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Re: Making an ER40 Collet Chuck

 

Glenn sticking 1018 in water will not harden its a waist of time

GP


On Thursday, April 23, 2020, 9:02:06 PM EDT, Glenn N <glennsneff@...> wrote:


For hobby use, as hard as you can get it...When you are almost done with the taper, heat it to 1500F* and quench in water. Then grind the finish taper. First thing you should do IMO is make an 1 1/2 8 spindle plug that matches your spindle really close. Then when you turn the spindle end and thread it you can test the fit with your threaded plug. I made mine out of aluminum because I had it but ...
Glenn
From: Jody [mailto:jp4lsu@...]
Sent: Thursday, April 23, 2020, 5:18 PM
Subject: [atlas-craftsman IO] Making an ER40 Collet Chuck

So I went by the metal store by the house and picked up a 3" 1018 round bar drop off for a few bucks.? Very little round bar to choose from so I grabbed a piece of what they had since its only a few bucks.

I believe I should be able to get this heat treated afterwards.? ?I'll have to see what sort of hardness it? an provide.

I have no idea how this will machine.? I'll give it a spin.

So what sort of hardness is needed for a? collet chuck.
-Jody

Sent via the Samsung Galaxy S10+, an AT&T 5G Evolution capable smartphone


-------- Original message --------
From: Guenther Paul <paulguenter@...>
Date: 4/23/20 4:00 PM (GMT-06:00)
Subject: Re: [atlas-craftsman IO] Making an ER40 Collet Chuck

A collet chuck needs a hardened surface where the collet"s contact the taper of the chuck. You can use a oil hardening steel or water hardening. Make sure you do it properly and watch the colors of the steel when you dunk it in. I can walk you thru the process but i need to know the type of steel

GP


On Thursday, April 23, 2020, 4:38:15 PM EDT, Andrei <calciu1@...> wrote:


Oops. forgot about the collets being hardened and the cast iron, vastly less so. Thanks?GP
From: [email protected] <[email protected]> on behalf of Guenther Paul <paulguenter@...>
Sent: Thursday, April 23, 2020 4:34 PM
To: [email protected] <[email protected]>
Subject: Re: [atlas-craftsman IO] Making an ER40 Collet Chuck
?
A collet chuck needs to be made from tool steel not cast iron. The collet will dig in to the cast iron. Its a no no

GP


On Thursday, April 23, 2020, 4:16:05 PM EDT, Andrei <calciu1@...> wrote:


1 foot long piece of 4.25" cast iron is 106 bucks at mcmaster. yuo need this diameter to finish at 100mm for your chuck.

1144 is only available in 3" max diameter, so your options may be limited in using this.?
From: [email protected] <[email protected]> on behalf of Andrei <calciu1@...>
Sent: Thursday, April 23, 2020 4:07 PM
To: [email protected] <[email protected]>
Subject: Re: [atlas-craftsman IO] Making an ER40 Collet Chuck
?
Cast iron is always a good (but messy) option. You can order a slice of various diameters from McMaster Carr. This is a company that never disappoints, until your check your bill ?. Their products are top notch, selections are wide and deep and they are delivered quickly. The prices match the quality of product and service. I have never hesitated buying from them.?

Best Regards,
Andrei D. Calciu
6371 Birch Leaf Court
Burke, VA 22015-3528 USA
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703-995-4822 (landline and Fax)
571-436-0169 (mobile)
mailto:calciu1@...
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From: [email protected] <[email protected]> on behalf of kaje7777 <kevin.quiggle@...>
Sent: Thursday, April 23, 2020 4:00 PM
To: [email protected] <[email protected]>
Subject: Re: [atlas-craftsman IO] Making an ER40 Collet Chuck
?
Jody - Regarding your question about stainless for your project: I have not had much experience working with stainless, but what little I have had has all been bad. This may say more about my fairly limited machining experience than anything else, but I found work hardening to be a real problem.

Take a look at this chart for some idea of how easy it is to machine various metals:



You might consider 1144 stressproof. You can look up various alloys on SpeedyMetals and get more information on typical uses.
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