# I need indept info on SPINDLES **URL:** \ **Category:** Spindle/VFD (Aftermarket/Unsupported)\ **Created:** [June 27, 2022, 2:24am UTC](https://forum.onefinitycnc.com/t/i-need-indept-info-on-spindles/13834 "2022-06-27T02:24:36Z")\ **Posts on this page:** 1\ **Showing post:** 2
**Author:** ![349iq2345](https://avatars.discourse-cdn.com/v4/letter/3/bb73d2/32.png) [@349iq2345](https://forum.onefinitycnc.com/u/349iq2345)\ **Post date:** [June 27, 2022, 2:38am UTC](https://forum.onefinitycnc.com/t/i-need-indept-info-on-spindles/13834/2 "2022-06-27T02:38:29Z")
Hey Carlos, > [@camswoodcraft](#): > > I really only want to purchase once and not have to upgrade in the future to a better or larger one, I so I want to start with the biggest one I can get for my CNC, I would like it to be water cooled 220V, w/VFD the whole works, also do I need a larger hold down for this spindle? if you mean the biggest by size, on the Onefinity CNC you can mount a 80 mm diameter spindle with the [optional 80 mm spindle mount](https://www.onefinitycnc.com/product-page/80mm-spindle-mount). If you mean the biggest power, this would mean 2.2 kW, as more powerful spindles usually have a larger diameter. If you mean biggest milling bits, you should buy a spindle with [ER20 collet](https://forum.onefinitycnc.com/t/how-do-you-ensure-your-model-translates-to-reality/13579/24) size since this will allow you to use milling bits with shank diameter of up to 13 mm (including 1/2″ shanks). If you mean a big sum of money, I would recommend [Mechatron ATC-8022-42-HSK25 2.2 kW 42,000 rpm water-cooled](https://www.spindel-shop.de/en/high-frequency-spindles--Professional-Series/automatic-tool-change-spindle-ATC-Series/Water-Cooled-HF-Spindles--HF-Spindle--HF-Spindles--HF-Spindle--HF-Spindles--Motorspindle--Milling-Spindle--Grinding-Spindle-4-53-54-79.html) ([unboxing video](https://www.youtube.com/watch?v=vB_FvkllLPc)) with [HSK-E 25](https://en.wikipedia.org/wiki/Machine_taper#HSK_taper) machine taper and [automatic tool change](https://en.wikipedia.org/wiki/Automatic_tool_changer) ([automatic tool change video](https://youtu.be/Pc_Tfk-vIyk?t=93)), a [cooling station](https://www.spindel-shop.de/en/Cooling/Cooling-Systems/) and a ready-to-use [electrical and pneumatic control cabinet](https://www.spindel-shop.de/en/Electrical-Cabinets-mechatron/) with [Omron MX2 2.2 kW VFD](https://industrial.omron.co.uk/en/products/3G3MX2-AB022-E) inside. If you want something simpler but still industry-grade, you could go with [HFS-8022-24-ER20 2.2 kW 24,000 rpm water-cooled](https://www.spindel-shop.de/en/High-Frequency-Spindle-standard-Series/High-Frequency-Spindle-HFS-series/Water-Cooled-HF-Spindles--HF-Spindle--HF-Spindles--HF-Spindle--HF-Spindles--Motorspindle--Milling-Spindle--Grinding-Spindle-4.html) ([datasheet](https://www.mechatron-gmbh.de/fileadmin/user_upload/Datenblatt_HFS-8022-24-ER20.pdf)), buy an empty [control cabinet](https://forum.onefinitycnc.com/t/what-i-learned-while-upgrading-to-2-2kw-water-cooled-spindle/13430/12) and [equip it yourself](https://forum.onefinitycnc.com/t/hey-is-this-your-vfd-enclosure/10130/3) with a [VFD](https://www.hitachi-ies.co.jp/english/products/inv/wj200/index.htm) and the [rest](https://forum.onefinitycnc.com/t/hey-is-this-your-vfd-enclosure/10130/3). At least two persons in this forum own this spindle. Note that it is recommendable to always buy the spindle cable from spindle manufacturer. Note that some people [replace their z axis assembly](https://forum.onefinitycnc.com/t/universal-z-axis-assembly/4415) (see also [here](https://forum.onefinitycnc.com/t/has-anyone-replaced-their-z-axis-assembly-for-greater-travel/9028/) and [here](https://forum.onefinitycnc.com/t/any-hobbyist-grade-solutions-for-adding-automatic-tool-changes-to-onefinity/8476/7)) which would allow for even larger spindles. Welcome to the forum! #### See also [High-Frequency Spindles in Europe](https://forum.onefinitycnc.com/t/spindles-lingering-questions/8643/6#high-frequency-spindles-in-europe-1) --- _[View the full topic](https://forum.onefinitycnc.com/t/i-need-indept-info-on-spindles/13834)._