yes! One post about this phenomenon on the Z-16 assembly on Original Series here, with links to an interesting workaround:

Once the 80 mm spindle holder was out I ordered it and I came accross the question whether to buy a 2.2 kW spindle with ER-16 or with ER-20 collet. The first takes tool shanks from 1-10 mm and the latter from 1-13 mm, which would mean half-inch tools. But since at first I did not expect to use tools larger than 8 mm, I was unsure. I asked the manufacturer and he answered, the spindle with ER20 collet has larger bearings and a stiffier shaft. Larger bearings means longer life. Stiffier shaft means more precision. Also one should take into consideration that when using tools with a larger shank, the thicker the shank the stiffier the tool and so the longer the tools you can use – and thus the deeper the pockets you can mill into your workpiece. So I went for the ER20 spindle.

Er 11 colletsamazon

The combination of spindle RPM and machine feed rates/accelerations available with the Onefinity machines, means you can use the full range of end mill diameters available for both collet sizes, while also achieving optimum chip loads and MRRs.

Espressomatic, you were already plonked by me for six monthes in February in this forum. If you want it again, okay… One could get the impression that if you say you have trouble with a person, that this speaks more for them than against them

I’m not 100% sure, but if you have the new improved Onefinity HD slider, you should also have no problems with interferences or blockages.

And the question was not this. You say nothing with this. The readers here are left without without any idea what you mean and how you come up with it. And if Nick is a businessman, then your post would be an offense in my country and you could be legally sued for injunctive relief including payment of costs and damages.

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With the original 65 mm mount, the spindle will not clear the stepper so you have limitations on spindle length and/or spindle position in the mount. With the optional 80 mm spindle mount , the spindle clears the stepper so you don’t have this limitation.

Nick N. at Sola Fide Designs KC is also getting ready to launch his, but it will be an ISO30 with a unique mount as it is not an 80mm cylindrical bodied spindle.

From reading your comment, I thought there was a technical/mechanical reason for your opposition the Nick’s ATC offering, but given its tone and disparaging nature it would appear that there is a lot more involved here.

ER11 Collet Nut

Autotranslated with deepl.com: Criminal Code (StGB) – Federal Republic of Germany § 185 – Insult Insult shall be punishable by imprisonment for a term not exceeding one year or by a fine and, if the insult is committed in public, at a meeting, by disseminating a content (Section 11(3)) or by means of an assault, by imprisonment for a term not exceeding two years or by a fine. § 186 – Defamation Any person who, in relation to another, alleges or disseminates a fact which is likely to bring him into contempt or to disparage him in public opinion shall, unless such fact is demonstrably true, be liable to a custodial sentence not exceeding one year or to a monetary penalty and, if the offence is committed in public, at a meeting or by disseminating a content (Section 11(3)), to a custodial sentence not exceeding two years or to a monetary penalty.

This is a redesigned dare I say “improved” version of CNCDepot’s front mount spindle. In addition to replacing the mounting system Nick replaced the Z motor with the largest one Masso sold.

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In Europe you have 400 V three-phase electricity with at least 16 A per phase everywhere, which means you can buy a VFD with three-phase input and you can draw 11 kVA so use a 7.5 kW spindle on normal domestic supply (or the double if you have a 400 V three-phase circuit with 32 A), while in the US in domestic areas you have usually split-phase electricity with 120 V and 240 V which limits you to VFDs with single-phase input, and regarding available power on the supply circuits you can use a 1.5 kW spindle on a 120 V socket or a 2.2 kW spindle on a socket with 240 V.

I am fairly new to CNC machining, so I would wait to here from those more experienced. For my ATC build Ibought both ER20 and ER 16 ISO20 holders. Although the ER20 gives a wide range of options for end mill diameter, one consideration is the size of the holder. I can still put 1/4" end mills in my ER16 collet, but the smaller holder/nut diameter means I have more clearance when machining deeper in wood or aluminum, which for me was important.

