Thanks: 0
Likes: 0
Needs Pictures: 0
Picture(s) thanks: 0
Results 1 to 10 of 10
Thread: Collett Sizes
-
5th February 2019, 09:43 PM #1GOLD MEMBER
- Join Date
- Jun 2005
- Location
- Helensburgh
- Posts
- 7,696
Collett Sizes
This link shows a spindle with an ER16 collett https://www.ebay.com.au/itm/24000rpm...sh73nzynJbXtbe
Can the collett be changed to ER20 or are spindles made to suit certain collett sizes?CHRIS
-
5th February 2019 09:43 PM # ADSGoogle Adsense Advertisement
- Join Date
- Always
- Location
- Advertising world
- Posts
- Many
-
5th February 2019, 09:54 PM #2China
- Join Date
- Dec 2005
- Location
- South Australia
- Posts
- 4,474
I am not a expert although no I believe they are made to suit one type
-
5th February 2019, 10:58 PM #3Taking a break
- Join Date
- Aug 2008
- Location
- Melbourne
- Age
- 34
- Posts
- 6,127
No, they are different sizes.
-
6th February 2019, 12:54 AM #4GOLD MEMBER
- Join Date
- Jun 2005
- Location
- Helensburgh
- Posts
- 7,696
Thanks for the confirmation.
CHRIS
-
6th February 2019, 01:16 AM #5.
- Join Date
- Feb 2006
- Location
- Perth
- Posts
- 27,786
You'll need to be careful but it's possible to fit a hold a larger collect chuck in an smaller chuck.
For example if you have a ER16 you can fit a ER20 so you can run bigger collets.
It all depends on the precision required, bit size (length/diam) and materials being machined.
I wouldn't do this on more precise milling of say steel, but cheesium, or wood is probably OK especially if the cutter speed and feed is reduced.
There's another reason for doing the reverse is smaller in larger chuck and that is so the cutter can get closer to things like shoulders.
I have several long ER16s that I mount in an ER32.
-
6th February 2019, 10:39 AM #6GOLD MEMBER
- Join Date
- May 2011
- Location
- Albury
- Posts
- 3,034
I don't claim to have the practical experience, but can't you just change the collet extension by substituting something along the lines of these -
https://www.ebay.com.au/itm/ER20-A-T...30l:rk:10:pf:0
https://www.ebay.com.au/itm/ER20-A-T...30b:rk:13:pf:0
As Bob has said the only thing to be concerned about would be a potential loss of precision.
-
6th February 2019, 12:17 PM #7GOLD MEMBER
- Join Date
- Jun 2005
- Location
- Helensburgh
- Posts
- 7,696
Not having seen two spindles or collets together my question revolved around whether the spindle shaft is sized specifically for each collet size. Are the two shafts a different ID/OD to match the collet type?
CHRIS
-
6th February 2019, 01:27 PM #8GOLD MEMBER
- Join Date
- May 2011
- Location
- Albury
- Posts
- 3,034
This is, again, as I understand it so don't take it as gospel. All of these CNC motors have a bare shaft end that the collet carrier is attached to using grub screws. The two collet carriers (extensions) that I linked to are designed for 8mm and 12mm shafts and there are probably other sizes as well. So all you need to do is remove the supplied collet carrier, establish what size is appropriate to your motor and then buy and fit an appropriate collet carrier. As long as you can find the correct internal diameter ER collet carrier you can use any size of ER collets you want, ER20, ER25 etc.
Have a look at this - https://www.cnczone.com/forums/chine...-er16-one.html - not a ringing endorsement, but
-
6th February 2019, 02:56 PM #9GOLD MEMBER
- Join Date
- Jun 2005
- Location
- Helensburgh
- Posts
- 7,696
That'd make sense Dave from a manufacturing POV, make a universal motor and put the specific collet adaptor on it.
CHRIS
-
6th February 2019, 03:37 PM #10GOLD MEMBER
- Join Date
- May 2011
- Location
- Albury
- Posts
- 3,034
I think that you'd find that as the motor went up in power and the collet holder up in size the motor would have more substantial bearings to handle the increased loads, particularly the side load. But when we're talking about machining wood and only going from ER16 to ER20 it shouldn't present any problems.
Similar Threads
-
Tight collett
By bigphill in forum METALWORK FORUMReplies: 18Last Post: 11th August 2013, 11:52 PM -
collett advice
By tanii51 in forum METALWORK FORUMReplies: 40Last Post: 10th March 2010, 10:16 PM -
brass for collett
By Jenny Brandis in forum HOMEMADE TOOLS AND JIGS ETC.Replies: 10Last Post: 13th September 2008, 10:24 PM -
Collett extentions
By Garell in forum ROUTING FORUMReplies: 8Last Post: 4th September 2008, 01:18 PM -
Collett Karma
By dazzler in forum ROUTING FORUMReplies: 6Last Post: 14th March 2006, 09:49 PM