaphragm split.

Oddly the Ford cruise-o-matic box normally only used 2nd and top, 1st was only engaged when you flood the loud pedal.

05/06/2023 15:47:36

Vacuum capsules, put your foot down hard, the inlet vacuum drops so the box drops a gear

Thread: Equipment for brazing?
05/06/2023 11:58:31

You can of course use an old carbon arc torch with SIFbronze if like me you still have one from the 70's.

Thread: New boiler design?
26/05/2023 17:37:36
Posted by duncan webster on 26/05/2023 14:52:03:

Dry firebox is not new. Bullied Leader for one. It wasn't a great success to put it mildly, but the die hard steam enthusiasts won't accept that as a reason not claim that with a little more effort they can save the world.

Perhaps it's new because it's half dry and half wet firebox if the side stays are anything to go by.

And why is releasing 20 years of locked up carbon a green idea

Edited By Dave Halford on 26/05/2023 17:39:49

Thread: Motor Problems
21/05/2023 19:57:39

Thermal cutout. in the end cap

BTW if the motor is too hot to put your hand on it's scrap.

Edited By Dave Halford on 21/05/2023 20:15:09

Thread: Mill recommendations
21/05/2023 10:50:08
Posted by Puddleglum on 20/05/2023 14:25:20:

Is the Clarke CMD300 more equivalent to Sieg SXP1 or SXP2?

Wayne,

The answer lies in the specs tab for each machine. It is more SXP2 table wise. The Clarke is more expensive (you still need all the bits Arc bundle in) and I don't think the Clarke is a Seig and when Clarke cease to sell that model spares become unavailable.

You need to be very careful when comparing the power in Watts. Some UK suppliers will list the output watts which is a mechanical figure, others will quote the input electrical power which will be a larger figure.

20/05/2023 10:21:41

Wayne,

If you have a grand spare the Arc Seig mill bundle will start you off. Anything cheaper is a toy and will disappoint.

Less spendy are the secondhand belt drive round column type mentioned by Clive that look similar to the current Warco Major WM50. They were made in 3 sizes back in the day when Warco sold all three, they called them Economy (1/2hp), Minor (1hp) and Major (2hp). The Major was and still is enormous for a bench mill needing 1sqM of space and has been sold under various names. This is an Axminster version

The Minor is probably the best size, your problem will be fetching it yourself and making sure it has all the handwheels intact.

Thread: Turning down backplates
20/05/2023 09:41:20

Warco site is now showing reduced sale prices again

Thread: Steam paddle steamer
19/05/2023 14:00:43

Not a paddler, but anyone remember the Queen of the Broads from the 60's, Gt Yarmouth to Oulton Broad run.

Thread: 1920s Lathe spindle removal
17/05/2023 18:57:18

T&LM - I had one of those. If it is just don't take the felts out

Most 1920 lathes were built like this the section drawing will help you understand

Thread: Cables
14/05/2023 23:39:49
Posted by Stephen Follows on 14/05/2023 17:44:58:

Why is it that when one buys a power tool that comes with a new box that you cannot get the cable back in the box when you put it away?

The packers have to serve a 2 year apprenticeship

Thread: Dear Uncle Mickeysoft
14/05/2023 15:26:29

"Lets set up your browser" LATER

And oddly later never comes, and my files stay where they are put, can't think why.

Thread: Motorcycle Brake Arm
14/05/2023 11:26:49
Posted by old mart on 13/05/2023 19:50:52:

How did all the riders of Japanese bikes and the British bikes just before discs came out cope with twin leading shoe brakes on hill stops?

Edited By old mart on 13/05/2023 19:53:59

My 1974 CB175 twin leading front was much better the discs of the day and worked fine on steep hills.

Caravan brakes don't work backwards these days and you no longer have to lock the brake actuator manually to reverse it.

Thread: Workshop floor advice please
13/05/2023 16:21:32

Something with a bit of 'give' underfoot is much easier on the feet and legs. Thats one of the reasons old machine shops had duck boards to stand on at each machine.

Why not lift the walking floor level to match the garage, but leave the machines on the concrete.

Thread: How to relocate a Bridgeport series 1 milling machine.....
13/05/2023 12:16:17

The only Bridgeport I've seen in an 1930's side garage had a hole cut in the ceiling for the head.

Thread: Turning down backplates
12/05/2023 16:00:34
Posted by Grindstone Cowboy on 12/05/2023 15:11:39:

"a few pence over £15"? I'm only seeing them at £26.50, otherwise I'd get a couple too. sad

Rob

Agreed.

Sale is over I bought some stuff that is now 40% dearer

Edited By Dave Halford on 12/05/2023 16:15:40

Thread: Every answer
12/05/2023 10:46:11

From my armchair and Lathes.co.

ML7: Speed Range:
As supplied to the UK market (with a 50 Hz 1425 r.p.m motor) the ML7 had a speed range of: 35, 62 and 110 in the 5.78 : 1 ratio backgear and 200, 357 and 640 rpm in open drive. Although it is perfectly possible to raise the top speed by increasing the size of the motor pulley, it is wise to bear in mind that the maximum recommended speed of the original white-metal bearing spindle is 1000 r.p.m. The writer has known machines to be run at much higher speeds, without apparent ill effect, but these were in good condition, carefully set up and with an increased flow of top-quality lubricant from their oilers; a worn machine treated like this might not take at all kindly to the treatment.
At one time, in order to permit higher speeds to be reached reliably, the option of a kit containing bronze headstock bearings and a hardened spindle was available - though at a cost well above that for the standard items. However, in later years, replacements were always provided as bronze-bearings (because the oil feed to the bearings is "constant loss", it is important to make sure that, every time the machine is run, both oilers are topped up and opened to give a generous rate of feed - one drop per 30 seconds as a minimum). I have seen countless ML7 lathes that, despite having given more than sixty years of service, still had bearings that were "spot on". Of course, the oil has to go somewhere and runs down the front and rear faces of the headstock to end up in the chip tray. If your headstock appears to be leaking oil, don't worry. However, if it's not, do worry…...it's run out.

Has anyone killed an ML7 by over revving? Possibly, but then no one would admit to abuse. Myford would not have put together a kit to upgrade the bearings if there hadn't been a demand.

Even the slow speed overheat issue depends largely on the motor insulation type and wether it's rated for intermittent or continous use. The former may suffer from low speeds.

Most VFD's are designed to be controlled via a pendant, which is why some VFD have exposed live terminating screws similar to chocolate blocks .

Thread: How they make a milling machine
11/05/2023 19:19:13

fine for me

11/05/2023 12:09:08

There's a photo out there somewhere of a prismatic lathe bed being gang milled all in one go by a big horizontal mill.

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