MadModder

Quote from: vtsteam on April 11, 2025, 12:22:18 PM

steadying hand pressure by increasing revs.

Have you tried clamping it down to the bench?

Russell

Heh, nope, Russell! 

I've not had any experience sharpening milling cutters, but surely the cutting edge should be a thin parallel strip, rather than the broad, triangular feature that you have achieved?

The picture shows a countersink bit not a milling cutter and a cheap one at that. However yes there should not be as much sharpened but that was me playing about and not really putting much thought into it. Hopefully perfection will come with experience of using the grinder but I wouldn't put money on it.

Well it's kind of disappointing to see the very small amount of interest most visitors to the site pay to people posting here. Other than a welcome few comments from old friends, it's as if we were alone.

Yet I'm seeing 2000 views a day on the progress of this little engine. and in the forum statistics on the front page right now, 500 visitors, and only three members signed in.

This is a rather sad state of affairs, and a forum like this will not continue unless others join, sign in, comment and, one hopes, even add interesting projects of their own. Certainly, now, I'm asking myself just who is it I want to communicate projects to? If it's just lurkers, bots, spiders and AI content reapers, then no thanks, I'd rather just work on my own.

Nope I'd rather talk with real people. Are there any out there in that group of 2000 views, or those 500 visitors today? Say something. Say hello. Say anything! Let us all who post here know that we have a reason to do so. Organic Intelligence. 

It is a really sad fact. It seems everywhere is quiet. I thought people may have moved to facebook groups but there is sod all on those as well. I remember back in 2009-2011, you could post a picture at 9am in the morning and you`d have a hand full of replies and comments by midday. I don`t know what has happened. I think it is quite self for filling as well- the less people contribute, the less it makes me contribute. I`m not very skilled and learnt everything from this forum and its users when I was really getting into engineering. I use to comment on the comments based on something interesting someone had said, as much as replying to the poster. Discussions spiralled. It is why I started making my little videos but it is all because I enjoy doing it, feedback is minimum.

Hopefully it`ll come back around and people will start posting more.

Your engine is looking great and I`ve enjoyed the pictures 

Sometimes I think Quality Control is a totally unknown concept in certain parts of the far-east.  Some of the stuff is high quality, but there are a LOT of times when what you actually get is a kit of mostly usable parts.  ALL of the SCX10 rear axles I ordered came from different vendors, but the same supplier, and none of them were really usable when the arrived.  All of them are almost impossible to turn.  I chased that problem back to the fact that they arrived with an interference fit between the spider gears in the differential.  I had to remove 0.3mm from the backside of each axle gear before things started to work properly.  BUT, they are fixable. 

I ordered some plastic bushings for the knuckle pivots on the powered steer axle I'm building.  They were SUPPOSED to have a 3mm ID, it's under 2.8mm.  Fortunately the OD is correct so they also are fixable.

I ordered drive shafts from 3 different manufacturers, 2 out of the 3 suppliers have the knuckles properly phased to minimize vibration.  The third supplier... not so much.  The knuckles are are least 10 degrees out of phase, and I'm not sure if there's going to be any fixing it.

And then, I've got a gotcha that's kinda my own creation.  ALL of the drive shafts that I ordered are SUPPOSED to fit an SCX10, come with a 5mm bore  and have drive pins that are threaded M4 on one end with the other end turned down to 2.5mm.  My axles are SUPPOSED to be SCX10 replacement axles, but they all have holes for 2mm drive pins in the 5mm OD pinion shaft.   I could bore the pinion shafts out to 2.5mm, since the Kong axle that I have has a 5mm pinion shaft with a 2.5mm drive pin hole.  The Unimog replacement twin motor/2-speed gearbox that I got as a power unit has 4mm OD output shafts that are threaded M2.

So, here's my first dilemma, do I modify the pinion shafts?  Or, do I modify the drive pins?  Initially I was leaning towards modifying the drive pins, now I'm not so sure.  If I modify the pinion shafts, I just punch the drive pin holes out to 2.5mm and call it a day.  If I modify the drive pins by turning them down to 2mm, then I also have bush the hole in the drive shaft down to 2mm.  Otherwise they'd be, to quote Wes from Watch Wes Work, "floppin' around like a hot dog in a hallway."  Metal fatigue would probably cause the 2mm pin to break off in a short time.  I think I just talked myself into modifying the pinion shafts.

My second dilemma is that the output shafts on the Unimog transfer case have a 4mm OD.  Bushing the transfer case end of the drive shaft down to 4mm is no problem.  They also have a pre-machined flat that is threaded M2.  My first thought was to bore the M2 threads out to 2mm, since they are effectively that size now.  I was planning on just having one drive pin that would work on either end, but that's just gonna make a lot of extra work for myself.  I think what I'll do for the transfer case drive pins is cut a chunk off the 2.5mm end of the pin and turn the stub down to about 1.5mm - or whatever will fit in the M2 threads.  The set screw on the flat will be the actual clamping/driving force, the little stub is just extra insurance if the set screw comes loose.

Don

Hi folks,
A very varied week of jobs, encompassing consumer electronics, Welding and fabrication, garden tractors, fencing and tree husbandry! The yard tidy got more or less finished, the westwood got some much needed carb attention,and we got a lot more bank clearing and fencing done. Then back to the workshop for more clearing out and repairing!
Phil, in sunny and warm East Yorkshire!