Bearings Parts

Micro Bearing Cage

Structural Types:

Cage: Integral precision-molded structure

Materials:

Cage Materials: Stainless steel (17-4PH), engineering plastics (PEEK, PI) 

Size Range:

Inner Diameter Range: 1mm - 10mm (custom special sizes available)

Accuracy Classes:ABEC-7 and above

Delivery Cycle: 7 - 15 days. For customized models, prior communication is required, and the delivery cycle will be arranged according to customization requirements.

Techspecs

ParameterSpecificationRemarks
Cage MaterialStainless steel (17-4PH) / Engineering plastics (PEEK, PI)Steel for rigidity, plastics for ultra-lightweight
Bore Diameter Range1mm - 10mmCustom sizes available
WeightAs low as 0.01g (plastic)Reduces rotational inertia
Precision GradeABEC-7 or higherRadial runout ≤0.003mm
Max. Speed50,000 rpm (plastic) / 30,000 rpm (steel)Depends on lubrication
Operating Temperature-60°C to +250°C (PEEK) / -40°C to +200°C (steel)Wide thermal tolerance
Wear ResistanceLow friction coefficient (μ<0.05)Special coatings available
ApplicationsMicro-motors, medical robotics, watch movements, dronesSpace-constrained precision systems

Description

Design Principles: The compact structural design is suitable for installation in micro spaces, and the positioning grooves precisely restrict the displacement of rolling elements to reduce晃动. The selection of lightweight materials reduces the overall mass and minimizes the inertial impact on micro-mechanical systems. Performance Characteristics: High-precision Positioning: Maintains micron-level rolling element centering to ensure vibration-free operation. High-speed Adaptability: The maximum speed of plastic cages can reach 50,000 rpm (depending on lubrication conditions). Strong Compatibility: Compatible with ceramic, steel and hybrid micro rolling elements.
Micro Bearing Cage

Features

Sub-millimeter Precision

Maintains micron-level roller alignment for vibration-free operation.

Minimal Mass Impact

Plastic cages reduce weight by up to 70% vs. metal.

Extended Service Life

Wear-resistant materials/coatings triple lifespan in high-cycle apps.

Custom Geometry

Tailored pocket designs for ceramic, steel, or hybrid micro rollers.

Working Principle

Micro Bearing Cage
The core structural design of the micro cage adopts an integrated precision molding process, and restricts micro rolling elements through special positioning grooves to ensure precise positioning in narrow spaces. The material selection takes both rigidity and lightweight into account to meet the structural stability requirements in micro scenarios. Its operational stability is guaranteed by the high-precision fit between the positioning grooves and the rolling elements, which can reduce gap晃动 as well as friction and vibration during operation. The lightweight design can also reduce the load impact of inertial force on the micro drive system and improve the response speed. In terms of material and working condition adaptation, stainless steel cages are suitable for scenarios with high rigidity requirements, while engineering plastic (such as PEEK) cages are suitable for ultra-lightweight and wide-temperature scenarios (-60°C to 250°C); special coatings can further enhance wear resistance. In terms of installation and fitting, it is adapted to the standard installation dimensions of micro bearings, and is assembled with bearing rings through interference or transition fit, with different inner diameter specifications corresponding to adapted tolerance ranges.

FAQ

Current minimum ID is 0.8mm with laser-cut steel; 1.2mm for molded plastics.
Yes-PEEK and 316L stainless steel cages meet ISO 10993 biocompatibility standards.
Steel offers higher rigidity (+15% load capacity), while plastics enable higher speeds (+20% RPM).
Provide samples or CAD—we replicate 95% of existing micro cage geometries.

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Luoyang City, Henan, China

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