Author Topic: Mercedes-Benz W165 Grand Prix engine in 1:3 scale  (Read 79437 times)

Offline Admiral_dk

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Re: Mercedes-Benz W165 Grand Prix engine in 1:3 scale
« Reply #435 on: July 21, 2021, 11:43:52 AM »
We have a Danish saying that goes something like this :

Quote
You should not throw stones, when you live in a Glasshouse.

So I stopped throwing (Verbal) stones loooong time ago  :old:

I think I just would have used the 'Copy & Paste' function - partly lazyness and partly because I was born dyslexic

Offline Vixen

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Re: Mercedes-Benz W165 Grand Prix engine in 1:3 scale
« Reply #436 on: July 21, 2021, 12:29:52 PM »
Thanks for the advice Per.

However, 'Copy and Paste' is not such an easy option when you have two computers, each with a different operating systems (Linux and Windows), located in two separate buildings, with no network connection in between.

Mike
« Last Edit: July 21, 2021, 01:03:47 PM by Vixen »
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Offline Vixen

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Re: Mercedes-Benz W165 Grand Prix engine in 1:3 scale
« Reply #437 on: July 21, 2021, 12:55:17 PM »
I thought you would like to see the finished idler gears. Six plus a spare.






While the gear teeth were being cut I applied a water based coolant/ lube to the involute cutter with a paintbrush. After cutting nearly 350 teeth, a large stalagmite had formed on the lathe bed. This upward-growing mound of chip deposits had precipitated from the coolant dripping from the bottom of the gear wheel.

What a mess  :censored: I will make a metal bed cover to make cleaning up easier before the next gear cutting session.






Here the stepped bore gauge is being used to check the bearing fit.




The meshing of a pair of gears being checked on one of the Bridges. Nice fit, no interference and no measurable back-lash.




The next job is to make up and fit the stub axles to all the Bridges.

Mike

« Last Edit: July 21, 2021, 01:44:18 PM by Vixen »
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Offline kvom

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Re: Mercedes-Benz W165 Grand Prix engine in 1:3 scale
« Reply #438 on: July 21, 2021, 01:32:21 PM »
By spring pass I mean just moving the cutter back through the cut without a retract.  I'll wager most people doing manual gear cutting do this.

Offline Vixen

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Re: Mercedes-Benz W165 Grand Prix engine in 1:3 scale
« Reply #439 on: July 21, 2021, 01:40:50 PM »
Thanks kvom, now I understand what you had in mind. Yes, that would work.

The programmed retraction of the cutter does ensure the cutter is clear of the gear blank when the A axis is incremented. As with most machining tasks, there are usually several equally good ways to achieve the required result.

Mike
« Last Edit: July 21, 2021, 01:52:42 PM by Vixen »
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Online Kim

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Re: Mercedes-Benz W165 Grand Prix engine in 1:3 scale
« Reply #440 on: July 21, 2021, 06:18:52 PM »
Those are beautiful gears, Mike!

And the stalagmite is pretty neat too.  Just think what it could grow into in a few million years!

Kim

Offline Vixen

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Re: Mercedes-Benz W165 Grand Prix engine in 1:3 scale
« Reply #441 on: July 23, 2021, 06:31:54 PM »
Thank you Kim, The stalagmite grew a lot taller on a couple of occasions but fell over each time, before I could find the camera.

I managed to get some more (hot) workshop time today. So I set about making the stub axles for the cam drive idler gears.

The stub axles were a straightforward grooving and turning to length job. I like a straightforward job once in a while.

Here you can see all the idler gear components after cleaning, de-greasing and awaiting assembly.





A pair of ball races were pressed into each idler wheel with a smear of Loctite to bond them in place. The E clips were fitted to the stub axles which were then pressed into the idler gear bearings. The Stub axles are bonded into the Bridges with Loctite 648 high strength retainer. I wanted a small clearance to give a minimum amount of float to the bearings, so I slipped two typing paper spacers (total thickness 0.007") onto the axle shafts before they were bonded into the Bridge. I will give a couple of hours (overnight) for the Loctite to fully cure before pulling out the paper spacers. I may have to soften the paper spacers with a little water, we will see.





