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The 694 deep groove ball bearing is a high-precision miniature bearing engineered for compact mechanical systems requiring low friction, quiet operation, and extended service life. It delivers reliable rotational performance in micro motors, small gear assemblies, and automation devices.
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The 694 deep groove ball bearing represents the pinnacle of miniature mechanical engineering, meticulously crafted to transform how compact systems operate. When integrated into micro motors or precision instruments, it delivers a whisper-quiet, vibration-free rotation that drastically reduces energy loss and mechanical wear. The tactile smoothness of its finely ground raceways ensures that every revolution is fluid, providing a noticeable upgrade in the operational stability of your assemblies. By minimizing rotational resistance, this bearing allows your automated devices and miniature gearboxes to run cooler, faster, and longer without the need for constant maintenance. The robust metallic finish and flawless geometric precision speak to a manufacturing process obsessed with quality, ensuring that each unit drops perfectly into your housing bores. Whether you are developing advanced robotics or refining laboratory equipment, the structural integrity of this bearing provides the steadfast mechanical support required to elevate your end product's reliability and market reputation.
Parameter | Value | Description |
Bearing Model | 694 | Miniature deep groove ball bearing |
Inner Diameter (d) | 4 mm | Shaft diameter |
Outer Diameter (D) | 11 mm | Housing bore diameter |
Width (B) | 4 mm | Bearing width |
Chamfer (r min) | 0.3 mm | Minimum chamfer size |
Item | Specification |
Bearing Type | Single-row deep groove ball |
Precision Grade | ABEC-5 / ABEC-7 |
Noise Level | Z1 / Z2 (low noise) |
Sealing Type | Open / ZZ / 2RS |
Material | Chrome Steel (GCr15) / Stainless Steel |
Cage Material | Steel or high-performance polymer |
Lubrication | Pre-greased or oil-lubricated |
Operating Temperature | -20°C to +120°C |
Load Type | Value |
Dynamic Load (Cr) | ~0.45 kN |
Static Load (Cor) | ~0.18 kN |
Values may vary depending on lubrication type, clearance, and operational environment.
Bearing Version | Max Speed |
Open Type | ~60,000 RPM |
Metal Shield (ZZ) | ~45,000 RPM |
| Sealed (2RS) | ~32,000 RPM |
694 – Open bearing for general applications
694ZZ – Metal-shielded for dust and particle protection
694-2RS / 694-2RS1 – Rubber-sealed for moisture resistanc
Engineered for mechanical excellence, the 694 deep groove ball bearing integrates seamlessly into demanding environments, offering a suite of operational advantages that directly enhance your system's longevity and kinetic efficiency.
Whisper-Quiet Acoustics: Achieving Z1 and Z2 noise levels, the internal geometry is optimized to suppress acoustic emissions, making it ideal for noise-sensitive laboratory and office environments.
Thermal Stability: Capable of withstanding continuous operation between -20°C and +120°C, ensuring that thermal expansion does not compromise rotational accuracy or structural integrity.
Frictionless Fluidity: The meticulously polished raceways and high-grade steel balls reduce drag to an absolute minimum, translating to lower power consumption for battery-operated micro-devices.
Space-Optimized Strength: Despite its miniature 4x11x4 mm footprint, the bearing safely supports up to 0.45 kN of dynamic load, preventing premature failure in confined, high-stress assemblies.
Maintenance-Free Longevity: Pre-lubricated with application-specific greases, it eliminates the need for manual re-lubrication, significantly reducing the total cost of ownership for end-users.
Our 694 miniature bearings are developed across multiple critical dimensions to ensure they meet the exact physical and operational requirements of modern industrial applications.
Featuring a standard miniature footprint of 4mm inner diameter, 11mm outer diameter, and 4mm width, this bearing is machined to exact tolerances. Available in ABEC-5 and ABEC-7 precision grades, it guarantees flawless concentricity and runout accuracy, enabling perfect drop-in assembly for highly compact mechanical systems.
Forged from premium Chrome Steel (GCr15) or corrosion-resistant Stainless Steel, the structural foundation is incredibly resilient. Combined with advanced heat treatment and fine-grinding of the raceways, the friction coefficient is drastically reduced, which directly combats metal fatigue and extends the overall operational lifespan.
