Sill Bearing
Sill Bearing
The 6007 Zz bearing is a fundamental component of modern mechanical power transmission. Classified under the single-row deep groove ball bearings family, this configuration is specifically optimized for high rotational speeds, low operational friction, and balanced radial and axial load distribution. The dual metal shields (denoted by "Zz") provide dynamic dust and contamination exclusion, making it the component of choice for rigorous industrial and automotive setups.
Engineering Note: GCr15 High-Carbon Chromium steel represents the zenith of bearing metallurgy, featuring a uniform distribution of hard chromium carbides that deliver excellent rolling fatigue resistance and mechanical stability under continuous load cycles.
| Parameter | Metric Value | Operational Significance |
|---|---|---|
| Bore Diameter (d) | 35 mm | Shaft mounting diameter interface, ensuring slip-fit or interference fit accuracy. |
| Outer Diameter (D) | 62 mm | Housing fit alignment, designed to sit securely under high radial vibrations. |
| Width (B) | 14 mm | Axial width footprint supporting mechanical loads within spatial limits. |
| Dynamic Load Rating (Cr) | 16.8 kN | Maximum load capacity under rolling element fatigue life guidelines. |
| Static Load Rating (Cor) | 10.2 kN | Yield limit of the rolling element under structural stationary states. |
| Limiting Speed (Grease) | 11,000 RPM | Max rotation velocity utilizing integrated factory lithium-complex grease. |
| Shielding Configuration | Double Steel Shields (ZZ) | Dual-flanged metallic barriers keeping lubrication in and contaminants out. |
From modern urban transit systems to regional agriculture operations, the 6007 Zz bearing plays a crucial role in maintaining mechanical efficiency. Its physical profile and sealing arrangement render it highly versatile across diverse global sectors:
Widely integrated into alternators, auxiliary power units, water pumps, and transmission shafts. The double-shielded configuration prevents grease migration under high-temperature cycles under the hood, guaranteeing smooth torque transfer and reduced NVH (Noise, Vibration, and Harshness).
Employed in domestic vacuum cleaners, washing machines, ventilation fans, and HVAC blowers. SILL brand bearings are optimized for lower friction coefficients, allowing home appliance manufacturers to achieve higher energy-efficiency ratings and quieter operations.
Fitted in combine harvesters, tractors, sorting systems, and seeding drills. In these demanding environments, the 6007 Zz’s metallic shields serve as a critical defense line against abrasive field dust, straw particles, moisture, and soil contamination.
Our main facility, SILL BEARING FACTORY, is strategically situated in China’s premier manufacturing zone: Hangzhou Bay New Zone. This strategic location places us adjacent to major global shipping corridors, including Shanghai Port and Ningbo Port. Direct access to the Hangzhou-Ningbo Expressway, State Line 329, and major rail routes simplifies transit, while our proximity to Hangzhou Xiaoshan Airport and Ningbo Lishe Airport ensures rapid air freight logistics within a 90-minute radius.
To meet increasing global demand, our new facility, Anhui TOPB IMP.&EXP. Co., Ltd., is under active construction. This expansion will boost our annual export capacity by $20 million, allowing us to support larger volume requirements from overseas buyers and OEM projects while offering competitive pricing.
We treat our industrial bearings with the utmost care throughout the production cycle. Every batch undergoes a rigorous 5-step quality verification process to guarantee consistent performance:
Initial-inspection of GCr15 high-carbon chromium bearing steel. We verify chemical purity, grain size consistency, and the absence of micro-voids.
CNC grinding and super-finishing machine operators conduct regular geometric measurements to catch tooling wear early.
Dedicated quality inspectors execute a 100% check on critical dimensions, axial runout, radial clearance, and vibration levels.
The Chief Inspector conducts statistical random sampling audits from packaged lots to ensure strict compliance with ISO and DIN standards.
Final visual inspection, rust-preventive packaging check, and container sealing verification before shipping out of our logistics center.
As industrial automation advances, bearing manufacturers must adapt. Our engineering R&D division is focused on upgrading the 6007 series to meet the challenges of next-generation machinery:
Exporting high-precision machinery components requires strict adherence to international industrial regulations. SILL brand bearings are designed and manufactured to comply with key standards in various regional markets:
Meets ANSI/ABMA standards. Our products support regional logistics channels, offering clear material declaration documents and barcode integration for efficient warehouse management.
