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New Linear Bearing-SMA8UU

Posted by shardbearer 
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shardbearer
New Linear Bearing-SMA8UU
April 03, 2012 08:36PM
I found these bearings on Zapp, looks pretty interesting for the Y axis on a Prusa/Mendel, you could bolt them directly to the bottom of your Y carriage. And very cheap at only £4.00! It says they contain a LM8UU bearing inside them too, maybe you could pull it out for use on the X and Z axes.

[www.zappautomation.co.uk]
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banthafodder7400
Re: New Linear Bearing-SMA8UU
April 04, 2012 09:14AM
Much better than the price I used on my senior design project at college! It was a laser scanner system to measure thread pitch and form of a die that cuts threads into bolts. Only about 12K for the system smiling smiley But these were the bearings we used
[www.mcmaster.com]

Ryan
Quality Engineer & Hobbyist
thingsandtrains.blogspot.com
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shardbearer
Re: New Linear Bearing-SMA8UU
April 04, 2012 07:43PM
Wow, for some reason I thought that normal LM8UUs were ~$10 a piece. Just looked, found them in packs of 10 for $20. These don't look like such a great deal anymore.
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aplavins
Re: New Linear Bearing-SMA8UU
April 10, 2012 02:34AM
Why pay for something you can print?
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NelsonRap
Re: New Linear Bearing-SMA8UU
April 10, 2012 03:26AM
aplavins Wrote:
-------------------------------------------------------
> Why pay for something you can print?

I find bearings last and are 1000 times smoother in operation than any printed bushing

__________________________________________________________________________
Experimenting in 3D in New Zealand
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Buback
Re: New Linear Bearing-SMA8UU
April 10, 2012 08:58AM
NelsonRap Wrote:
-------------------------------------------------------
> aplavins Wrote:
> --------------------------------------------------
> -----
> > Why pay for something you can print?
>
> I find bearings last and are 1000 times smoother
> in operation than any printed bushing


I'm guessing he meant the block that the bearing was in, not the bearing itself. And we could definitely print that block.
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Petrus
Re: New Linear Bearing-SMA8UU
April 10, 2012 12:38PM
Why buy linear bearings when you can print them : [www.thingiverse.com]

Well, I don't know about durability, the printer is in construction right now, but it slide smoothly.
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droftarts
Re: New Linear Bearing-SMA8UU
April 11, 2012 05:15AM
Petrus Wrote:
-------------------------------------------------------
> Why buy linear bearings when you can print them :
> [www.thingiverse.com]
>
> Well, I don't know about durability, the printer
> is in construction right now, but it slide
> smoothly.

That's probably more down to the quality of your rods: [hydraraptor.blogspot.co.uk]
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Asger
Re: New Linear Bearing-SMA8UU
April 11, 2012 09:03AM
I had to laugh pretty hard when i saw this

[www.zappautomation.co.uk]

Machined ballscrew with C7 precision? hahahahahaah, no way! it's a rolled ballscrew
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VDX
Re: New Linear Bearing-SMA8UU
April 11, 2012 09:50AM
... it's somehow misleading - only the ends are machined spinning smiley sticking its tongue out

Viktor
--------
Aufruf zum Projekt "Müll-freie Meere" - [reprap.org] -- Deutsche Facebook-Gruppe - [www.facebook.com]

Call for the project "garbage-free seas" - [reprap.org]
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nophead
Re: New Linear Bearing-SMA8UU
April 11, 2012 10:10AM
Yes I think it means the ends are machined and the screw has accuracy C7, which is nothing special.

[www.hydraraptor.blogspot.com]
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Randy
Re: New Linear Bearing-SMA8UU
January 12, 2013 05:02PM
Shardbearer,

Where did you find the LM8UU bearings for $20 per 10 pack? Thanks.

randy
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