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Member postings for ega

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

Thread: The Workshop Progress Thread (2017)
24/08/2017 10:18:22

john carruthers:

Thanks for the additional information about this nice little tool. My query was prompted by wondering how a spiral blade would react to what look like conventional guides; presumably, the spiral is run without guides.

Shame about the supply position but, of course, a good 1/4" blade will cut quite small radii. I, too, am a satisfied Tuffsaws customer.

Thread: What Did You Do Today (2017)
23/08/2017 16:52:05

"but I'm still despairing how we will fit everything into the car"

Neil Wyatt: take heart! If my experience is anything to go by then, over time, the student will realize she doesn't need half that stuff. KWIL's post tends to confirm this.

During the three year period I managed to avoid mentioning that in my case it never occurred to me or my parents that I should get to university other than by my own efforts! She made it all worth while by loving her time there and taking a good degree.

Edited By ega on 23/08/2017 16:54:19

Thread: The Workshop Progress Thread (2017)
23/08/2017 11:57:56
Posted by john carruthers on 17/08/2017 08:07:05:

Today I acquired a Tyler Minor band saw, nice little thing, cast ally frame not pressed tin,small footprint and very quiet running.
It is only missing a 1/2" circlip to retain the top wheel.


bandsaw.jpg

Does it indeed have a spiral blade ie one which cuts in any direction?

Thread: Effect of Tensioning a Boring Bar
21/08/2017 14:37:19

Thanks to jimmy b and all the others for this fascinating glimpse into the world of patentese.

Bearing in mind that the original topic was *small* diameter boring bars my sense is that most of the methods of reducing chatter proposed would be impractical. The good old between centres boring bar may be the answer for the amateur.

19/08/2017 17:13:28
Posted by jimmy b on 19/08/2017 15:19:39:

here is a video on using Kennametal damped boring bars

**LINK**

theywork!!!!!!!!!!

Interesting video but how many model engineers need a 1" or more diameter boring bar?

The adjustable tuning mechanism was not described. Do you know what principle is used?

Thread: Fobco Yellow?
19/08/2017 16:37:00
Posted by Mike on 19/08/2017 15:21:08:

I found the yellow on my Fobco Star such a yucky shade I painted it as near as I could get to LNER apple green. Does that make me a vandal? Maybe............

Not in my book, although I notice that the photo on page 67 of yours dodges the issue by being monochrome!

I think the Myford cream/yellow is yucky, too and re-painted my ML8 with light green Hammerite.

Thread: Blunt hand rea.mers
16/08/2017 12:38:01

Andrew:

Thanks for the recommendation about the Hemingway kit.

I didn't like to ask if you had finished your Quorn (!) and hope you will soon be able to get back to it.

16/08/2017 09:04:26

Andrew Tinsley:

What floating reamer holder are you using, please?

I assume you are boring before reaming.

I would also be interested to know what allowance you leave for the reamer.

Trust the sciatica is better.

Thread: How do I trace a Tool Registered Number?
15/08/2017 21:48:08

No magic from me, I fear but I did check Salaman's Dictionary to see if I could see your tool - nothing quite like it there.

If it were not for the marking I would say this is a refined, shop-made version of the traditional scratch stock.

I think Preston tools were invariably marked as such. I, too, would like to know more about the registration system.

Thread: Blunt hand rea.mers
15/08/2017 17:02:51

Clive Hartland:

Yes, the same tip was given to me by a toolmaker friend. I think the effect is rather like setting up a cabinetmaker's scraper.

Thread: Dore small boring bars
15/08/2017 16:49:15

Nige:

Thanks for your response.

I don't remember whether you have GHT's Model Engineers Workshop Manual which has a truly excellent chapter on boring tools.

I think it would be fair to say that hurry was not what he was about either.

15/08/2017 16:44:21

On Rainbows' value for money point, I followed up a recommendation by richardandtracy for boring bars direct from China and now have a 7mm dia bar which must be about as small as is possible with a CCMT06 insert. The cost complete with ten insert was under £8 and on test the bar works quite well. It is long for its diameter at 125 mm but, of course, is used with minimum projection from the holder.

My preference remains for a nicely-tuned bar with HSS bit.

15/08/2017 09:31:49

Has anyone mentioned that the push rod avoids the need for a grub screw at the business end of the bar?

Nige: I trust you are enjoying MC's excellent book.

14/08/2017 22:17:32

I have just confirmed my recollection that the earlier (ie Neil Hemingway's) catalogue did not contain the claim that "Tension, induced by the pushrod, makes even the smallest tool surprisingly rigid" (and I have not seen this suggestion in relation to other push rod-based designs).

The primary function of the push rod is to secure the cutter, of course, but, instinctively, the claim seems valid; my understanding is that the reverse ie compressing the bar would make it stiffer.

Perhaps the OP should ask Kirk Burwell about this.

PS presumably the claim could be tested empirically.

Edited By ega on 14/08/2017 22:23:52

Edited By ega on 14/08/2017 22:42:51

Thread: cleaning stainless steel
13/08/2017 11:16:43

The Americans often refer to milk paint (casein?) which is apparently the very devil to remove (its use may have antedated the invention of Dr Pepper).

Thread: Bending and welding acrylic sheet?
13/08/2017 11:12:02
Posted by Russell Eberhardt on 13/08/2017 10:10:40:

Am I the only grumpy old git who gets annoyed by the use of an adjective in place of a noun.

Acrylic sheet, yes. Acrylic plastic, yes. Acrylic, what does that mean? Have you ever heard of white metal being called white?

Sorry, end of rant. Not getting at anyone here. It seems to be common usage.

Russell

Edited By Russell Eberhardt on 13/08/2017 10:13:02

"acrylic" first appeared in the COD in the sixth edition of 1976 where it was both adjective and noun (in that order). My most recent popular dictionary (Chambers Concise) gives it first as a noun! By way of contrast, Collins COBUILD based on computer-analysed word frequency treats acrylic as an adjective.

"Wight" can be a noun.

I am certainly a GOG but I try not to get annoyed by these things.

Thread: Machining Tungsten
13/08/2017 10:58:23

It looks as though the heaviest safe material is gold?

Thread: Bending and welding acrylic sheet?
12/08/2017 16:33:59

Andrew Tinsley:

As you say, Perspex is (or was) a brand name. I have photo'd the label from some similar material (about 2 sq ft priced at 35p!)

dscn1404.jpg

As you will no doubt see, I have had to put two torn labels together to make substantially one.

Thread: cleaning stainless steel
12/08/2017 14:23:26

Michael Gilligan:

No apology needed in my case - I have missed your input.

I thought from Monoman's post that this was another case of specification creep (you may remember our discussion about Pear's soap). It may be nostalgia but my recent purchase of Jenolite seems less effective than before.

What is the difference between ortho and ordinary acid?

Thread: Bending and welding acrylic sheet?
12/08/2017 14:12:30

Andrew Tinsley:

I think your hot air gun with cylindrical former is well worth trying. By a modest coincidence, I tested this method of bending acrylic just the other day using the high setting on a cheap B & D hot air gun.

dscn1403.jpg

I should perhaps point out that the material is some decades old and its brittleness is apparent from the holes which were probably made with a hole saw. I didn't use a former and just continued heating until the sheet was willing to bend. From previous attempts I know that overheating causes undesirable bubbles.

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