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ER 11Collet nut dimensions

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you can see you can do everything with bits with a 8 mm shank (5/16", 0.3125"), so a spindle for ER-16 collets (bits with shank from 1 to 10 mm) would be enough, while a spindle for ER-11 collets (bits with shank from 1 to 7 mm) would be to small.

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When purchasing a spindle, the most important thing I can think of to consider is the clearance of the motor body and the Z-axis stepper motor. If you have the first generation Z-slider (a.k.a. Z16) and are using the default 65mm mounting bracket, you will likely run into trouble with the top of the spindle motor hitting the stepper motor. There are posts here, and probably Youtube, about this.

Regarding power, you can always choose the stronger spindle as well as the stronger VFD, as inside the VFD, you have to limit the max. power to be delivered as a mandatory setting anyway. You can use a weaker spindle on a stronger VFD by setting it accordingly, but you can even have a stronger spindle and use a VFD that only can deliver less power, and buy a stronger VFD later. What you have to consider as the most important thing regarding power, is what the supply circuit in your workshop can deliver. For this, you need to know the rated input current (in Ampères) of your VFD. For a 200–240 V VFD with single-phase input for a 2.2 kW spindle, this is usually 24 A:

Now you just have to retrofit a universal Z assembly to your Onefinity (or finally convince the Onefinity manufacturer to offer one), which would also be fine for using this or this (need no VFD!) (see also this video ).

Nick N. at Sola Fide Designs KC is also getting ready to launch his, but it will be an ISO30 with a unique mount as it is not an 80mm cylindrical bodied spindle.

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ER11 Collet 8mm

When purchasing a spindle, the most important thing I can think of to consider is the clearance of the motor body and the Z-axis stepper motor. If you have the first generation Z-slider (a.k.a. Z16) and are using the default 65mm mounting bracket, you will likely run into trouble with the top of the spindle motor hitting the stepper motor. There are posts here, and probably Youtube, about this.

you could better start to justify why you say the product mentioned above is not to recommend, or simply shut up, or risk to be plonked again.

You are correct, from my understanding. The Z-20 Gantry was disassembled, the 80mm mount was removed and a custom flat plate mount was made to fit the CNCDepot spindle.

ER11 Collet Set

And the question was not this. You say nothing with this. The readers here are left without without any idea what you mean and how you come up with it. And if Nick is a businessman, then your post would be an offense in my country and you could be legally sued for injunctive relief including payment of costs and damages.

Thinking about a spindle and wondering if I should go with ER 11 or ER 20. I’m leaning ER 20 so I can use 1/2" bits. I don’t think I’d ever need a 1/16" bit which I’d be missing out on. Am I missing anything?

If you purchased the optional 80mm mounting bracket for this Z16 slider, it should keep the spindle far enough away from the stepper motor.

I will most likely be taking advantage of the Elite upgrade. Along with that, I’ll need to get the heavy duty slider so must choose between the 65 and 80mm mounts. I’d like to upgrade to a spindle so figured now would be the time to do that as well and if I’m going to do that I’m going to go with pwnCNC. Among the choices there is ER 11 vs ER 20 so that’s what brought me to this question.

Carl and Lynn refers to this video series (they missed to make a youtube playlist of it). Haven’t looked at it yet (no need for U.S. spindles, I have enough spindle manufacturers in Europe )

Okay, I was going by what was available on the PwnCNC site. So is there an advantage of one over the other; is bigger better?

ER 11COLLET dimensions

Note that shown is the nameplate of a VFD for single-phase input (which is usual in the U.S. since you have split-phase electricity in U.S. domestic areas), which means that all the power comes over one input wire which explains why the input current is more than the double than the output current (where the current is spread over three wires, since any spindle is driven by three-phase electricity that the VFD, which in fact is an AC-to-DC-to-AC inverter, produces on the fly), and where the power is spread over three wires with 120° phase shift. On VFDs that have three-phase input, the input and the output current ratings differ less, only the VFD efficiency comes into play here.

er11 collet 1/4

I have hinted at this before, but Alex has ok’d the discussion. I have my Elite Foreman down with CNC Depot (cncdepot.net ) right now. They are putting a 2.2 Kw air cooled spindle, control box, ATC and a few other goodies. To quote them “High-precision, quality spindles, manufactured and supported in the Unites States!” I would advise you to take a look at the runouts they seem to me getting.

