PTFE Spring/Spacer replacement with viewing-hole for UM2-series

A rigid spacer for the PTFE/TFM-coupler with a hole it where you can see that the bowden is properly seated.

3D printer parts and enhancements

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Description

A rigid spacer for the PTFE/TFM with a viewing hole where one can check that the bowden tube is properly seated.
This spacer can also replace the sometimes problematic spring on the UM2-machines.

I made the spacer 9.6 mm thick, compared to 9.4 mm for the rigid metal spacer on the UM2+, to compensate for bed-leveling inaccuracies.
This means that in normal cases there should be a small gap between the heat break and the block when tightened (see picture).

I recommend to use ABS, CPE or other materials that can take a bit more temperature than PLA for this print.
100% infill works best.

Materials and methods

~1 gram of plastic (temperature resistant, not PLA)

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C9e1692204e72514bcc46bbbfdc9a642?default=blank&size=40MacMA added this to the Steffen collection ago
519d36ab12e43fef1911c28f765cf4df?default=blank&size=40Dave added this to the Dave’s Collection collection ago
Mini simbolo logo3dsolid 90 80pxFerGazz added this to the Upgrades and Mods collection ago
Mini imageIzzy added this to the Enhancments collection ago
60c8691cedfcf939fc352716b43d5248?default=blank&size=40Chris Branson added this to the Printer Parts collection ago
Mini reiner 001 2Reiner Bühl added this to the Ultimaker2 collection ago
Cc08ffa669f01f88c5864727d98fa191?default=blank&size=40nilrog added this to the Ultimaker extras collection ago
7e45445faf9b67ba779ea0486ed9e53c?default=blank&size=40Anders Olsson published this design ago