Help! ER40 collet set

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I would think they are equal to Bison-TMX in quality, but could find nothing on the web. The Bison ER-40 collets are $18.00 each, so 23 would cost $414 at retail. On top of that, you'll need an R-8 collet chuck at about $120, which is not included in the eBay auction.

what would be a decent price
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That all depends on your personal level of cheapness - mine may be higher than yours, but I would try to stay under $150, as you'll spend over $100 more for the collet chuck.
 
speaking of ER40 collet chucks, I made this today:

img0276t.jpg

img0277d.jpg


When I drew the profile I was a little tight with the tolerances, so I had to file the teeths a little, other that that it works great. I had a small piece of alu sheet, maybe in the future I make an extension so I have more torque.


Pablo
 
Ajax lists a Bison er 40 chuck w/R8 for 120.

http://cgi.ebay.com/Bison-Collet-Ch...QQptZBI_Tool_Work_Holding?hash=item482f2e067f

Barry, a while back you posted about a ball bearing nut for the er 40 chuck and I can't find the post. Looks like a great idea to make a good collet set up even better. If I can find one.

I have a bid in on this set, High bidder right now, will see how it goes.

I saw those from 800 Watt, Might go that direction if this set goes too high. The bison chuck looks like a good idea either way, just a guess but that is probably the most critical area when it comes to keeping the TIR under control. Although I guess that if the spring in the spring collet is not even that could be a problen.

Thanks for the info! :wave:
 
PEU said:
speaking of ER40 collet chucks, I made this today:

img0277d.jpg


When I drew the profile I was a little tight with the tolerances, so I had to file the teeths a little, other that that it works great. I had a small piece of alu sheet, maybe in the future I make an extension so I have more torque.


Pablo
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That wrench is very nice. This was done on your CNC router? How long does it take to do everything once you give it a go?
 
Very nice wrench, Pablo :twothumbs

maybe in the future I make an extension so I have more torque.
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Most factories have a collet nut wrench with a square hole so a torque wrench may be used for uniform tightening. That's on my "round tuit" list :rolleyes:

ball bearing nut for the er 40 chuck
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Phone Vic at Rani Tool for the Lyndex BB nut - $40 I believe. He can probably get the Lyndex R-8 ER-40 chuck with BB nut, but I never asked about a price on that. Lyndex is very nice. You might also want to ask the price for a set of ER-40 collets.

http://www.lyndexnikken.com/prod_standard.asp?type=colletchuck

(the collet chuck) is probably the most critical area when it comes to keeping the TIR under control.
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Runout is generated in both the chuck & the collet itself. If the collet pocket to OD is not perfect, runout occurs. If the collet taper to collet bore isn't just right, it also generates runout. Both should be as close to perfect as possible because (even though we aren't making parts for the Space Shuttle) lower TIR results in greatly increased tool life.

The very best ER chucks guarantee .0001" runout between the collet pocket & the shank OD. Ultra precision ER collets guarantee .0002". That figure (.0003") is the gold standard for ER collets.

Very good chucks run .0002" & very nice collets run .0004", for a TIR of .0006". While that sounds good enough for Government Work, tool life will suffer. Every .0001" improvement in TIR increases tool life by a minimum of 10%, so that small difference in TIR makes a large difference in tool life.

I bought an expanding lathe mandrel for a job last summer - the arbor has a slight taper that matches the ID of the expanding collet & the collet closely resembles the ER with the multiple slits. Brand was Full Moon Best of China (Enco) and the machining wasn't bad. But every edge was straight razor sharp, which meant that a hard Arkansas stone had to be used to break every single expansion slit. Probably took the better part of an hour to make it usable.

Buy the best collet chuck & collets that your budget will allow & you'll never regret it. The chuck & collets are the final link between the tool & the work.
 
precisionworks said:
Phone Vic at Rani Tool for the Lyndex BB nut - $40 I believe. He can probably get the Lyndex R-8 ER-40 chuck with BB nut, but I never asked about a price on that. Lyndex is very nice.
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Yup, I paid $41 or $42 for it. Mine should be arriving any day now :thumbsup:

I will call him next week to inquire about the Lyndex R8 ER-40 chuck :broke:
 
wquiles said:
That wrench is very nice. This was done on your CNC router? How long does it take to do everything once you give it a go?
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It was done with my SX3 CNC mill, to use the most of the alu sheet I had to use a sacrificial board as support and as many holes I can drill avoiding the path to keep the sheet in place, it rattled a little, but this job didn't call for nice finishes :)

The cnc mill did the job in about 40 minutes, cutting was done with a 1/4 2fl carbide endmill at 300mm/min and 1mm per pass, manual oil spray every now and then and I was there all along vacuuming so chips don't build up in the endmill.

My ER40 collet set came from 800watt and ctctools, for the kind of stuff I do, its OK no complaints here.


Pablo
 
precisionworks said:
Phone Vic at Rani Tool for the Lyndex BB nut - $40 I believe. He can probably get the Lyndex R-8 ER-40 chuck with BB nut, but I never asked about a price on that. Lyndex is very nice. You might also want to ask the price for a set of ER-40 collets.
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I received the Lyndex ER-40 Ball Bearing nut - really impressive :thumbsup:

I just talked to Vic at Rani Tool (link/) and he looked, but found that Lyndex only goes up to ER-32 in the R8 chuck. I asked him about the one made by Bison (link) and he said that would be a good brand to buy, given Lyndex does not make one.

