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The 627 Deep Groove Ball Bearing is a precision-engineered miniature bearing designed for high-speed, low-noise operation in compact mechanical assemblies. With standardized dimensions of 7x22x7 mm, it offers reliable radial and axial load support for light to medium-duty applications, ensuring smooth rotation and extended service life.
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The 627 Deep Groove Ball Bearing represents the pinnacle of rotational mechanics, meticulously crafted to transform raw kinetic energy into smooth, whisper-quiet motion. When handled, the bearing exudes a dense, substantial feel, indicative of the premium high-carbon chrome steel forged into its core. The mirror-like finish of the internal raceways minimizes rolling resistance, ensuring that every rotation is executed with absolute fluidity and zero tactile grit. This component is not merely a replacement part; it is the silent heartbeat of high-performance machinery, purposefully designed to eradicate the harmonic vibrations that plague lesser components.
Engineered to operate flawlessly under continuous, punishing cycles, this bearing actively dissipates the friction-induced heat that typically degrades mechanical lifespans. Its acoustic profile is exceptionally subdued, emitting only a faint, reassuring hum even as it approaches maximum velocity. By integrating these bearings into your production lines, you instantly elevate the operational ceiling of your end products. The precise internal geometry guarantees that radial and axial loads are distributed evenly across the rolling elements, preventing premature wear and safeguarding your equipment against catastrophic failure. It stands as a definitive solution for procurement teams seeking to eliminate maintenance bottlenecks and enhance the overall reliability of their mechanical portfolios.
Parameter | Value | Description |
Bearing Model | 627 | Deep Groove Ball Bearing |
Inner Diameter (d) | 7 mm | Shaft diameter |
Outer Diameter (D) | 22 mm | Housing bore diameter |
Width (B) | 7 mm | Bearing width |
Chamfer (r min) | 0.3 mm | Minimum chamfer size |
Item | Specification |
Bearing Type | Deep Groove Ball Bearing |
Precision Grade | ABEC-1 / ABEC-3 / ABEC-5 |
Noise Level | Z1 / Z2 (low noise) |
Sealing Type | Open / ZZ / 2RS |
Material | Chrome Steel (GCr15) / Stainless Steel |
Cage Material | Steel / Nylon |
Lubrication | Grease or Oil |
Operating Temperature | -20°C to +120°C |
Load Type | Value |
Dynamic Load Rating (Cr) | Approx. 3.40 kN |
Static Load Rating (Cor) | Approx. 1.37 kN |
Note:Load ratings may vary slightly depending on bearing clearance, material selection, and lubrication conditions.
Bearing Version | Max Speed |
Open Type | ~30,000 RPM |
Metal Shield (ZZ) | ~24,000 RPM |
Rubber Seal (2RS) | ~16,000 RPM |
627 – Open type
627ZZ – Double metal shields
627-2RS / 627-2RS1 – Double rubber seals
Upgrading your mechanical assemblies requires components that deliver measurable improvements in efficiency and longevity. The 627 Deep Groove Ball Bearing is engineered with a strict focus on reducing operational friction, extending maintenance intervals, and enhancing the overall acoustic profile of the machinery it inhabits. By prioritizing structural integrity and rotational precision, this component directly translates to fewer equipment breakdowns and a more streamlined manufacturing output.
Frictionless Operation: Advanced raceway geometry drastically cuts down energy loss, allowing motors to run cooler and significantly more efficiently.
Acoustic Dampening: Precision-ground steel balls ensure a Z1/Z2 noise level, essential for noise-sensitive environments like medical facilities or quiet offices.
Thermal Resilience: Capable of maintaining structural integrity from freezing -20°C environments up to a blistering +120°C without dimensional deformation.
Optimized Load Distribution: Carefully calibrated internal clearances evenly spread dynamic forces, preventing concentrated wear spots on the bearing tracks.
Active Contaminant Exclusion: Multiple barrier options actively repel abrasive dust and corrosive moisture, safeguarding the critical internal lubrication.
Achieving flawless mechanical integration begins with uncompromising dimensional tolerances. The standard 7x22x7mm footprint of this bearing is machined with microscopic precision, ensuring a perfect press-fit into micro-motors and delicate instruments without the need for secondary housing modifications. This exactness eliminates the micro-wobble that often leads to premature mechanical fatigue.
