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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: How many years will this be on ebay?
06/11/2022 17:10:34
Posted by Bazyle on 06/11/2022 13:01:22:

Please put at least a small description rather than just a bare link.

The initial link is to a traction engine body, possibly small 3in scale. with a very shot boiler, no cylinder block and rather odd crankshaft for £1k with a rude 'no offers' notice.
Looking at the seller's hundreds of listings he is a garage trader, possibly ex antique shop owner retired and just listing all his residual stuff, or a car boot reseller.

He's no doubt a house clearer.

Probably a converted CO2 cylinder from a fire extinguisher. The Yanks would call it folk art, I call it scrap.

Thread: Dividing Head, what make is it?
06/11/2022 16:57:44

I have one of those, it's reputed to be a Jones & Shipman. Yours looks to be complete.

Pretty much self-explanatory in use. You need to keep a careful count of the holes.

I treated mine to an 80mm chuck. It's very handy for cutting small tooth count gears and milling slots in shafts.

Thread: Central heating pump bearing replacement
06/11/2022 16:47:05

Do you loosen off the big screw on the top of the unit till water dribbles out?

How black is the water? Too much black rust in the water and a low fitted pump don't mix well.

Thread: Help needed with stiff Pratt Burnerd 3 jaw chuck.
05/11/2022 10:28:35
Posted by DiogenesII on 05/11/2022 08:41:22:
Posted by DC31k on 05/11/2022 08:17:44:
Posted by Dave Halford on 04/11/2022 20:07:24:

NOS = returned

I know when you return an item you are supposed to include all packaging, but for someone to reapply the manufacturer's protective grease (the OP states he has stripped and cleaned the item) before returning it seems to me to be going to the extreme.

..if it went to a works / trade customer with two of each set of jaws binding in the same slots it probably would have gone straight back home still a virgin..?

Exactly, where I worked anything new was physically checked for compliance with the purchase spec by goods inwards quality. They would have found the jaws too stiff and bounced the chuck back to the supplier in the same condition that it came in. It goes on back a different shelf at the supplier till Fred who put it there retires and the stock gets computerised etc etc

04/11/2022 20:07:24

NOS = returned

Thread: Centec riser block
02/11/2022 20:54:31

60dg

Thread: Oil wick
30/10/2022 17:30:20
Posted by Dell on 30/10/2022 16:08:29:

Thanks once again for replies my Pultra is the 17/70 according to the manual that I have and someone has posted above it goes round the bearings then down a hole to oil and to be careful not to sever them.

Dell

Hi Dell,

There are several different types of wick oiler although they a run by capillary action.

The one linked to by Joseph uses a plain metal wire loop to lift oil up out of a cup and drip it down onto the top of a spindle surface through an oil hole in the bearing. The flow is metered by the wire thickness. It sounds far-fetched but it does work.

Another used on full sized engines uses worsted wool to lift oil in the same manner. Flow is metered by the number of strands of wool in the oil.

Yours seems to use cotton to lift oil out of a sump through the pear shaped hole (Michael's link after the first spindle photo) in the bottom of the bearing to touch the splndle. The oil should then be pulled off the end of the wick by rotation and the shallow groove will distribute it across the whole bearing.

If you try to turn the wick 90 deg and spread it across the groove I would expect a jam to happen at some point.

I had a lathe with a felt wiper that ran for the whole width of the bearing, but that was set in a slot cut right through the bearing surface and not a shallow depression.

Thread: The Mitutoyo caliper for sale ad.
27/10/2022 11:22:58

He was a Shakespeare fan (Henry V act 4)

Thread: Ideas on how to re-connect a broken thread in an alcohol thermometer
26/10/2022 20:51:33

As Bill says, overheat and the bulb blows clear off.

Thread: Non-steaming models. Sacrilege??
26/10/2022 10:38:00

Jay'

As above

Some people build engines to run them.

Some people build engines for the mantlepiece or coffee table.

Some people build engines for something to do and never run them.

Some people buy an engine to run and have no idea how to fix them.

Some people build IC or Glo engines

Some people are pedestrian builders and some build model jewellery.

