# Using the CNCDepot spindle, Z-20 gantry rework **URL:** \ **Category:** Spindle/VFD (Aftermarket/Unsupported)\ **Created:** [April 10, 2023, 3:25pm UTC](https://forum.onefinitycnc.com/t/using-the-cncdepot-spindle-z-20-gantry-rework/19948 "2023-04-10T15:25:17Z")\ **Posts on this page:** 1\ **Showing post:** 3
**Author:** ![349iq2345](https://avatars.discourse-cdn.com/v4/letter/3/bb73d2/32.png) [@349iq2345](https://forum.onefinitycnc.com/u/349iq2345)\ **Post date:** [April 10, 2023, 4:45pm UTC](https://forum.onefinitycnc.com/t/using-the-cncdepot-spindle-z-20-gantry-rework/19948/3 "2023-04-10T16:45:13Z")
Hey Carl and Lynn, > [@CandL](#): > > I am currently looking at the FM30 … it’s mounting is different. Basically it wants a flat plate mount. Is the spindle mount on the Z-20 attached to the gantry or is it “integral” i.e, I get to machine a big piece and replace the existing spindle mount by disassembling the Z-20. The X carriage is flat and you have the threaded holes with which you can mount the Z assembly at different heights, so removing the Z assembly and attaching something else is easy, however you have a lot of choices for a Z assembly with Z slider that are offered separately. You might be interested in this: - [Universal Z assembly](https://forum.onefinitycnc.com/t/universal-z-axis-assembly/4415) - > [@Z axis up or down slots](https://forum.onefinitycnc.com/t/z-axis-up-or-down-slots/19691/2): > > I am already thinking of making my own Z assembly for a longer time, a [more universal assembly](https://forum.onefinitycnc.com/t/universal-z-axis-assembly/4415/13) which would enable to attach a spindle like a [Teknomotor](https://www.teknomotor.com/product/applications/spindles-for-cnc-router-machine-applications/4147-c-db-hsk32c-hy-2/) or an [Elte](https://www.elte.eu/en/component/content/article/123-products/af-automat-tool-changer-series/af-liquid-air/178-af90-cu-iso20-30-hsk-e-25-e32-en?Itemid=250). What you would need is someone who can mill the parts out of aluminium. By replacing the Z assembly and the Z slider, you may also get a slider more chatter-safe, because unlike the Onefinity Z sliders (both models), which have only one linear bearing per rail, … > [@Half-inch bit limitations](https://forum.onefinitycnc.com/t/half-inch-bit-limitations/19031/3): > > …most CNC mills have **two linear bearings per rail** , as can be seen [here](https://forum.onefinitycnc.com/t/universal-z-axis-assembly/4415/13), [here (RoverCNC)](https://www.rovercnc.com/collections/z-axis-collection/products/rovercnc-z-axis-assembly-200mm-stroke-7-87?variant=53751165333), or [here (Sorotec Alu-Line)](https://www.sorotec.de/shop/DIY-Kit-Z-Axis-Alu-Line.html). > [@Waste Board location](https://forum.onefinitycnc.com/t/waste-board-location/19854/2): > > Unfortunately the Onefinity milling motor mount, unlike on [other machines](https://forum.onefinitycnc.com/t/machinist-in-x-50/8159/18) (see also [here](https://forum.onefinitycnc.com/t/machinist-in-x-50/8159/10), [here](https://forum.onefinitycnc.com/t/offer-a-43mm-spindle-mount-option-for-the-elite-series/19095/3) and [here](https://forum.onefinitycnc.com/t/43mm-euro-spindle/15188/28)), does not protrude downwards beyond the lower end of the Z assembly. > > For these reasons, some people replaced the Onefinity Z assembly by a [Universal Z assembly](https://forum.onefinitycnc.com/t/universal-z-axis-assembly/4415). How such a Z assembly/spindle slider could look like [is shown below](https://youtu.be/qHRkLz7IZT8?t=1147&list=PLx3FKzVphd7cRb9nwFMyCkJLcRBChdojC&index=17), see also [RoverCNC Z assembly](https://www.rovercnc.com/collections/z-axis-collection/products/rovercnc-z-axis-assembly-200mm-stroke-7-87?variant=53751165333) or [Sorotec Z-Axis DIY-Kit “Alu-Line”](https://www.sorotec.de/shop/DIY-Kit-Z-Axis-Alu-Line.html) > > [![RoboCNC_Z_slider_03](https://us1.discourse-cdn.com/flex022/uploads/onefinitycnc/original/3X/c/b/cb8bedbeb54bbde410955e2577d8b594b948200d.jpeg)](https://youtu.be/qHRkLz7IZT8?t=1147&list=PLx3FKzVphd7cRb9nwFMyCkJLcRBChdojC&index=17) I don’t know if you can machine aluminium, but if you look at this video, this is a Z assembly that the video author made himself. To see how the plate looks like at its back you got to go one video up in the playlist and start at #1. #### See also - [Offer a 43mm Spindle Mount Option for the Elite Series – Post #7 by Aiph5u](https://forum.onefinitycnc.com/t/offer-a-43mm-spindle-mount-option-for-the-elite-series/19095/7) --- _[View the full topic](https://forum.onefinitycnc.com/t/using-the-cncdepot-spindle-z-20-gantry-rework/19948)._