Standardized 7x22x7mm Profile: Guarantees universal compatibility with existing shaft and housing designs, accelerating your assembly line speed and reducing engineering overhead.
ABEC-1 to ABEC-5 Precision Grades: Choose the exact tolerance level required for your specific application, allowing you to perfectly balance cost-efficiency with ultra-high precision.
0.3mm Minimum Chamfer: Engineered to facilitate smooth, snag-free installation onto shafts, reducing manual assembly time and preventing component scoring.
Strict Concentricity Control: Unwavering adherence to runout tolerances ensures uniform rotation, which is absolutely critical for high-speed robotic joints and precision optical drives.
The foundational strength of any rotational component lies in its metallurgical composition. We utilize premium, high-carbon chrome steel (GCr15) and aerospace-grade stainless steel to forge a bearing capable of withstanding immense structural stress. This robust material selection ensures that the bearing maintains its mirror-smooth raceways even under continuous, heavy-duty cycling, directly reducing your replacement costs.
High-Carbon Chrome Steel (GCr15): Offers exceptional surface hardness and subsurface wear resistance, making it ideal for high-load, continuous-operation industrial environments.
Stainless Steel Alternative: Provides superior corrosion resistance for specialized applications exposed to moisture, harsh chemicals, or stringent washdown procedures.
Broad Temperature Range: Operates flawlessly between -20°C and +120°C, maintaining dimensional stability in both freezing storage units and high-heat motor housings.
Versatile Cage Materials: Available with rigid steel cages for maximum durability under stress, or lightweight nylon cages for reduced rotational inertia in high-speed applications.
Pushing machinery to its limits requires a bearing that will not buckle under pressure. Engineered for exceptional load-bearing capabilities, this component effortlessly handles both radial and axial forces. By absorbing the punishing vibrations of high-speed operation, it ensures your end products deliver a smooth, premium experience to the final user.
High Dynamic Load Rating (3.40 kN): Easily supports continuous rotational stress, making it the perfect backbone for demanding conveyor systems and heavy-duty power tools.
Reliable Static Load Rating (1.37 kN): Withstands sudden mechanical impacts and resting weight without denting the raceways, preserving long-term smooth operation.
Extreme Rotational Velocity: Open type variants achieve an astounding 30,000 RPM, unlocking entirely new performance tiers for micro-turbines and high-speed spindles.
Z1/Z2 Low Noise Certification: Specifically engineered to eliminate grinding and clicking sounds, a crucial requirement for consumer-facing appliances and quiet office environments.
Environmental contaminants are the primary enemy of mechanical longevity. To combat this, our bearings are available in multiple specialized sealing configurations, designed to lock in essential lubrication while actively repelling destructive dust, grit, and moisture. This targeted protection means your equipment can operate in harsh, unforgiving environments without constant maintenance.
Open Configuration (627): Maximizes speed potential (up to 30,000 RPM) and allows for easy, rapid re-lubrication in clean, enclosed mechanical environments.
Dual Metal Shields (627ZZ): Provides a robust physical barrier against larger debris while maintaining excellent high-speed capabilities (up to 24,000 RPM).
Dual Rubber Seals (627-2RS): Creates an airtight, watertight seal that absolutely prevents fine dust and fluid ingress, perfect for messy industrial applications (up to 16,000 RPM).
Optimized Lubrication Retention: Sealed variants come pre-packed with premium grease, ensuring lifetime lubrication and eliminating the need for costly manual greasing schedules.
A truly superior component must adapt to a multitude of engineering challenges. The highly standardized dimensions and robust performance profile of this bearing make it the component of choice across a vast spectrum of industries. By standardizing your procurement around this versatile part, you can simplify your inventory management and ensure consistent quality.
Electric & Micro Motors: Delivers the ultra-low-friction rotation necessary to maximize battery life and motor efficiency in compact, high-drain electronics.
Fitness & Sports Equipment: Provides the smooth, silent, and reliable operation expected by consumers in premium treadmills, exercise bikes, and rowing machines.
Conveyor & Automation Systems: Ensures reliable, jam-free movement in continuous-duty industrial sorting facilities and automated packaging lines.
Robotics & Precision Instruments: Offers the exact tolerances required for the delicate, precise, and repeatable movements of robotic arms and optical scanners.
Office Machinery: Powers high-volume printers and copiers with whisper-quiet reliability, preventing disruptive operational noise in professional settings.
