I got tired of having my idlers mounts always cracking after some use (and abuse). Even the beefer remixes failed with some time due to cracks developing between layers.

As an engineer I am aware that the position that the mounts were printed rendered a fatigue sensitive part! The tension works against the layers and even the beefer remixes had issues crack propagation due to layers. There are remixes that can be printed standing up but they need an awful amount of supports at areas that I was not comfortable with as they needed mechanical precision to be good.

So I designed these idler mounts to be printed at a position that will not align the layers with loads. They can be printed without any supports. They can use inserts or nuts (form any side). Also these mounts are symmetrical and can be used on both sides. They need 3x M30x30 and nuts each.

"Robust and reliable" is yet to be proven :D

They areNOT compatible with 3030R extrusions without interfering with the closing panels

Update

Added ridge for better alignment and one layer "surface cap" to support the screw holes. Thank you StvPtrsn for the great suggestion!

V3 Version with more StvPtrsn inputs

Update

Added front idler mount for this great thing! https://www.thingiverse.com/thing:2975496 just print one of the "front" version and two part "B"s and you have both front mounts! :D They do not need the spacer as it integrated.

Update

The new R version is MUCH better. It is compatible with 3030R extrusions where you can close the printer with 4mm panels. Also, it can remove the Y-axis without removing the idlers or belt!

Print Settings

Printer:

Hypercube Evolution

Rafts:

Supports:

No

Resolution:

Infill:

50%

Notes: