Sill Bearing
Sill Bearing
Explore our diverse line of precision bearings designed to optimize performance in high-speed, load-bearing environments.
Decoding the physical geometry, load capacities, and industrial supremacy of the 6008 ZZ configuration in modern manufacturing.
The 6008 ZZ deep groove ball bearing features an inner diameter of 40mm, an outer diameter of 68mm, and a width of 15mm. This specific radial dimension ratio makes it highly efficient at managing balanced load distribution, preventing axial deviation even under high-RPM circumstances.
Equipped with dual-sided steel shields, the 6008 ZZ bearing restricts dust, moisture, and particle contamination. This non-contact design keeps the pre-filled grease sealed within the raceway while minimizing friction compared to rubber seals (2RS), allowing for superior high-speed rotation limits.
Engineered with a deep groove configuration, it provides equal capacity to withstand moderate radial and axial forces in both directions. This versatility prevents cage failure and premature wear in industrial gearboxes, pumps, and agricultural machinery.
Within the global rotation machinery market, the 6008 ZZ deep groove ball bearing represents a crucial compromise between space optimization and load bearing capacity. Its inner diameter is spacious enough to accommodate robust shafts, while its external shell remains compact enough to minimize the overall weight of complex machinery. Thanks to our specialized metallurgy and design processes, SILL BEARING guarantees that every 6008 ZZ bearing operates with maximum durability, silent efficiency, and extended service life.
The manufacturing process at SILL BEARING leverages advanced heating, grinding, and super-finishing technologies, allowing the inner and outer ring raceways to achieve nanometer-scale smoothness. This reduces start-up and running torque, making it an excellent choice for green manufacturing systems where energy conservation is paramount.
Verified engineering measurements for design integration and mechanical optimization.
| Feature Parameter | Engineering Specification | Benefits & Practical Implications |
|---|---|---|
| Bore Diameter (d) | 40 mm | Enables compatibility with standard industrial rotating shafts. |
| Outer Diameter (D) | 68 mm | Ensures low casing volume while retaining high rotational torque limits. |
| Width (B) | 15 mm | Saves space in axial alignment configurations. |
| Material Composition | GCr15 High-Carbon Chromium Steel | Guarantees hardness levels above HRC 60-65 for long-term wear resistance. |
| Dynamic Load Rating (Cr) | 16.8 kN | Handles sustained operational forces without surface fatigue. |
| Static Load Rating (Cor) | 11.5 kN | Resists heavy radial loads without plastic deformation. |
| Limiting Speed (Grease) | 11,000 RPM | Provides top-tier stability in high-velocity micro-motors. |
| Shield Type | Dual Metal Shields (ZZ) | Prevents lubricant leakage while shielding against particle ingress. |
Centrally located in the Hangzhou Bay New Zone, combining logistical advantages with strict quality protocols.
SILL BEARING FACTORY is strategically situated in China’s dynamic industrial hub, the Hangzhou Bay New Zone. This strategic location offers exceptional logistical access: we are only 90 minutes from both Hangzhou Xiaoshan Airport and Ningbo Lishe Airport, and close to Shanghai Port and Ningbo Port. Additionally, the nearby Hangzhou-Ningbo Expressway, the 329 State Line, and the Hangzhou-Ningbo Railway Line ensure fast, reliable transit for global shipments.
To support growing global demand, our new facility, Anhui TOPB IMP. & EXP. Co., Ltd., is under construction. Once fully operational, this expansion will boost our annual production capacity by $20 million, allowing us to serve major global OEMs and distributors with short lead times.
We specialize in designing and manufacturing deep groove ball bearings (ranging from ￠4mm to ￠120mm), tapered roller bearings, and custom non-standard configurations. Our processes feature automated production lines and advanced thermal processing, using high-quality GCr15 bearing steel to ensure product longevity.
To maintain a 100% product acceptance rate, our facility utilizes a rigorous 5-step quality management system:
Every shipment of GCr15 steel undergoes strict metallurgical testing, including composition analysis and ultrasonic scanning, to eliminate internal structural defects.
Machinists continuously monitor tolerance deviations on the production line using real-time digital micrometers to catch any variance early.
Automated coordinate measuring machines (CMMs) measure the runout, clearance, and roundness of 100% of finished parts.
Before leaving the factory, shipments undergo final vibration and acoustic signature testing to verify low-noise and low-vibration performance.
Delivering certified precision and scaled capacity for global supply chains.
We specialize in designing high-load structural bearing configurations to support various types of rotational dynamics.
How our 6008 ZZ series serves as the structural foundation for modern machinery systems worldwide.
Modern home appliances require quiet, smooth operation. The 6008 ZZ bearing series is widely used in high-efficiency washing machines, air conditioning blowers, and vacuum cleaners, where low vibration, low noise, and zero maintenance are essential.
Within the automotive sector, 6008 ZZ bearings are used in starter motors, water pumps, cooling fans, and alternators. The double metal shields protect the grease from engine compartment debris, helping maintain performance over long service lifespans.
Medical instruments require components with high rotational accuracy, low friction heating, and reliable operation. Our GCr15 bearings undergo special heat treatment to remain stable, making them suitable for diagnostic and clinical devices.
In modern automated factories, multi-axis robotic arms and conveyor systems operate continuously, placing high demand on rotating components. SILL's 6008 ZZ bearings feature internal clearances and lubricant fill rates optimized for long service life, helping reduce downtime and maintenance costs in high-duty automated environments.
Investing in advanced metallurgy, smart diagnostic bearings, and eco-friendly manufacturing technologies.
To extend wear life in high-load applications, our R&D team works to optimize the chemical composition and heat treatment of our GCr15 high-carbon chromium steel. By utilizing carbonitriding and secondary tempering processes, we refine the steel's microstructural matrix, reducing the rate of sub-surface fatigue propagation.
SILL BEARING is committed to reducing environmental impact. Our next-generation 6008 ZZ bearings use biodegradable synthetic greases designed to withstand high operating temperatures without breaking down or leaking, protecting the surrounding machinery environment.
Looking ahead, we are developing sensor-integrated bearing systems designed to capture real-time temperature, velocity, and vibration data. This allows operators to perform predictive maintenance, helping prevent unexpected equipment downtime.
How we leverage our location near major commercial hubs to ensure timely delivery and international compliance.
Our bearings meet major international standards, including ISO 9001:2015, RoHS, and REACH directives. This compliance ensures that our products are ready for import into highly regulated markets like the European Union, USA, and Japan.
Under our proprietary brands SILL and NETB, as well as OEM partnerships, we provide custom tailoring for bearing dimensions, seal modifications, internal clearances, and tailored lubrication packages.
Located near Ningbo Port and Shanghai Port, we arrange fast maritime shipping for bulk orders, helping reduce transit times and shipping costs for our global customers.
Answers to key technical, commercial, and operational questions about the 6008 ZZ deep groove ball bearing.
Select from our featured product lines to find the right configuration for your application.
Review our full range of deep groove, linear, and roller bearings for global shipping.
Reach out to our engineering and sales teams to request a quote, order samples, or discuss your custom OEM requirements.
Contact Our Engineers Now
