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Member postings for Jon

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

Thread: Sharpening Files
17/05/2020 19:29:18

We used to save dozens of 12" bastards up and someone would come round and do the elctrolytic job and bring back what was deemed salvagable about 35%.
Out that 35% might find 5% usable for literally one day. Used to go through a new 12" every 3 days average buying the best around at the time.
In all waste of time more so money at £1 each, if it was blunt with flats seen, things will only get worse with metal removal, it wont sharpen.

Thread: Internal Threading Inserts Puzzle??
17/05/2020 19:21:11

In hydraulics, have used 0.5mm pitch for internal and extternal threading Titanium cylinders 2.05mm wall thickness. By going even 0.75mm pitch that reduces strength over the thread and extra 0.25mm.

Just look upon it as a pitch, you can easily create your own, used to do a lot of M29.25 X 0.75mm pitch, o/d 33.04mm will hold 450BAR shear if o ring at the front so thread not exposed.

Thread: Chalking files
17/05/2020 19:12:30

Its the individual job case whether to use or not. Most of the times the job will respond better to no chalking just merely using the file differently or choosing another file or even a rasp.

Keep oils off files, biggest mistake you can make wont cut or not very well until burnt off.
Alumnium you can use coarse, medium cut to finishing, how are you supposed to get it to size removing a couple of thou.
Coarse 12" bastards we got through every 3 days, declogging often worked by using it on steels and changing direction. You wouldnt be able to pick aluminium out thats clogged and wedged in under heat, just a few strokes!

Thread: I Hate Brass!
29/03/2020 21:00:46

Time to worry is when yo want the job done, travels 4 foot to a wall, bounces back 3 foot and embeds in your arms.
Horrible stuff.

Thread: Coronavirus
28/03/2020 19:07:20

Problem is Ian they tell the truth the people will go in to even more panic mode, end result exactly the same there is no cure.

Thread: M-DRO Magnetic Tape / Linear Encoder 
27/03/2020 14:22:30

Thats the newer type Martin they are a lot taller and a lot thicker than the originals from 2009 when first came out.

Had to replace a read head last year that packed up, so went 1 micron this time, since then no more repeat errors.

Read head straight swap for old, covering not needed its sealed with o ring strip.

Older early type that first came out in 2009, only 7mm thick and shallower in height.

Thread: Deburring tool
27/03/2020 13:53:46

Got the genuine Noga its never used,total waste of time and space for deburing holes.

Continue using what i have always used the last 26 years - a knife!

Thread: scam alert
27/03/2020 13:48:44
Posted by Neil Wyatt on 25/03/2020 15:07:46:

I always put potentially dodgy numbers into Google (leave out any spaces). Here's a result for Michael's caller:

Used to do it until 2 years ago but pointless now since theyre all spoofed numbers. One aboves from India already have that blocked in BT from Jan.

These fraudsters buy 10, 20 or 30 etc numbers per month and will show up as legit UK numbers even mobile numbers, BT, TPS, ActionFraud cannot do a thing about it.

This is only Feb just gone, now due to coronavirus i have only had 3 Amazon Fraud calls this week, iNdia is on lockdown.

Thread: DRO magnetic encoders - generic?
23/10/2019 16:10:05

Bit late Adam i had two of the early magnetic 5 micron 10 years ago when just released. One packed up last week and went for a replacement 1 micron this time now reads 4 to 1.

From memory the C scales are or were Sino and had to be rewired for their readouts.

To be honest if size is no concern i would go with the Indian though very much larger like any glass scale, pointless. Tried twice calling technical at MDro fobbed off twice a best thats 5 days downtime.

Thread: Upside down reverse threading
14/05/2019 22:29:24

I know its impossible using a drill chuck to mill - taken about 15 years ago done about 600 patterned out to leave 0.8mm wall x 6.5mm thick with milling cutter in keyed chinese drill chuck. Drill holes to go on pcd.

How do you honestly think these can be done by hand as one offs and beat cnc in china on price. Again drill chuck done well in excess of 1900 in 26 years, no cutters drop or chuck dropping out, materials 18mm thick.

