PEM Nuts Installation

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PEM Nuts Installation

Postby techsavvy34 » Sun Jun 22, 2014 6:30 am

I'm wondering how you install the pem nuts on the laser carriage and the z lift plates? Can it be done with hand tools or a bench vise?
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Re: PEM Nuts Installation

Postby greenvandan » Sun Jun 22, 2014 2:21 pm

I would go with bench vise, even better an arbor press if you have access to one.
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Re: PEM Nuts Installation

Postby rsm5178 » Tue Jun 24, 2014 3:41 pm

make sure you do not crush the floating PEM. I used a smaller socket to press on the actual nut.
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Re: PEM Nuts Installation

Postby ww_kayak » Fri Feb 06, 2015 6:47 pm

Are the PEM nuts really necessary with 1/8" 6061? Or is this just a way to avoid tapping?
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Re: PEM Nuts Installation

Postby reeser » Fri Feb 06, 2015 8:33 pm

I think the nuts are necessary. The idea is that they "float" in their housing. I think this is designed to eliminate possible binding by allowing the nuts to move a little bit.
As a previous poster suggests , a socket over the nut is needed to keep from crushing the housing. I used an arbor press, which probably gives a little more control than a vise, although a vise would probably work.

Dick
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Re: PEM Nuts Installation

Postby rsm5178 » Mon Feb 09, 2015 3:12 am

You surely want the PEM nuts.

First, you want at least 3 threads engagement. Second you don't want steel on aluminum contact (especially for the z axis). Third, you want the planar and angular tolerance relief as reeser mentioned.

Rich
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Re: PEM Nuts Installation

Postby ww_kayak » Mon Feb 09, 2015 3:34 am

Makes sense, Thanks
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