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11th Jun 2019, 09:05 PM #16Senior Member
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- jilliby nsw
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[QUOTE=BaronJ;1951934]Hi Hpa1, a name would be nice !
Haven't worked out how to change hpa1 to "Ian" yet, but still looking lol
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11th Jun 2019, 09:11 PM #17Senior Member
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- Feb 2009
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- jilliby nsw
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- 71
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11th Jun 2019, 09:21 PM #18Most Valued Member
- Join Date
- Apr 2012
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- Healesville
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- 2,129
I use a straight shank er chuck for the lathe, i think i have 3 of them in various sizes.
This saves me removing the 4 jaw chuck and the stock fitted in the er chuck is dialed in and i get good repeatability
even with dodgy chinese collets.
Straight shank er chucks have a hollow shank so being able use long stock is also a plus.
cheers, shed
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11th Jun 2019, 09:25 PM #19
Hi Ian,
As far as I'm aware you cannot change the registered name ! You can do the same as me and add a signature and tag line.
Anyway nice to have a name, I hate not being able to address people properly.
Incidentally my name is John, but for as long as I can remember teachers at school and my parents always called me by my family name, especially if I was in bother.Best Regards:
Baron J.
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11th Jun 2019, 10:38 PM #20Member: Blue and white apron brigade
- Join Date
- Feb 2006
- Location
- Perth
- Posts
- 7,189
I got my set of metric ER32 collets from CTC tools back in 2012 (before their shipping prices went from bad to worse) and I am very happy with them.
Recently I bought their CTC ER16 precision set as they were not much more than the non precision set..
I also bought the ER32 oversize set from 21 to 26 mm - also very good see //metalworkforums.com/f65/t2007...=ER32+oversize
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12th Jun 2019, 04:02 AM #21Golden Member
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- Oct 2008
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- Cairns, Q
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- 666
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12th Jun 2019, 02:28 PM #22Most Valued Member
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- Nov 2007
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- melbourne australia
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- 3,228
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12th Jun 2019, 02:29 PM #23Most Valued Member
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- Jul 2016
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- Melbourne
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- 35
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- 1,522
I would probably want to use something where I could harden the threads, that might be taking things too far for home shop use though.
Sent from my Nokia 8 Sirocco using Tapatalk
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12th Jun 2019, 06:47 PM #24Golden Member
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- Oct 2008
- Location
- Cairns, Q
- Posts
- 666
Hi Chris,
I used a piece of fairly thin walled tube which I had in the scrap box - possibly conduit. The female threaded piece on the MT end of the drawbar and the nut on the outer end of the drawbar which is bored out to suit the drawbar diameter are silver soldered on. I used 16 TPI for the connection to the chuck because it is a fairly shallow fine thread which is very suited to an 8TPI leadscrew and does't require a large outside diameter for the female thread on the drawbar. If I had a metric leadscrew I would probably have used a 1.5 mm pitch for the same reason.
I can't see why gal water pipe would not be suitable, but if I had used gal water pipe with the extra wall thickness I would probably have put the male thread on the gal pipe and the female thread in the 5MT, otherwise clearance through my 38 mm headstock spindle hole might have been a problem.
Frank.
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12th Jun 2019, 07:31 PM #25Most Valued Member
- Join Date
- Nov 2007
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- melbourne australia
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- 3,228
Thanks Frank. I've had a play with the numbers and NB15 gal pipe will work for me. It's 21.3 OD x 16.1 ID. I think I'll use 1mm thread pitch so as not to cut too close to the ID of the gal pipe. It will limit me to 16mm stock through the drawbar, but that's a lot better than what I have now.
Chris
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13th Jun 2019, 10:26 PM #26Senior Member
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- Feb 2009
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- jilliby nsw
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- 71
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- 111
Thank you for all the comments, there is certainly some great ideas out there. Seems I will go for the ER40 collets and make a custom collet chuck for my mill and a hollow pipe drawbar & chuck for the lathe. Now will I get the metric or imperial sizes................
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13th Jun 2019, 10:36 PM #27Most Valued Member
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- Nov 2007
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- melbourne australia
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- 3,228
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14th Jun 2019, 12:09 AM #28
Hi Chris, Guys,
Actually I think that you will find that a 1/2" inch shank won't go into a 12 mm collet and the same for 1/4" inch shank cutters won't go into a 6 mm collet. I bought metric sets for mine and extra individual collets for the imperial sizes. You only need three, 1/4", 3/8", and 1/2" inch to cover the imperial sizes. These cover all the shank sizes I use.Best Regards:
Baron J.
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14th Jun 2019, 12:17 AM #29Gear expert in training
- Join Date
- Aug 2008
- Location
- Melbourne
- Age
- 34
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- 1,079
As Chris said, they have a 1mm range (unlike 5C where you really do have to have both sets), so a 1/2" shank will go in a 13-12mm, 3/8" goes in 10-9mm and 1/4" goes in 7-6mm, you just have to tighten the nut a bit further before it clamps. Did it regularly on the CNC at my old job and never had holding issues. That's not to say don't get imperial sizes as well, you just don't have to.
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14th Jun 2019, 01:03 AM #30Senior Member
- Join Date
- Aug 2007
- Location
- Saskatoon, Saskatchewan, Canada
- Posts
- 292
The ER series collets were designed for tool holding where the 5C collets are meant for work holding in lathes. They aren't good at tool holding in milling machines. I've never heard of anyone using them in a mill to hold cutters but I suppose there are exceptions. The 5C does have the advantage of collets that come in round, square, hexagonal and machinable that you can shape to fit the work. You can also fit depth stops in them for repetitive operations like parting to length. 5C also fit a variety of holders, like spin indexers, enabling parts to be milled. As far as I know there are no ER setups to do as much. I do think if a new system were to be designed today for work holding it would be a blend of the two types. I have a 5C chuck for my lathe that fits the D-5 spindle nose and chose it over the drawbar types because it didn't require any modifications to fit the lathe and it is easy to mount/remove. It uses a chuck key to open/close and I wish I had sprung for the much more expensive hand wheel type. There are no ER collet chucks that I know of that have the D-5 mount or I might have gone that route. For all round hobby use the ER system is probably better.
Pete
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