The Craftmans Shop > Radio Control Models
1/16 Scale RC Truck parts
ddmckee54:
Yeah, about Plan B....
It turns out that when I reduced the depth of the hex pocket in the rear wheels I reduced the wheel track at the same time. This would have caused problems down the road because it also reduced my already minimal tire clearance to the frame rails. The "Bag of Misfit Parts" continues to grow.
For the last couple of days - ish, I have been working on adapting an idea for a powered steer axle that I stole from Blender on another forum. I've now got it to the point where I'm putting a front diff assembly together in Alibre to check the fits. It looks like about the only modifications I'll have to make to the diff housing models is to turn off the step that forms the pads on the outboard ends of the housing halves. I think I found some Nylon flanged bushings and shoulder bolts on Ebay that I can use for the pivots on the knuckles. I'll have to verify sizes, get some ordered, and modify the 3D models to suit. I've got a lot of clean-up work to do on the models before they'll be printable. When I can remember, or figure out again, what I did/need to do to show the suspension assembly I'll post what that assembly looks like. I got a 3D model of what would probably be the shortest 1/16 scale 6x6 truck frame and a Hendrickson style walking beam rear suspension. So far it LOOKS like everything will clear without major issues. I've just been working on the driver's side of the front axle, but once I'm happy with that, mirroring the parts to the other side is simple.
Speaking of printing, Ebay made me a offer on a certified re-furbished Creality Mage S printer that I couldn't refuse. So I am now jumping down to resin printing rabbit hole - wish me luck.
kayzed1:
me too! :clap:
ddmckee54:
I mentioned in an earlier post that the ER16 chuck I got for the Sherline mounts in the spindle's Morse taper and uses a 1/4-20 bolt for the drawbar. I know that this will give me better concentricity, but the work I'll be doing in the foreseeable future doesn't require that level of accuracy. Besides, I really like to be able shove a long-ish part through into the spindle bore; like a 102mm long donor axle that needs to be shortened. So today I went searching for another ER16 collet chuck for the Sherline's 3/4-16 spindle threads - I didn't find any.
I DID find one for a Taig lathe though, and I also found out that since they both use the same 3/4-16 threads on their spindles it will work just fine on the Sherline. Since the price seemed reasonable I arranged to get one headed my way. I also ordered some other little doo-dads that I'll be needing in the near future.
Getting the suspension assembly into a format useable on here was easier than I remembered. Alibre allowed me to export the assembly as a JPG file. I then used Gimp to scale the image to a 640x480 format that most forums will accept. Then it was saved to Google Photos since a lot of forums require you to use 3rd party storage if images/videos. Annndd... you get something like this.
I know it's missing a lot of stuff, a couple of wheels, ALL the tires, drive shafts, fasteners, tie rod, not to mention the great gaping hole on the passenger's side where the pivots, steering knuckle, and CV joint should be. Cut me some slack, this is a Proof-of-Concept model, not a for-realsies highly detailed 3D model.
ddmckee54:
I just finished modifying the second set of donor axles. They look remarkably like the first set, just a little more consistent. One measures 69.95mm and the other is 69.97mm, I was aiming for 70.00mm - so I'm about 2 thou under with both of them.
I've still got some issues with the Sherline, the headstock bearings are stiff and kind of rough. They have been since I first started working on it. I suspect that the original grease in the shielded bearings has dried out. I've been dousing them with light oil in hopes of reconstituting the original grease but so far no luck. I'm thinking it's probably going to need new bearings.
The other issue is with the carriage lead screw, it binds up. However I only notice this when moving the carriage towards the headstock, and it only binds up when the handle is between about the 2:00 and 5:00 positions; the rest of the time it's OK. I'm thinking that when the Sherline did the nose-dive off the bench onto the drive dog for the threading attachment it left a boo-boo that I didn't find during the initial repair, which happened about a month before I started this thread. The ham-handed retired engineer that managed to knock it off the bench should have had his wages docked for the repairs, but since he doesn't get any wages docking them is kind of an empty threat.
vtsteam:
Sorry to hear about the lathe accident! :( Sounds like a bent lead screw. Maybe up near the handle. Any chance of taking it off and straightening?
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