By continuing to use this site, you agree to our use of cookies. Find out more

Member postings for Peter Jones 20

Here is a list of all the postings Peter Jones 20 has made in our forums. Click on a thread name to jump to the thread.

Thread: Angel Eyes.
04/02/2021 20:25:30

Years ago I got hold of some BMW 'angel eyes' which were 'pre' LED and needed a driver to light them up. They woe really bright compared to LED's at the time.

Battery charger power supplies always run above stated voltages but drop closer to stated voltage when connected to their original battery with 'correct' internal resistance. The exception will be chargers for lead acid batteries which will always run closer to 14v

Thread: Setting up mill
04/02/2021 19:59:38

Check the column to base bolts are torqued properly.

It's possible to adjust tram on a 'non adjustable' mill by changing torque values (if that doesn't work you may also have to shim different quadrants of base)

I got my mill drill with an 'inspection chart' that was pretty worthless but eventually got it near perfect by thinking about which bolts to tighten and loosen. The various sections of cast iron will distort tiny amounts but can be set pretty accurate (less than0.01mm over 8" swing)

Sorry to be swapping imperial / metric but I was brought up on imperial measurments and trained as metric was being introduced so have little trouble switching between the two(I'm sure there are plenty of us 'old duffer's' who do the same?)

Just noticed the post directly above mentions the samwe thing about column  bolts but didn't see it while I was typing (and running around doing 'other stuff)

Edited By Peter Jones 20 on 04/02/2021 20:05:45

Thread: Milling cutters choice
04/02/2021 19:25:35

For aluminium I've found un-coated solid carbide are best.

The only problem I've come across is I can't run them fast enough in small diameters.

I did adapt a 'trim router' to fit lathe tool post but it's fixed speed (27,000rpm) worked OK even on 1/2" thick steel (A36, structural steel, don't know UK equivalent, probably EN8 or similar?)

Cutter was 2.5mm dia and 'mostly OK' (not overheated or chipped) after about 35" of cutting.

It was actually easiest 'trepanning' I've ever done

Thread: Reversing Motor
04/02/2021 19:07:27

I had the same problem with lathe motor.

The original motor had two capacitors, both 'starting caps' one for forward one for reverse.

The motor I replaced it with only has single cap so needs a different reversing switch with an extra set of contacts.

You have to reverse the field windings to get motor to start in the opposite direction

At present, I haven't changed switch so only have forward rotation as it isn't possible to bridge various contacts in multi switch to obtain reverse

Thread: BA threads
04/02/2021 18:49:10
Posted by Howard Lewis on 04/02/2021 15:52:06:

It may be a mistake to become too fixed on hexagon size vs fastener size, although logical sequence does have advantages.

Sometimes hexagons differ from what we take to be the "norm" . On some Renaults, the M8 nuts on the studs securing the carburetor were 12 mm A/F because of space considerations (Presumably forced by Solex )

Don't forget that during WW2 to conserve material, BSW and BSF head sizes were reduced , (So 5/16 BSW / 3/8 BSF became 1/4 BSW /5/16 BSF size ) ditto BA hexagons were available "next size down", presumably for the same reason, and to aid a scale appearance.

Sometimes differences are driven by practical considerations, where the manufacturer realised that not everyone might have two spanners of the same size. This resulted in the locknut not being the same size as the adjuster, so the adjuster might be M8 with a 13 mm hexagon, but a 10 or 11 mm A/Ff locknut enabling adjustment and locking with two different sized spanners that would be readily available.

Sometimes a manufacturer changed thread standards when introducing a new model. The Leyland Tiger Cub was to manufactured BSW / BSF standards. The brake slack adjusters were identical, apart from the hexagon of the adjuster, to those fitted to the successor Leyland Leopard, which was to Unified thread standards.. Since the slack adjusters were physically interchangeable, it was not uncommon for a fitter to need a 3/4 A/F spanner on one side and a Whitworth spanner on the other. This was far better than having an expensive vehicle off the road for 24 hours awaiting a "genuine" replacement..


