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Why is it hard to find an ER11 collet chuck with a 2MT shank?

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GizzieDude

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#1
Total noob here, I am looking to make use of ER11 collets for turning very small things for models. My lathe has a #2 Morse Taper at the headstock, but for some reason I am having a hard time finding an ER11 collet chuck that will fit. All the ER11 available domestically have a straight shank (for milling, I presume). I have cheked all the major US online retailers. I have found one for sale overseas, but that comes with extra shipping.
Then it occurred to me that maybe the reason I am having trouble finding them. Maybe it's a bad idea to use ER11 on a lathe? Or maybe there is a different big picture reason that my noobness prevents me from seeing? Maybe #2MT is an unusual size? Or maybe I am looking in the wrong place?
Any insight is appreciated.

Chris
 

benmychree

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#2
Perhaps the #2 mt is too small to be stiff enough to be practical. A rational approach might to be to make an collet adaptor that could screw onto the spindle nose, or a two piece affair that could consist of a backplate to screw onto the spindle, then a collet adaptor that would be mounted to the backplate with bolts parallel to the spindle and adjusting screws to center the adaptor, such as is used on the Buck Adjustrue chucks.
 

JimDawson

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#3
As near as I can find China is the only place you can find them. I do wonder how well they would hold in the spindle without a draw bar. Morse tapers don't like to be side loaded, they tend to try to work their way out.

Maybe a 5C collet chuck would be a better option. Also you could hold an ER11 straight shank holder in your chuck.
 

stupoty

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#4
A lot of times collet chucks for lathes are the type with a through hole, the ones with shanks are as you say more often used on milling machines for holding tools.

A smaller er holder can be useful when requiring clearance for getting in tight with a small end mill.

On a lathe an er32 would hold down to 1mm diameter and the nut shouldn't be an obstruction.

Stu
 

chips&more

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#5
What kind of lathe do you have? What is the headstock mounting spindle?
 

Ulma Doctor

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#6
you can use an appropriate MT2 Collet and then use a straight shank ER11 holder as another way of accomplishing the same thing
 

Briney Eye

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#7
Total noob here, I am looking to make use of ER11 collets for turning very small things for models. My lathe has a #2 Morse Taper at the headstock, but for some reason I am having a hard time finding an ER11 collet chuck that will fit. All the ER11 available domestically have a straight shank (for milling, I presume). I have cheked all the major US online retailers. I have found one for sale overseas, but that comes with extra shipping.
Then it occurred to me that maybe the reason I am having trouble finding them. Maybe it's a bad idea to use ER11 on a lathe? Or maybe there is a different big picture reason that my noobness prevents me from seeing? Maybe #2MT is an unusual size? Or maybe I am looking in the wrong place?
Any insight is appreciated.

Chris
I searched for "er11 mt2 collet chuck" on eBay and had several with tangs come up. For small stuff you probably wouldn't need to use a draw bar, and could use a rod to knock it back out of the taper. There were also some that came up for me on Amazon, including one with an M10 draw bar thread.
 

pontiac428

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#8
ER11 is sized for routers and other very small capacity tools. For MT2, try ER32. You'll find lots of options there. MT2 is plenty strong to support everything in the ER32 capacity (use a drawbar).
 

magicniner

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#9
Just get a larger ER Collet on a straight shank and centre it in your 4 jaw, then hold an ER11 on a straight shank in that.
 

Moper361

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#11
You can buy er20 mt2 and mt3 from china I have several and a couple of sets of collets ,These were of Lazada but can be brought of allied press or ban good the quality is okay and no issues with massive run out .
Price was about 12 dollars US for the collet chucks each and about 24 dollars for collet set 1 mm to 16 mm
I only use Lazada as I live in Thailand and what the price is on the site is what you pay including freight and duties and is most of the time cash on delivery .but same items can be found on aliexpress
 
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SamI

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#12
Could you get a square collet block and indicate it in a 4 jaw chuck? Would have the benefit of being able to utilise the through hole for longer stock as well as being a useful fixture for drilling cross holes.
 

MozamPete

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#13
I have an MT2 ER20 collet chuck for my Myford ML7. ER20 collets go from 13mm down to 1mm diameter. It uses a drawbar so you don't get the through capacity to used long stock.

I also have a set on MT2 collets, which again use a drawbar and go straight into the taper. They don't seem very popular but logic would tell me that they would be more accurate as you have one less interface.

But I use neither now as I made a ER32 collet chuck for the lath so that is my preferred option when I want to use collets. And being ER it doesn't need the drawbar (chuck screws directly onto the spindle thread) and I get the long stock capacity.

The MT2/ER20 chuck and colllets I got off Banggood. The MT2 collets off Ebay out of a sell in Hong Kong.
 
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