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The 6901 deep groove ball bearing is a compact, single-row radial bearing engineered for high-speed and low-noise applications in space-constrained assemblies. It delivers reliable rotational performance and operational stability for precision equipment.
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When integrating motion control components into critical machinery, the physical integrity and operational silence of the bearing dictate the success of the entire system. The 6901 deep groove ball bearing presents a flawless metallic finish, indicative of the rigorous machining and polishing processes it undergoes during production. Upon rotation, the component produces a barely perceptible, smooth hum—a direct result of optimized raceway geometry and superior ball spherical precision. This frictionless movement translates directly into reduced energy consumption and minimal heat generation within your assemblies. By utilizing this meticulously crafted component, procurement teams and engineers can effectively eliminate premature mechanical failures, ensuring that end-user products operate with unparalleled reliability. The substantial tactile weight of the high-carbon chromium steel reassures assemblers of its structural density, while the precise dimensional tolerances guarantee a seamless press-fit into housings and onto shafts. Ultimately, this bearing acts as the silent workhorse in your mechanical designs, driving efficiency and safeguarding your brand's reputation for mechanical excellence.
Parameter | Value | Description |
Bearing Model | 6901 | Deep Groove Ball Bearing |
Inner Diameter (d) | 12 mm | Shaft diameter |
Outer Diameter (D) | 28 mm | Housing bore diameter |
Width (B) | 8 mm | Bearing width |
Chamfer (r min) | 0.3 mm | Minimum chamfer size |
Item | Specification |
Bearing Structure | Single-row deep groove ball bearing |
Precision Grades | ABEC-1 / ABEC-3 / ABEC-5 |
Noise Level | Z1 / Z2 |
Seal / Shield Options | Open / ZZ / 2RS |
Material | GCr15 bearing steel / Stainless steel |
Cage Material | Steel cage / Polyamide cage |
Lubrication | Pre-greased or oil |
Operating Temperature | -20°C to +120°C |
Load Type | Value |
Dynamic Load Rating (Cr) | Approx. 4.80 kN |
Static Load Rating (Cor) | Approx. 2.20 kN |
Reference values; actual performance may vary depending on bearing clearance, lubrication, and operating conditions.
Bearing Version | Limiting Speed |
Open Type | ~32,000 RPM |
Metal Shield (ZZ) | ~26,000 RPM |
| Rubber Seal (2RS) | ~18,000 RPM |
6901 – Open type
6901ZZ – Double metal shielded
6901-2RS / 6901-2RS1 – Double rubber sealed
Minimize maintenance intervals and maximize output. The internal geometry of this bearing is calibrated to distribute radial and axial loads evenly, preventing localized wear and extending the overall lifecycle of your equipment.
Friction Reduction: Highly polished raceways significantly lower rolling resistance, allowing your motors and drives to operate more efficiently with less power draw.
Thermal Dissipation: The structural design facilitates excellent heat transfer, maintaining safe operating temperatures even during prolonged high-speed cycles.
Vibration Dampening: Precision-matched rolling elements absorb micro-vibrations, protecting sensitive surrounding electronic and mechanical components from kinetic damage.
Load Versatility: Capable of handling an approximate dynamic load of 4.80 kN and a static load of 2.20 kN, providing robust support for demanding applications.
The foundation of any high-performance rotational component lies in its metallurgy. We utilize top-tier GCr15 bearing steel or corrosion-resistant stainless steel, depending on your specific environmental requirements. This ensures exceptional hardness and resistance to surface fatigue over millions of rotations.
Deep Hardening: Our specialized thermal processing guarantees uniform hardness throughout the steel, preventing subsurface cracking under heavy operational loads.
Microstructural Stability: Carefully controlled cooling cycles refine the grain structure of the metal, resulting in a tougher, more resilient bearing ring.
Surface Integrity: The final grinding and honing phases create a mirror-like finish on the raceways, eliminating microscopic asperities that could cause premature wear.
Cage Durability: Choose between a robust steel cage for high-temperature resilience or a lightweight polyamide cage for enhanced speed and reduced inertia.
Achieving seamless integration into complex machinery requires strict adherence to international tolerance standards. Available in ABEC-1, ABEC-3, and ABEC-5 precision grades, this bearing guarantees exact shaft and housing fits, eliminating runout and rotational wobble during operation.
Exceptional RPM Limits: Engineered to spin freely, the open variant achieves astonishing speeds up to 32,000 RPM, ideal for high-velocity electric drives.
Acoustic Excellence: Rated at Z1 and Z2 noise levels, the bearing operates with a whisper-quiet profile, which is crucial for consumer-facing electronics and sensitive medical devices.
Dynamic Balance: The perfectly spherical balls and concentric rings ensure that centrifugal forces are managed effectively, preventing destructive resonance at peak speeds.
Lubricant Retention: The internal design works synergistically with high-speed greases to maintain a consistent hydrodynamic film, preventing metal-to-metal contact even at maximum velocity.
Different operational environments demand specific protective measures to prevent contamination and lubricant loss. We provide three distinct configurations to match your exact application landscape, ensuring longevity regardless of external conditions.
