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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VEVOR Linear Rail Slide SBR16-800mm 2 PCS and 4 PCS SBR16UU Slide Blocks Linear Guide Rail and Bearings Kit for Automated Machines DIY Project CNC Router Machines

Product ID: 501038939

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

📏800mm precision rail length

⚙️4 high-precision sliding blocks

🛡️Chrome-plated anti-rust steel

KSh33667

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Description

⚙️ Glide into precision — your CNC’s new best friend!

BUILT TO LAST - Crafted from carbon steel rails and bearing steel blocks with chrome plating for unbeatable durability and rust resistance.
SMOOTH PRECISION GLIDE - Experience ultra-smooth linear motion with 4 industrial-grade SBR16UU bearing blocks designed for flawless CNC and automation performance.
EFFORTLESS INSTALLATION - Snap-in design lets you install the rails and blocks quickly—no maintenance needed, so you stay focused on your project.
OPTIMIZED FOR HEAVY DUTY USE - Supports large-scale transmission and automated machinery with a robust 800mm rail length and stable aluminum alloy housing.
VERSATILE AUTOMATION POWERHOUSE - Perfect for DIY CNC routers, laser machines, lathes, and industrial robots—upgrade your build with professional-grade linear guides.

The VEVOR Linear Rail Slide SBR16-800mm kit includes two 800mm carbon steel rails and four high-precision SBR16UU sliding blocks with chrome plating for rust resistance. Designed for smooth, maintenance-free linear motion, it’s ideal for CNC routers, automated machinery, and industrial applications requiring durable, stable, and precise linear guidance.

Specifications

ASIN	B0BLSD7K5R
Best Sellers Rank	#100,620 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #91 in Linear Motion Guides
Date First Available	November 8, 2022
Item Weight	8.6 pounds
Item model number	SBR16-C 800L
Manufacturer	VEVOR
Product Dimensions	31.5 x 3.15 x 1.27 inches

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KSh33667

Duties & taxes included

In stock

Sold byAmazon KenyaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Kenya.

Secure transaction

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