What is the diameter of SBR12/SBR16/SBR20/SBR25?

Hello, their diameters are 12mm/16mm/20mm/25mm.

What material is the linear guide made of? Is it stainless?

Hello, the material of linear guide is made of carbon steel, bearing steel, and aluminum alloy for rust resistance and high durability.

Are CAD drawings available?

Hello, unfortunately we don't have CAD drawings, but we have detailed data reference drawings.

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SBR20-800mm Linear Rail Linear Rails and Bearings Kit 2Pcs SBR20 800mm Long Fully Supported Shaft Guide with 4Pcs SBR20UU Linear Bearing Slide Block Linear Guide for CNC Equipments

SBR20-800mm Linear Rail Linear Rails and Bearings Kit 2Pcs SBR20 800mm Long Fully Supported Shaft Guide with 4Pcs SBR20UU Linear Bearing Slide Block Linear Guide for CNC Equipments

Product ID: 446546074

Details

Bearing Number
4
Bearing Type
Ball Bearing
Brand
CNCMANS
Item Thickness
20.2
Material
High-quality

📏800mm precision length

🔩4 ball bearing blocks

⚙️4-point contact design

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Description

⚙️ Glide into precision — because your CNC deserves the smoothest ride!

DURABLE MATERIALS - Crafted from high-quality carbon steel and bearing steel with aluminum housing for long-lasting performance.
ROBUST LOAD HANDLING - Four-point contact design evenly distributes load, delivering high stability under heavy use.
EFFORTLESS INSTALLATION - Pre-drilled aluminum alloy supports and included wrench make setup quick and hassle-free.
PRECISION LINEAR MOTION - 800mm fully supported rails ensure ultra-smooth, accurate travel for your CNC projects.
VERSATILE CNC COMPATIBILITY - Perfect for routers, mills, laser cutters, and more—upgrade your machine’s precision today.

The CNCMANS SBR20-800mm Linear Rail Kit features two 800mm carbon steel rails paired with four high-quality ball bearing blocks in aluminum alloy housings. Designed with a four-point contact system, it offers exceptional load distribution and self-alignment for CNC machines and other precision equipment. Easy to install with included hardware and tools, this kit delivers smooth, durable linear motion for professional-grade manufacturing and DIY projects.

Specifications

ASIN	B09NBP51LG
Bearing Number	4
Bearing Type	Ball Bearing
Best Sellers Rank	#80,517 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #58 in Linear Motion Guides
Brand Name	CNCMANS
Compatible Lubricant	Grease
Customer Reviews	4.2 4.2 out of 5 stars (68)
Item Thickness	20.2 Millimeters
Manufacturer	CNCMANS
Material Type	High-quality carbon steel, Bearing steel with aluminum alloy housing
Model	U31A20714J
Outside Diameter	20 Millimeters
Part Number	U31A20714J
UPC	730759598632

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