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The SBR20-800mm Linear Rail Kit by CNCMANS features two 800mm carbon steel rails paired with four high-precision ball bearing blocks housed in aluminum alloy. Designed for smooth, low-friction linear motion, this fully supported shaft guide includes all mounting hardware and tools for easy installation. Ideal for professional-grade CNC machines, 3D printers, and automation equipment, it delivers durable, rust-resistant performance with a self-aligning four-point contact design to ensure stability and longevity.
| Asin | B09NBP51LG |
| Bearing Number | 4 |
| Bearing Type | Ball Bearing |
| Best Sellers Rank | #80,251 in Industrial & Scientific (See Top 100 in Industrial & Scientific) #69 in Linear Motion Guides #10,598 in 3D Printer Parts & Accessories |
| Brand Name | CNCMANS |
| Compatible Lubricant | Grease |
| Customer Reviews | 4.2 4.2 out of 5 stars (70) 4.2 out of 5 stars |
| Item Thickness | 20.2 millimeters |
| Manufacturer | CNCMANS |
| Material Type | High-quality carbon steel, Bearing steel with aluminum alloy housing |
| Model | U31A20714J |
| Number Of Items | 1 |
| Outside Diameter | 20 millimeters |
| Part Number | U31A20714J |
| Upc | 730759598632 |
User
Fattening sled
Slides very smooth and works perfectly.
User
Smooth glide
Nice rails & they run smoothly
User
Works fairly well.
Works pretty good so far. Not too hard to align. Fairly smooth.
User
Poor support
Product was fine, but I am missing the end alignment dowels which wasn’t a big deal because I am not in a rush. Reached out to the manufacturer for resolution with no response. When you purchase anything a big part of quality is support. That’s why they received one star.
User
Linear rails and bearings
Installed these rails on my concrete plasma machine and so far they work s long as you make sure that no debris get into the bearings.
User
Awesome
These worked great for my project!
User
works as advertised.
very hefty rails no bending under the weight of a plunge router and my weight reaching over the work piece. they a bit noisy and probably could use more grease but that would cause too much dust buildup. came with hardware screws and a stopper handle but still had to purchase more since they were to long for my application. as a side note i accidentally purchased the wrong size and were too short to complete the task but worked as advertised. very satisfied with this prodcut.
User
Great rails but with just a little bit of flex
Great rails but with just a little bit of flex. I used these for a router sled. There were two drawbacks. The first was hunting for the correct screw size of the holes on the mounting blocks. (Metric6 by the way) The second if a little bit of flex in the rails. For a full size router I may have to go back and add some steel underneath the rails so they don't sag.
Trustpilot
2 months ago
1 month ago