# Spindle Upgrade - Z-Axis Stepper Mount issue
**URL:** https://forum.onefinitycnc.com/t/spindle-upgrade-z-axis-stepper-mount-issue/9134
**Category:** Original/PRO Series (Buildbotics) (Gen 1)
**Created:** [November 25, 2021, 2:48pm UTC](https://forum.onefinitycnc.com/t/spindle-upgrade-z-axis-stepper-mount-issue/9134 "2021-11-25T14:48:54Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@CWBox](https://forum.onefinitycnc.com/u/CWBox)
#### Post date: [November 25, 2021, 2:48pm UTC](https://forum.onefinitycnc.com/t/spindle-upgrade-z-axis-stepper-mount-issue/9134/1 "2021-11-25T14:48:54Z")
Happy Thanksgiving! Have any of you who have installed a Spindle found a way to deal with the Z-Axis stepper mount obstructing the Spindle’s vertical positioning within the spindle mount? The back of the Spindle cannot clear the Stepper Mount because the Spindle Mounting clamp is too close to the slide posts. I was thinking of maybe a “shaft extender”, additional coupling, and 2 new mounting block spacers? Or I may just mill some Aluminum Spacers and just raise the entire machine 2" off the table. Any thoughts, opinions, or experience would be most appreciated.
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### Author:  [@349iq2345](https://forum.onefinitycnc.com/u/349iq2345)
#### Post date: [November 25, 2021, 2:53pm UTC](https://forum.onefinitycnc.com/t/spindle-upgrade-z-axis-stepper-mount-issue/9134/2 "2021-11-25T14:53:25Z")
Hey Carmen,
do you have the original spindle mount? With the original 65 mm mount, the [spindle will not clear the stepper](https://forum.onefinitycnc.com/t/air-cooled-spindle/5951/33) so you have limitations on spindle length and/or spindle position in the mount. With the optional [80 mm spindle mount](https://www.onefinitycnc.com/product-page/80mm-spindle-mount), the spindle [clears the stepper](https://forum.onefinitycnc.com/t/upgrading-stepper-motor-for-80mm-spindle/6717/58) so you don’t have this limitation.
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### Author:  [@CWBox](https://forum.onefinitycnc.com/u/CWBox)
#### Post date: [November 25, 2021, 2:59pm UTC](https://forum.onefinitycnc.com/t/spindle-upgrade-z-axis-stepper-mount-issue/9134/3 "2021-11-25T14:59:01Z")
I am using the original 65mm mount. I do have a 2nd Spindle kit with an 85mm Spindle, but was trying to save it for another project. Would be nice to see a redesign of the 65mm mount so that the spindle would clear the stepper though.
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### Author:  [@349iq2345](https://forum.onefinitycnc.com/u/349iq2345)
#### Post date: [November 25, 2021, 3:03pm UTC](https://forum.onefinitycnc.com/t/spindle-upgrade-z-axis-stepper-mount-issue/9134/4 "2021-11-25T15:03:46Z")
Hey Carmen,
> [@CWBox](#):
>
> Would be nice to see a redesign of the 65mm mount so that the spindle would clear the stepper though.
You might as well wait for Christmas and Easter to be the same day. Onefinity stated clearly that they [don’t support anything other than the trim router](https://forum.onefinitycnc.com/t/supported-routers-spindles/36).
I think the community was very happy that they [responded to the demand](https://forum.onefinitycnc.com/t/80mm-spindle-mount-announcement/5861/3) for a 80 mm spindle mount.