Unfortunately I blocked that person on Facebook a while back so I’m unable to copy any reference material. Anyone who hasn’t however can go ahead and read in both the official and unofficial 1F FB groups and come to their own conclusions.

Note that if you insist on using a 65 mm air-cooled spindle (e.g. like this one ), there is a solution to lift the stepper cage so that the spindle fits then and eliminates the “bumps the stepper” problem.

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Basically, I am getting a very similar setup to the Avid configuration. I am in a CNC class at a community college, so I will compare it’s set up to a Haas.

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But if you are used to bits with a shank of 1/4" (6.35 mm) like you used on your hand trim router, then a spindle for ER-11 collets is fine.

ER 11Collet holder

Hey, I just wanted to come here and say I’m not entirely sure what I did. I’m never in the forums. If you look up my posts on FB, I have no clue what you are referring to, as I’m always helping people with problems or other issues because they are new or just having a problem. If I offended you in any way, I do apologize. Could you please let me know what I said or did that made you so mad towards me if not, I understand thanks Nick. I’ll leave this here for people to go and check out my Etsy store reviews https://www.etsy.com/shop/SolaFideDesignsKc?ref=seller-platform-mcnav

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My spindle/ATC are coming from CNCDepot.net . These folks have been selling an Avid kit for some time, and for even longer selling retrofit kits. Check out Clough42 on youtube.

Note 1: To sell you 2.2 kW spindles for U.S. 110 V, chinese VFD manufacturers simply omit the input current rating on their nameplate and in their manuals. The rating would be too high on this power (2.2 kW) for any available 120 V circuit in U.S. domestic areas.

If you look at Sola Fide’s ATC video, it seems they did not really replace the Z assembly. But I think this would be easy as the Onefinity X carriage, when freed of the stock Z assembly, has a fine flat rectangular surface, ideal for attaching a universal Z assembly.

My personal interest was not in views regarding the character of the vendor, rather the product. I provided the information so that others know there are a growing number of options when it comes to plug and play ATC spindle kits for the Onefinity.

PS: Just in case someone wants to know: Strafgesetzbuch (StGB) – Bundesrepublik Deutschland § 185 – Beleidigung Die Beleidigung wird mit Freiheitsstrafe bis zu einem Jahr oder mit Geldstrafe und, wenn die Beleidigung öffentlich, in einer Versammlung, durch Verbreiten eines Inhalts (§ 11 Absatz 3) oder mittels einer Tätlichkeit begangen wird, mit Freiheitsstrafe bis zu zwei Jahren oder mit Geldstrafe bestraft. § 186 – Üble Nachrede Wer in Beziehung auf einen anderen eine Tatsache behauptet oder verbreitet, welche denselben verächtlich zu machen oder in der öffentlichen Meinung herabzuwürdigen geeignet ist, wird, wenn nicht diese Tatsache erweislich wahr ist, mit Freiheitsstrafe bis zu einem Jahr oder mit Geldstrafe und, wenn die Tat öffentlich, in einer Versammlung oder durch Verbreiten eines Inhalts (§ 11 Absatz 3) begangen ist, mit Freiheitsstrafe bis zu zwei Jahren oder mit Geldstrafe bestraft.

But this also means from the moment on you decide you want a 80 mm spindle, you have to choose between a spindle for ER-16 collets and one for ER-20 collets (bits with shank from 2 to 13 mm, including 12.7 mm (=1/2"). One question is, have you ever needed a bit with such a thick shank, or ever seen one? But this is not the only point to consider. As long it’s not a spindle with interchangeable tool holders (ATC, ATC spindles), the axle and the bearings are of different size on ER-16 and ER-20 spindles, which means the spindle differs in contruction.

With all that said, I believe any 65mm diameter spindle motor will use an ER11 collet, and you can get an ER20 size collet on the larger 80mm motors.