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Member postings for Dick H

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

Thread: How to create carvings with CNC
15/07/2022 20:07:38

One of the members (name forgotten) here has a web site (search Chesnut Pens) . There you will find downloads for converting photos into lithophanes and a few more interesting bits and pieces.

Thread: cutting pyrex tube to length
16/04/2022 18:24:20

Gently scribe a line round the tube and hot spot it by heating the end a bit of glass rod to red heat and touching the hot end on the scribed line. Hopefully it will break along the dotted line. Briefly flame polish the cut end.

Thread: DAB radio
30/12/2021 12:09:37

I had similar problems and built a cheap and cheerful antenna based on a bit of coax. I can´t find the recipe I used but this link shows you how* Link * (https://iamjoost.com/2018/02/17/diy-dab-antenna/). You need a bit of tape or shrink tubing to make a tidy job of it and stop the braid unravelling.

Before this I had the normal indoor dipole type which used to come with receivers and people wandering about the room would cause shadowing and fallout. Seems to work (at least here in Bavaria) for DAB and FM The transmitters are about 50km. away.

Thread: What to do with a sticky (as in toffee) portable radio
25/12/2021 19:48:38

The soft touch coating is probably a polyurethane which breaks down with age. This* Link * (https://patents.google.com/patent/WO2012089827A1/en) describes the problem, the polyester segment hydrolyses, the molecular weight drops and you land up with a sticky mess.

Thread: Where to buy hss sets at good price in european online shops?
21/12/2021 14:58:50

Perhaps not the cheapest but have a look at RC Machines. **Link**. I´ve used them a few times over the years. 16mm seems to be the biggest they do.

https://www.rcm-machines.com/de/zerspanungswerkzeuge/drehmeissel/drehmeisselsaetze/hss/8-tlg.-hss-drehmeisselsatz,-schaft-16-x-16-x-100-mm/rcdms16-8

Thread: John Wilding 8 day Weight Driven Wall Clock
22/11/2021 19:12:57

To Zachary Rohrer,

The second hand pushes on to a tapered extension of the arbor that carries the escape wheel. You can see it in my photo from 09.06.2017 and Stephen Benson´s photos from 30.12.2016. I built my clock with steel pinions according to the second spiral bound book from ritetime publications. I also have the red jacketed first book which uses lantern pinions. The layout and other details of mechanism in the two books are subtly different so beware.

Thread: IKEA Kitchen Carousel Peg
02/11/2021 19:19:56

Try mito3d.com searching with utrusta, you get a couple of hits eg.

https://www.prusaprinters.org/prints/16642 ?

Thread: Synthetic paint thinners PT8 vs. white spirit
30/10/2021 20:03:38

If you go with too a volatile a solvent when applying the paint you may get artifacts such as an "orange peel" surface.

30/10/2021 19:19:13

See wiki on "White Spirit" https://en.wikipedia.org/wiki/White_spirit. Both white spirit and the material supplied under the CAS (Chemical Abstracts) No. 64742-88-7 are hydrocarbon mixtures, i.e a bit of straight chain alkanes, cyclic alkanes perhaps a touch of aromatics. The mixtures are usually classified by their boiling points. Your mix is White spirit type 0, (See https://wedocs.unep.org/bitstream/handle/20.500.11822/29645/HSG103W.pdf?sequence=1&isAllowed=y), it appears to be a bit lower boiling, ie. more lower alkanes. So white spirit in general would probably work but this particular cut would be best.

Chemically celullose thinners are a different kettle of fish ( see https://en.wikipedia.org/wiki/Lacquer_thinner) covering more polar solvents such as ketones and esters (ie. things like acetone and MEK and esters such as butyl acetate (pear drops smell)).

Thread: Chemical Etching of Glass
25/10/2021 13:46:39

The original post referred to a product where there the ammonium bifluoride is in the form of a cream or paste and thus less likely to splash. Even so, good safety specs or a full face visor, proper gloves (i.e. Marigolds rather than a thin disposable gloves) and a plastic apron. There is an interesting discussion at https://www.finishing.com/94/62.shtml.

Thread: Questions regarding Proxxon pd 230 lathe Chuck mounting/Spindle
16/04/2021 09:55:04

If there is a taper it is very slight, I measure the dia. at 22.04-22.10mm with the digital calipers. It´s too tight to get my little micrometer in. Eyeballing it I would say there is no taper.

16/04/2021 09:31:04

The boss on the end of the PD230 spindle is about 22.04mm in diameter and protrudes about 7mm. (At least on my model which dates back to 2006.)

PS. Don´t confuse the PD230 and PD250, I'm not sure their chucks etc. are interchangeable.

Dick.

Thread: Source of 2 inch balls for water pump
08/04/2021 13:44:45

Probably fiendishly expensive but you could give this lot a ring: (the Precision Plastic Ball Co.) - https://theppb.co.uk/.

Thread: 3D Printed Pulleys
07/02/2021 20:34:53

Daft suggestion, print the pulley in two halves and screw the two halves together.

Thread: Walter dividing head
02/12/2020 21:01:00

In German but with photos.

https://forum.zerspanungsbude.net/viewtopic.php?t=11546

Hope this helps. Search under Walter Teilapparat.

Thread: Pivot Steel
06/11/2020 21:51:51

Just use silver steel and harden the ends afterwards, blue pivot steel can be a pig to work.

Which version of the JW 8 Day Wall Clock are you working from?

Thread: PC unable to read PNY flash card
05/11/2020 21:57:05

Does the USB stick show in Disk Management? I forget how to get to it in Win 7.

Resist all requests to format something!

It might be something as simple as the USB disk not having a name or a letter (H:,J: etc),. In disk management look for a disk with the right size.

Google USB, Win 7 and Disk Management. I´ve had one of these but it was a while ago.

Thread: Soluble hard varnish that sticks tightly to metal?
03/11/2020 11:31:15

How about polystyrene (eg. CD case) or a bit of Lego (colourful ABS) dissolved in acetone to make a paint? Use acetone again to remove.

How hard are you abrading it?

Thread: Optimum products?
18/10/2020 19:57:14

I´ve got one of their bandsaws, it works and you can get spares here. Else it looks like many other offerings. The first think it did was to eat the rubber tyres that drove the blade. Dick.

Thread: Troubleshooting Instructions
18/10/2020 19:52:27

Press any key to continue. Where´s the "Any Key"?

If is was you I wouldn´t have started from here

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