Kande 4PCS RJMP-01 RJ4JP POM Linear Bearings for 3D Printer

Kande 4PCS RJMP-01 / RJ4JP Polymer Plastic Linear Bearings for 3D Printers

Upgrade your 3D printer's motion system with these high-performance RJMP-01 / RJ4JP-01 plastic linear bearings from Kande Bearings. Engineered from premium POM (Polyoxymethylene) engineering-grade polymer — also known as "Super Steel" — these bushings deliver smooth, precise, and quiet linear motion for Prusa Mendel, Igus-compatible, and other popular 3D printer platforms.

Made in Mainland China.

Why Choose POM Polymer Linear Bearings?

Unlike traditional metal ball bearings, these polymer bushings glide effortlessly along your printer's shafts without causing scoring or surface damage. The self-lubricating POM material means zero maintenance — no greasing, no oiling, just consistent, reliable performance print after print.

Key Features

• Material: Engineering-grade POM (Polyoxymethylene) Polymer Plastic — thermoplastic crystalline high-polymer
• Compatibility: Designed for Prusa Mendel, Igus, and equivalent 3D printer shaft systems (RJ4JP-01 / RJMP-01 standard)
• Smooth & Silent: Noise-free operation for quieter prints
• Shaft-Safe: Smooth sliding surface protects shaft integrity — no scratching or scoring
• High Mechanical Strength: Excellent fatigue resistance and dimensional stability under repeated movement cycles
• Wear & Corrosion Resistant: Resists wear, corrosion, acids, and alkalis for long service life
• Waterproof & Antistatic: Safe around electronics, unaffected by moisture
• Additive-Free: Clean polymer construction — no harmful additives
• Maintenance-Free: No lubrication required, ever
• Package Includes: 4 × RJMP-01 / RJ4JP-01 Linear Bearings
• Model Number: B01333-25
• Brand: Kande Bearings

Specifications

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Frequently Asked Questions

Q: Are these RJMP-01 linear bearings compatible with my Prusa i3 3D printer?

A: Yes! The RJMP-01 / RJ4JP-01 polymer linear bearings are designed to be fully compatible with Prusa Mendel, Prusa i3, and similar RepRap-style 3D printers that use standard smooth rod shaft systems. They are also compatible with Igus-style polymer bearing housings.

Q: Do POM polymer linear bearings need lubrication like metal ball bearings?

A: No lubrication is required. The POM (Polyoxymethylene) polymer material is self-lubricating by nature, making these bearings completely maintenance-free. This also means no messy grease on your printer's motion components.

Q: Will these plastic linear bearings damage my printer's smooth rods or shafts?

A: No. The POM polymer surface is engineered to glide smoothly without scoring or scratching your printer's shafts. In fact, they are generally gentler on rods than traditional metal ball bearings, helping to extend the life of your motion system.

Q: How many bearings are included in one order?

A: Each package includes 4 × RJMP-01 / RJ4JP-01 polymer plastic linear bearings, giving you enough to outfit a standard printer axis setup.

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.