Sill Bearing
Sill Bearing
Understanding the mechanical profile, tolerances, and design intent behind the 6210 ZZ deep groove ball bearing configuration.
The 6210 ZZ deep groove ball bearing is globally recognized for its optimized geometric design. It features a 50mm bore diameter (d), a 90mm outer diameter (D), and a 20mm width (B). Standard units weigh approximately 0.46 kilograms.
These precise metrics allow it to serve as a reliable workhorse component. It manages radial and axial forces across mid-range speed limits by using structural pathways designed to minimize internal stress concentrations.
The "ZZ" suffix indicates that the bearing is fitted with double-sided steel shields. Unlike rubber-sealed alternatives (2RS), these metal shields are designed with non-contact clearances.
This design allows the bearing to run at higher speed ratings with minimal friction and heat build-up. The shields keep the pre-lubricated grease inside while keeping large particulate contaminants out, making them ideal for cleaner industrial environments.
Understanding supply chain dynamics, regional challenges, and procurement strategies for precision components.
Global procurement teams now prioritize supply chain resilience over short-term savings. Industrial buyers look for manufacturers that maintain buffer stocks of raw GCr15 steel to ensure stable lead times through changing global trade conditions.
Modern applications require tight manufacturing tolerances, including P6 or P5 precision classes and C3 radial internal clearances. Sourcing agencies verify these tolerances using standardized testing processes to avoid system failures in high-speed machinery.
Many industrial operations require custom modifications, such as high-temperature greases, specific surface treatments, or custom clearances. Sourcing from factories that offer direct engineering support helps bridge the gap between design and production.
Located in Hangzhou Bay New Zone, providing efficient logistics, advanced GCr15 steel processing, and expanded export capacity.
SILL BEARING FACTORY is located in Hangzhou Bay New Zone. This strategic location offers direct logistics advantages, situated close to the Shanghai and Ningbo ports. Major expressways and railway lines connect the factory directly to international transport routes, with Hangzhou Xiaoshan and Ningbo Lishe airports within a 90-minute reach.
To support growing global demand, our new facility under Anhui TOPB Imp. & Exp. Co., Ltd. is currently under development. Once fully operational, this expansion is projected to increase our annual export capacity by $20 million, allowing us to better serve our international partners.
Our facility specializes in the research, design, and production of Deep Groove Ball Bearings (ranging from ￠ 4mm to ￠ 120mm) and Tapered Roller Bearings. We manufacture our products using premium GCr15 high-carbon chromium bearing steel to ensure consistent performance, low operating noise, minimal vibration, and long service life.
We apply a structured five-step inspection framework to ensure product quality and target a 100% acceptance rate across all batches:
Incoming GCr15 steel bars and tubes are tested for chemical composition, micro-structure uniformity, and surface defects before entering the forging lines.
Machining and grinding operators perform regular dimensional checks using precision gauges to monitor tolerances at the work stations.
Completed parts are routed through automated measurement systems to verify roundness, raceway profiles, and noise levels.
Random quality audits are performed on finished lots to ensure compliance with targeted clearance, hardness, and grease-fill specifications.
A final packaging and paperwork check ensures correct labeling, anti-rust preservation, and shipping protection prior to container loading.
How the 6210 ZZ bearing performs in real-world machinery across global industrial sectors.
In mid-sized electric motors, 6210 ZZ bearings support high-speed shafts while keeping friction losses low. The steel shields retain grease over long service cycles, reducing maintenance requirements in manufacturing plants.
For outdoor machinery, such as harvesters and tractors, 6210 ZZ bearings are used in secondary shafts and gearboxes. The metal shields protect internal components from soil, debris, and crop fibers under variable operating conditions.
Automotive systems rely on the low noise and low vibration characteristics of these bearings. They are used in water pump systems, belt tensioners, and auxiliary power shafts, helping to maintain overall system reliability.
Logistics facilities use 6210 ZZ bearings in conveyor roller assemblies. The non-contact metal shields prevent dust accumulation while allowing rollers to rotate smoothly under constant radial loads.
Explore our diverse bearing solutions designed to meet a wide range of operational requirements.
Deep groove ball bearings are versatile, self-retaining bearings with deep groove raceways. This design allows them to handle moderate radial and axial loads in both directions. Key features include suitability for high-speed applications, low operating friction, reduced noise, and minimal maintenance. They are available in single and double-row designs, with open or sealed configurations to suit different environments.
Tapered roller bearings feature separate inner and outer rings with tapered raceways. Designed to manage combined heavy radial and axial loads, these bearings are classified into single-row, double-row, and four-row configurations based on application requirements.
Angular contact ball bearings are designed to support significant one-way axial loads. The load-carrying capacity increases with the contact angle, making them suitable for high-precision, high-load machinery applications.
Radial needle bearings use long, thin cylindrical rollers to support radial loads in space-constrained designs. They offer high load-carrying capacity and rotation precision relative to their cross-section, and are often paired with thrust components for combined load applications.
Select series manufactured to strict industrial standards for global markets.
At SILL BEARING FACTORY, we offer products under our proprietary brands: SILL and NETB, and provide complete OEM manufacturing services for global distributors. Our core focus is on Deep Groove Ball Bearings (￠ 4mm ~ ￠ 120mm), utilizing GCr15 bearing steel to ensure product durability, low vibration, and extended service life.
Common questions regarding technical specifications, selection, and application of 6210 ZZ deep groove ball bearings.
Contact SILL BEARING FACTORY today for custom OEM quotes, technical drawings, and batch supply consultations.
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