Work with prusa mk3? best than original kit?

These work fine on my MK2 and I plan to install them on my MK3. I see no reason for them not to work.

Does the bearing look like the picture shown? I've ordered this part from Igus and the bearing I received have groves along the inside wall.

Hi! Since we don't have 8mm liners (with the "groves" along the inside wall), we use iglide bearings and press them in. So the RJUM style bearings have grooves (liners) and the RJZM have a pressfit bearing.

What is the quantity?

It depends no the model printer you are making. A standard Prusa MK3 (or clone) requires 3 bearings for the bed. If you are making a different model then it may require 4 bearings. The bed carriage will show how many bearings it requires. These bearings will not fit on a standard Prusa X carriage as their outside diameter is too large for the housing.

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RJZM-01-08 DryLin R Straight Linear Bearing, 8 mm ID

RJZM-01-08 DryLin R Straight Linear Bearing, 8 mm ID

Product ID: 19342482

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Details

Brand
Igus
Material
Engineered
Bearing Number
RJZM 8
Specification Met
Din
Bearing Type
Ball Bearing

🔩Anodized aluminum for durability

⚙️8 mm inner diameter precision fit

🛡️Igus iglide J liner for ultra-low friction

Description

⚙️ Elevate your linear motion game with precision and durability!

PRECISION 8 MM ID FIT - Engineered for seamless integration with standard housings (H7 bore recommended).
ADVANCED IGLIDE J LINER - Self-lubricating polymer liner reduces maintenance and extends bearing life.
DURABLE ANODIZED ALUMINUM - Lightweight yet robust adapter ensures long-lasting performance and corrosion resistance.
OPTIMIZED FOR LINEAR MOTION - Closed design minimizes contamination, delivering smooth, reliable linear movement every time.
STANDARDIZED RETAINING CLIP COMPATIBILITY - Designed to securely fit DIN 471 or 472 clips (clips sold separately) for hassle-free installation.

The RJZM-01-08 DryLin R Linear Bearing features an 8 mm inner diameter, anodized aluminum adapter, and a self-lubricating iglide J liner for low-friction, maintenance-free operation. Compatible with standard recirculating ball bearing dimensions and DIN 471/472 retaining clips, it’s optimized for smooth, reliable linear motion in professional-grade applications.

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