698 Deep Groove Ball Bearing

Product Description

The 698 Deep Groove Ball Bearing represents the pinnacle of precision engineering, meticulously designed to elevate the performance of your high-speed mechanical assemblies. When you handle this bearing, the flawless, mirror-like finish of the precision-ground raceways immediately communicates a standard of manufacturing excellence. In operation, it delivers a whisper-quiet, vibration-free rotation that drastically reduces mechanical wear and energy loss within your intricate systems. By integrating these premium components into your production lines or end-user devices, you effectively eliminate the costly downtime associated with premature parts failure. The tightly controlled internal geometry ensures an exceptionally smooth glide, allowing electric motors, automated conveyors, and delicate instrumentation to function at their absolute peak efficiency. Whether subjected to rapid acceleration or continuous, high-load operational cycles, this bearing maintains its structural integrity without generating excessive, damaging heat. Ultimately, upgrading to this precision-crafted component translates into extended product lifespans, significantly fewer maintenance interventions, and an enhanced reputation for the unyielding reliability of your own equipment.

Bearing Dimensions (Standard)

Performance Parameters (Reference)

Load Ratings (Reference)

Note: Load ratings may vary slightly depending on bearing clearance, material selection, lubrication, and operating conditions.

Speed Limits (Reference)

Common Variants

• 698-2RS / 698-2RS1 – Double rubber seals

• 698 – Open type

• 698ZZ – Double metal shields

Key Features & Highlights

Equipping your assemblies with our precision-engineered bearings brings immediate, measurable improvements to your operational workflow. We focus on delivering tangible components that solve real-world mechanical challenges, ensuring your machinery runs longer, faster, and cooler under pressure.

• Frictionless Operation: The highly polished raceways minimize rolling resistance, resulting in a noticeable reduction in energy consumption and heat generation during extended, continuous use.

• Acoustic Excellence: Engineered to meet strict Z1 and Z2 noise levels, these bearings operate with a muted, satisfying hum, perfect for noise-sensitive environments like corporate offices and medical facilities.

• Exceptional Load Distribution: The optimized ball-to-raceway conformity ensures that both radial and axial loads are evenly distributed, actively preventing localized stress fractures and metal fatigue.

• Corrosion Resistance: Available in premium stainless steel, providing a robust, impenetrable defense against moisture and harsh chemicals, thereby protecting your investment in unforgiving environments.

• Maintenance Reduction: Pre-lubricated with high-grade synthetic grease and protected by tight-fitting seals, these components drastically cut down on costly routine maintenance schedules.

Dimensional Specifications & Tolerance Control

Achieving perfect alignment in micro-motors and precision devices requires exacting dimensional standards. Our 8x19x6 mm compact design is manufactured under rigorous, uncompromising quality control protocols to ensure absolute perfection.

• Strict adherence to international dimensional tolerances ensures a flawless, drop-in replacement for your current assembly lines, eliminating costly fitting issues.

• Consistent batch-to-batch uniformity removes the need for manual adjustments during your manufacturing process, significantly accelerating your overall production output.

• The precision-machined 0.3 mm minimum chamfer allows for smooth, snag-free installation onto shafts and into tight housings, protecting both your technicians and your equipment.

• This bearing is perfectly suited for space-constrained applications where every single millimeter dictates the overall system efficiency, weight, and compactness.

Core Materials & Heat Treatment Process

The longevity of any rotational component begins with its metallurgical foundation. We utilize advanced material science to ensure your products withstand the test of time, harsh conditions, and rigorous daily use.

• Constructed from premium Chrome Steel (GCr15), this bearing offers unparalleled hardness and wear resistance under heavy, continuous loads.

• Optional Stainless Steel variants are available, providing exceptional durability in environments prone to severe oxidation, moisture, or chemical exposure.

• Each unit is subjected to a meticulously controlled heat treatment process that maximizes fatigue strength without compromising the core's vital structural toughness.

• The resulting material density translates to a solid, substantial tactile feel and a significantly extended operational lifespan, drastically reducing the frequency of component replacements.

Speed Limits & Operational Stability

High-velocity applications demand components that will not warp, vibrate, or seize under intense centrifugal forces and rapid acceleration profiles.

• The open-type variant achieves a blistering maximum speed of approximately 32,000 RPM, making it the ideal choice for high-performance electric motors and rapid-spin machinery.

• Advanced internal geometry effectively dampens microscopic vibrations, ensuring a stable, jitter-free rotation even when operating at peak velocities for extended durations.

• Strict Z1 and Z2 noise level certifications guarantee that your end-products operate with a muted smoothness, significantly enhancing the end-user's perception of your brand's overall quality.

• The bearing maintains exceptional thermal equilibrium during continuous high-speed cycles, actively preventing the catastrophic mechanical failures typically associated with localized overheating.

Sealing Protection & Lubrication Solutions

Contamination is the primary enemy of precision machinery. Our versatile sealing and lubrication options provide an impenetrable barrier against environmental hazards, safeguarding your internal mechanisms.

• Open Type: Perfectly suited for sealed environments, such as enclosed gearboxes, where external oil baths provide continuous, fluid lubrication.

• ZZ Metal Shields: Feature dual metallic barriers that deflect larger particulates and debris, ideal for standard industrial environments while maintaining an impressive high speed of 26,000 RPM.

• 2RS Rubber Seals: Create a tight, physical contact barrier against fine dust and moisture, locking in the vital lubricant for true maintenance-free longevity, operating safely up to 18,000 RPM.

• We offer highly customizable lubrication profiles, including high-speed, low-noise, or extreme-temperature (-20°C to +120°C) greases, tailored precisely to your specific operational climate.

