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The 693 deep groove ball bearing is a high-precision miniature bearing engineered for ultra-compact assemblies requiring minimal vibration and smooth rotational performance. Designed for high-speed micro motors and sensitive instrumentation, it ensures reliable operation in demanding micro-mechanical conditions.
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The 693 Deep Groove Ball Bearing represents the pinnacle of miniature mechanical engineering, offering an immaculate balance of spatial efficiency and robust kinetic performance. When integrated into your assemblies, these bearings exhibit a whisper-quiet rotation, a testament to the high-accuracy grinding of their raceways and the flawless sphericity of the rolling elements. The tactile feel of the bearing is one of absolute solidity despite its diminutive footprint, with zero perceptible play when handled. By minimizing rotational resistance, this component directly translates into energy savings and reduced thermal generation within your micro-drives or precision robotics. Whether operating in a sterile laboratory environment or a high-cycle automated scanner, the meticulously controlled heat treatment of the chrome steel or stainless steel ensures that the bearing resists microscopic wear and fatigue over millions of cycles. This means fewer maintenance interruptions, extended lifespan for the host machinery, and a profound enhancement in the overall reliability of your engineered solutions.
Parameter | Value | Description |
Bearing Model | 693 | Deep Groove Ball Bearing |
Inner Diameter (d) | 3 mm | Shaft diameter |
Outer Diameter (D) | 8 mm | Housing bore diameter |
Width (B) | 4 mm | Bearing width |
Chamfer (r min) | 0.15 mm | Minimum chamfer size |
Item | Specification |
Bearing Type | Single-row deep groove ball |
Precision Grade | ABEC-5 / ABEC-7 |
Noise Level | Z1 / Z2 low vibration |
Sealing Type | Open / ZZ / 2RS |
Material | Chrome Steel (GCr15) / Stainless Steel |
Cage Material | Steel / Polymer |
Lubrication | Pre-greased or oil-lubricated |
Operating Temperature | -20°C to +120°C |
Load Type | Value |
Dynamic Load (Cr) | Approx. 0.25 kN |
Static Load (Cor) | Approx. 0.08 kN |
Note:Actual load capacity may vary according to operating speed, lubrication, and radial clearance.
Bearing Version | Max Speed |
Open Type | ~60,000 RPM |
Metal Shield (ZZ) | ~45,000 RPM |
| Sealed (2RS) | ~32,000 RPM |
693 – Standard open bearing for precision instruments
693ZZ – Metal-shielded bearing for contaminant resistance
693-2RS / 693-2RS1 – Rubber-sealed bearing for moisture protectio
Achieving peak performance in miniature mechanical systems requires components that leave no room for error. The 693 bearing is meticulously crafted to eliminate friction and vibration, ensuring your end products function with absolute precision.
Frictionless Kinematics: The highly polished raceways drastically cut down on rolling resistance, allowing your motors to achieve higher efficiency ratings and consume less power during continuous operation.
Acoustic Discretion: Engineered to meet strict Z1 and Z2 noise levels, these bearings operate with a barely audible hum, making them the perfect candidate for medical devices and office automation where acoustic comfort is paramount.
Thermal Stability: The advanced metallurgical composition and premium lubrication options allow the bearing to maintain structural integrity and smooth rotation even when internal ambient temperatures fluctuate drastically.
Contaminant Defense: With versatile shielding and sealing options, the internal rolling elements remain pristine and fully lubricated, actively repelling microscopic dust particles and moisture that typically cause premature mechanical failure.
When engineering space-constrained devices, every fraction of a millimeter dictates the success of the design. The standard miniature footprint of this bearing guarantees a flawless, drop-in fit for your most intricate assemblies.
Features an exact 3mm inner bore, 8mm outer housing diameter, and 4mm width for ultra-compact integration.
Manufactured to stringent ABEC-5 and ABEC-7 tolerance classes to prevent runout and ensure perfect shaft alignment.
The precise 0.15mm minimum chamfer allows for smooth, snag-free installation during rapid assembly line processes.
Elimates dimensional variations, ensuring that every unit performs identically across large-scale production runs.
The longevity of your equipment relies heavily on the metallurgical integrity of its moving parts. We utilize superior alloys subjected to rigorous thermal processing to guarantee exceptional load-bearing capabilities and fatigue resistance.
Constructed from high-carbon Chrome Steel (GCr15) for maximum hardness and unparalleled wear resistance in high-load scenarios.
Available in premium Stainless Steel variants to combat oxidation and chemical exposure in sensitive or washdown environments.
Maintains dimensional stability and operational safety across a demanding temperature spectrum from -20°C up to +120°C.
Engineered to support a dynamic load of approximately 0.25 kN, providing robust structural support for micro-shafts without deformation.
High-velocity applications demand a bearing that can sustain rapid revolutions without generating excessive heat or disruptive acoustics. This bearing is specifically tuned to excel in high-RPM environments while maintaining a serene acoustic profile.
The open-type configuration effortlessly sustains extreme rotational speeds up to 60,000 RPM for demanding micro-drives.
Metal-shielded (ZZ) variants confidently handle up to 45,000 RPM while keeping internal lubrication intact and preventing lubricant splatter.
Achieves Z1 and Z2 low-vibration certifications, ensuring that sensitive optical or medical instruments remain entirely undisturbed during operation.
