Member postings for Russell Eberhardt

I've allways had good service from Speedy Cables (London) Ltd. They will make cables to your spec.

Russell

Thanks, I was looking at the magazine in the archive and didn't see that.

Russell

Interesting article but it's a shame that the pull out sheet of drawings isn't there.

Russell

Sounds like an interesting project. I would be inclined to use silver steel for the bed and not harden it for fear of distortion. ER 11 collets should be fine unless you want to grip anything below 0.5 mm. This would be a good start for the head-stock spindle.

https://www.arceurotrade.co.uk/Catalogue/Collets/ER-Milling-Collet-Chucks-Straight-Shank/ER11-Straight-Shank-Chuck-with-Mini-Nut

Russell

The motor the OP linked to is designed for inverter use and is rated for input frequency from 5 Hz to 75 Hz. It has better cooling than standard motors. I fitted the same motor to my lathe several years ago and have never had over-heating problems. I still change belts occasionally but can't remember when I last used back gear.

Russell

Collets are certainly not necessary although they do help.

I built Tubal Cain's beam engine Mary as my first model. Following Tubal Cain's book made it very easy with just a lathe (and no collets).

Russell

. . . and what about double de-clutching? Synchromesh is for wimps

Russell

Yes, had one for heating/cooling in the house for a couple of years. The latest inverter models are very efficient with a typical COP of about 4.5 for heating. So for every 1 kWh of electricity used they will produce 4.5 kWh of heat. They used to be impractical in cold areas but the latest Toshiba units are rated for heating down to -20 C outside. However the COP does drop at low outdoor temperatures and they can be slow to start when it is really cold as they have to go through a pre-heating cycle in the outdoor unit. Here, where the night time temperature never goes below -8 C they are highly recommended.

Russell

Err ... power = force x velocity

So less force at the same or lower speed means lower power. Certainly production costs are lower with carbide but that includes machine time and tool sharpening costs, not relevant for most of us.

Russell

You might be interested in this clickspring video. He uses a mill but the same thing could be done on a lathe with a dividing head mounted on the cross slide.

https://www.youtube.com/watch?v=K6Ai5F8O3iI

Russell

I guess that's why the minimum diameter is specified - less likely to get blocked. However dismissing them as problematic is a bit strange. They can't be any worse than not having one at all even if they don't work!

Russell

How did you clean it? Have you lubricated it? What oil did you use? Platform escapements are very delicate and need a watch oil.

Russell

That does seem to be rather small. Here in France fusible plugs are recommended for any boiler used for public running and the smallest size in the recommendation is 1/4 Gas, that is just over 1/2 inch OD.

Russell

Try MEW issue 100, page 26

Russell

Edited By Russell Eberhardt on 14/11/2019 09:27:02

For me, the shelf life is determined by the state of the outside of the bottles. No matter how careful I am, the outside of each bottle gradually builds up a sticky residue that is almost impossible to remove with solvents but gets all over my fingers!

Russell

Those things are all well and good as long as you have strength and flexibility in your hands and wrists. As one gets older and arthritis sets in they are as bad as child proof bottles for medicines!

Russell

Yes, they are 32 or 40 depending on the pipe diameter. Usually 40 tpi for 5/32" pipe and smaller and 32 tpi for 3/16" to 3/8" pipe.

Russell

For once that is not the case. The website in question doesn't work when viewed with Firefox running on Linux, no connection with Microsoft Internet Explorer.

Microsoft do,however, have a habit of introducing new features to their website creating software which don't comply with the international standards which they themselves have helped to write!

Russell

Norman, when I did this many years ago I started by machining a pair of circular squares on the lathe, clamped them vertically to the mill table, and then clamped the square to be machined to those. That way you don't need an accurate square to start with.

Russell

I use a VPN called IPVanish. Very easy to use on various platforms. I use it when wanting to access web sites that are normally restricted to UK users but they have servers throughout the world.

Russell