SBR? rail cross slide

[PeterT]

Any of you CNC project guys know of suppliers of these kinds of linear slide rails, or does everyone just shop China via Ebay etc? Not sure I have the terminology right. I'm interested in the kind like pic where the circular section guide rails are supported to underlying base (as opposed to cantilevered unsupported extending from end blocks). Not interested in motorized but do want the ballscrew/handle type feature. Any forums where stuff like this comes up new in case hairbrained idea doesn't pan out? Guessing 300mm size would be about right.

 

[DavidR8]

I'd look at Automation Direct

https://www.automationdirect.com/adc/shopping/catalog/power_transmission_(mechanical)#sort=undefined%20asc&start=0

 

[Johnwa]

@PeterT are you looking for the whole assembly or just the rails. A pair of sbr20x300 is about $50 on Amazon.com.

 

[PeterT]

Or maybe this style with rectangular slides - although they seem to be more expensive for same travel size

 

[PeterT]

@PeterT are you looking for the whole assembly or just the rails. A pair of sbr20x300 is about $50 on Amazon.com.

yes with the leadscrew assembly

 

[DavidR8]

Or maybe this style with rectangular slides - although they seem to be more expensive for same travel size

This looks almost exactly like the Z axis on my router.
Pair of HGR rails and blocks
Ball screw and nut
Some 1/2" aluminum and you're good to go.

 

[PeterT]

Thanks David. In general terms are the round rail considered more rigid / less deflection than the rectangular, or maybe there is more to it than that in the specs somewhere?

 

[DavidR8]

The square rails are generally considered to be more accurate and rigid than the round rails.

 

[PeterT]

300mm model goes for 930 CAD & no lead screw, ouch. Probably high quality stuff here but outside $ scope

https://www.automationdirect.com/adc/shopping/catalog/power_transmission_(mechanical)/linear_motion_slides_and_actuators/linear_slides_-a-_accessories_-_undriven/undriven_linear_slides/lahp-33tm310sf

 

[Johnwa]

This one came up on a Cnc group

148.51C$ |Free Shinping 50-800mm Effective Stroke Sfu 1204 1605 1610 Ballscrew 16mm Linear Guide Slide Motion Rail Table Cnc 3d Printer - Linear Guides - AliExpress

Smarter Shopping, Better Living! Aliexpress.com

www.aliexpress.com

 

[PeterT]

good lead @Johnwa thanks