-- SKF Authorized Engineering Partner
Ensure smooth, reliable performance in your machinery with this high-quality NSK Cylindrical Roller Bearing, designed to handle radial loads with precision and durability. Crafted from premium bearing steel, it delivers consistent operation even under demanding conditions, reducing downtime and extending equipment lifespan.
15+ Certified Engineers On-Call
Free application analysis · Failure diagnosis · Custom modification guidance. Response within 24 hours.
| Parameter | Details |
|---|---|
| Model Number | 684 |
| Bearing Type | Deep Groove Ball Bearings |
| Rows Number | Single |
| Load Direction | Radial Bearing |
| Material | Bearing Steel |
| Seals Type | Zz 2RS Open |
| Lubrication | Grease or Oil |
| Precision Rating | P0 P6 P5 P4 P2 |
| Vibration | Z1V1 Z2V2 Z3V3 |
| Specification | 8*22*7 mm |
| Origin | Japan |
| HS Code | 8482102000 |
| Industry | Typical Applications |
|---|---|
| Automation Equipment | Conveyor systems, precision linear guides |
| Mechanical Engineering | Small electric motors, pumps, gearboxes |
| Industrial Machinery | Textile machines, packaging equipment |
Procuring bearings often means navigating a maze of brands and specifications. The wrong fit can lead to premature wear, unexpected downtime, or compatibility issues with existing equipment. Many buyers struggle to source specific models like N236em, N238em, and N240em quickly, especially when dealing with multiple suppliers for different brands.
This deep groove ball bearing addresses common procurement challenges with a combination of ISO 9001-certified manufacturing and broad brand coverage. Available in precision ratings from P0 to P2 and seal options including Zz, 2RS, and Open, it suits applications requiring radial load support in automation equipment, small motors, and industrial machinery. With dimensions of 8x22x7 mm, it follows international standards for easy interchangeability.
Designed for single-row radial load applications, this bearing operates effectively with grease or oil lubrication, making it versatile across temperature ranges and operating conditions. Its bearing steel construction ensures durability in standard industrial environments, while vibration classes Z1V1 to Z3V3 allow selection based on noise and precision requirements—critical for equipment like conveyor systems and packaging machinery where smooth operation is essential.
The 8x22x7 mm dimension set provides a balance of compact size and load capacity, ideal for space-constrained applications. Precision ratings (P0-P2) directly affect rotational accuracy; higher grades like P5 or P4 reduce vibration in high-speed equipment. Seal types offer flexibility: Zz shields protect against contaminants in dry environments, while 2RS seals retain lubricant in dusty or moist conditions, extending maintenance intervals. The radial load design ensures optimal force distribution, minimizing stress on inner and outer rings during operation.
Choosing a bearing with proper precision and material quality avoids hidden costs associated with premature failure. Bearings that lack hardness or dimensional accuracy often show early wear, leading to equipment vibration, noise, and unplanned downtime. This unit’s bearing steel composition and rigorous testing—including material and成品尺寸 inspections—reduce the risk of such failures. By aligning with international standards, it also simplifies replacement, eliminating the need for custom modifications or multiple supplier comparisons.
Our production and inspection processes adhere to ISO 9001 standards, ensuring consistent quality from raw material testing to成品 verification. Each bearing undergoes dimensional, hardness, and surface treatment checks before shipment. We provide a warranty against manufacturing defects, with clear terms for returns or replacements. Our supply chain includes both自有 brand products and access to international brands like NSK, allowing us to fulfill orders for specific models or equivalents based on your requirements.
Whether you need the exact model listed or an equivalent replacement, provide your required bearing type, dimensions, and quantity. Our team will confirm availability and deliver a quote tailored to your application. Early inquiry ensures faster processing and helps avoid delays in your project timeline.
Q: Do you supply bearings from other brands besides the ones listed?
A: Yes, we support procurement across all major international brands (including SKF, NTN, Koyo, NACHI) and domestic优质品牌, as well as custom specifications based on your requirements.
Q: How can I confirm if this bearing fits my equipment?
A: Provide your equipment model or existing bearing dimensions (inner diameter x outer diameter x width), and our technical team will verify compatibility with the 8x22x7 mm specification.
Q: What warranty coverage do you offer?
A: We provide a warranty against manufacturing defects.具体条款 are outlined in our sales agreement, with options for returns or replacements in case of quality issues.
Q: What is the minimum order quantity?
A: We accept low minimum order quantities, including small试单 orders, to accommodate both maintenance needs and large-scale production requirements.
Q: How quickly can you ship after ordering?
A: Most bearings are available from stock and ship within 1-3 business days. Shipping time depends on the selected method (courier, air, or sea freight).
Q: Do you offer OEM or ODM services?
A: Yes, we support custom bearing production (OEM/ODM) based on technical drawings, material specifications, or performance requirements provided by the customer.
Ready to order or need a quote?
Send the bearing model, dimensions (d x D x B), and quantity — we’ll get back to you with pricing and lead time.
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Official partner since 1998 with direct access to SKF technical resources, genuine products, and engineering expertise.
In-house team provides application design, failure analysis, and predictive maintenance -- reducing bearing failures by 35%.
Every product undergoes rigorous pre-shipment inspection with full documentation for traceability and compliance.
Dedicated account managers and reliable delivery networks ensure on-time supply for enterprise clients worldwide.
Performance Metrics
35%
Failures Prevented
70%
Downtime Reduction
25+
Years Experience
24h
Quote Response
78% of large enterprises prefer suppliers offering integrated technical support and lifecycle services.
Custom bearing selection and system design based on your specific load conditions, speeds, temperatures, and environmental factors.
Root-cause investigation of bearing failures using metallurgical testing, vibration analysis, and operating data review.
IIoT-enabled monitoring with smart sensor bearings for real-time vibration, temperature, and RPM tracking.
Modified bearings with special coatings, seals, tolerances, or materials. Lead time 8-12 weeks from official channels.
Certified engineers available for on-site installation support, alignment checks, and commissioning assistance worldwide.
Long-term service agreements including regular maintenance checks, replacement scheduling, and performance reporting.
Free samples available for orders over $50K
Validated against your KPIs before full production commitment.
-- Get In Touch
Our certified engineers will review your application requirements and provide a detailed quote within 24 hours.
Address
No. 377 Bansongyuan Road, Huangpu District, Shanghai, China
Free Sample Program
Orders over $50K qualify for free product samples
Test against your KPIs before full production commitment. Ask our engineers for details.
Regarding: NSK Cylindrical Roller Bearing N236em N238em N240em High Quality
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