So unless you or somebody else makes a better suggestion, looks like the Bison R8 chuck would be the one to get to replace my cheap Asian one.

Will
 
looks like the Bison R8 chuck would be the one to get
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That's what I have. I don't have a tenth reading dial test indicator, so my ability to measure internal runout is limited. Using my Interapid .0005" indicator, the needle seems to move about .0001"-.0002". That is, however, as wildassguess, and someone with better metrology tools should verify my questionable readings :rolleyes:
 
Just for chuckles, I asked the local Sandvik rep for a quote on a set of Sandvik ER40 collets. Turns out, according to him, that they only have a metric set, and the price is $1558.00. :ohgeez:

He suggested a Technics metric precision set instead at $552.00--better but still expensive.
 
Who sell precision ER-40 collets individually?
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Royal Ultra Precision ER-40 collets are $25 each, also guaranteed to .0002" TIR or better. Probably the lowest price today at that level of accuracy as a set of 15 cost only $375.

http://www.royalprod.com/content/files/products/Pages_4_7.pdf

Collis also guarantees .0002", but has no pricing on their site.

http://www.collistoolholder.com/cgi-bin/items.cgi?cat=CAT_3

They also make ER-40 tapping collets that hold the square shank of a hand tap ... nice if you don't have a tapping head.
 
PhotonFanatic said:
Just for chuckles, I asked the local Sandvik rep for a quote on a set of Sandvik ER40 collets. Turns out, according to him, that they only have a metric set, and the price is $1558.00. :ohgeez:

He suggested a Technics metric precision set instead at $552.00--better but still expensive.
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The set on eBay sold for $280. I went $150 then quit.

Picked up a cheapo set like Will's from 800 Watt. Should get me by.:paypal:
 
I went with MariTool and got just the R-8 holder and three ER-40 collets that I will use virtually all the time.

It was very nicely finished. Interesting because there was NO manufacturing origin printed on the holder. No China, no nothing.....

The other main point I wish to advise anyone buying on from MariTool is unlike I think virtually every other R-8 ER-40 holder is there is NOT one spot to put a wrench on the thing to tighten the nut up against. Nothing milled on the sides at all. The nut wrench I got is beautiful and fits and works well. You just have to figure a way to "hold" the holder really good while tightening the nut. I used a good rubber glove, gave it all I had and tried it out with a 5/16 2 flute single ended end mill. It stayed put....didn't go anywhere up or down as I machined and plowed down 1/4 of an inch in aluminum. I hate to use channel locks on the darn thing.....

So I am not sure if you really need the flat surfaces that everyone else has or not. I do think I will eventually either mill a surface on there for a big wrench or do something.....haven't got that far. Any ideas?

Price was right, very right at $75 bucks and it was very, very nice machining with it.

Do you jam the end mill up as far as it goes or can you adjust you length as necessary as long as you have full coverage of the end mill being gripped by the collet?

Bob E.
 
In general, you want as little as possible hanging out of the collet while still gripping only by the shank.

I've not seen any discernible impact if I move the endmill up and down as needed.

I noticed that some of my smaller collets ( 3/16 inch, for instance) have a gripping area that only goes partway up the collet. That would tend to suggest that you can put an endmill only partway into the collet. Having said that, I can see how that might tweak the collet if over tightened.

Daniel
 
StrikerDown said:
The set on eBay sold for $280. I went $150 then quit.

Picked up a cheapo set like Will's from 800 Watt. Should get me by.:paypal:
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StrikerDown,

I want to thank you for posting the link to the Sandvik ER40 collets for sale on eBay. I know you wanted them, and so did I, but I had never heard that Sandvik made collets. I use their cutting bits and small tools a lot, and love them, so your post piqued my curiosity.

The funny thing was that I could find nothing about Sandvik having an ER40 collet set; sure, they made all the other sizes, but I just could not dig up anything on the ER40, especially in an inch set.

Nonetheless, while I really wanted a metric set, I thought I'd look in on that auction to see how your bidding was coming along. Once I noticed that you were no longer bidding, I decided it might be OK if I snuck a bid in at the last minute.

With the bidding at $250, I placed a bid $100 above that in the last ten seconds. As it turned out, I got the 'inch series' set for $280.

Now, as it turns out, Sandvik doesn't make an inch series in the ER40 collets, only a metric series, from 4 to 26mm, and that is priced at $1558 new, as I posted previously.

So, I was very curious to see if 1) the seller was ripping me off by sending an inch series that would clearly not be by Sandvik, or 2) that the collets were perhaps dual marked, inch and metric.

The package arrived yesterday, but I only got to open it today, as I was away for a day. Surprise, surprise--they were marked only in metric sizes, and do appear to be practically brand new, with a few scuff marks on some of the collets, where someone might have fit them in a chuck.

So, I don't know how to thank you enough--but if I ever decide to sell them, I'll let you have first crack at them! :devil:
 
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