I always thought they were Continental and Japanese industry standards. Continental (French/German) 8mm bolts have 13mm head and JIS have 12mm head

It's been 'common knowledge' in the motorcycle industry since the ISO standard was changed in 1965 (ish) Now, all metric threads will interchange even if bolt head size is different. Anyone who has restored a pre-1965 'import' (generally Japanese or German) knows there are differences in thread design

04/02/2021 18:42:09
Posted by peak4 on 31/01/2021 20:02:59:

Here you go folks, some interesting reading for your next tea break; link to part 2 at the foot of the page

From the 2nd page section 9
"For, as has recently been pointed out by Mr. Bosanquet,5 it is easy to cut a thread, whose pitch differs from one millimetre by an amount which may for all ordinary purposes be neglected (1/155300th), with a guide-screw based on the inch by the addition of a wheel of 127 teeth"

Now of course we can cut an exact 1mm pitch thread with a 127 tooth gear since the inch is defined as 25.4mm
There's an interesting article HERE on the varying definition of the the "Inch" with the passage of time. (I have posted that one before, but it's still worth a read.)


Edited By peak4 on 31/01/2021 20:04:12

Thanks Bill, it cleared up some questions I had from when I tried researching metric system in early 2000~2002 as I was teaching a 'machine shop' course at Motorcycle Mechanics Institute.

At least it justified my statements to students that they had been using metric system and metric measurements since the 1860's (plus, of course, they only use 'metric' money)

You would not believe the 'arguments' from people saying they 'don't understand metric'

I always asked if they ever went shopping and needed to take someone with them to figure out how to pay

Thread: Loctite made in China?
03/02/2021 22:33:28

Generally, the problem isn't 'Made in China' but quality control by managers. (line workers have no say in what they are assembling)

Personally, I wouldn't be able to continue my hobby if it wasn't for 'Made in China'

The labor costs are incredibly low there compared to any industrialised country (same in India although materials can be inferior to Chinese stuff sometimes)

I would like to be able to purchase better quality materials and machines, but, unless your going 'full industrial' most modern stuff is pretty lightweight and cheaply made compared to 1970's and earlier machinery but still has a premium price out of my range.

Thread: Adhesive for foam insulation
03/02/2021 22:20:55

As with everything nowadays, there is far more to learn than you ever wanted .

Interesting topic though.

I'm going to use paintable expanding foam in a can to cut down the rattling from belt cover on mill/drill

Thread: Jacobs Chuck
03/02/2021 22:11:49
Posted by Nigel Graham 2 on 03/02/2021 22:01:14:

I don't know if they are still available but it was possible to obtain replacement jaw and nuts sets for Jacobs chucks. .(Maybe similar for other makes?).

If not made now, unused sets might occasionally pop up among the second-hand tool dealers.

I'm glad you mentioned thar, I think I may actually have a set but had completely forgotten about them.

Now all I have to do is remember where I put them ~20+ years ago. Probably still hanging on a nail in garage (only problem with that, garage in Wales, I'm in Florida)

I won't ask my brother to look though, he'll probably sell them

Thread: M2 x 2mm brass grub screws - do they exist?
03/02/2021 22:06:46
Posted by Paul Lousick on 30/01/2021 22:13:24:

Hi Chris, Ya gotta be quick on this site wink


LOL, I thought I would check before posting the same answer.

I made one in steel a few weeks ago to make some primary main jets for a 1974 Honda (7x0.75mm)

Thread: Bronze balls in place of steel balls in a Land Rover
03/02/2021 19:35:46

For the OP I would say use oversize hardened balls and a full synthetic high pressure lubricant.

For everyone else, insurance is probably the biggest legalisedf theft there is.

I obtained a Florida insurance licence,

There are a lot of con-men in insurance industry, the ''manager ' who convinced me was one of them. It's a totally disgusting immoral industr yfull of very hypocritical greedy people some who actually believe they are 'doing you a favour'

I refused to sell the overpriced products and was literally marched out the door..

Since then I've been approached by numerous companies, many even more unethical although still staying within the boundaries of 'legal'.

