I bought several of the Radio Shack V.5 kits, and noticed there were NO shaft collars in any of them! Running to the hardware store, I find they are both VERY expensive (several dollars each!), AND the standard sizes they stock don’t QUITE fit the 1/8" square shafts.
SO… I need to fab some ASAP today on a lathe, for an event starting TOMORROW! (I have the raw bar stock for this now…)
Could someone please quickly measure a standard collar, and post the specs for it?
I NEED: … ID, OD, Width, Setscrew size & type (thread, length)…
The setscrew isn’t vital (the first 3 numbers are more important to me), but it would be NICE to only require the same basic Allen Wrench as the cap head screws and have them mix with others, so I’m ASSUMING it’s either a 10-24 or 10-32 Allen Head setscrew.
BTW… Are you SURE about the setscrew? According to Wikipedia: Hex key - Wikipedia ,
a #8 setscrew NORMALLY uses a 9/64" allen wrench, whereas
a #10 setscrew NORMALLY uses the 5/32"
(which I thought was the VEX screw wrench, isn’t it?)
I’d be REALLY surprised if you’d need two different wrenches.
(Maybe they obtained a non-standard 8-32 screw, to keep it compatible…)
Unfortunately, I don’t have a compatible CAD available right now to view those docs.
OOC, Can you please take another quick peek at the CAD again, and see which WRENCH the setscrew uses? Is it 5/32", or another size?
(To measure an Allen Wrench’s size, simply measure between opposite flats.)
The cad shows it as 5/64. I know that the wrench for the setscrew is the same wrench as for the 6-32 motor mount screws, which is indeed smaller than the standard 8-32 vex screws.
As an extension, you shouldn’t even worry about the set screw if you are short on time. Any normal 8-32 screw from the vex kit will work, and you won’t have to worry about the 5/64" allen wrench either.
You might want to try a hobby store. They’ll probably be called “wheel collars” found usually with the r/c airplane stuff. They use them to attach wheels onto planes which freespin.