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Anyone with a lathe?
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mikef
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May 21, 2020 - 10:32 am
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I have now received the aluminium bar and will start today I hope.
I noticed that Jess Steel said that the step on his spacer was close to 0.75mm and Stoo says his is 0.5mm. I was thinking of making the step 0.6mm, somewhere in between. Do you think that's OK? I will keep the total thickness of the spacer at 6mm.
Mike.

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Stoo63
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May 21, 2020 - 10:50 am
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I think that 0.6 should be fine, Mike. Thanks so much for taking this on. As you say, good practice, and, f they work and are easy to make then we could have resolved an "unobtainium" which would be great 🙂

Enjoy your day at the lathe,

Stewart

'52 D1 direct lighting plunger; '58 Square Four (project); '55 D3 Battery; '59 D1 direct lighting plunger;  '59 Tiger Cub; '60 5TA;  '76 FS1-E '97 Honda Sky SGX50.

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mikef
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May 21, 2020 - 2:36 pm
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It's done, just need a "test pilot". Are you feeling brave Stewart.
If you PM me your address I'll send it.
Mike.

spacer.jpg

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May 21, 2020 - 2:42 pm
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Bet it fits just like an original part 😉

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Stoo63
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May 21, 2020 - 4:47 pm
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Mike you are a genius!! PM sent 🙂

'52 D1 direct lighting plunger; '58 Square Four (project); '55 D3 Battery; '59 D1 direct lighting plunger;  '59 Tiger Cub; '60 5TA;  '76 FS1-E '97 Honda Sky SGX50.

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sunny
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May 21, 2020 - 5:12 pm
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i  dont   need  one  but its   grate  Mike       well  done  

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bantammad
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May 21, 2020 - 6:49 pm
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Hi bantammad ere just the ticket Mike now you’re complete committed if you send me your dimensions etc I will also make a couple more on my lathe if I can get some material to do the job from the shed Les 🔧have a nice day 

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mikef
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May 21, 2020 - 9:44 pm
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Hi Les.
         I have attached some notes that I made below. I must admit I haven't checked it thoroughly so could contain a mistake or two but may help in conjunction with the thread so far. Hope you can make some sense of my "fag packet" drawing.
I will post off the test piece that I have made to Stewart tomorrow, he has kindly volunteered to try it. Hopefully we will know soon if it will work.
I obtained the aluminium bar from "metals4u". They are extremely efficient in delivery of metal. Two days from order, it arrived.
Spacer-notes.jpg

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bantammad
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May 21, 2020 - 10:08 pm
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Hi bantammad ere fag packet or not it’ll do for me regardless Les 

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cocorico
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May 22, 2020 - 7:19 am
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Your unspecified ** measurement is the same as the outer diameter of the inner bearing race, as I recall. I doubt a mm either way makes any odds. I inagine it is to allow 'breathing space'  for petroil to circulate in the bearing.

In effect, when shimming-up for the endfloat, you will be measuring between inner race of bearing>spacer>shim(s)>crank/flywheel face.

1956 D3 running, lights to sort. 7 other bikes in the Barn. 1950 D1 engine now running.

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bantammad
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May 22, 2020 - 9:58 am
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Hi bantammad ere just sent off for a length of 50mm diameter alloy bar to make a couple of distances pieces get it next week .now to sauce some steel plate for crankshaft plates from the shed Les 

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mikef
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May 22, 2020 - 10:38 am
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Hi Les.
      I made a pair of crankshaft plates for a D1 some time ago. If I remember correctly I did a search for steel discs on e-bay. The nearest size I could get were 150mm X 1mm. I drilled the centre hole first then fitted the plates to a mandrill and turned down the plates to the correct diameter. 1mm thickness was the thinnest plates that I could find, just a bit thicker than the standard BSA ones but they worked OK.
Mike.

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bantammad
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May 22, 2020 - 11:07 am
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Hi bantammad ere thanks Mike for the lead on your experience having made some plates before,that’s the way l am thinking how ever I am not a tool room engineer my limited lathe turning Skills, has been Gained as a Time served mechanic,inspector , for over sixty years got to keep that between the ears moving having fun Les 

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cocorico
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May 22, 2020 - 6:47 pm
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** Please log in to view ** Look at Post 13.

1956 D3 running, lights to sort. 7 other bikes in the Barn. 1950 D1 engine now running.

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mikef
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May 22, 2020 - 7:35 pm
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Oh yes, that brings to light another anomaly, two styles of flywheel plates. Some with a recess in the centre and some without, depending on the the flywheel type, I imagine. Meaning that if you removed the recessed plate you will have to add a spacer to make up the thickness.
Very interesting, all of the phases that the development went through, Some had oil flingers, some had spacers, different flywheel plates.
No wonder we struggle to make sense of it all 60 years on.
Mike.

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bantammad
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May 22, 2020 - 7:41 pm
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Hi bantammad ere keep laughing 😆 it’ll all come good if not just 💤 on it All the best Les 

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cocorico
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May 23, 2020 - 4:53 pm
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mikef said
...two styles of flywheel plates. Some with a recess in the centre and some without...

I imagine there may be a 'type' for each model? I've only seen those in my D1 and D3. The D3's doesn't affect end float shims as it's cut our  to clear them, the D1's does, as it's 'domed' to fit over the crank / flywheel join. It's an easy compensation (when you realise it embarassed), just an extra 1mm shim either side of the crank. Can't comment on the D5 upwards.

1956 D3 running, lights to sort. 7 other bikes in the Barn. 1950 D1 engine now running.

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bantammad
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May 23, 2020 - 6:17 pm
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Hi bantammad ere the D5 type of plates are flat so the relief in some don’t make sense because the stepped diameter that the plate fits over is closest to the fly wheel then you have  next seal diameter followed by the bearings diameter On the shaft? The 2 inch diameter would seam to be a close diameter of the seal.just to mention a point of interest some seals that have been fitted are in fact to wide l know I’ve been sold some they rub on the fly wheel plates so watch out for that one hope that helps you from the shed Les 

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Stoo63
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May 26, 2020 - 12:40 pm
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Catastrophe!! Firstly thanks, Mike for making and sending. Cases are waiting eagerly to receive your prototype. BUT...... below is Hermes best effort at delivering..... Double plus ungood!

mail-3.jpg

Aghast from Glasgow 🙁

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'52 D1 direct lighting plunger; '58 Square Four (project); '55 D3 Battery; '59 D1 direct lighting plunger;  '59 Tiger Cub; '60 5TA;  '76 FS1-E '97 Honda Sky SGX50.

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mikef
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May 26, 2020 - 12:45 pm
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Oh dear, I'll use Royal Mail next time. I'm on the case. Hermes have been pretty good for me until now.

Sorry about that.
                Mike.

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