Member postings for Rod Renshaw

My very elderly neighbour went into hospital for a short period recently and found the staff questioning her about her lifestyle and social contacts etc and trying to place her on a "Fragility Index."

She became nervous that the staff were trying to establish if they should put a "Do not resuscitate" note on her file.

Bit paranoid perhaps? But just to be safe, best to invent some interests and friends - just in case!

Rod

Felt wipers are used on a wide variety of lathes successfully.

If you decide to fit them and have to make your own, then chiropodists' felt ( look on the web) seems to be a good material and less likely to wear quickly than the soft felt from craft shops.

Rod

Does anyone know what "Former Member" does or did to merit the deletion of his posts?

Just being nosy!

Rod

Misread this title as shimmying techniques,

Jeff

Thanks for the instructions, but most of them mean little or nothing to me. It's probably laziness but I just don't seem to learn effectively about IT matters unless I am actually shown what to do, almost keystroke by keystroke, and then use it frequently.

Regards, Rod

I think what most puts me off getting a 3D printer is the thought that my general lack of IT skills would make it difficult for me to use one effectively.

Rod

I don't use the cm much either.

When I went into a school last year I saw young children doing some sort of practical work with card and scissors, and they had been issued with plastic rules calibrated only in whole cm. I asked a teacher about this and she said they were not allowed to use inches any more as they were regarded as obsolete, and the children could not understand anything as small as a mm. I suppose it was a solution to a perceived problem but it seemed rather a poor solution to me.

Rod

Edited By Rod Renshaw on 11/12/2020 16:30:30

Mary had an iron cow

She milked it with a spanner

The milk came out in shilling tins

And small ones for a tanner

Don (DG) Gordon, ME 1975 -76, Vol 141-142, also 1980 Vol 146 and 1981 Vol 147.mostly articles on boilers and machinery for model steamships and paddle steamers. He does emphasise the need to keep the weight down.

Rod

+! for Tug''s approach. and I agree with Tug's gut feeling that this hull is likely to be too heavy to float, especially if it is to have a steam engine and boiler.

We don't have anything like enough information to calculate this in any scientific way, some boat hulls are much finer than others. Something box- like and deep ( like a barge) will have much more internal volume than a hull with a rounded shape and shallow draft , even though they have the same length and beam. Naval architecture is as much an art as a science and even the professionals get it wrong sometimes. Best to keep the weight to the absolute minimum, you can always add ballast, but not easy to take it away.

Sorry to have doubts about this.

Rod

Edited By Rod Renshaw on 07/12/2020 10:09:14

Write an unforgettable thought down and your name will live forever.

Anon

Thanks Grindstone!

It's not often I can second guess Michael, And I still expect a clever riposte.

Rod

Michael

Oh no there isn't!

About half way down the page you have linked to is a "It's Openreach not BT Openreach" and an explanation that they removed the BT about 2 years ago.

Rod

Amongst a note from the HomeWatch about speed limits on residential roads, there was a brief and very non-technical mention that from 2022 new cars will be fitted with speed limiters which will somehow interact with sensors in the road which will "tell" the car what the speed limit is on that road, and restrict the car's speed appropriately.

Anyone know anything about this or have HomeWatch got it wrong?

Rod

I think I will postpone making one of these until there is some concensus on the measurements!

Rod

I wonder how long it will be before someone starts posting upgrades for it, and then how long again before someone starts collecting them and creating a dedicated website?

Rod

Andrew, I guess so.

I use an Arrand tailstock dieholder which also has very little float but it has three hex headed screws to hold the 2 halves of the holder together and these can be left slightly loose to allow the die to line itself up. One half (end?) slides on a mandrel that goes in the tailstock taper and the other holds the die. By experiment I find some dies cut well enough with the screws tight and some do not. Perhaps I should buy some better dies and pension some of my older ones off!

Jason. I read somewhere about someone who had approached this aspect by fitting an additional pinching screw diametrically opposite the 3 normal screws and then used the 4 screws together to centralise any dies which were very loose in the holder. Sounds like an idea which might help in some cases. Or I suppose one might try a slip of shim opposite the pinching screws to take up some of the slack.

It's odd how tailstock dieholders work well, straight out of the box, for some workers while others struggle.

Rod

Andrew J, 14.17 pm. I agree.

My point about dies being made for hand held use is that the manufacturer does not always bother much about concentricity, which hardly matters when using a "manual" die-stock.

Even a non- concentric die will work under power as long as there is enough slack in the system to allow the die to line itself up, the power produces the turning motion - and the die wiggles about, to use a technical term, to stay concentric on the part formed thread. With high quality dies this may not be an issue.

Rod

Lots of good points made by posters above.

If the diameter and the material of the stock are OK, and the technique and lubricant are OK, then the only thing left is the die which is either faulty or it's being presented to the stock off centre or at an angle?

I understand split dies are intended for use by hand held methods. Good ones will generally be concentric, between cutting edges and outside diameter, but cheap ones may not. I don't think there is any cure for a die which has the central hole and teeth at an angle to the outside faces.

Tailstock dieholders are great but they need to have some slack in them somewhere to allow the die to line itself up with the stock, some are just too rigid, "too well made!." and as has been said, a small die cannot be expected to pull a heavy tailstock.

Rod

Michael

Agreed, that's 2 omissions I am guilty of. For what its worth I tend to agree with the evidence based science approach and with the conclusions of posters like Hopper and Neil.

Rod