We understand that off-the-shelf solutions do not always meet the rigorous demands of specialized engineering. As a dedicated manufacturing partner, we offer comprehensive deep customization services, allowing you to tailor every aspect of the bearing to your exact specifications. From internal clearances to bespoke branding, we provide the tools you need to differentiate your products.
Adjustable Radial Clearance (C0/C2/C3): Customize the internal play to perfectly match your specific operating temperatures and interference fit requirements.
Specialized Lubrication Injection: Choose from high-speed, ultra-low-noise, or extreme-temperature greases to match your unique environmental challenges.
Laser Engraving & Branding: Enhance your brand visibility and traceability with custom laser-marked logos and part numbers directly on the bearing shields.
Tailored Packaging Solutions: Streamline your receiving and assembly processes with custom-designed blister packs, protective tubes, or bulk industrial packaging.
Securing a reliable supply chain is just as critical as the engineering of the component itself. Sourcing directly from our advanced manufacturing facility guarantees not only highly competitive pricing but also uncompromising quality consistency across massive production runs. Our stringent adherence to international standards ensures that the millionth bearing performs exactly like the first.
Direct Manufacturer Sourcing: Eliminate intermediary markups and secure highly competitive pricing for your high-volume procurement strategies.
Advanced CNC Machining: State-of-the-art grinding and milling equipment guarantees absolute consistency in dimensional tolerances and surface finishes.
Rigorous ISO Compliance: Every batch undergoes exhaustive metallurgical and dimensional testing to ensure total compliance with strict global engineering standards.
Stable & Predictable Lead Times: Robust production capacity ensures your assembly lines never halt due to unexpected component shortages or delayed shipments.
Partnering with the right component supplier is a strategic decision that impacts your entire production ecosystem. We go beyond mere manufacturing; we act as a dedicated extension of your engineering and procurement teams. Our unwavering commitment to metallurgical excellence, precision machining, and responsive communication ensures that your supply chain remains resilient and your end products remain superior.
Unwavering Quality Assurance: Automated optical inspection and acoustic testing guarantee that zero defective units reach your assembly floor.
Agile Production Scaling: Whether you require a small pilot run for prototyping or massive continuous volume, our facilities scale to meet your exact demand.
Expert Engineering Support: Our technical team collaborates directly with your designers to recommend the optimal bearing configurations for your unique applications.
Global Logistics Expertise: Streamlined export processes and robust packaging ensure your components arrive on time and in pristine condition, regardless of your geographic location.
The ZZ configuration utilizes dual metal shields, which are excellent for keeping out larger particulate debris while allowing for high-speed rotation up to 24,000 RPM due to lack of physical friction. The 2RS configuration uses dual rubber seals that make direct physical contact with the inner ring, providing superior, watertight protection against fine dust and moisture, though it slightly limits the maximum speed to 16,000 RPM due to the increased seal friction.
Radial clearance refers to the microscopic internal space between the steel balls and the raceways. C0 is the standard clearance suitable for most general applications. C2 offers a tighter fit, which is ideal for high-precision, low-vibration needs where rigidity is paramount. C3 provides greater internal clearance, which is absolutely essential for high-temperature operations where the metal components will naturally expand, preventing the bearing from seizing under thermal stress.
Yes, our standard GCr15 variants are engineered to operate reliably in ambient temperatures ranging from -20°C up to +120°C. For specialized applications exceeding this thermal threshold, we can custom-manufacture the bearings utilizing heat-stabilized steel alloys and inject specialized high-temperature synthetic greases to ensure long-term durability without structural degradation.
GCr15 chrome steel undergoes a highly controlled heat treatment process that results in exceptional surface hardness combined with subsurface toughness. This specific metallurgical profile drastically reduces rolling contact fatigue, allowing the bearing to support heavy dynamic loads (up to 3.40 kN) over an extended operational lifespan without experiencing spalling, pitting, or cracking.
Absolutely. We highly encourage rigorous prototype testing to ensure perfect mechanical synergy. We can supply customized sample batches featuring your required precision grades, specific clearances, and chosen lubricants. This allows your engineering team to fully validate the performance within your actual mechanical assemblies before you finalize your volume procurement strategy.
If you are searching for a 627 deep groove ball bearing manufacturer or OEM partner, contact us today. We offer professional technical support, competitive pricing, and reliable delivery.