Polymer and steel cage options are precisely balanced to prevent internal friction and acoustic resonance at peak velocities.
Environmental hazards are the primary enemy of precision bearings. To safeguard the internal geometry and lubrication, we offer comprehensive sealing architectures tailored to your specific operational environment.
Open Type: Ideal for pristine, clean-room environments where maximum speed and zero seal friction are the absolute top priorities.
ZZ Metal Shields: Features dual non-contact metal shields that deflect particulate matter and retain grease without compromising rotational velocity.
2RS Rubber Seals: Utilizes dual contact rubber seals to create an impenetrable barrier against moisture, fluid splashes, and fine dust, drastically extending the service life in harsh conditions.
Custom Lubrication Retention: The sealing mechanisms are designed to prevent grease migration, ensuring lifetime lubrication for maintenance-free operation.
The versatility of the 693 bearing makes it a foundational component across a multitude of advanced industries. Its reliable performance elevates the functionality of sophisticated equipment globally.
Acts as the kinetic core for miniature electric motors, precision actuators, and advanced servomotors.
Ensures the smooth, stutter-free operation of laboratory centrifuges, fluid pumps, and critical medical diagnostic tools.
Drives the intricate paper-feed and scanning mechanisms in high-end office automation equipment like printers and copiers.
Provides fluid articulation for compact robotic joints, drones, and automated assembly arms.
Facilitates the silent and continuous rotation of cooling fans within high-performance electronic modules and servers.
We understand that off-the-shelf solutions rarely meet the nuanced demands of specialized engineering projects. Our comprehensive OEM capabilities allow you to tailor every aspect of the bearing to align perfectly with your technical blueprints.
Selectable radial clearances (C0, C2, C3) to accommodate varying thermal expansion rates and tight interference fits.
Custom lubrication injection, offering specialized high-speed, low-noise, or extreme-temperature greases based on your specific application needs.
Precision laser marking of your proprietary part numbers or corporate logos directly onto the bearing shields for brand reinforcement.
Bespoke packaging solutions designed to streamline your inventory management and automated assembly line feeding.
Dedicated prototyping and sample validation services to guarantee mechanical performance before committing to large-scale production.
Consistent quality and reliable delivery are the bedrock of successful manufacturing partnerships. As a direct source manufacturer, we implement uncompromising inspection protocols to ensure every single bearing performs exactly as specified.
Every production batch undergoes rigorous dimensional, acoustic, and rotational testing to guarantee absolute consistency across millions of units.
Streamlined factory-direct operations eliminate unnecessary markups, providing a highly cost-effective solution without sacrificing precision.
Flexible production capabilities effortlessly accommodate both rapid prototyping runs for R&D and massive, continuous volume orders.
Backed by a responsive technical support team ready to assist your engineers with complex selection, validation, and integration challenges.
Selecting the right component supplier is a critical decision that impacts your entire production ecosystem. We blend deep metallurgical expertise with advanced machining technology to deliver components that actively enhance your product's market reputation.
Uncompromising Precision: Our advanced grinding and honing techniques produce raceways with mirror-like finishes, drastically reducing friction and component wear.
Material Excellence: We source only the highest-grade raw materials, ensuring that our bearings resist deformation under heavy stress and provide a significantly longer operational lifespan.
Engineering Partnership: We do not just supply parts; we collaborate intimately with your engineering teams to optimize fit, lubrication, and sealing architectures for your specific use cases.
Dependable Fulfillment: Our optimized supply chain and robust inventory management mean your production lines will never stall waiting for critical mechanical components.
Navigating the technical nuances of miniature bearings can be complex. Below are detailed answers to the most common engineering inquiries regarding the 693 series.
The ABEC rating defines the dimensional tolerances and runout of the bearing. ABEC-7 offers tighter tolerances than ABEC-5, resulting in smoother high-speed operation, lower friction, and reduced vibration. ABEC-7 is highly recommended for ultra-precise instruments, while ABEC-5 is excellent for standard miniature motor applications.
Chrome steel provides superior hardness, excellent load capacity, and high fatigue resistance, making it ideal for standard environments. Stainless steel should be selected when the bearing will be exposed to moisture, corrosive chemicals, or requires frequent washdowns, as it offers exceptional rust and oxidation resistance, albeit with a slightly lower load capacity.
Yes, the standard operating temperature range is -20°C to +120°C. However, if your application exceeds these limits, we can customize the bearing with specialized high-temperature grease and heat-stabilized materials to ensure safe and continuous operation without thermal degradation.
Radial clearance refers to the internal room between the rolling elements and the raceways. A standard C0 clearance suits most applications. C2 (tighter) is used where precise positioning and minimal play are required. C3 (looser) is utilized to accommodate thermal expansion in high-temperature or high-speed applications, preventing the bearing from seizing.
Sealing mechanisms introduce varying levels of friction. Open bearings have no seals, offering zero friction and the highest speed (~60,000 RPM). ZZ metal shields are non-contact, allowing high speeds (~45,000 RPM) while blocking larger particles. 2RS rubber seals make contact with the inner ring to block moisture and fine dust, which increases friction and reduces the maximum speed (~32,000 RPM).
If you need a reliable 693 miniature deep groove ball bearing manufacturer, we offer technical expertise, consistent manufacturing quality, and responsive customer support to meet your industrial and OEM requirements.