Open Type: Designed for enclosed systems with continuous oil baths or highly clean environments, allowing for maximum rotational speeds up to 32,000 RPM with absolutely zero seal friction.
ZZ (Double Metal Shielded): Features dual steel shields that effectively repel larger particulates and debris. This variant retains pre-packed grease while maintaining an impressive speed limit of approximately 26,000 RPM.
2RS (Double Rubber Sealed): Equipped with precision-molded rubber seals that create a physical barrier against moisture, fine dust, and aggressive contaminants. Perfect for exposed applications, offering reliable performance up to 18,000 RPM.
Friction Optimization: Even our sealed variants are engineered to minimize lip contact pressure, balancing superior environmental protection with energy efficiency.
We understand that standard off-the-shelf components may not fulfill the nuanced requirements of specialized industrial projects. Our production lines are equipped to adapt to your specific engineering blueprints, providing a highly personalized procurement experience.
Internal Clearance Adjustment: Select from C0, C2, or C3 clearances to accommodate specific thermal expansion rates and interference fits within your assemblies.
Specialized Lubrication: We offer custom grease fills, including high-speed, high-temperature, and ultra-long-life formulations, ensuring the bearing performs optimally in extreme conditions.
Brand Integration: Enhance your product's professional appearance with custom laser marking on the bearing rings, displaying your proprietary part numbers, logos, or tracking codes.
Packaging Solutions: From bulk industrial trays designed for automated assembly lines to individually sealed anti-rust packets, we tailor the packaging to streamline your inventory management.
The compact dimensions and robust performance profile of the 6901 bearing make it an indispensable component for modern, space-constrained machinery. Its ability to deliver high torque transmission in a small footprint solves critical design challenges for engineers across multiple sectors.
Micro-Motors & Drives: Provides the low-friction support necessary for the high-efficiency operation of compact electric motors used in various automated systems.
Precision Robotics: Ensures smooth, repeatable articulation in robotic joints and core movement assemblies, contributing to precise spatial positioning.
Office Automation: Powers the quiet and reliable paper-feed mechanisms and scanning carriages in commercial printers and high-speed copiers.
Fluid Management: Acts as the reliable rotational core in small industrial pumps and compressors, withstanding continuous and demanding operational cycles.
Consumer Electronics: Delivers the silent, vibration-free performance expected in high-end consumer gadgets and motorized household appliances.
Securing a consistent flow of high-quality components is vital for maintaining your production schedules. As a primary manufacturer, we eliminate intermediary delays, providing a streamlined path from our factory floor directly to your assembly stations.
Stable Lead Times: Our scaled production capacity ensures that even the most substantial orders are fulfilled predictably, safeguarding you against costly inventory shortages.
Cost Optimization: By sourcing directly from the manufacturing source, procurement departments benefit from highly competitive pricing structures, maximizing overall project margins.
Engineering Consultation: Our technical team is available to assist with load calculations, lifecycle estimations, and optimal seal/lubricant selection prior to purchase.
Quality Assurance: Every batch undergoes rigorous dimensional and acoustic testing, guaranteeing that every single unit performs exactly to the specified standards upon arrival.
Selecting the right component partner goes beyond merely matching specifications; it requires absolute trust in consistent quality and reliable delivery. We have built our reputation on the relentless pursuit of manufacturing perfection and customer-centric service.
Stringent Quality Control: Utilizing advanced optical and acoustic inspection equipment, we ensure that microscopic defects are identified and eliminated long before packaging.
Material Traceability: Every batch of steel and lubricant is fully documented, providing you with complete transparency and confidence in the raw materials used.
Adaptive Manufacturing: Whether you require a standard production run or a highly customized iteration, our agile manufacturing processes adapt quickly to your specific demands.
Global Compliance: Our production facilities adhere to strict international environmental and quality management standards, ensuring safe, ethical, and sustainable manufacturing practices.
The decision relies heavily on your operating environment. Steel cages offer superior durability and are ideal for high-temperature applications or environments with aggressive chemicals. Polyamide cages are lighter, which reduces rotational inertia, making them excellent for rapid acceleration and deceleration while also operating significantly more quietly.
C3 clearance provides a slightly larger internal gap between the balls and the raceways compared to the standard C0. This extra space is crucial for applications where the bearing will experience significant thermal expansion due to high operating temperatures, or when a very tight interference fit is required on the shaft, which naturally compresses the bearing.
While the 2RS variant provides exceptional protection against dust and water ingress, the physical contact between the rubber lip and the inner ring creates friction. This friction limits its maximum safe speed to approximately 18,000 RPM. For higher speeds requiring protection, the ZZ metal shielded variant is highly recommended.
Under normal operating conditions, the high-quality grease pre-filled in our ZZ and 2RS bearings is formulated to last for the entire operational life of the bearing, creating a maintenance-free component. However, extreme ambient temperatures, excessive loads, or continuous operation near the maximum RPM limit can accelerate grease degradation.
Deep groove ball bearings are primarily designed to support radial loads. However, due to their deep and uninterrupted raceway grooves, they can also accommodate moderate axial loads in both directions. If your application involves heavy, continuous axial forces, consulting with our engineering team for a specialized bearing structure might be necessary.