I'm fully aware there is insurance fraud, but, majority of people really are pretty honest and insurance companies spend far more on lawyers fighting cases to avoid paying money to genuine claims with lawmakers supporting them. Just take a look at insurance company reserves and profits, most are in the several billion range. That was not what insurance was meant to be.

I did some research many years ago,

Richard Price from South Wales (Llangeinor actually) was a vicar who 'invented' actuary tables (risk of loss) He was also a friend of Benjamin Franklin and an 'honorary' American)

The State licence exam pass rate is less than 20% so it shows the caliber of people involved 'over here' (only 17% passed first time in my group, yes, I was one of them who passed)

Guess that's enough of a rant, almost 6 years on I'm still disgusted by the things I found out.

Thread: Jacobs Chuck
03/02/2021 17:48:46

I've got a couple of Jacobs chucks that are a bit 'sticky' in places so I think I'll have a go at fixing them. It won't be a big loss to me if they are scrap as I got most of them 'free' when buying other stuff (the box of junk that often goes with used machinery)

Thread: 1-2-3 Block Clamping
03/02/2021 17:35:39

Even though I'm in the USA I also find it annoying as I've mainly worked on Japanese motorcycles since I started 'playing' with bikes in 1968.

'Everything' I have is metric but at least UNC is easily available over here. I usually end up 'converting' to metric threads as it's a real pain having multiple sets of tools to work on stuff. I have very few 'imperial' taps and dies but all sorts of odd size metric (7x0.5, etc)

Thread: Micro rivets
03/02/2021 17:25:11

For such a beautifully made model it would be a great shame to bodge it.

When I was training (1975~) I had to make 100+ rivets for instructor from 1/8" stainless steel welding rod.

Heads were 1/16", I forget shank size but remember they were 3/8" total length. I think I lost almost as many in the swarf tray as I made. (his hobby was clock making and obviously he didn't want to make all the rivets, having a bunch of students able to do it for him)

I wasn't bothered though as it did get me a good grade for 'projects completed'. (or something?)

The right thing to do would be dismantle sections and re-build them with new rivets.

Copper isn't the best idea as it has a galvanic interaction with aluminium (stainless steel has similar reaction with aluminium)

Personally, I would make a bunch of rivets from 6061 then modify a 'Mole' grips to set them (get a cheap copy, remove jaws and grind flat, ball end mill for head and set shank) Just squeezing rivets would make re-assembly pretty quick ,particularly if you 'glue' parts and sub assemblies together first

Thread: 1-2-3 Block Clamping
03/02/2021 17:05:50

I've got several sets of 1x2x3 blocks of various qualities, some 'perfect' exact size and others a little undersize after being ground square. It's a neat idea which I had forgotten about as I don't use them very often.

video was too long but was for 'beginners' so I guess he had to explain why he was doing things?

I would have made some double diameter studs as well for the times you want blocks locked together in a larger size (oh, I already did wink)

Various length studs are easy to make from ordinary bolts, cut the head, off turn shank to diameter and thread it. (heads are usually forged so much tougher than shanks)

Thread: Die query?
03/02/2021 16:12:19

All the information was available in the free 'handbook' pages published in the 90's in MEW.

I still have mine and reference it more frequently than I probably should to make comments on You Tube nerd

Thread: Motorcycle General Discussion
03/02/2021 16:03:32
Posted by Phil P on 02/02/2021 16:29:41:

I remember many years ago probably in the early 80's at a Post Hill trial, the main section was up the hill and back down through the trees.

I was on my BSA B40 at the time and coming back down through some undergrowth my gear lever caught on something and snicked it into neutral. I never knew that bike could accelerate as fast as that !!

All I remember was seeing the fast flowing beck at the bottom approaching at great speed and wondering how I was going to get out of it...........Then my helmet peak hooked itself over a low hanging branch and yanked me off the back of the bike, which luckily veered off and fell over just before it went into the water.

I thought I had got away with it until I heard the cheer and round of applause from about 20 on-lookers.

Happy days smiley

I had a similar experience in the 80's when I was doing Enduro's.

