# Taz 6 x axis 12 mm lower rail locking device

**URL:** <https://forum.lulzbot.com/t/taz-6-x-axis-12-mm-lower-rail-locking-device/26495>\
**Category:** Hardware\
**Created:** [March 16, 2024, 1:50pm UTC](https://forum.lulzbot.com/t/taz-6-x-axis-12-mm-lower-rail-locking-device/26495 "2024-03-16T13:50:42Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![lewers](https://avatars.discourse-cdn.com/v4/letter/l/2bfe46/32.png) [@lewers](https://forum.lulzbot.com/u/lewers)\
**Post date:** [March 16, 2024, 1:50pm UTC](https://forum.lulzbot.com/t/taz-6-x-axis-12-mm-lower-rail-locking-device/26495/1 "2024-03-16T13:50:42Z")

</div>

How to remove the z carriage idler part which has cracked around the 12 mm lower rod and causes problems with the X belt tension?  
Your advice is most appreciated.  
Regards,  
Rob Hunter

---

<div class="post-metadata">

**Author:** ![Wrathernaut](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.lulzbot.com/wrathernaut/32/13542_2.png) [@Wrathernaut](https://forum.lulzbot.com/u/Wrathernaut)\
**Post date:** [March 16, 2024, 3:10pm UTC](https://forum.lulzbot.com/t/taz-6-x-axis-12-mm-lower-rail-locking-device/26495/2 "2024-03-16T15:10:33Z")

</div>

When I swapped x carriages on mine, I removed the top plates on the frame, and twisted the rods manually (very tedious… make sure you raise it before disassembly!).

---

<div class="post-metadata">

**Author:** ![lewers](https://avatars.discourse-cdn.com/v4/letter/l/2bfe46/32.png) [@lewers](https://forum.lulzbot.com/u/lewers)\
**Post date:** [March 22, 2024, 11:46am UTC](https://forum.lulzbot.com/t/taz-6-x-axis-12-mm-lower-rail-locking-device/26495/3 "2024-03-22T11:46:53Z")

</div>

Thanks for your reply and I agree with your comments about it being a very tedious task. At this stage I have decided to renew all the 12 mm X - 10 mm Z linear bearings and print the new parts in PET-G CF as a replacement material seeing how the other material had failed .  
Much appreciate your input.  
Regards,  
Rob