what diameter of the shaft ?

20mm - after I received it, I figured out that the last number in the model # is the diameter.

What is the difference between the SBR12, SBR16 and SBR20 models?

I believe the difference is the diameter of the rails in millimeters.

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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VEVOR Linear Guide Rail Set, SBR16 800mm, 2 PCS 31.5 in/800 mm SBR16 Guide Rails and 4 PCS SBR16UU Slide Blocks, Linear Rails and Bearings Kit for Automated Machines DIY Project CNC Router Machines

Product ID: 492392538

Details

Bearing Type
Linear Bearing
Brand
VEVOR
Item Weight
3.9 Kilograms
Item dimensions L x W x H
31.5 x 3.15 x
Material
Alloy Steel

🔩Static Load: 1180 N

⚙️Dynamic Load: 774 N

🛠️Length: 800 mm

Description

🚀 Elevate Your DIY Game with Precision Engineering!

DURABLE DESIGN - Crafted from high carbon steel and aluminum for long-lasting performance.
SMOOTH OPERATION - Enjoy low noise and frictionless sliding with built-in ball bearings.
EASY INSTALLATION - Accurate mounting holes ensure a hassle-free setup.
PRECISION ENGINEERING - Experience unparalleled accuracy with precise circular shaft dimensions.
VERSATILE APPLICATIONS - Perfect for CNC machines, 3D printers, and DIY projects.

The VEVOR Linear Guide Rail Set features two 800 mm SBR16 guide rails and four SBR16UU slide blocks, designed for high-load automation and DIY projects. Made from durable carbon steel and aluminum, this set ensures smooth, low-noise operation and high precision, making it ideal for CNC routers, 3D printers, and more.

Specifications

ASIN	B0BLSD7K5R
Batteries Required?	No
Colour	silver white
Customer Reviews	4.8 4.8 out of 5 stars (30)
Date First Available	10 Nov. 2022
Guaranteed software updates until	unknown
Included components	4 x SBR16UU Sliding Blocks
Item Package Quantity	1
Item Weight	3.9 kg
Item model number	SBR16-C 800L
Manufacturer	VEVOR
Material	Aluminium, High Carbon Steel
Part number	SBR16800MM
Product Dimensions	80 x 8 x 3.22 cm; 3.9 kg

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