Andre Zembruski and Geraint Jones (World Enduro champion at the time) set up a course somewhere in mid Wales with a 'rather steep' downhill. They put a checkpoint at the top so people would heve to stop and be warned.

I was riding same minute as my buddy Chris. (he won 250 Clubman championship 1980 or 81?) He went first, stopped and looked down then rolled over the edge. I thought 'pussy' and hit it as about 20mph in second gear. He says I passed him about 8ft in the air, upside down. I only remember 'fish tailing a couple of hundred yards bouncing from one sheep track to the next then seeing a cut down tree about 6ft diameter in front of me.

When I woke up, a kid was standing over me , first thing he said was 'why did you crash, we thought you were going to make it' Apparently I did make it almost all the way down but paniced when I saw tree, got sideways and high sided.

Bike was pretty bent up, the chromoly bars had finally bent (been on about 6 bikes previously) front wheel was hitting forks both sides and I was hurting like hell.

Bike started OK so I got instructions how to get back to start. Trying to wheelie over a bank, I found I had a bunch of broken ribs and almost crashed with the pain.

Found out later I caused a major panic, 4 ambulances were out looking for me, course marshals couldn't find me, they thought I was dead in a ditch somewhere but I was already packed up and on my way home (luckily girlfriend at the time was driving, she and a couple of other people loaded biker into van, no way I could do it) It was my worst crash ever but didn't put me off, later I got a 490 Maico (that tried to kill me many times)

03/02/2021 15:41:25
Posted by gary on 02/02/2021 06:34:11:

this is an piece from an old motorcycle book explaining how to climb a frightful hill. a little commonsense and observation will enable many a frightful hill to be climbed by an engine in bad health. such abnormal hills generally owe there difficulty to one or two steep short pitches. when the engine begins to labour, jump off and run alongside for a few yards till the engine picks up freely again. keep a keen lookout from the tail of you eye for any by-roads coming down on to the hill at an angle, up which you may proceed to get a fresh start in emergencies. at worst if you have to push, pile all superfluous clothing on carrier before commencing to shove. it aso tells you how to remove the drive belt to aid pushing, obviously no clutch. the good old days?

That sounds like advice from the 1900's~1920's for normal highwayas it mentions roads coming in at an angle? (rather thasn tracks you would find off road)

Thread: Shipping delays and costs
21/01/2021 21:44:32

I think Covid has also had a lot to do with shipping delays for anything that can't be sorted by robots. Even internal mailing systems are about 4~5 times longer than was normal 2 years ago.

I ordered some parts from Germany, contacted seller after a few weeks and was told things are taking 2~3 weeks inside the country where it used to be 2~3 days.

I've had parcels held up in local distribution centre for 12~20 days (and that's only about 4 miles away)

Side effects from Covid are wider ranging than most people realise.

Bulk shipping is still cheapest way to move large quantities of 'stuff' long distances,.

Diesel ship engines are the most fuel efficient in the world (above 38% compared to about 30% for normal petrol and a little over 10% for external combustion (steam engines)

Edited By Peter Jones 20 on 21/01/2021 21:48:17

Thread: Motorcycle General Discussion
21/01/2021 21:24:42

Thanks for the link,

I had no idea this stuff was available online

That is something I've only ever seen on a Villiers engine race bike probably 50 years ago? Wasn't 'mine and never got into it.

My father would have known but he's been gone since 2004.

Edited By Peter Jones 20 on 21/01/2021 21:25:34

Magazine Locator

Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!

Find Model Engineer & Model Engineers' Workshop

Support Our Partners
JD Metals
Eccentric July 5 2018
Eccentric Engineering
Subscription Offer

Latest "For Sale" Ads
Latest "Wanted" Ads
Get In Touch!

Do you want to contact the Model Engineer and Model Engineers' Workshop team?

You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.

Click THIS LINK for full contact details.

For subscription issues please see THIS LINK.

Digital Back Issues

Social Media online

'Like' us on Facebook
Follow us on Facebook

Follow us on Twitter
 Twitter Logo

Pin us on Pinterest