t-slot mounted linear ball bearings

I'm trying to build an extruded aluminum RepStrap, and I'm looking for linear ball bearings that attach on one side to the t-slot aluminum.

Basically, I'm looking for the bearings used in the T-Rep 3 by bothacker (seen on the linear stage here: [www.flickr.com]). I tried contacting Tim, but haven't heard back.

I'd really appreciate any advice on where to find similar bearings, or even what they're called (most of the ones I find mount using pillow blocks, which need to attach on both sides).

Thanks!

This project was just funded thru KickStart.

[www.makerslide.com]

I just might solve your problem.

Bob Teeter

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Bob Teeter
"What Box?"

Very nice Bob!
That could solve a whole lot of problems for a whole lot of people.

Maybe, although I don't trust aluminum extrusions as a bearing surface.

My guess is that almost all of their mechanical components are sourced from Misumi. The pillow block bearings in the T-Rep 3 would then be one of these: Misumi pillow block bearings

Guys - Barton Dring is the fellow doing this and he is the guy who has the DIY laser site. I think that he and his group have enough knowledge about wear and such for these rails. The wheels that he uses are v-wheel running on a v-rail. The wheels surface is made from delrin. Any questions about the system is answered in his forum on this:

[www.buildlog.net]

Bob Teeter

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Bob Teeter
"What Box?"

The M-300 Universal Laser cutter has Aluminum V rails with rubber wheels that sit in the V slot.

It is an old Lasrer cutter >10 years It has just had its worn rubber wheels replaced the Aluminum V rails still have the black anodized finish it is not worn.

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Bodge It [reprap.org]
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BIQ Sanguinololu SD LCD board	BIQ Stepcon	BIQ Opto Endstop
BIQ Heater Block PCB	BIQ Extruder Peek clamp replacement	BIQ Huxley Seedling
BIQ Sanguinololu mounting	BIQ standalone Sanguinololu or Ramps mounting	Print It Stick It Cut it

My rep strap: [repstrapbertha.blogspot.com]

Buy the bits from B&Q pipestrap [diyrepstrap.blogspot.com]
How to Build a Darwin without any Rep Rap Parts [repstrapdarwin.blogspot.com]
Web Site [www.takeaway3dtech.com]

I suppose I'm more concerned about straightness and repeatibility. Although aluminum extrusions are quite straight, it can't compete with centerless ground steel shafts. In my opinion straightness is important for a reprap, where print layers can be as thin as 0.2mm.

JIS tolerance requirements for aluminum extrusions allows for 0.1mm deviation in flatness, 1 degree of twist per 300mm length, and 0.3mm of bending per 300mm length.

Personally, I would be concerned about that in a 3D printing application, although some people might think differently. I think if you're the kind of person willing to go as far as building a machine like the T-Rep 3, those tolerances may not be adequate for linear rails.

Edited 1 time(s). Last edit at 06/18/2011 02:10PM by jbayless.

You may want to check out our new OpenRail project.
Open Rail is a open source linear V groove rail system made from extruded aluminum with type III hard coating.
Its been funded and production it staring up soon after testing ><
Hope this helps

Kickstarter
[www.kickstarter.com]

Thingiverse
[www.thingiverse.com]

OpenRail Page (work in progress)
[www.Openrail.net]

What makes it even better is you're less than an hour away. Are you opening a shop in Glassboro? That would be fantastic. Will definitely be sourcing through you for my eventual CNC table (down the road a piece yet).



kram242 Wrote:
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> You may want to check out our new OpenRail
> project.
> Open Rail is a open source linear V groove rail
> system made from extruded aluminum with type III
> hard coating.
> Its been funded and production it staring up soon
> after testing ><
> Hope this helps
>
> Kickstarter
> [www.kickstarter.com]
> ail-open-source-linear-bearing-system
>
> Thingiverse
> [www.thingiverse.com]
>
> OpenRail Page (work in progress)
> [www.Openrail.net]
>
> [s3.amazonaws.com]
> 501710115c93813dc450165fdc561_large.JPG?1339022777
>
> [thingiverse-production.s3.amazonaws.com]
> ders/c0/7e/9d/7c/c5/OPENRAIL_14a_display_medium.jp
> g

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- akhlut

Just remember - Iterate, Iterate, Iterate!

[myhomelessmind.blogspot.com]

The Openrail project is interesting, but if I may ask, why are you bothering with aluminum as a rolling surface? You could as easily attach steel bar stock as using hardened aluminum bar stock for the rails, with far less concern about long-term wear.

Edited 1 time(s). Last edit at 08/15/2012 11:57PM by xiando.

for the op Link

Edited 1 time(s). Last edit at 08/16/2012 01:14AM by anode505.