Sill Bearing
Sill Bearing
Explore our high-performance industrial deep groove and specialized bearings direct from our automated manufacturing plants.
High performance deep groove dimensions.
Thin section architecture for space savings.
Advanced production process development.
Articulated linkage components.
Inch-dimension deep groove bearings.
Miniature inch series for high speed.
High radial-axial combination capacities.
Extended width and high sealing ratings.
The 6210 Zz bearing is one of the most widely implemented radial ball bearings across complex mechanical assemblies. Characterized by a 50mm inner diameter (bore), a 90mm outer diameter, and a 20mm width, this bearing is optimized to manage substantial radial loads while accommodating moderate axial forces in both directions. The "Zz" designation indicates double-sided metallic shields, providing basic mechanical protection against ingress while retaining vital lubrication.
At our manufacturing facility, we design and produce 6210 Zz bearings using premium-grade GCr15 high-carbon chromium bearing steel. Heat-treated through state-of-the-art hardening procedures, our bearings achieve a stabilized hardness of 60-64 HRC, guaranteeing resistance to wear and subsurface fatigue. This specific structural composition provides maximum dimensional stability under continuous mechanical strain.
"For engineering systems operating at speeds exceeding 7,500 RPM, radial internal clearance control (CN/C3/C4) and dynamic runout minimization are critical metrics. Our automated grinding and honing lines achieve tolerances matching ISO Class 6 (P6) and Class 5 (P5) standards."
To assist system engineers in structural validation, the following table details the key performance parameters of our 6210 Zz bearings compared to standardized requirements.
| Specification Parameter | Standard (ISO/DIN) | SILL BEARING Factory Specs |
|---|---|---|
| Bore Diameter (d) | 50 mm ± 0.012mm | 50 mm (-0.008 to 0 mm) |
| Outer Diameter (D) | 90 mm ± 0.015mm | 90 mm (-0.011 to 0 mm) |
| Width (B) | 20 mm ± 0.120mm | 20 mm (-0.120 to 0 mm) |
| Dynamic Load Rating (Cr) | 35.1 kN | 37.8 kN (Optimized geometry) |
| Static Load Rating (Cor) | 23.2 kN | 24.5 kN (Enhanced raceway curvature) |
| Limiting Speed (Grease) | 7,800 RPM | 8,500 RPM (High-temp Mobil polyurea grease) |
| Vibration / Noise Grades | Z1 / V1 | Z2 / V2 (Standard), Z3 / V3 (Optional EMQ) |
The 6210 Zz deep groove ball bearing serves as a critical component in localized industries, bridging the gap between mechanical power transmission and physical efficiency. By analyzing customer deployments, we have optimized the design for these environments:
The Hangzhou Bay New Zone location of Sill Bearing Factory offers significant logistical advantages. Located close to Shanghai Port and Ningbo Port, our facility ensures containerized shipments reach deep-water terminals quickly. In bulk bearing supply chains, shipping speed directly impacts assembly line uptime. Access to major transit routes allows us to deliver products rapidly to worldwide clients in the U.S., Brazil, Switzerland, UAE, Turkey, and Southeast Asia.
Our raw material sourcing is highly integrated. We procure premium raw GCr15 steel rods from leading domestic mills. Every batch undergoes ultrasonic inspection to detect inclusions, surface cracks, or metallurgical anomalies. This domestic availability helps insulate our international partners from supply disruptions.
To ensure a 100% product acceptance rate, our factories operate under a comprehensive 5-stage quality inspection framework:
As industrial automation demands higher reliability, we are updating our standard metal shield designs. Our engineering roadmap includes low-friction non-contact rubber seals (2RZ) and synthetic polyurea greases capable of operating from -40°C to +180°C. We are also integrating smart sensor housings to assist predictive maintenance strategies in heavy industry.
Precision Deep Groove & Specialized Ball Bearing Manufacturing Since 2002.
We specialize in designing, studying, and producing a diverse selection of bearing architectures to meet industrial demands.
Technical answers to critical design, supply, and performance queries regarding 6210 Zz and related bearings.
The 6210 Zz bearing has a 50mm inner diameter, a 90mm outer diameter, and a 20mm width. It features metal shields on both sides to retain grease and protect against larger contaminants.
Metal shields (ZZ) provide low friction and high speed limits but offer less sealing protection than rubber seals (2RS). Rubber seals provide better contact sealing against dust and moisture but generate more friction, which limits maximum RPM.
We use premium GCr15 high-carbon chromium bearing steel (comparable to SAE 52100 or 100Cr6) to ensure durability, wear resistance, and long service life.
Our main factory is in Hangzhou Bay New Zone, close to Shanghai and Ningbo ports. This location allows for fast shipping and reliable logistics for global orders.
We use a 5-stage QC process: raw material analysis, operator checks, automated sizing, random batch audits, and 100% final vibration/noise testing.
Our optimized 6210 Zz bearing features a dynamic load rating of 37.8 kN, which exceeds standard ISO values due to refined raceway geometry.
Yes. Along with our SILL and NETB brands, we offer full OEM services, including custom laser marking, specialized greases, and custom packaging.
The Anhui TOPB factory, currently under construction, is designed to increase our annual production capacity by $20 million to meet growing demand.
Yes, we supply bearings with CN (standard), C3 (extra clearance), and C4 clearances to accommodate thermal expansion in high-speed or high-temperature environments.
You can contact our sales team using the contact form below. We offer technical assistance, drawings, and samples for bulk industrial inquiries.
Additional heavy-duty and precision bearing configurations manufactured to strict global tolerances.
Extremely thin profile deep groove selection.
High axial loading in minimal axial space.
Compact radial roller arrays.
Double row integral shaft solutions.
Heavy load capacity deep groove bearings.
Recirculating balls for linear motion control.
Custom-dimension components built to order.
Light series ball bearings for high-speed systems.
Optimized configurations that deliver high reliability across industrial applications.
Thin-walled deep groove design.
Compact layout configurations.
Heavy load carrying capability.
Standard radial configuration series.