# Spindles - Lingering Questions

**URL:** <https://forum.onefinitycnc.com/t/spindles-lingering-questions/8643>\
**Category:** Uncategorized\
**Created:** [November 1, 2021, 1:59pm UTC](https://forum.onefinitycnc.com/t/spindles-lingering-questions/8643 "2021-11-01T13:59:54Z")\
**Posts on this page:** 1\
**Showing post:** 29

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**Author:** ![349iq2345](https://avatars.discourse-cdn.com/v4/letter/3/bb73d2/32.png) [@349iq2345](https://forum.onefinitycnc.com/u/349iq2345)\
**Post date:** [November 6, 2021, 12:13pm UTC](https://forum.onefinitycnc.com/t/spindles-lingering-questions/8643/29 "2021-11-06T12:13:43Z")

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Hey Bob, hey Jim @Webb , hey all,

I already mentioned the [link to the Mafell FM above](https://forum.onefinitycnc.com/t/spindles-lingering-questions/8643/6) with the hint that’s not a spindle but a milling motor, i.e. not an [3-phase Asynchronous (brushless) Motor](https://en.wikipedia.org/wiki/Induction%20motor) but a [Universal motor](https://en.wikipedia.org/wiki/Universal_motor) with [carbon-brush commutators](https://en.wikipedia.org/wiki/Commutator_(electric)). As @ben [pointed out here](https://forum.onefinitycnc.com/t/air-cooled-spindle/5951/24), it is available only for a 43 mm Euro mount which the Onefinity does not offer, or with this tool changing mechanism that would require a custom Milling Motor Mount either.

> [@Bob\_D](#):
>
> You might also be interested in his recent dust boot build video which uses the 4th axis to automate dust boot elevation.

Yes I know this Marius’ video, this is very cool, he builds it out of plywood, you got to see it:

[![](https://us1.discourse-cdn.com/flex022/uploads/onefinitycnc/original/3X/c/9/c9c7689ca3643631a0d4b7948fedd9d5ce76420f.jpeg "Engineering an Automatic CNC Dust-Shoe") ](https://www.youtube.com/watch?v=IF8U8nd5oSM)

Engineering an Automatic CNC Dust-Shoe

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