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Member postings for Roderick Jenkins

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

Thread: What Did You Do Today 2021
06/05/2021 20:05:43
Posted by duncan webster on 06/05/2021 18:34:47:
Posted by duncan webster on 12/04/2021 18:14:19:img_20210506_110050.jpg

Neat yes

Rod

Thread: Workshop and Drilling holes with an ER collet chuck
02/05/2021 12:38:08

I always drill with the er25 chuck in the mill. Takes up less headroom than a drill chuck and changing the collet is less hassle than extracting a 2mt and drawbar. For really small holes I use one of arc's micro drill adaptors in a half inch collet.

Rod

Thread: Boll- Major 4.4cc Diesel
01/05/2021 20:55:17

Keith,

Another cracker.  I love the anodising yes

Rod

Edited By Roderick Jenkins on 01/05/2021 20:56:17

Thread: Eueka! - Has music been redefined?
27/04/2021 15:41:55
Posted by Phill Spowart on 27/04/2021 15:11:29:

Probably a dodgy algorithm, spotting some match undetectable to human ears. It'll be done automatically, probably by the record label. Welcome to the future...

My thoughts exactly. I "shazamed" my video but it failed to identify any music...

27/04/2021 14:54:31

This might amuse you. A German speed metal band called "Rage" has claimed that the soundtrack on my YouTube video showing the action of a Eureka form relieving device has infringed their musical copyright. Apparently the "music" to be heard between 1:16 and 2.18 minutes was composed by them. What do you think?

After I challenged their claim they still maintain that their copyright has been infringed !

Rod

Rats, typo in the title angry

Edited By Roderick Jenkins on 27/04/2021 15:00:20

Thread: Bygone Trader Catalogues
27/04/2021 10:58:54
Posted by ega on 27/04/2021 09:53:29:

May I offer this from a 1939 Tom Senior catalogue (Liversedge not Liverpool)?

As they say, make sure you are sitting down before checking the price!

I remember my mum telling me that when she worked in the office of the local electricity company in Brighton just befor the war that the sevice engineers where paid £2 a week. So, one weeks salary for a working man to buy the castings and half a crown left over for beer at tuppence a pint.

Rod

Thread: Snapping taps
21/04/2021 15:32:47

One advantage of carbon steel taps over HSS is that they it can be softened by heating up the whole thing to say 400C (hotter than "blue" but not as hot as "cherry red" . The offending tap can then be drilled out.

Having said that, I have great confidence in spiral flute taps which I now use confidently down to M2. The evacuation of the swarf makes them much less likely to sieze

Rod

Edited By Roderick Jenkins on 21/04/2021 15:33:19

Thread: Solder for steam pipes
20/04/2021 14:19:46

Try a search for Comsol. Most of the Model Engineering suppliers in the UK stock it as well as CuP alloys who stock their own version in both cored and solid.

HTH,

Rod

Thread: Simple test to distinguish mild steel rod from silver steel rod.
16/04/2021 11:45:50

The spark test does work - best tested by comparing with 2 known specimens. Measurement is pretty good as well since most mild steel bars are a couple of thou under the nominal diameter whereas silver steel is usually less than half a thou under.

HTH,

Rod

Thread: What Did You Do Today 2021
12/04/2021 19:00:14

Duncan,

Very nice. I shall look forward seeing the results of your flagstone fabrication. When I finish my Farm Boy, the next project will be the Sanderson Beam engine - it's going to need a floor.

I've spent the last couple of afternoons making this Instrument Vice. The base casting is a CES product that has been hanging around (like the Level I recently made) for decades

instrument vice.jpg

There were a couple of hairy set ups but no excitement ensued

instrument vice b.jpg

instrument vice a.jpg

Stay well,

Rod

Thread: Chinese junk
31/03/2021 18:21:41

Hi Martin,

I had to go searching, it's the Chinese chuck thread.

**LINK**

Stay well,

Rod

Thread: Ian Bradley's Drill grinding jig
31/03/2021 12:36:05
Posted by Ady1 on 31/03/2021 09:17:27:

Seventy years since that article came out

But only 26 years since Mr Bradley's demise. However, it was good of you to go to the trouble and I'm sure no one will mind smiley

Stay well,

Rod

Thread: Small Poppet Valves
26/03/2021 11:54:08

Stew Hart has a youtube video of a traveling steady for small diameters that might suite

**LINK**

Rod

Thread: Work Shop Talk - Cleaning Sanding Belts & Sanding Discs Easily
25/03/2021 11:16:43

I've got one of the Axminster ones which I bought for use on my drum sander. I believe it is made from raw (un-vulcanised) rubber.

Rod

Thread: Anyone done any Nickel or Chrome plating of mild steel parts at home?
25/03/2021 11:07:37

I've used this nickel acetate method with success. I do however use a laboratory type variable DC power supply (only because I've got one)

Geoffrey Croker YouTube video

Rod

Thread: How many gliders have engines?
24/03/2021 12:44:59

Quite a lot

Motor Glider - Wikipedia

Thread: Computer Update
23/03/2021 12:14:28

Peter,

Have you considered contacting your local (Inverness?) computer repair/shop? I am sure they can put something together to your specification for a competitive price, tailored to your specific needs.

HTH,

Rod

Thread: Stuart victoria
23/03/2021 11:47:56

Sweet smiley

Rod

Thread: Noga Rotodrive
22/03/2021 22:46:31

Just got one of these:

Draper 37023

Works very well. Cheapest version was on Amazon. Prices ranged up to nearly 40 quid on ebay.

Cheers,

Rod

Thread: What Did You Do Today 2021
18/03/2021 17:32:04

The recent discussion about vernier height gauges prompted a thought. The problem I have with my vernier gauge is that a) It can't be zeroed and b) more importantly it's really hard on the knees since I have to squat down to read the scale through the bottom part of my varifocals. It occurred to me that I have a caliper type scale left from my budget milling machine scales. This is what I made:

hg1.jpg

hg2.jpg

Not particularly elegant - made from the oddments box. I checked it against my workshop gauge blocks and there appeared to be a slight systematic error checking up to 4" height. I then had the thought to check the verticality of the scale against a square and after a tonk with a hammer it reads 4.000" and 0.500" against the appropriate gauge blocks. I am very pleasantly surprised and it's definitely good enough for marking out and it cost me nothing. Although the scale is hardened stainless the body is not since I had no problem drilling and tapping for the thumb locking screw.

Cheers,

Rod

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