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Member postings for Graham Stoppani

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

Thread: The story behind my forum image
03/06/2020 11:15:02

I had amnesia for a while following a motorcycle accident. My first recollection afterwards was being sat on the curbside in a large puddle of blood. Cautiously checking myself for injury I couldn't find anything amiss. I then realised it was the red TQF oil that had spilled out from a broken fork leg.

Later in the afternoon I was found wandering the streets in a daze pushing a broken motorcycle and taken in by a friend. While sat in her flat I was hallucinating watching a picture over her fireplace sliding from side to side across the wall. The next morning when I got home I was dragged of to A&E by my mum for X rays and such like.

It was only when I was contacted a few days later by the driver of the car I'd hit that I found out another vehicle was involved; the police and ambulance had been in attendance; and that I had refused to get in the ambulance or press charges against the driver that had pulled out on me.

Thread: Workshop Insulation Problem
08/05/2020 06:54:17

I can't comment on the structural side of things, but like Bazyle, I run a dehumidifier in my brick built double garage with an insulated flat(ish) roof. I have it set to 40% humidity and I'm collecting a couple of litres of water every two or three days to once a week depending on outside humidity.

I haven't seen any damp issues in the garage but I run the dehumidifier to help keep my motorcycles and metalworking equipment rust free rather than to deal with structural issues.

Thread: Arc's Website - Is it Just Me?
08/05/2020 05:45:07

Mine is fine too Chris

Graham

Thread: New member in Northants
02/05/2020 06:49:35

Welcome, fellow Northamptonian.

Thread: Cutting a slot in a turned piece
27/04/2020 15:42:52

I have to confess that it was the accountant in me talking. Slot Drill £7 slitting saw and arbour £21... nerd

27/04/2020 12:26:33

You might also be able to use a very small slot drill in your mill. Such as these sold by RDG Metric Slot Drills

Thread: Motorcycle General Discussion
26/04/2020 07:09:25

Nigel B,

I mostly work with BMW (that's why I took the bait on the GS smiley) but also Triumph and Ducatis now and then. I don't find pushing the big bikes around a problem as I'm a big lad and if you're doing it 8 hours a day your technique gets pretty good. When I was full time I was riding about 4,000 bikes a year. Now I'm retired I just help out running in bikes ready for the press fleets. I know, a tough job but someone's gotta do it!

Edited By Graham Stoppani on 26/04/2020 07:21:22

25/04/2020 11:29:37

A lot of talk about the weight of various bikes with the BMW R 1200 GS being described as grossly overweight. As sure as heck it is no light weight at 580lb curb weight. The RE 650 Enfield weighs in at 455lb making the BMW 27% heavier.

However, if you look at their power outputs the BMW knocks out 125bhp and the Enfield a more modest 47bhp. This gives the BMW a power to weight ratio of .21hp/lb twice that of the Enfield at .103hp/lb.

I'm not saying this makes the BMW the better bike, I'm just saying weight is just part of the story. I test ride bikes for a living and can have as much fun on an electric scooter as a 6 cylinder 1.6 litre bike (electric bikes are a hoot by the way).

Give me a bike, any bike, rather than a car any day!

Thread: Only for Myford lathes
20/04/2020 05:33:26
Posted by Kiwi Bloke on 19/04/2020 07:12:42:

Graham, EPDM rubber (if that's what you meant, but your fingers thought otherwise) is not compatible with hydrocarbons. Nitrile rubber is OK. So your bit left over lives for another day...

Thanks for the warning. I even checked the name of the rubber before typing and still got it wrong!

19/04/2020 06:29:09
Posted by Hopper on 19/04/2020 03:03:25:

A more common use for that steady bolt hole is to secure a metal strip to hold in place a vinyl or neoprene "bib" that stops swarf landing on the bed ways and working their way under the carriage ways and causing extra wear. Bit of vinyl about 4" wide does the trick rather well. IF the strip is made thick enough and the vinyl run up the back of it, it provides a barrier to swarf getting into the cross slide way right there too.

Just re-roofed my shed with EDPM rubber, had a bit left over and was wondering what to do with it. Thanks for the suggestion.

Thread: Scraping and Shimming Myford Headstock Bearings
18/04/2020 18:11:52

Having reassembled the lathe I now have less than a thou movement on the nose in all directions. However, I ended up not adjusting anything! All I can think is that the front bearing housing just needed tightening up a little rather than re-shimming or scraping. Still I'm not complaining as:

a) The shaft is now in spec for bearing play;

b) I got to learn more about my machine long the way.

Thanks Pete B for another interesting and useful article

18/04/2020 05:57:05

Just taken a look at Jan Sverre's videos. Hadn't come across him before. Thanks for the 'heads up'.