Fully compliant with EU REACH and RoHS regulations. We ensure our materials are free from hazardous substances, supporting sustainability goals in European industrial sectors.
Custom packaging and heat-treatment certifications (ISPM 15) are provided to streamline customs clearance in the UAE, Turkey, Brazil, and other growing hubs.
Our engineering capabilities extend across several major categories of industrial bearings, each tailored to specific operational requirements:
SILL BEARING FACTORY is located in the beautiful and affluent place named Hangzhou Bay New Zone, which is not only close to the two biggest ports of China—Shanghai port and Ningbo Port, but also adjacent to Hangzhou—Ningbo Expressway, 329 State Line and Hangzhou-Ningbo Railway Line. Besides, it owns the advantage of transportation, as it only takes about 90 minutes to go to Hangzhou Xiaoshan Airport or Ningbo Lishe Airport.
To expand our production capacity, our new factory Anhui TOPB IMP.&EXP. Co., Ltd. is under construction. After the new factory is put into production, our annual production capacity will increase by $20 million.
Our factories specialize in designing, studying and producing Deep Groove Ball Bearings (⌀ 4mm ～ ⌀ 120mm), Tapered Roller Bearings as well as other non-standard bearings by using superior bearing steel “GCr15”. Our company not only owns the advanced automatic production equipment and the first-rate enterprise management, but also have excellent talents, the strict craft and solid technology. We also demand our workers to treat the bearings like eggs which need special care and attention.
We adopt five procedures including “raw material initial-inspection”, “operators' self-inspection”, “inspectors' full-inspection”, “chief inspectors' sampling”, and “final ex-factory products' inspection”. We are strict to the product quality to make its acceptance rate reach to 100%. Our company thinks highly of the brand construction, and owns the SILL and NETB brands, which are known for low noise, low vibration and friction, high accuracy, reliable sealing, long service life, and quiet operation. Our bearings have been widely applied to fields like household appliances, micro motors, electric fans, motorcycles, automobiles, medical instruments, sports machinery, textile and agricultural machinery. Our goods not only sell well in the domestic market, but also export to countries and regions such as the U.S., Brazil, Switzerland, United Arab Emirates, Iran, Turkey, Pakistan, Malaysia, Bangladesh, Egypt, Nigeria, Hong Kong, Taiwan and more.
Faced with both opportunities and challenges in the twenty-first century, the team at Sill Bearing Factory will continue to work hard to keep pace with the times and achieve great success. The company sticks to the principle of “people-oriented, future-creating” and the quality policy of “survival by high quality, seeking better developments by sincerity and integrity”. We warmly welcome friends from all over the world to visit us.
The double metal shields (ZZ) provide non-contact protection, meaning they exclude larger dust particles and contaminants without introducing frictional drag. This allows the bearing to reach higher RPMs compared to rubber contact seals (2RS), which experience friction from rubbing against the inner ring. ZZ shields are ideal for dry, relatively clean environments where high speeds are required. If exposure to direct water splash or fine dust is expected, a rubber contact seal (2RS) may be preferred.
GCr15 steel (equivalent to SAE 52100) is a high-carbon chromium alloy steel known for its high hardness, wear resistance, and structural stability. When properly heat-treated, it achieves a Rockwell hardness of 60-64 HRC, helping it resist rolling contact fatigue (spalling) under heavy dynamic loads. This metallurgical stability directly contributes to the calculated L10 bearing life in demanding applications.
Radial internal clearance is the total play between the outer ring, inner ring, and rolling elements. A normal clearance (C0) is standard for typical fits and temperatures. A C3 clearance provides extra space, which is useful when the bearing operates under thermal gradients that cause the inner ring to expand, or when heavy press-fits are used. Selecting the correct clearance helps prevent premature wear and overheating.
Our 6007 Zz bearings are pre-filled with high-grade lithium-complex grease. This grease is formulated to operate across a broad temperature range (-20°C to +120°C) and contains anti-wear and anti-oxidation additives, making it suitable for lifetime maintenance-free operations under normal conditions.
Yes. We specialize in custom solutions for unique operating environments. This includes custom inner/outer ring dimensions, specific radial clearance settings (C2, C3, C4), specialized grease options (high-temperature, food-grade, low-torque), and alternative cage materials (brass, nylon, steel). Please contact our technical team to discuss your specifications.