Must not do it again blah blah blah

14/05/2019 22:11:10
Posted by Circlip on 14/05/2019 12:13:00:


Whats the problem with that?

Is it because its not a drill or a D bit or any other kind. "

Try milling with it. Once you've seen one rattle and exit the chuck, you won't do it again.

Absolute garbage been doing and not diy for 28 years, not once has anything worked loose except using ER collets

13/05/2019 20:06:51
Posted by Circlip on 13/05/2019 12:00:05:

In a similar vein, left an American ME site after arguing with a colonial about NOT using a milling cutter in a drill chuck.

"I've been doing it for years" was the retort.

Whats the problem with that?

Is it because its not a drill or a D bit or any other kind.

13/05/2019 20:03:55
Posted by Alan .204 on 13/05/2019 00:07:21:

I do all my threading with an inverted tool away from the chuck, no need for thread relief either, I just go straight in

How are you plunging in to the metal with no relief?
Instant busted tip guaranteed every time not to mention aligning the start every time = impossible.

Most blind hole have no relief

Thread: Form Tool Sharpening
10/05/2019 20:48:45

Its a pain but got to be done, grind the relief if your very good can double it up for cutting edge.

Thread: Chinese Lathes
09/05/2019 13:24:47

Only ever had the one foreign/asian, a repair followed by two new US circuit boards still couldnt do a thing with it except power a small 1" flap wheel. Duly got rid of with grease still on it.

15 years on still got the British iron, difference is it lasts.

Thread: Double ended milling cutters
09/05/2019 13:03:48

There were some decent double ended around 20 years ago, nowadays wouldnt bother.

The flutes on all but the short ones will be too long for ER things, no problem with finger collets.
Quite true the Clarkson are a much better clamping system the cutter wont drop unlike ER. Still need both hands sometimes 3 hands unlike finger collets/R8 requiring one hand.

Thread: The Chocolate Fireguard as designed by Mercedes Benz
07/05/2019 22:58:44

Not to mention CO2 produced in the building of each electric cars battery is equivalent to driving a petrol powered car around for 8 years!

Quoted mileage from full charge is never anything like, knock off cold weather, wet and night use may see 1/3 drop the norm and thats about 5 months of the year.
Ok for those that can charge daily and do limited mileage.

Lastly take the exorbitant electric cars cost and knock off that cost in electric used to do mileage then factor in new battery every few years approx £5000.

Cmon take a business trip to south coast 200 mile each way. Petrol and diesel there in 3hrs non stop. Electric you wont make it needing at least half the capacity charge again just to get there, that trip is now well over 4 hrs and extra hours labour lost for each employee per journey.

All i can see is AA and RAC called out to boost charge vehicles stranded.

As is nothing adds up but can have fun in petrol and diesels still. Mines £120 tax and an hybrid turbo

Thread: "Screwing" a car round a corner!
06/05/2019 02:50:00

Tar Nick i used to buy and fit Escort stuff to my old Mark 3 Capri including double width anti roll bar bushes, Sachs strut inserts gas, track rods ends, track control arms etc. Rack was different and only trouble had was the spring rates and supposed free lengths to give ride height required.

From memory had to go 8" free length for RS Escort. should have given -1" ride height. It gained 2 1/4"

Gearbox, prop and axle was German coarse spline. English and the 5 sp were a lot finer.
Took it round the clock twice on two engines and just about everything else.

Thread: Anodising
06/05/2019 02:32:16

Used to use hydrochloric to clean aluminium with, proper Jekyl and Hyde. Anodising was in the workshop with sulphurics and hydrochloric etc. Never had rust in 4 years of doing it until 2006 when the large tank broke, gallons every where at 21%.

Thread: Larger VFD/Motors
06/05/2019 02:21:46
Posted by Pete Rimmer on 05/05/2019 23:13:04:

Your average 13a fuse can carry MUCH more than 13amps.


Previous lathe 1ph 1 1/2hp 240v used to blow 13A fuses 3 out of every 5 startups, no load fed from a 20A dedicated supply. Used to buy fuses by the hundred.
Likewise both 3hp compressors throw the 20A MCB.

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