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R8 collet brands - seeking just a little advice

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cazclocker

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#1
Just wondering, is Lyndex considered a good brand of R8 collets? I need a 5/16" to insert my tramming fixture (for my LMS MiniMill), and I'd like a collet with as good runout specs as I can afford, at least for that one collet. My mill came with 7 R8's, from 1/8" to 3/4" in even 1/8" steps, so there's no 5/16" in my set. Also, I'm assuming the collets that came with my mill are probably Chinese or Taiwanese imports - for tramming I'd like to get a good quality 5/16" R8 collet.
Is there some other brand that you experienced guys know about, besides Lyndex?
Thank you in advance,
...Doug
 

astjp2

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#2
Lyndex is offshore but probably acceptable for your application. Put a 5/16 drill or precision pin in it and check the run out first before installing the tool. Tim
 

cazclocker

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Lyndex is offshore but probably acceptable for your application. Put a 5/16 drill or precision pin in it and check the run out first before installing the tool. Tim
Thank you, Tim. I wonder where Lyndex is made? Are there any USA-made R8 collets that are known to be of good quality?
 

old_dave

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#4
Just wondering, is Lyndex considered a good brand of R8 collets? I need a 5/16" to insert my tramming fixture (for my LMS MiniMill), and I'd like a collet with as good runout specs as I can afford, at least for that one collet. My mill came with 7 R8's, from 1/8" to 3/4" in even 1/8" steps, so there's no 5/16" in my set. Also, I'm assuming the collets that came with my mill are probably Chinese or Taiwanese imports - for tramming I'd like to get a good quality 5/16" R8 collet.
Is there some other brand that you experienced guys know about, besides Lyndex?
Thank you in advance,
...Doug
A Hardinge R 8 collet in this size is $41.00, or about $10.00 more than MSC's price for a Lyndex collet. See: http://www.shophardinge.com/search.aspx?str=R8 collet

To my way of thinking, while Hardinge collets aren't cheap. sometimes they are not all that much more than some of the alternatives. And they are easy to buy online from Hardinge (they take credit cards). David
 

Arkie

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#5
Lyndex is offshore but probably acceptable for your application.
Interesting. I always assumed they were a USA company because in my Enco catalog it gives a choice between import and Lyndex. I went to their website and it appears they have a factory in Japan, and warehouse in the US. From the website I really can't tell where their stuff comes from.

I should do more research before spending dollars.
 

Cheeseking

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My personal preference are the old school Bridgeport collets with the name/ size stamped vs etched into the face. One pc construction. Newer ones have the threaded end pressed and staked in.
They are hard to come by but sometimes you get lucky on ebay or CL or industrial auction.
If you don't want to mess around looking for antiques, I think the Hardinge or Crawfords are your best bet.
 

darkzero

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#9
Lyndex is offshore but probably acceptable for your application.
I was always under the impression that Lyndex is one of the higher quality brands. This is the first time I heard of Lyndex being considered anything less.

As the others said, Lyndex is Japan & they aren't cheap. I don't have any collets from them but I do have 2 ball bearing ER collet nuts & they are very nice.
 

cazclocker

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Well, I just bought a Lyndex 5/16" R8 on eBay for about $20.00. At .0007" TIR, I figure that will be good enough for my purposes. But, I've made a note about Crawford collets. Thanks everyone!
...Doug
 

d.brown

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Well, I just bought a Lyndex 5/16" R8 on eBay for about $20.00. At .0007" TIR, I figure that will be good enough for my
purposes./QUOTE]

That sounds like a lot. Lyndex are excellent quality.....did you buy new or used?

David
 

cazclocker

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Well, I just bought a Lyndex 5/16" R8 on eBay for about $20.00. At .0007" TIR, I figure that will be good enough for my
purposes./QUOTE]

That sounds like a lot. Lyndex are excellent quality.....did you buy new or used?

David
A fair question...the eBay listing that I purchased said it was brand new, and offered free shipping. The price was $19.95.
 

george wilson

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I can't recall where I read it,but i remember that Lyndex's aren't what they used to be.
 

d.brown

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A fair question...the eBay listing that I purchased said it was brand new, and offered free shipping. The price was $19.95.
Since replying last night, I decided to do a little further checking. My Lyndex R8 collets average about .0002 run out (I checked 3) & that's about the same as my spindle run out. Have you checked for spindle run out? The boxes are marked Made in Japan but there is no guarantee that they are not outsourcing too. It makes it hard to buy when you can't rely on country of origin/quality. The price of good quality tooling is a killer but .0007 won't do. If your spindle checks out, I would return the collet for a refund.

David
 
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george wilson

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#17
I must have had good luck with my Chinese or Taiwan collets. I have only ever bought 1 that wasn't quite true. And it had about 1/32" runout!!

I will warn that I think the Asians CAST EVERYTHING. My journeyman broke a #3 MT to R8 adapter. It was definitely cast from the rough fracture on it. I don't know if they cast R8's. I've never broken one,but if it is possible to cast them,I'll bet they do it.
 

EmilioG

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#18
Question on R8 collets: Why do some r8 round collets have a step that prevents full insertion of a tool? I bought some Hardinge r8 collets for a low price in great condition and you can insert a tool as far as the collet is long, no restriction on shank length, which is great. While others have a step that prevents or limits the depth that you can insert a tool. Are these r8's what they call stepped collets?
 

Eddyde

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#19
Question on R8 collets: Why do some r8 round collets have a step that prevents full insertion of a tool? I bought some Hardinge r8 collets for a low price in great condition and you can insert a tool as far as the collet is long, no restriction on shank length, which is great. While others have a step that prevents or limits the depth that you can insert a tool. Are these r8's what they call stepped collets?
 
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