






⚙️ Glide into precision — don’t let your CNC setup fall behind!
The CNCMANS SBR20-800mm Linear Rail Kit features two 800mm carbon steel rails and four SBR20UU ball bearing blocks with aluminum alloy housings. Its four-point contact design ensures balanced load distribution and self-alignment for high precision under heavy use. Pre-drilled aluminum supports and included hardware simplify installation. Perfect for CNC routers, mills, laser machines, and other industrial-grade linear motion applications.








| ASIN | B09NBP51LG |
| Bearing Number | 4 |
| Bearing Type | Ball Bearing |
| Best Sellers Rank | #37,700 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #32 in Linear Motion Guides |
| Brand | CNCMANS |
| Brand Name | CNCMANS |
| Compatible Lubricant | Grease |
| Customer Reviews | 4.3 out of 5 stars 170 Reviews |
| Item Thickness | 20.2 Millimeters |
| Manufacturer | CNCMANS |
| Material | High-quality carbon steel, Bearing steel with aluminum alloy housing |
| Material Type | High-quality carbon steel, Bearing steel with aluminum alloy housing |
| Outside Diameter | 2E+1 Millimeters |
| UPC | 730759598632 |
J**L
Exceptional Linear Rail Kit, smooth and precise.
Exceptional Linear Rail Kit, smooth and precise. I used this with a SpecTool Router Sled Kit. These rails precisely fit together with this sled and perform excellently. I'm very impressed with the rollability of these rails. They are smooth and durable. Overall construction is superior and resulted in a very professional router sled for my use. I am more than pleased. I did contact the seller with a couple of questions, and they quickly and accurately responded. It was a very nice experience. Highly recommended! These are an exceptional value for their high build quality and customer support.
T**S
They do what they claim.
These did what they claim they do. No issues with these so far, at all. So I ordered more as I have many uses for them.
L**X
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.
A**D
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.
T**S
Fattening sled
Slides very smooth and works perfectly.
J**R
Rail stop
Good quality, great buy
S**.
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.
A**.
Solid rails
Saved myself thousands using these rails to build a router sled. Great ball bearing action, heavy stainless rails, solid. Great choice for any heavy-duty slide applications.
Trustpilot
3 weeks ago
2 weeks ago