To combat diverse environmental threats, we offer three distinct sealing configurations. Choose the Open type for pristine environments, the ZZ metal shield for deflecting airborne particulates, or the 2RS rubber seal for superior moisture resistance. This flexibility allows procurement teams to precisely match the bearing to the environmental realities of their applications, slashing long-term maintenance costs.
Built for extreme rotational demands, the open variant achieves blistering speeds up to 60,000 RPM. Coupled with Z1/Z2 low-noise ratings and minimal rotational resistance, the bearing maintains exceptional kinetic stability and energy efficiency even during continuous, high-velocity operation.
Do not let the miniature size deceive you; this bearing is a structural powerhouse. It reliably supports dynamic loads of approximately 0.45 kN and static loads of 0.18 kN. This impressive load-bearing capacity provides steadfast mechanical support for micro motors and small gearboxes operating in severely restricted spatial envelopes.
The universal appeal of this bearing lies in its broad adaptability. It serves as the critical rotational core for micro-drive motors, precision testing instruments, medical and laboratory centrifuges, automated robotic joints, and high-end office equipment, ensuring seamless power transmission across diverse sectors.
Sourced directly from our advanced manufacturing facilities, we maintain a rigorous quality control matrix. We fully support volume procurement with extensive customization options, including specific radial clearances (C0/C2/C3), specialized grease injections, laser-etched part numbers, and custom packaging. This comprehensive service model is designed to seamlessly fulfill the exacting requirements of global industrial clients and original equipment manufacturers.
Securing a reliable supply of precision components is critical to maintaining your production momentum. As a dedicated manufacturer, we provide more than just hardware; we deliver a streamlined, risk-free sourcing experience tailored for high-volume industrial clients.
Direct Manufacturer Economics: By eliminating intermediaries, we provide highly competitive pricing structures that protect your project margins without sacrificing a single degree of quality.
Uncompromising Quality Assurance: Every batch undergoes rigorous dimensional and acoustic testing, ensuring that the bearings you receive perform exactly as specified, right out of the box.
Agile Production Capacity: Whether you require a rapid prototype run for a new robotic joint or millions of units for a global product rollout, our scalable manufacturing lines adapt to your schedule.
Deep Technical Collaboration: Our engineering team works closely with your designers to recommend the optimal sealing, lubrication, and clearance configurations, ensuring the bearing perfectly matches your application's unique stresses.
We understand that selecting the right miniature bearing involves careful technical consideration. Below are detailed answers to the most common inquiries we receive from engineering and procurement professionals.
What is the primary difference between the ZZ and 2RS sealing options for the 694 bearing?
The ZZ variant utilizes dual metal shields that provide excellent protection against larger dust particles while allowing for higher rotational speeds (up to 45,000 RPM) due to lower friction. The 2RS variant features rubber contact seals that offer superior defense against moisture and fine contaminants, though the slight contact friction limits the maximum speed to approximately 32,000 RPM.
Can this bearing handle high-temperature applications?
The standard operating temperature range is -20°C to +120°C. However, for applications exceeding this range, we can customize the bearing with specialized high-temperature grease and heat-stabilized steel, ensuring reliable performance in extreme thermal environments.
How does the ABEC rating impact the performance of my micro motor?
Higher ABEC ratings (such as our ABEC-5 and ABEC-7 options) indicate tighter manufacturing tolerances. This results in better concentricity, significantly reduced vibration, and lower noise at high speeds, which is absolutely critical for the smooth operation and longevity of precision micro motors.
Are custom radial clearances available for specific fitment requirements?
Yes, we offer standard C0 clearance, as well as C2 (tighter) and C3 (looser) options. C3 is often recommended for applications involving press fits or where thermal expansion might cause the internal components of the assembly to tighten during operation.
What is the typical lead time for customized volume orders?
While standard configurations are heavily stocked for immediate dispatch, custom orders requiring specific laser marking, specialized lubrication, or unique packaging generally require a lead time of 15 to 25 business days, depending on the exact specifications and order volume.
Do you provide samples for prototype testing before committing to a large order?
Absolutely. We highly encourage rigorous prototype testing. We can supply sample units tailored to your exact specifications, allowing your engineering team to validate the bearing's performance, noise levels, and durability within your actual application before initiating mass production.
For sourcing 694 miniature deep groove ball bearings, we provide technical support, consistent manufacturing quality, and responsive service to meet OEM and industrial requirements.
