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Member postings for Clive Brown 1

Here is a list of all the postings Clive Brown 1 has made in our forums. Click on a thread name to jump to the thread.

Thread: Air in steam boiler
15/06/2023 19:37:31

Steam engines usually start off with the cylinder drain-cocks open. I'd think that air from the boiler would be ejected during that time, but I don't think it would be visible separately from the mixture of steam and condensate that emerges.

Thread: Quick change tooling for the mill?
14/06/2023 15:01:12

For drilling up to 1/4" dia. in my MT3 Warco, I use a small Jacobs chuck mounted on a 3/8" dia. parallel arbor. This fits into the collet chuck that is semi-permamently fitted to the mill. Much quicker than changing the whole thing and suffices for much of my drilling, but I do have a separate drilling machine.

Thread: Drill Press Wear
14/06/2023 09:00:17
Posted by Rick Jackson on 13/06/2023 22:05:57:

At full extension, there is about 1mm movement.
When trying to drill, the run out at the drill bit is sufficient to move the material being drilled around in small circles.
The fobco has a quill locking bolt /clamp and when this is tightened all play goes away. There appears to be zero play in the bearings.
I also noticed that once the drill bit bites and starts to cut, downward pressure seems to remove the run out and the bit stabilises and cuts well.
On thing that I've not been able to determine is the condition of the chuck. Its the original Jacobs 34

 

The play that you describe won't help, but the drill point runout could be due to the drill bit being slightly bent. I've found this defect regularly over the last few years, particularly with "budget price" drill sets. Probably not too noticeable with my hand-held diy drill but very noticeable in my Fobco until, as you say, the drill starts cutting full diameter. I should say that my machine doesn't have noticeable play in the spindle.

As for the chuck, I would suggest putting in a short, straight length of round rod, say a HSS lathe tool blank or silver steel, and seeing how true that runs, especially with the spindle lock tightened.

Chuck removal, if needed, might be done with wedges, search this forum. Replacement Jacobs jaws are / were available.

When I first got my Fobco, I found the best method was trying to use a 1/2" endmill in it. The chuck detached instantly, but not recommended. smiley

Edited By Clive Brown 1 on 14/06/2023 09:03:11

Thread: Lathe spindle alignment
10/06/2023 20:14:25

I do not have experience of this particular machine, bur adjustment of the headstock bolts is unlikely to improve the alignment IMO. The more usual method of improving the alignment of a small lathe is to shim or otherwise adjust the bolts holding the lathe down to its stand. This is often misleadingly called "levelling". The idea is to remove twist from the bed. Search this forum, there have been a number of threads describing the method.

Thread: Simplex Axle springs
09/06/2023 18:32:38
Posted by Dave Wootton on 09/06/2023 18:14:01:

If you look on the Reeves site under springs there are two prices for apparently identical springs the higher price ones are in 12's the cheaper in 10's, it is not clear until you actually click on the item. which might explain why i bought 20 springs!

Dave

Ahhh! well spotted, another mystery solved. But who makes locos with 5 driving wheels?

09/06/2023 17:42:59

I bought mine from Reeves, but that was years ago. They still stock springs, but seem to have reduced the range of sizes, and, irritatingly, sell in pack of 10. For a suggestion, I'd try their 1.25" long x 3/16" bore for starters. They should fit over the hangers and aren't too pricey.

Thread: Making a large washer.
09/06/2023 15:53:35

Hacksaw an octagon 90+mm AF. Mount in 4 jaw chuck and drill / bore 39mm hole. Then mount in 3 or 4 jaw using this hole and carefully turn the 89mm dia.

Edit; Jason beat me to it, can't compete with the pictures either.

Edited By Clive Brown 1 on 09/06/2023 16:17:07

Thread: mini lathe dial accuracy
08/06/2023 19:15:25

Have you checked the accuracy of your dial indicator over the travel that you're using?

