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Member postings for Mark Rand

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

Thread: Deburring Stones (stones for deburring)
11/08/2020 23:20:15

The Oregon files I have were made by Valorbe.

Be that as it may, I use a file or a deburring tool for deburring edges in the lathe or after grinding/milling and either a dubbed (surface ground to be flatter) handle-less file or a ground flat Norton type stone or a hard flat Arkansas stone for deburring flats, depending on the level of precision needed.

Thread: Triumph motorcycle auction
09/08/2020 00:11:53

I would say that virtually all of the lots will go at scrap prices. The machines appear to be slow three axis ones, which are well past their prime. most of the tools are pot luck left overs that couldn't be used on the replacement machines. Some of the tool holders, particularlyBT30 and 40 and unused ones will go for a reasonable price.

I was at the auction of the Meriden works, having been a member of the Meriden branch of the TOMCC after I bought my TSS. What was being sold there really was scrap. I was shocked at how the factory could have made anything on the machines that were left. I don't know if John Bloor or les Harris had pre-bought any of the machinery.

As it was, I spent most of the day wandering forlornly around the site, crying my eyes out.

Thread: What Did You Do Today 2020
07/08/2020 22:39:09

The original layour made perfect sense to me, in terms of centring a piece on the faceplate. I hadn't considered orienting the tool in any other way!

Thread: What lathe tool for deburring holes?
02/08/2020 00:28:04
Posted by jimmy b on 01/08/2020 17:52:17:

If you have deep pockets, these could be of interest.

**LINK**

Jim

Get thee behind me, Satan. laugh

Thread: Quorn using E32 collets
31/07/2020 00:24:03

Not ER32, but Martin Models, in the States, do R8/5C workhead castings and drawings. I have a set maturing in the box with the rest of the Quorn bits...

Thread: Jobs
31/07/2020 00:07:18

Well, all I can say is:- Bah! Humbug!

Thread: How Best to Sell a Clarkson Cutter Grinder & Accessories?
25/07/2020 22:26:28

Personally, I would say that splitting the grinder and all of the attachments out separately is sharp practice and I would not buy from such a seller.

The grinder on it's own is almost worthless without the associated attachments, despite the prices asked for them,

Thread: Alloy stuck to cutter
19/07/2020 01:02:01

If you use Washing soda, heat it up. It is pretty slow at room temperature, but works quite quickly close to boiling point. The aluminium carbonate that results is insoluble and the reaction will stop if all the washing soda gets used up.

Thread: SuperGlue as a means of holding in lathe
14/07/2020 21:34:50

If it's any help, I was turning a 95mm dia by 4mm EN24 (quite tough) steel disc today, glued to a 50mm bar with 221 (low strength) Loctite. It did have a 5/16" bolt through it to hold it to the bar, but the Loctite was there for the torque.

The flatter the surfaces the better and if there is any possibility of a bolt or pressure from a tailstock centre it will help resist side forces.

A reasonably light tap with a hammer released the part from the bar.

Thread: New Toy
14/07/2020 21:26:18

That does beg the question of how can the feed screw be that far out? Or has the dial a peculiar number of graduations on it?

Thread: Selling on behalf of executors in 1975
12/07/2020 22:58:24

Dad's ML7B long bed, with clutch, three jaw and four jaw chucks and brazed carbide tools cost £168/10/5d in January 1965.

It got close to causing a divorce, since he added it on to the mortgage for the new house without consulting with mum. The house was £2000. I still have the lathe...

Thread: What Did You Do Today 2020
12/07/2020 22:42:35

"Write a program in C# because my Java is rusty."

Damn I'm old! My C was approved by messrs Kernighan and Ritchie and only just progressed to the new ANSI style.

I did, at one point have 65,000 lines of code in HP Rocky Mountain Basic and 24,000 lines of HP Pascal in use in the company at one time. They weren't interested in selling the programs to our customers and only missed out by a few million pounds in the process...

But at least I turned my nose up at FORTRAN and COBOL (apart from a few programs I had to translate)

Thread: Message from the prime minister
08/07/2020 19:43:36

SWMBO has just pointed out that our glorious leader has obviously never been in my workshop. crying

Thread: micro switch
01/07/2020 22:57:06

Learned something today! Been doing electronics on and off for 50 years and never realised that people used naked microswitches!

Thread: What Did You Do Today 2020
29/06/2020 23:08:32

Low precision machining and fitting of non-isotropic material has proceeded nicely in the shed. Tomorrow I hope to weld it together,,,

frame.jpg

Thread: Upgrade to Microsoft Edge
27/06/2020 20:55:54

Bah! Humbug!

24 hours to compile and build GCC

12 hours to compile and build glibc

24 hours to compile the X window system

18 hours to compile Mosaic.

Now you tell me I've got to upgrade it?

All timings were about the same on an HP9000 320 and a Sun 3/50, not surprising since they had very similar performance. Those were the days!

Thread: Ring rollers
25/06/2020 23:24:29
Posted by IRT on 25/06/2020 22:56:24:

I am looking for plans for a proven design of ring roller.

Does anyone have a link to the George H Thompson design? I can't find anything.

 

 

George H Thomas:- The Model Engineers Workshop Manual.

Edited By Mark Rand on 25/06/2020 23:26:40

Thread: Liquid shim (or similar)
24/06/2020 23:02:43

Assuming we're talking about 0.3mm, then get a few sheets of plastic shim from cromwell.co.uk or mscdirect .co.uk.

You could get brass or steel shim stock to do the job, but the plastic works wuite well and is available in thin sheets.

Liquid shim concepts might appear to be good. but how do you tighten the parts down to them?

Thread: What Did You Do Today 2020
24/06/2020 22:50:00

SWMBO has ordered me to make a new garden gate after its predecessor lasted less than 25 years.

I'm ashamed to say that I spent some of today cutting tennons in allegedly 150x47mm C24 timber on the milling machine. Mortices will be cut when the 16mm long series cutter arrives from Ketan at Arc Eurotrate...

Thread: Artistic hand cut oilways
23/06/2020 22:50:06

We don't teach children and youfs to use chisels anymore. We should do!

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