Originally shared by Adafruit Industries NEW PRODUCTS – Supported Slide Rail – 15mm wide –

Originally shared by Adafruit Industries

NEW PRODUCTS – Supported Slide Rail – 15mm wide – 500mm long / 15mm Slide Railing Platform – Larger Size / 15mm Slide Railing Platform – Smaller Size
http://adafru.it/dnw

Do the CNC electric-slide! To the left, now to the right. Now you have no excuse for not building that CNC robot.

NEW PRODUCT – Supported Slide Rail – 15mm wide – 500mm long:

This is a ‘supported style’ 15mm wide slide rail makes adding linear motion control easy. This product is the slide rail itself only, it works perfectly with our 15mm Diameter Rail Smaller Slider and the 15mm Diameter Rail Larger Slider. Made of a precision stainless-steel precision railing. It is possible to cut it down to any size but you’ll need tools that can cut hardened stainless steel.

The stainless steel rail is strong and straight but works best if bolted down. There are holes in the base for easy attachment to any metal or wood surface. Unlike our rounded rail, this style can support a platform of maybe 5 lbs without needing another support. For best stability, you’ll want two of these and then two or more rail sliders for support. Note that these are ‘hobby’ grade slide rails, the slider only moves with force applied, such as a motor! They are pretty good quality and suitable for DIY robotics projects, but they’re not going to have the same smooth action as high-grade (several $100) machine components.

Do not try to attach either slider onto the rail without the plastic insert! The insert keeps the ball bearings in while you fit the slider on. See the photos for more details on how to do this! If you lose a ball bearing or two, it’ll still work but its best to keep them all in!

In stock and shipping now!

NEW PRODUCTS - 15mm Slide Railing Platform - Larger Size / 15mm Slide Railing Platform - Smaller Size

Make your robot or CNC move on our 15mm Supported Slide Rail with these sliding ball-bearing platforms. There is a larger size and a smaller size slider. Both sliders have four holes tapped for M4 machine screws so you can attach pretty much anything you want. The sliders have a plastic interior with circulating ball bearings to make it slide smoothly along the railing.

The platform won’t come off the railing once attached. It’s also fairly well supported due to the T-shaped rail, so for ~5 lb loads you can probably get away with just one rail. Often times, CNC projects will have two of these on opposite sides of the machine body to support a larger platform. You can also have some other support mechanism of your own devising.

Comes as a single bearing platform. You’ll want to pick up at least one 15mm railing as well. We have a bunch of bearings, supports and platforms that you may want to use so check out our CNC category!

Do not try to attach onto the railing without the plastic insert! The insert keeps the ball bearings in while you fit the slider on. See the photos for more details on how to do this! If you lose a ball bearing or two, it’ll still work but its best to keep them all in!

In stock and shipping now!
Larger: http://adafru.it/dnB
Smaller: http://adafru.it/dnC

Too bad there isn’t enough info there to design with. No drawings or even a hint of capacities. I’m not going to buy the thing just to see it it will fit into my design.

I’ve been checking out prices of similar bearings/rails (usually sold as sets) on aliexpress recently. These aren’t the best prices, but they’re not the worst either.

What’s the quality of those rails on Alibaba? They very well could be the exact same product/manufacturer… @Limor_Fried needs to make a profit :wink:

I found 3 rails (600mm) and carriages for 130$ http://www.aliexpress.com/item/Free-Shipping-Kossel-Mini-3D-MGN12-12mm-miniature-linear-slide-3pcs-12mm-L-600mm-rail-3pcs/1503834585.html

@Nick_Benik_HackerCEO Do you recommend 2 platforms per rail or 1 is enough? I’m thinking either 2 smaller platforms or 1 large platform, or perhaps even 2 large platforms. I just don’t want any lateral play (wobble). Thanks.

@Evan_Nguyen , The number of carriages determines rigidity, not clearance. This sort of bearing should have preload instead of clearance, but I can imagine low quality bearings having loose enough tolerances that either could be possible. For the various applications in a RepRap, the other parts of the system (printed parts and so on) will probably dominate rigidity. So, in the absence of slop in these bearings, you can probably think of them as perfectly rigid in a printer application. The only exception to that would be a large cantilevered bed. I’d use two blocks there. Manufacturers like THK and SKF have good tech sections in their catalogs that will explain all the necessary concepts.