We are all on here except possibly the third.

Nobody cares what you do unless you wake up the old iron new iron pointless debate or real politics.

 

Just take a look at Blueheelers vid, he's built all types.

Edited By Dave Halford on 26/10/2022 10:44:35

Thread: Harrison M300 Lathe VFD and motor options
25/10/2022 11:52:07

Some M300 were built with your option 2 motor, but the speeds were lower which suggests a different spindle gear box input gear. The low power motor had a much lower top speed.

The lathes .co entry seems a little confusing as it implies to me that the training lathe 'T' version had more power than the normal offering.

Gearboxes are very lossy compared the to belts found in your old C.

Thread: Welding course
24/10/2022 11:11:06

I've often wondered how well these courses translate back into the world of hobby machines.

I've owned a new hobby Cebora 30-135A MIG for car work and now have a 2nd hand base model old school copper wound professional Kamanchi 30-170A and the difference between them is night and day even at the bottom end.

Thread: Foxing problems occurring with relatively new books
22/10/2022 11:34:34

High humidity / lack of ventilation will do it. You may find it on the ceiling paint if you get the steps out and take a close up look.

Thread: Silver soldering Torch size
21/10/2022 12:29:24

The Rothenberger or Bernz swirl burner on MAP gas is nearly 2kw.

900W sounds like an ordinary neat butane paint burner torch.

Screwfix gives you more specs than Toolstation.

The map one would do it providing the work is stood on a fire brick or some Rockwool (not fibre glass) and not clamped.

Thread: The cheek of McDonalds
19/10/2022 19:59:09
osted by Martin Connelly on 19/10/2022 08:38:17:

Dave, your comment on the apple turnover burning you reminds me of a case from my youth. In the early 70s I worked on Saturdays and during school holidays in a department store cafeteria (clearing tables and putting crockery and cutlery through a dishwasher) that had a microwave oven long before they were cheap enough to be in many homes. We used to use it to heat pies, soup, turnovers and the like. A friend who worked in another part of the department store came in on his break. He decided to grab a jam turnover for a quick snack so I suggested warming it in the microwave for 30 seconds. When he took it out he felt the pastry and decided it was not warm and tried another 30 seconds then repeated for a total of 90 seconds. When he bit into it a trickle of boiling and bubbling jam rolled down his chin scalding him quite badly and giving him a nasty blister, he was in a lot of pain but being a teenaged boy I could only laugh and tell him he was told only 30 seconds.

Martin C

smiley

I tried to resurrect a donut once, no effect, it stayed shrivelled even when the smoke came out of the jam hole.

Doh!

Thread: Centec riser block
19/10/2022 19:37:53

Bigger than a 1" dia which is a little short on the flanks.

The Chronos 32mm perhaps, check the depth of your dovetails.

Edited By Dave Halford on 19/10/2022 19:40:53

Thread: Steel for flywheel?
19/10/2022 17:39:44

Rapid Metals £9.40 plus all the usual. Or £8.40 for cast iron

Edited By Dave Halford on 19/10/2022 17:41:47

Thread: Issue 321, Cover picture raises questions.
19/10/2022 14:05:50

It's hard to see how the operator would be hurt unless the cutter broke.

The work piece is however another matter, this sort of dodge is best left to something which will be hidden so if it does take an extra big chunk out it will be hidden. That said if the item is not held securely as well the item may be wrecked.

The habit of new mills being supplied only with drill chucks does tend to make it look OK.

Thread: Rolleiflex flashgun
18/10/2022 19:25:56

PP3 rechargables have a pile in them.

PS you will have to replace the black -ve wire as well, the gunk travels up it and turns the copper inside the sheath black.

Edited By Dave Halford on 18/10/2022 19:28:29

Thread: The cheek of McDonalds
18/10/2022 19:21:56

It's a 'treat' apparently, rich people around here feed their kids on it judging by all the high end Merc's that use the drive in at weekends.

Why would you Steve I don't get it, apart from the fries, the coffee is disgusting, but hot, it must be the cup says so and the apple turnover thing will burn you.

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