Coupling....is this close enough?

[HereinCS]

I found a great page from the Misumi site that describes the types of coupling and its uses very well. In case some one needs a link.

My question is: my shaft size is 15.875 (or 5/8) Misumi can custom make shaft size only to .1mm. The closest i can get is 15.9. Is this good enough?

[Phife]

which one on that pdf are you getting?

also the size should be fine, I wouldnt worry about it too much, its really easy to drill a coupling out using a drill press if its too small, and if you use a clamp style coupling you can clamp it down and it should get a little smaller.

[HereinCS]

I'm using the mcslcrk40-ldc15.9-14. I'd like to use the scxw, but I need a key groove on one side for the servo.

[metalworkz]

I think since the difference in size is only .0009842" it will probably work fine.

[Phife]

I still highly recommend the slit style or helical couplers, I really like mine, they are 1 piece, self supporting, and actually allow you to see slight misalignments and you can actually use them to align up your motor to screw.

[HereinCS]

Originally Posted by Phife I still highly recommend the slit style or helical couplers, I really like mine, they are 1 piece, self supporting, and actually allow you to see slight misalignments and you can actually use them to align up your motor to screw.

I've looked at that and I really wanted to use them. Maybe you can help me again.

1. My servo on all axis has a 14mm shaft with a key
2. My x axis screws have 15.875mm end mill
3. My y axis screw has 10mm end mill
4. My z axis screw has 8mm end mill

I've looked at McMaster's and the helical couplings don't have key grooves, and they don't come with the correct sizes that I need. If you know of another source, please let me know. Thanks.

[Phife]

I would ignore the key, or perhaps drill your couplers, tap and add a set screw to act as a key.
Also you should have no problem drilling out a 15mm to 15.875mm using a drill press and a 5/8 drill bit. just make sure to use a vice or solid mounting method.

I had to drill my 14mm couplings to 15.875, it really was very easy and turned out fine.

[louieatienza]

http://www.lovejoy-inc.com/products/...couplings.aspx

the GS model is anti-backlash, with clamp coneectos...

[HereinCS]

I looked up the lovejoy equivalent on Misumi's site. That model is not recommended for precision movements. Backlash is not acceptable.