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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: 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.

**LINK**

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.

Thread: "Screwing" a car round a corner!
03/05/2019 19:51:34

Wasnt the Capri 1 same running gear as the Anglias. Capri 2 and 3 was the same as Escorts interchangeable.

CN36 185X60X13 standard tyres on a 79 German made Capri 2 S, not the best for stopping but decent, Yoko A008 awesome in all weather when they were UK road legal. Coarse spline prop and gearbox used to wave by by to the 3ltr Capris and had the edge on the 2.8 Colognes baby used to handle as well unlike any other.

Always wanted a genuine Escort Twin Cam could have got plenty around £400 in 1980 but wanted £400 3rd party. Did refuse a Cooper S in 82 it had seat runners welded further back £225.
Just think what both would be worth nowadays

27/04/2019 22:16:17

Common knowledge RWD with power on induces over steer controllably.

Common knowledge FWD with power on induces under steer and no control.

The thing about Mythbusters is wouldnt have been done in fairness. In general FWD for most is the quickest whilst theres grip, outside that forget it. Now theres a limit with RWD where you have to go way above any common road users skills and forcably get that back end out to see gains as much as 40% quicker than FWD. By that i dont mean drifting though it is controled.

Thread: Dialect expressions
26/04/2019 21:40:06

Small fry bought up as a Brummy, moved to Telford and got mixed Liverpudlian/Brummy lingo, then Walsall in the Black Country, then best of all an entirely different language in Sedgley where Gornal was only 1 mile away.
The Gornal language was still pure you would be talking quite normal to some one born and raised there then out the blue throw in "Hes as fat as a Tunkey pig" to "And they'l be putting the pig on the wall to watch the band go by" "I hate you" "I love you"

Thread: Harrison M300 Thread Dial Indicator (Imperial)
26/04/2019 21:25:25

Seen plenty on ebay from £10 upwards and no cheap plastic.

1993 would be a proper English build up Heckmondike, newer ones the last 20 years plus certain parts if not all are chinese. So go for a quality M300 Made in England.

Thread: Newcomer to inverters, please advise.
24/04/2019 18:29:06

Brian yes when he can be bothered to return your call, weeks later----.
4 inverters later still using it, shame about the others cost me £1600.

Chris nearly went that way Oct 2017 then looked at their exorbitant prices, so much so bought motor from Scotland, Mitsubishi from Gloucester region and pod with the extravagant £20 odd delivery and still saved £80 after paying £25 for a filter.
They do not and will not set the invertor up for use.

Thread: Z Axis-Support
22/04/2019 16:31:14

Good idea but i havent any room to do that on mine. Cables and Z axis dro in the way.
Its been 9 years since the transfer box broke on Super Lux and not paying £244 back then for the privilege minus motor.

Thread: Cheap DRO for Mill
22/04/2019 16:18:29

I wouldnt worry about having no instructions a 5 year old child can work it out.

This is one difference in cheap scales 0.145mm error on initial take up. Means carriage moves 0.145mm without the cheapy registering!

Thread: Milling Machine advise
22/04/2019 15:49:17

I wouldnt waste your dosh on the RF45's from the various sources theyre well over £2k now, limited in speed and more importantly made to a price in asia. So in argument to the Bridgeport i would sooner have a good old machine than a junk new one.
You wont like the price of the parts either in 2010 £244 for transfer gearbox (Super Lux) for the elevation whole machine cost £910 in 2004 now well over £2300.
More alarming the secondhand prices of these are that of brand new only a few years back. So use machine, wear it out which wont take a lot and sell for price bought for.
In all fairness its brought the prices of Bridgies up for good reason as any other quality product that is now no longer made.

I would go for a Bridgeport or Korean made clone.

Thread: Lathe controls position
20/04/2019 19:56:44
Posted by David Standing 1 on 17/04/2019 17:53:46:

My recently acquired Student has the start/stop/forward/reverse switch located on the saddle (the big red knob in the photo, stop in centre, up for reverse, down for forward)).

Very safe and very handy!

dsc_4630.jpg

Thats exactly the same as my 50 year old Harrison M300 apart from the slanted front tray and colour. Even has the carriage hand wheel the Harrison way. Theres also a lot of other asian build lathes with spindle start.
Earlier machines had clutches with lever top of head stock, much prefer that.

David, just the job in an emergency!
Or equally when starting up, just have to watch what happens rather than do something about it.
Most vfd conversion/disasters are similar

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