U624ZZ U Groove Ball Bearings 4x13x7mm – 10 or 20 Pack

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JARBLUE U624ZZ U Groove Sealed Ball Bearings – 10 or 20 Pack

Keep your machinery running smoothly with these precision-engineered U624ZZ U Groove Deep Groove Ball Bearings from JARBLUE. Designed for low-speed, low-load applications, these high carbon steel bearings feature a distinctive U-shaped groove profile that guides and retains shafts, ropes, or wires with consistent stability. Choose from a pack of 10 or 20 to stock your workshop or complete your build.

Made in Mainland China.

Key Features

Sealed U Groove Design: The double-shielded (ZZ) construction keeps contaminants out for longer service life.
High Carbon Steel Construction: Delivers excellent hardness and durability for demanding mechanical applications.
Versatile Sizes Available: Two groove configurations to suit different shaft and track requirements.
Ordinary Precision Grade: Ideal for low-speed, low-load equipment such as 3D printers, sliding gates, rope guides, and DIY machines.
CE Certified: Meets recognized quality and safety standards.
Flexible Pack Options: Available in 10-piece or 20-piece packs to suit small projects or bulk needs.

Specifications

Brand	JARBLUE
Model Number	U624ZZ / U624
Material	High Carbon Steel
Certification	CE
Surface Roughness	Ra 0.05
Size (ID x OD x Thickness)	4mm x 13mm x 7mm or 4mm x 13mm x 4mm
U Groove (7mm version)	Width: 4.5mm \| Depth: 1.7mm
U Groove (4mm version)	Width: 2mm \| Depth: 1mm
Compatible Shaft Diameter	5.5mm
Pack Quantity	10 pcs or 20 pcs
Origin	Mainland China

Common Applications

3D printers and CNC machines
Sliding door and gate track systems
Rope and cable guide systems
DIY robotics and automation projects
Small conveyor and pulley assemblies

Package Contents

10 pcs U624ZZ U Groove Sealed Ball Bearings or 20 pcs U624ZZ U Groove Sealed Ball Bearings (choose your quantity above).

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Frequently Asked Questions

Q: What is the difference between the 4x13x7mm and 4x13x4mm U624ZZ ball bearings?

A: Both bearings share the same inner diameter (4mm) and outer diameter (13mm), but differ in thickness and groove dimensions. The 7mm-thick version has a wider U groove (4.5mm wide, 1.7mm deep), while the 4mm-thick version has a narrower groove (2mm wide, 1mm deep). Choose based on the shaft size and track profile of your specific application.

Q: Are these U624ZZ bearings suitable for 3D printers and CNC machines?

A: Yes! The U624ZZ deep groove ball bearings are a popular choice for 3D printers, CNC routers, and other precision DIY machines that use 5.5mm diameter rods or shaft rails. Their sealed (ZZ) design protects against dust and debris, making them well-suited for workshop environments.

Q: What material are these U groove ball bearings made from?

A: These U624ZZ bearings are manufactured from high carbon steel, providing strong hardness and dimensional stability for consistent mechanical performance in low-speed, low-load applications.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.

We prioritize quality in selecting the materials for our items, choosing premium fabrics and finishings that ensure durability, comfort, and timeless appeal.

We strive to process and ship all orders in a timely manner, working diligently to ensure that your items are on their way to you as soon as possible.