Best flexible beam couplings according to redditors

We found 6 Reddit comments discussing the best flexible beam couplings. We ranked the 3 resulting products by number of redditors who mentioned them. Here are the top 20.

1. uxcell 5mmx8mm Motor Shaft Helical Beam Coupler Coupling 18mm Dia 25mm Length

4 mentions
uxcell 5mmx8mm Motor Shaft Helical Beam Coupler Coupling 18mm Dia 25mm Length
Product Name : Beam Coupling;Features : Screw Type(Coiling Clamping)Shaft Usage : 5mm to 8mm / 0.2" to 0.31"(1/5" to 5/16");Length : 25mm / 0.98"Diameter : 18mm / 0.71";Material : MaterialAluminum Alloy : Aluminum Alloy;Color : Silver ToneWeight : 14g;Package Content : 1 x Beam Coupling
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2. uxcell 8mm to 8mm Aluminum Alloy Shaft Coupling Flexible Coupler Motor Connector Joint L30xD25 Silver

1 mention
uxcell 8mm to 8mm Aluminum Alloy Shaft Coupling Flexible Coupler Motor Connector Joint L30xD25 Silver
Country of Manufacture: CHINA; Material: Aluminum AlloyNet Weight: 36g; Package Content: 1 x Shaft couplingMain Color: Silver Tone; Total Size: 30 x 25mm / 1.18 inch x 0.98 inch (L*D)Feature: Set screwsConnection Diameter: 8mm to 8mm/0.31 inch to 0.31 inch
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3. uxcell Shaft Coupler D18 L28 Flexible Coupling Motor Encoder Inner Dia. 6mm to 8mm

1 mention
uxcell Shaft Coupler D18 L28 Flexible Coupling Motor Encoder Inner Dia. 6mm to 8mm
18mm Diameter X 28mm LengthClamp-style mount for secure attachment to shaftAccommodates angular, axial and parallel misalignmentAluminum hubs for light weight, TPU elastomer for flexibilityShaft couplers are applied for connect servo motor, stepper motor, encoder, machine platform etc.
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Top Reddit comments about Flexible Beam Couplings:

u/1moresidequest · 5 pointsr/EngineeringStudents

Look into z rod couplers for 3d printers. The most common size is for an 8mm threaded rod.
There should be a lot of different options.

Here is an example of what I was thinking of:
uxcell 8mm to 8mm Stainless Steel Shaft Coupling Flexible Coupler Motor Connector Joint L30xD25 Silver https://www.amazon.com/dp/B07G6Q1GHN/ref=cm_sw_r_cp_apa_i_kCjhDbQB6CMGQ

u/kingfisher987 · 3 pointsr/3Dprinting

As others have stated it looks like Z wobble

Do you use Flexible Coupling's? (eg:https://www.amazon.com/uxcell-5mmx8mm-Helical-Coupler-Coupling/dp/B00KHTVOEU/ref=pd_lpo_328_lp_img_4?_encoding=UTF8&psc=1&refRID=C2PXGYBEHJNE7GHTR8RY)
To connect your Z motors to the rod/lead screw?

If so, I would swap this to a solid connector (And upgrade to lead screws if you haven't already)

Even these work better than the Flexible Connectors
http://www.thingiverse.com/thing:602481

u/alpachydermatologist · 1 pointr/3Dprinting

No problem. I believe most people use something like this to connect the screw to the Z stepper.

u/Kingbdude · 1 pointr/3Dprinting

X and Y look awesome, but you are experiencing LOTS of Z banding/wobble. Look into some Z axis stabilizers or some flexible Z axis couplings like these. Also it looks like you have some underextrusion on the top. Try either increasing the number of top layers or run an E-step calibration for your extruder

u/sbussinger · 1 pointr/PrintrBot

I made the mod to my Simple Metal and while it's sort of functional, it's making noises that obviously indicate some issues. I'm hoping someone here has some suggestions on what's wrong.

I used this leadscrew: http://amzn.com/B015PS2Z4K and this coupler: http://amzn.com/B00KHTVOEU that I'd picked up a few months ago. I'm using the Machine Control Panel of Simplify3D for my testing.

There's a small "thunk" every time I start moving the Z axis. Aside from that, moving the extruder assembly up is smooth. But moving the extruder assembly down is very herky-jerky. Something must be binding and catching but it's not obvious to me what.

If I remove the set screws attaching the lead screw to the adapter I can manually lift and lower the extruder assembly fairly smoothly. The lead screw can be pushed up and will drop down smoothly under gravity. The stepper spins smoothly both directions. Is it an issue with the coupler I'm using? I tried pushing the lead screw down as far as I could before tightening and leaving it up a bit before tightening it down to no difference. I'm thinking the "springy" coupler design was a bad choice?

Or is my problem elsewhere?

u/xantham · 1 pointr/hobbycnc

I ended up getting a double loop coupler this one so far it had reduced most if not all of the wobbling issue I was having it allows the shafts to be a good 2 or 3mm off and still spin as if they were perfectly aligned. I didn't think it would be very good because it looks like it wouldn't, but it actually seems decent so far. just waiting to see what the life of the thing is. hopefully it doesn't rip apart after 10 hours or something.