Thread: Well I never knew that - Cluppert Ring
08/06/2023 10:08:10
Posted by duncan webster on 07/06/2023 17:36:31:

When the company that made Clupets gave up the R&ER bought all the machines and set up to make them, but it didn't turn out to be the success they anticipated. The then Chief Engineer's brother took it over, I doubt there are any 'rights' involved after all this time apart from the trademark.

I've lost touch with the R & E personnel that were then involved, so can't confirm any detail, but it seems thar Clupet rings are still made by Rufforth Steam Works somewhere uo here in the NW. see here.

Thread: Collet chuck
05/06/2023 16:30:56

Where / how are you measuring runout?

Thread: Bench Grinder Bush
05/06/2023 15:37:52

It's important to make the new flange with gripping diameters the same as the old one, to avoid stressing the wheel when tightening the nut. I've found turning the wheel small angles 0n the shaft before final tightening to be a method for reducing sideways wobble of the wheel rim.

Thread: End cutting in mill
01/06/2023 11:25:10

Sounds more like a job for a lathe, you don't say if you have one. Incidentally, are you annealing the copper washers before fitting? I'm not sure that I like the groove idea.

Thread: #8-32 x 3/8" countersunk any material, 1/4" OK, preferably allen key
29/05/2023 19:14:57

Ebay shows a number of sellers here in the UK, you might best be arranging delivery to UK address, although they have, (had? ) a system of delivery abroad at buyer's cost.

Thread: Workshop Purchase (wish)list
26/05/2023 20:27:37

With all due respect to Arc, I'd be reluctant to pay £279 for a 6 - 10 mm drill set. An average of £6.8 per drillsurprise. I'd buy cheaper, not too cheap though, and add an imperial, fractional set.

Thread: Calculations of EDBHP in steam hauled locomotive performances
24/05/2023 15:26:30

Apart from dynamometer car testing, there were "rolling road" test plants at Swindon and Rugby. These methods would allow direct calculation of horse-power at the drawbar or the wheels. Other calculations presumably made assumptions on friction, gradient etc.

I don't know much about the stationary test plants, but there is some footage here.

The GWR tested their locos over quite a long period, including experimental work on draughting improvements, the benefits were seen in their general loco performance.

Edited By Clive Brown 1 on 24/05/2023 15:33:42

Thread: Classified Spam
14/05/2023 18:32:49

A money-lender has invaded the classifieds.

Thread: Quorn Tool and Cutter grinder
10/05/2023 19:42:30

Just looked at my Quorn, built long ago. The rocking lever screw is 32tpi, (not 40tpi as I suggested earlier ). I've divided the screw-head into 12 divisions each marked 4 thou. (0.004" ), ie 0.048" per turn. I can't remember how I decided on this calibration, I seem to remember the ME build notes referring to it but I can't find that reference now. A problem with this adjuster is that there is no fixed index mark to refer the scale to and, as ega says, it's a variable figure anyway.

For most of the grinding that I do, the actual cut is controlled by the front bar micrometer, with the rocking lever used as a movement stop, so usually not too critical.

Thread: copper Tube
10/05/2023 18:12:26
Posted by SillyOldDuffer on 10/05/2023 17:31:05:
Is 3¾" copper pipe a standard size? It's not listed my books

Dave.

Standard or not, lots of Allchin builders have been able to buy it in the past, but not now it seems. Back in the day when I bought mine, stockists such as Reeves could supply a large range of odd sizes. I did wonder if tube extruders would supply them with whatever was wanted for even a modest order. Bespoke extrusion dies might have been a manageable cost.

10/05/2023 16:02:50

Is there some confusion here, stemming from the OP's expression of size? The need is for tube with an OD of 3.75", not the two sizes 3" and 3/4".

M-machine list 4" od which might be closed down and with a butt-strap, to save rolling.

They also seem to list 3.75" od x 2"id, but that's a lot of lathe work to make it 13g wall.smiley

Edited By Clive Brown 1 on 10/05/2023 16:04:16

10/05/2023 14:04:04

Have you tried Reeves? They used to stock it but I suspect, like Blackgates, no longer do so. Rolling from sheet might be your best option.

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