# Spring-Loaded Backlash Nut Installation Guide for LongMill CNCs by Sienci Labs, Updated

**URL:** <https://forum.sienci.com/t/spring-loaded-backlash-nut-installation-guide-for-longmill-cncs-by-sienci-labs-updated/11513>\
**Category:** Guides & Resources\
**Created:** [March 7, 2024, 9:08pm UTC](https://forum.sienci.com/t/spring-loaded-backlash-nut-installation-guide-for-longmill-cncs-by-sienci-labs-updated/11513 "2024-03-07T21:08:00Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![mollysaynavong](https://forum.sienci.com/user_avatar/forum.sienci.com/mollysaynavong/32/5054_2.png) [@mollysaynavong](https://forum.sienci.com/u/mollysaynavong)\
**Post date:** [March 7, 2024, 9:08pm UTC](https://forum.sienci.com/t/spring-loaded-backlash-nut-installation-guide-for-longmill-cncs-by-sienci-labs-updated/11513/1 "2024-03-07T21:08:00Z")

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Hey everyone. Check out Jason’s updated Spring Loaded Anti-Backlash Nut installation video.

For more information, watch the full video. Make sure to subscribe to our channel for more CNC videos.

Video:

[![](https://img.youtube.com/vi/1Cl_ykfQgqQ/maxresdefault.jpg "Spring-Loaded Backlash Nut Installation Guide for LongMill CNCs by Sienci Labs, Updated") ](https://www.youtube.com/watch?v=1Cl_ykfQgqQ)

T8 Spring Loaded Anti-Backlash Nut

> **[T8 Spring Loaded Anti-Backlash Nut (4pcs) | Sienci Labs](https://sienci.com/product/t8-spring-loaded-anti-backlash-nut/?utm_source=forum&utm_medium=video&utm_campaign=customer-support&utm_content=cs-tutorials)**
>
> The Spring Loaded Anti-Backlash Nut is designed to be the successor to the regular T8 Delrin Anti-Backlash Block. The springs are designed to radially load the lead screws to adjust for backlash, leading to smoother movement and no adjustments needed...

For those with the 48x30 LongMill, you will also need the T12 Spring Loaded Nut.

T12 Spring Loaded Anti-Backlash Nut

> **[T12 Spring Loaded Anti-Backlash Nut (1pc) | Sienci Labs](https://sienci.com/product/t12-spring-loaded-anti-backlash-nut-1pc/?utm_source=forum&utm_medium=video&utm_campaign=customer-support&utm_content=cs-tutorials)**
>
> ASSEMBLY INSTRUCTIONS WILL BE UPLOADED IN THE COMING DAYS. COMPATIBLE WITH THE T12 LEAD SCREW USED ON THE 48" X AXIS RAIL ON LONGMILL MK1 AND MK2 MACHINES.