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Printable Linear Bearing and Rail System - Draft 1

by Corwin, published

Printable Linear Bearing and Rail System - Draft 1 by Corwin Jan 29, 2010

Description

This is the first draft of a mostly printable linear bearing and a printable linear rail setup. I make no guarantees to prinability, usability, or sanity.
I don't have a 3D printer, so I can't test it myself. If you try it, let me know! If you can't make it work, let me know! I'd like to make this work, so if you'd like to help me, help me help you help me help us all by telling me about it here or on the reprap forums. The non-printable part is the recirculating 6mm balls. Note on where to get them below.

Recent Comments

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You need to reopen your files in solidworks and set the ratio to 1:1 and the units to millimeters then re export to STL. Also check the settigns when exporting you may have to set the ratio and units in there too.

And last but not least, nice work!

Hey, sorry for the confusion the version of the rail I uploaded on here and the one in that image are a little different. the holes running down the center are bolt holes, not bearing holes. The bearing balls are supposed to go in the "race track" that is formed by the parts of the carriage so that they will cycle inside the carriage. I've added a version of the rails with bolt holes to the files. When you slide the carriage onto the rail, the balls should go into the grooves in the sides of the top of the rail.

nice idea - I'm thinking of printing this, but I don't see the bearing holes (should be in the rail, right?) when I open rail.stl in meshlab. I haven't tried it in AOI or anything else.

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Instructions

Print one of each .stl file. Note: Something I just foundout. You'll need to scale the .stl files siginificantly. Solidworks exports with the belief that units are in meters for stl files (which is just plain silly). it needs to be scaled by a factor of 10^3, I believe.
Assemble bottom-to-top in the most obvious possible manner.
Fill with 6mm Airsoft BBs as ball bearings. They're pretty cheap, which is why I designed this to use 6mm balls.
Rails are intended to be printed so the triangular indent is down and the traiangular beam is up. There is clearance designed into it so that the overhanging face doesn't need to be flat for two of them to fit together.

Comments

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thecrazy on Sep 27, 2012 said:

You need to reopen your files in solidworks and set the ratio to 1:1 and the units to millimeters then re export to STL. Also check the settigns when exporting you may have to set the ratio and units in there too.

And last but not least, nice work!

mattratto on Feb 2, 2010 said:

nice idea - I'm thinking of printing this, but I don't see the bearing holes (should be in the rail, right?) when I open rail.stl in meshlab. I haven't tried it in AOI or anything else.

Corwin on Feb 2, 2010 said:

Hey, sorry for the confusion the version of the rail I uploaded on here and the one in that image are a little different. the holes running down the center are bolt holes, not bearing holes. The bearing balls are supposed to go in the "race track" that is formed by the parts of the carriage so that they will cycle inside the carriage. I've added a version of the rails with bolt holes to the files. When you slide the carriage onto the rail, the balls should go into the grooves in the sides of the top of the rail.

Corwin on Jan 30, 2010 said:

You can find 6mm plastic bearing balls mislabeled as Airsoft BBs in your local sporting goods or superstore, usually priced around 1000 for
&
lt;$10. Online they're even cheaper.

Corwin on Jan 30, 2010 said:

I noticed, I'm not sure what I should do about it. I guess I could copy it out and put it into a comment.

MarcusWolschon on Jan 30, 2010 said:

Your description text is cut off after "...around 1000 for".

MkMan on Jan 30, 2010 said:

This line of reasoning has real potential, I'd like to see it printed and improved!

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