The gears mesh perfectly, no binding or any measurable back lash. Things are looking promising.






Here are the two bridges roughly in position on the back of the engine . It looks like this redesign may just work. But first, I need to make and fit the magneto drive gear at the top centre and a output gear for the crankshaft, before the final gear meshing and positions can be confirmed.




One more job done and out of the way, many more to follow

Mike
« Last Edit: July 23, 2021, 07:45:30 PM by Vixen »
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Online crueby

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Re: Mercedes-Benz W165 Grand Prix engine in 1:3 scale
« Reply #442 on: July 23, 2021, 06:54:40 PM »
Stunning gears, wow.   :popcorn:

Offline cnr6400

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Re: Mercedes-Benz W165 Grand Prix engine in 1:3 scale
« Reply #443 on: July 23, 2021, 08:20:21 PM »
Zahnradfabriken von Mike has been busy! :ThumbsUp: :ThumbsUp: :ThumbsUp: :popcorn: :popcorn: :popcorn:

Offline Vixen

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Re: Mercedes-Benz W165 Grand Prix engine in 1:3 scale
« Reply #444 on: July 23, 2021, 08:37:52 PM »
Ja, das Zahnradfabriken von Mike habe ▄berstunden gemacht   :lolb: :lolb:

Mike
It is the journey that matters, not the destination

Offline RReid

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Re: Mercedes-Benz W165 Grand Prix engine in 1:3 scale
« Reply #445 on: July 23, 2021, 08:47:20 PM »
Holy Wow Batman!! That looks fantastic! :ThumbsUp:
Regards,
Ron

Offline Admiral_dk

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Re: Mercedes-Benz W165 Grand Prix engine in 1:3 scale
« Reply #446 on: July 23, 2021, 09:17:21 PM »
You're getting close to making (engine-) Porn again Mike  :praise2:

Oh - and I'm very familiar with the problem of having to "Copy Paste" between two different computers - even with the same OS, it's a pain  :facepalm:
The reason I didn't think of this in your case - has to do with my own - I do all CAD/CAM, Coding, WWW, etc. on the same PC - the others are in different workshops + one connected to the CNC @ Work ....

Offline Art K

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Re: Mercedes-Benz W165 Grand Prix engine in 1:3 scale
« Reply #447 on: July 24, 2021, 02:56:51 PM »
Mike,
Impressive work on the idler gears!
Art
"The beautiful thing about learning is that no one can take it away from you" B.B. King

Offline Jo

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Re: Mercedes-Benz W165 Grand Prix engine in 1:3 scale
« Reply #448 on: July 25, 2021, 09:59:03 AM »
You're getting close to making (engine-) Porn again Mike  :praise2:

I understand what you are getting at Per but without the bit in the brackets the phrase "Making Porn" sounds decidedly wrong  :stickpoke:

I don't understand a word of the foreign lingo  :headscratch: I assume it says "good stuff", which it is  :)

Jo
Enjoyment is more important than achievement.

Offline Admiral_dk

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Re: Mercedes-Benz W165 Grand Prix engine in 1:3 scale
« Reply #449 on: July 25, 2021, 10:16:51 PM »
Sorry Jo - don't want us (or me) to end in trouble - it's just getting rather hard to find new superlatives ....

Second paragraph was a reply to a comment from Mike earlier about why he didn't do it the simple way (answer : not possible) and I gave a condensed Tech (in the same language) reply, to why I hadn't considered this .... Sorry if it got a bit to special.

Back to subject - I really love to see the masters here do their thing (craft + ingenuity)  :praise2:
But that is not to say that beginners (and every-thing / -one, in between) builds are not part of what is important here. So who ever that got the time and interest to do the effort in posting here - PLEASE do  :cheers:

Per