Deep Customization & OEM/ODM Capabilities

We understand that off-the-shelf solutions do not always meet the complex, nuanced demands of specialized engineering projects. Our facility is fully equipped to adapt to your precise technical requirements.

• Select from ABEC-1, ABEC-3, or ABEC-5 precision grades to perfectly balance cost-efficiency with the exact level of microscopic accuracy your application demands.

• Specify radial internal clearances (C0, C2, C3) to seamlessly accommodate varying thermal expansion rates in your specific machinery during operation.

• Take advantage of our comprehensive private labeling services, including the precision laser marking of your corporate brand directly onto the bearing components.

• Utilize our customized, secure export packaging designed to integrate flawlessly into your existing inventory management and global distribution networks.

• Rely on our dedicated engineering support team to validate performance metrics and run rigorous stress tests before initiating large-scale production runs.

Multi-Industry Application Adaptability

The versatile engineering and robust construction of this compact bearing make it an indispensable component across a remarkably broad spectrum of demanding industries.

• Micro-Motors & Power Tools: Delivers the high-speed stability and heat dissipation required for heavy-duty hand-held drills and precision rotary tools.

• Automation & Conveyor Systems: Ensures the smooth, uninterrupted, and low-friction flow of materials along complex automated production lines.

• Pulleys & Guide Wheels: Provides frictionless, exact tracking for cables and drive belts in intricate mechanical routing systems.

• Office Automation: Enables the quiet, reliable, and precise operation of commercial printers, copiers, and high-resolution scanning equipment.

• Consumer Electronics: Supports the delicate, highly accurate micro-movements required in modern smart devices, drones, and consumer robotics.

Supply Chain Reliability & Cost Efficiency

Securing a dependable flow of high-quality components is critical to maintaining your production schedules and protecting your profit margins. We act as a seamless extension of your own manufacturing capabilities.

• Direct sourcing from our state-of-the-art manufacturing facility eliminates intermediary markups, dramatically improving your bottom line and procurement budget.

• Strict, unwavering adherence to ISO and international manufacturing standards guarantees that every single shipment meets your rigorous quality criteria.

• Optimized raw material utilization and highly efficient production workflows allow us to offer exceptionally competitive pricing without ever sacrificing performance.

• A robust, globally integrated logistics network ensures consistent, predictable lead times, effectively safeguarding your operations against unexpected supply chain disruptions.

• Our highly scalable production capacity seamlessly accommodates everything from initial prototyping runs to massive, ongoing volume requirements.

Why Choose Us

Partnering with a dedicated manufacturer transforms your procurement process from a stressful logistical challenge into a powerful strategic advantage. We are entirely committed to empowering your business through uncompromising quality and dedicated, proactive support.

• Unwavering Quality Assurance: Every single component undergoes rigorous automated and manual inspections before it leaves our facility, ensuring a zero-defect rate when it reaches your assembly lines.

• Engineering Expertise: Our elite team of veteran metallurgists and mechanical engineers is always on standby to assist you in selecting the perfect specifications for your unique applications.

• Responsive Communication: We pride ourselves on rapid response times, providing you with accurate technical data, highly transparent pricing, and real-time production updates.

• Long-Term Reliability: We do not just supply parts; we build enduring, strategic partnerships based on mutual growth, consistent performance, and absolute trustworthiness.

• Global Reach, Local Feel: Despite our massive production capabilities, we provide personalized, attentive service tailored to the specific regulatory and logistical needs of your specific region.

Frequently Asked Questions (FAQ)

Navigate the technical nuances of our precision components with our comprehensive guide, specifically designed to assist procurement and engineering teams in making highly informed decisions.

What factors should be considered when choosing between ZZ and 2RS sealing types?

The choice depends entirely on your specific operating environment. ZZ (metal shields) offer excellent protection against larger particles and debris while allowing for higher rotational speeds (up to 26,000 RPM) due to their non-contact, low-friction design. Conversely, 2RS (rubber seals) provide an airtight, physical barrier against fine dust and liquids, making them ideal for harsh, contaminated environments, though they reduce the maximum speed to approximately 18,000 RPM due to the inherent contact friction.

How does the ABEC rating impact the performance of my machinery?

The ABEC scale precisely measures the dimensional accuracy and tolerance of the bearing. An ABEC-1 rating is highly suitable for standard applications where extreme microscopic precision is not critical. Upgrading to ABEC-3 or ABEC-5 significantly tightens the manufacturing tolerances, resulting in much smoother operation, drastically reduced runout, and lower heat generation at high speeds, which is absolutely vital for high-precision instrumentation and sensitive electronics.

Can the internal radial clearance (C0/C2/C3) be customized for high-temperature applications?

Absolutely. For applications operating near the upper limit of our -20°C to +120°C range, we highly recommend specifying a C3 clearance. This slightly larger internal gap accommodates the natural thermal expansion of the steel components during intense operation, preventing the bearing from seizing and ensuring continuous, safe, and reliable functionality under thermal stress.

What are the primary advantages of selecting Stainless Steel over Chrome Steel (GCr15)?

Chrome Steel (GCr15) is the undisputed industry standard due to its exceptional load-bearing capacity and incredibly high fatigue resistance. However, if your equipment operates in highly humid environments, food processing facilities, or areas exposed to corrosive chemicals, Stainless Steel is the far superior choice. It sacrifices a very minimal amount of load capacity in exchange for outstanding, long-lasting rust and corrosion resistance.

How do you ensure consistency across large-volume production runs?

We maintain strict, uncompromising adherence to ISO quality management systems. Our production lines feature fully automated CNC grinding and computerized dimensional sorting. Additionally, we implement rigorous statistical process control (SPC) across all manufacturing batches to guarantee that the first unit you receive performs exactly identically to the ten-thousandth unit.