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Member postings for Brian Oldford

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

Thread: Help with finding or making router duplicator
14/01/2020 15:50:28
Posted by Journeyman on 14/01/2020 14:41:06:

Bit more up-market perhaps but is this Popular Mechanics item of any use?

John

I'm not too sure about the choice of material for the duplicate gun stock.

Thread: Co2 emissions.. Steam or diesel best?
10/01/2020 15:35:38
Posted by Derek Drover on 10/01/2020 15:13:59:

If people are concerned about the emissions from "model" steam locomotives which are used on a very infrequent basis, perhaps they should spend more time worrying about their own personal CO2 emissions and hold their breath !!

Particularly those most verciferous.

Thread: Removing superglue from an oak table
30/12/2019 17:34:35
Posted by Nick Clarke 3 on 30/12/2019 17:21:59:

Unfortunately father daughter cashflow is unidirectional - and not in my favour 😥

Nothing new there!

Thread: Stanley Blade Lathe Finishing Tool
26/12/2019 11:49:32

Interesting use of the bandsaw as a power-file towards the end of the video when he was making the knight.

Thread: 042 Locomotive plans
25/12/2019 16:48:59

Please can we use the correct Whyte notation and call it an 0-4-2 locomotive? Christmas rant over.

Edited By Brian Oldford on 25/12/2019 16:49:34

Thread: Slight repair required
19/12/2019 21:43:05
Posted by John Reese on 19/12/2019 21:30:55:

I would use oxy-acy using cast iron rod and ferro flux. Normalize after weldinf.

If iron, without a specialist muffle to do a pre-weld preheat and (more importantly) post-weld normalise I wouldn't even think about welding. Brazing would be far safer thus minimising the likelihood of producing brittle carbides each side of the weld.

Ali is a completely different ball o' wax.

 

Edited By Brian Oldford on 19/12/2019 21:44:10

Thread: MR16 LED Spot lights
19/12/2019 21:38:42

I'm a little unsure why a number of us are getting all excited about varying voltages with varying lamp-holders. Similar pattern incandescent lamps and their LED replacements have been available for years in both 24v and 230v with B27 and GU9 bases

Additionally both 24v and 110v lamps are available with E27 bases of the same pattern

Thread: magnetic motor
17/12/2019 21:20:22

Do I smell Snake Oil?

Thread: Myford Super 7b lead screw end float
17/12/2019 21:16:49
Posted by John Haine on 17/12/2019 13:13:08:

But just to note that Hemingway charge £27 for £10 worth of thrust bearings and some bits of steel and bronze. There's no need to replace the existing bush so you don't need the bronze; and the end caps to position and shield the thrust bearings can be made from a scrap of 1 inch steel bar that may well be in your scrap box.

For intellectual completeness could you provide a bearing part No?

Thread: Keyway Broaching
15/12/2019 21:02:02

Can you get access to a shaper? They are one of those much undervalued machines well suited to such tasks.

Thread: Myford Super 7 Apron removal
10/12/2019 17:30:47

I don't have the gearbox model but I can assure you the lead-screw needs to be removed to the tailstock end before the PXF apron can be removed.
I had to do that when one of the screws in the dog clutch mechanism decided to make a break for freedom. Fortunately it only damaged itself and nothing else.

Thread: a good quality milling vise for sale
09/12/2019 17:08:10
Posted by blowlamp on 09/12/2019 17:04:51:

It looks like an old vice that's had a paint job done on it to me.

That said, the jaws show very few, if any, dings.

Thread: Plumbing question
09/12/2019 16:45:37

Those with the slightest knowledge of electricity will recall water flow being analogous to electrical flow. Now apply Ohm's Law to your pipework.

Thread: Tool steel - Beginners guide ?
09/12/2019 14:40:48

Wouldn't it be possible to turn down the shank of the one suggested earlier **LINK** ?

Thread: Meddings M10 VFD?
03/12/2019 08:49:38

I completely endorse the comments made above.

Additionally I can say I had little difficulty finding the "star" point on my ancient "415v" 3/4 HP Brooks motor when I converted it for VFD use. I think the only motors that may prove difficult are those when the windings have been potted in epoxy.

The only real word of caution is not to rotate the motor at more than its centrifugal limit. Motors designed for 50Hz can do bad things at 400Hz. devil

Thread: Suggestions to pack round DC motor so bracket holds
02/12/2019 19:27:29

Would it be possible to wind a number of layers of self-amalgamating rubber tape around the motor body making sure you don't obstruct any ventilation holes?

 

Edited By Brian Oldford on 02/12/2019 19:27:40

Thread: Electronic Lead Screw Project
28/11/2019 19:39:58
Posted by Roy Vaughn on 26/11/2019 19:57:16:

Thanks for your replies, saves a bit of money compared with doing it yourself direct with the States.

Is anyone else planning to fit ELS to a Myford S7?

Hi Roy

Between my other large list of other jobs I'm in the process of fitting one to my S7.

I'm trying very hard to squeeze the stepper motor into the change gear casing at the LH end of the machine.

Brian

Thread: Diesel horn
26/11/2019 19:57:07

Try an Adafruit Audio FX module.

L

Thread: Machining an S50 casting
21/11/2019 14:23:37

I was taught many years ago, when making patterns, to always put ample machining allowance on a casting. It would seem whoever made the pattern(s) for this was absent from that lesson.
It's easier to take it off than put it on.

Thread: Positioning bushes for welding
17/11/2019 17:33:30

Weld in pieces of rod that have only been centre drilled. Weld into the plate getting them as square as possible the drill through with a mag drill.

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