Pratt Burnerd collets and closer for Chipmaster - finally!!

I agree 100 percent these collets are the shizz. I have a set with a d1-4 chuck and I love mine
 
Egad! I didn't notice you paid only 320 USD. That's not even half of what I paid for mine.
David
 
rcflier said:
Yes, it would've a bargain at twice the price. Which leads me to screamin': You Suck! (big compliment).

The set looks new. At least hardly used. You were very smart not to haggle and just say gotcha.

Cheers
Erik
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Thanks Erik. I missed you this Summer. We were in Poland but I will call you as we havn't spoken in a while. I have learned to strike while the iron is hot and not be too cheeky with haggling if the price is already good. The chap said I called within 10 minutes of him putting out the ad!

old_dave said:
Egad! I didn't notice you paid only 320 USD. That's not even half of what I paid for mine.
David
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Yeah.... my wife still seems to think they were expensive though. Makes me feel good knowing I got a deal!

Paul.
 
Hi Paul. Let's write some. Please PM or email me. I haven't been on Skype for a long time. I think I have forgotten my password.
I'd like to know what's happened. We went to Norway this summer also, so now we'll wait a few years. It's not inexpensive.
If I had been quick and adventurous, I might've been the proud owner of an ultralight aeroplane. But I had to do a little research,
and someone else beat me to it.
 
Nice looking machine you got there Paul. I just bought a metric Chipmaster a couple of weeks ago. Mine is in great condition, but not quite as good as yours. I haven't used it yet, as my electrical mate has to build a phase converter for me. It's a 3 phase machine that I intend running off 240v. Anyway to your collets and closer. I am after a set of PB multisize EC collets. I have seen photos of 2 diferent designs of closer, one that operates with a chuck key, and the lever type like yours. Regarding the key type.....I assume the more you turn the key the smaller the component the collet is able to grip. Again regarding your lever type I am guessing.........the lever actuates the grip and release mechanism, but how do you adjust the collets to grip different size components within the collet range? Regards, Ian ( UK )
 
Hello Ian :)

I have the chuck key type, much like a drill chuck. The key does, indeed, compress the collets to clamp the part, but you still need a full set of collets to achieve the holding range of the chuck. Each collet can hold from a minimum and up to a maximum within it's range of about 1/8".

For example, the smallest size in the set... EC2 will hold a part anywhere from 1/16" to 3/16". EC3 will hold from 1/8" to 1/4". EC4 will hold from 1/4" to 3/8" and so on.... The taper within the chuck compresses the blades in the collet, but the blades remain parallel with the part.

The most obvious difference is the speed of swapping out parts, when comparing the two types.

Brian
 
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samthedog said:
To think I nearly sold off my machine a few months ago. Absolute foolishness. With the combination of HP, speed, features and accuracy - the Chippie is one of the best spec'd small machines for the serious hobbyist or professional needing a small industrial lathe. I'm glad I woke up to myself.

Paul.
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Yes, very nice machines. I have some pretty respectable iron - but if a Chippie came available in my area, I'd be sore pressed to let it pass.
 
Nice. I have a pratt burnerd EC collet chuck also. I like it when I am dealing with making parts and using longer stock. I don't like that they don't hold well if you want to hold a short piece but you can sometimes overcome that by placing a similar diameter piece deeper in the collet.
 
Thank you very much for your reply Brian. I have pretty much made up my mind I would prefer the lever type closer, but if the key type pops up first I will probably buy it, then sell it when a lever type becomes available. With the key type though.......when you release the collet to remove a component and replace it with another similar sized component, how much do you have to rotate the key to grip the component please?
 
It only takes a quarter turn or so to loosen, and the same for retightening another part of the same size. Not nearly as quick as the lever type closer, but I just do this for a hobby, so I use what I have.

Brian :)
 
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