Reddit reviews OctagonStar Flexible Couplings 5mm to 8mm NEMA 17 Shaft for RepRap 3D Printer or CNC Machine（2PCS）

We found 3 Reddit comments about OctagonStar Flexible Couplings 5mm to 8mm NEMA 17 Shaft for RepRap 3D Printer or CNC Machine（2PCS）. Here are the top ones, ranked by their Reddit score.

Flexibility of this coupler removes stress between motor and driving component.Compatible with NEMA 17 stepper motors (for 5mm to 8mm shaft diameter).Useful in RepRap 3D Printers and small CNC machines.Dimensions: 19mm x 25mm.NOTE:OctagonStar Quality Assurance.Item package or product surface have OctagonStar brand identity. If you feel to buy isn't OctagonStar item, you can return or exchange.

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3 Reddit comments about OctagonStar Flexible Couplings 5mm to 8mm NEMA 17 Shaft for RepRap 3D Printer or CNC Machine（2PCS）:

u/notsohyphy · 2 pointsr/ender3

worst case you can get an entire new one: https://www.amazon.com/dp/B01HBPHSII

Otherwise, take out the grub screw and measure it, and see if a local hardware store can sell you that size (or a tiny bit longer, as long as it doesn't stick out too far

u/cap9qd · 1 pointr/wanhaoi3

I did all of those upgrades plus the extruder gear change. It prints great and highly recommended. The microswiss machined idler stuff is nice but I'm not sure how nessassary it was. I have that fan and have had no issues with 11+ hour prints.

Edit:

I added these split Zaxis couplers. https://www.amazon.com/dp/B01HBPHSII/

I added this gear: https://www.amazon.com/dp/B06ZYG5Z47/

And the Zaxis brace kit from GulfCoast also.

I've been pretty happy with these upgrades.

I added the Z probe for ABL and used a PEI sheet vs the old sticker. I tried the glass and had good luck until it chipped...too much abs adhesion with the juice.

u/Compl3t3lyInnocent · 1 pointr/3Dprinting

That's very significant and cyclical.

My first impression is to look at your lead screws which means tearing down your printer, taking out the lead screws, rolling them over a flat surface. If you they don't roll flat then there's a couple of things you can do. First try flex couplers. This is the cheap and easy solution and TBH no lead screw is completely straight without spending quite a bit of money. Second is you can replace your lead screws if the couplers don't help and you believe the bend in the screws is serious enough to warrant the cost.