Simple Barbell Collar v2 (50mm 28mm 26mm)

@freemasen_305176 Nice! I'm happy it worked

@MaciaIT_255930 Actually, just updating to the new 5 and 6 worked quite well! I will try and snag a picture soon

@freemasen_305176 I have a suggestion, try to scale just component 3 around 4% in XY. This should reduce the closing force and avouid other broken pieces

@MaciaIT_255930 Thanks for the reply! I tried printing component 3 at 100%, leaving the rest the same and still ended up with a broke part (though I was able to get it on the bar once, the second time it broke which seems like an improvement).

I am going to try re-printing component 3 at 100% and update components 5 and 6 to your new designs. I'll let you know how that goes! (edited)

@freemasen_305176 Nope, not expected. It should mesure roughly 48.5mm at it's smallest diameter. At 15% infil with just a couple of perimeters it is expected to break tho. There is no way the closing mechanism will take the ammount of stress required if it's not solid.
You could try to print just the closing levers at 100% infil. You may also try to scale the model around 2% in XY.
I've also just updated component 5 and 6. The new version reduces the stress on the lever.

PS you're doing nothing wrong. With 3D printing it's like this...what may be working with my printer may not be working with yours.
For example my printer tends to overextrude so I had to drill all the holes to their final dimensions. Maybe this created enough clearance to allow the collar to work properly. (edited)