Who sells shaft couplers?

[Tom_M]

I'm in need of a few shaft couplers to go from 1/4" stepper shaft to 1/2" Acme screw.
I've seen derlin ones, but looking for aluminum or steel.

TIA

[Al_The_Man]

Misumi is one source.
Al.

[DonFrambach]

I have two of these aluminum couplers on my machine from CNCRouterParts.com:
CNCRouterParts

My "x" axis has a delrin coupler that is working fine for me. I got it from DumpsterCNC.com

[Fastest1]

Another member just posted this companies info. Pretty informative too. Shaft Collar, Rigid Coupling & Flexible Shaft Coupling Manufacturer

[paul3112]

Motor Couplers : Homann Designs!, The preferred CNC Component Supplier

[wildwestpat]

If in doubt try eBay.

Regards - Pat

[LeeWay]

McMaster-Carr

[BackyardWorkshop]

I got mine from Enco - Enco - Guaranteed Lowest Prices on Machinery, Tools and Shop Supplies

[lclore]

Google KTR Couplers. 3 piece spyder type with varying durometer inserts. reasonable too.

[LeeWay]

Just an FYI.
Aluminum helical type couplers are not always zero backlash nor are they heavy duty. They can break.
Spider type couplings also vary greatly in the amount of backlash you can expect. Some are much better than others with the harder spiders being better.
Oldham type couplings are what I am going with now on everything except where I have SS helicals. I think I went with acetal joints in the Olhams.
I also buy only clamp on style couplings now. If you have ever chased set screws after they loosen up, you too would be a fan of the clamp style.
There are a few places in a cnc build where you can cut a few corners. Couplings are not in those places.

[lclore]

adding to Lee's comments:
there is no such thing as a zero backlash coupling. I've proven it ZeroMax, KTR, Gerwah, etc. in custom assembly equipment with all sorts of servo sizes. marketing usually defies physics without much concern... There is just very, very low backlash.

KTR offers a split collar hub- highly recommended cause rolling a keyway or a loose set screw to the shaft can be a massive pain.

also, i use KTR's on similar sized shafts to what you reference in your original question on my cnc routers and no problems. good luck!

[stevenray]

I'm in need of a few shaft couplers to go from 1/4" stepper shaft to 1/2" Acme screw.
I've seen derlin ones, but looking for aluminum or steel.

TIA

Mcmaster.com
Grainger.com
motionindustries.com
applied.com