17/04/2020 12:51:01
Posted by Hopper on 17/04/2020 11:55:30:

It depends. If you have a small scraper and the skills, you could scrape the high spots down a little until you get a better reading across the full length of the bearing.

Don't tighten the bearing cap bolts down too much when doing this, it can squeeze all the blue out and create metal to metal contact that leaves no blue marks. And you only need to rotate the shaft about a quarter turn or so.

But the bearings do not look too badly chewed up so you may be able to simply remove about three thou from the shims and see how it goes as is. I might be tempted to try this first, seeing the smooth condition of the bearings -- at least from the photos anyhow.

Pete B

Thanks for the words of advice. I was very reluctant to start cutting away at metal, given that this is the first time I've played with white metal bearings. I do have a small scraper that I inherited but have never wielded it in anger before. I'll go and have another try this afternoon and let you know how I get on.

17/04/2020 10:52:59

Having read the above article I thought I'd check my bearings as described. The initial measurements taken at the nose showed pulling the chuck upwards gave a deflection of at least 3 thou while pulling down was less than a thou and backwards and forwards less than a thou as well.

Removing the bearing caps and the shaft for inspection showed the shaft to have very little wear. Likewise, although the bearing shells showed some wear marks they weren't in bad condition considering the age of the machine.

However, applying blue showed that the top of the front bearing was barely in contact with the shaft at all - that would explain the play only in the upwards direction. The blue had been applied with the shims removed and the bearings tightened until the shaft would not rotate and then slackened off until rotation was possible.

Here are a couple of pictures:

bearing caps.jpg

Here you can see the lack of contact.

bearing cap surfaces.jpg

This picture shows blue showing that the white metal bearings are touching, just, and not the bearing caps themselves when assembled without shims. It is also visible on the right side of the shell on the bottom of the picture that a recess has been milled along the edge of the shell. There is a corresponding milled edge on the other half of the bearing. (not by me)

Before I try to fix this, I'd thought I'd ask for your opinions of what to do and of any other things to test for. Thanks in advance.

Thread: Help with Maths ratio problem?
16/04/2020 06:33:17

(1) A method I haven't seen mentioned is linear programming (nothing to do with computers) where you find the answer with a bit of graph paper where the x axis equals one variable and the y axis represents the other. Take a look at Wikipedia for a more detailed explanation. Wikipedia

(2) If you want to work out the optimal ratios for more than two variables you would move onto the simplex method. Again, an explanation from Wikipedia here. Wikipedia

(3) For a few extra brownie points you can also use the SOLVER add-in in Excel. Its not part of the standard installation so you need to go to Files>Options>Add-ins to activate it. (The underlying method is simplex)

There you are guys, be careful of asking questions like this when there are ex-accountants lurking around. laugh

Thread: Now is a good time
21/03/2020 05:51:00

My biggest fear is that when I'm gone she sells it for what I said I bought it for... wink

Thread: QCTP dilema?
20/03/2020 06:00:53

Last year I replaced my Dickson type tool holder with a wedge type one from ARC Eurotrade. Very happy with the new tool holder. My reason for changing was the old tool holder had too much play in it that allowed the tools to deflect downwards slightly while cutting. The wedge design by its nature takes up any slack when you tighten it which the Dickson type does not.

Thread: Help identifying workshop contents
06/03/2020 08:25:18

Alison,

I live in Northamptonshire. If that is near you send me a PM and I'll help you identify what you have.

Graham S

Thread: Beginner's guide to tailstock alignment
03/03/2020 10:18:59
Posted by Bandersnatch on 03/03/2020 01:36:48:
Posted by old mart on 02/03/2020 20:28:55:

The second point is probably a typo. That is assuming the mic is digital, 0.001mm or 0.00005"

Or roughly the change in diameter of a one-inch bar for a 3-deg C temperature change.

wink

Yes, I was only aiming for an error of less than a thou' but got a reading of 0.000,05" just by luck.

As a matter of interest are my commas showing on other peoples computers as full stops?

02/03/2020 11:15:10

Having noticed a tapping hole I drilled for an M5 thread on my Myford ML7 was a bit oversize when I ran the tap down it, I remembered the tail stock alignment article by Pete Barker.

I followed Pete's instructions and cut a test bar between centres and measured the bar each each end. It took me seven goes but I finally recorded an error of 0.000,05" on my Kennedy micrometer which is the limit of its accuracy. Feeling well chuffed with myself, thank you Pete!

I probably could have got pretty close with fewer cuts if I had been more observant and noticed that one of my cuts was too shallow and did not cut the full length of the bar thus giving me a false reading. So not that smart after all...

Graham S

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