0
English
Español
中文简体
عربى
.01 Comprehensive Customization:
We provide full-process customization services from product design, material selection, sample making to mass production to meet customers' special specifications and functional requirements.
Submit
Submit feedback
Related Products
View All →
Technical Data
Shielded Miniature Carbon Steel Bearings Specifications
Comprehensive technical reference for small-bore consumer and light-duty applications.
Material & Miniature Construction
Bearing TypeMiniature Deep Groove, Shielded
Ring & Ball MaterialCarbon Steel (GCr6 Equivalent)
HardnessHRC 55 - 58
Cage TypeStamped Steel or Nylon
Shield ConfigurationZ (Single) or 2Z (Double)
Bore Range3mm - 10mm
Performance Characteristics
Speed RatingUp to 25,000 RPM (bore dependent)
Temperature Range-10°C to +100°C
Grease Fill20-30% Cavity Fill
Load RatingLight Duty
Precision GradeP0 Standard
Production VolumeHigh-Volume Automated
Use Cases
Ideal Applications
Consumer and light-duty applications where compact size and unit cost drive selection.
Toy & Hobby Motors
RC vehicle motors, toy mechanisms, and hobby drone motors use miniature carbon steel bearings for reliable rotation at consumer price points.
Small Electronics Cooling Fans
Laptop, PC, and small electronics cooling fans use compact shielded miniature bearings for quiet, low-cost fan hub rotation.
Fishing Reels & Sporting Goods
Fishing reel bearings and small sporting goods mechanisms use miniature bearings sized for compact, lightweight product design.
Handheld Power Tool Accessories
Small rotary tool bits and handheld accessory motors use miniature bearings for compact high-speed rotation in portable devices.
Model Making & Robotics Kits
Educational robotics kits and model-making mechanisms use cost-effective miniature bearings suited to hobbyist and educational budgets.
Small Household Gadgets
Electric shavers, small grooming devices, and handheld gadgets use miniature bearings for compact motor support within tight housings.
Why Carbon Steel Miniature Bearings?
Superior Advantages
Right-sized cost efficiency without sacrificing light-duty reliability.
25%
Lower Material Cost
Carbon steel raceways cost meaningfully less than chrome alloy steel while providing fully adequate hardness for light miniature-bearing duty.
25,000
Max RPM Rating
Small bore diameters combined with lightweight balls allow miniature bearings to achieve high rotational speeds within their light load rating.
3mm
Smallest Standard Bore
Precision small-scale tooling enables consistent quality production down to 3mm bore for the most compact consumer device designs.
High-Volume
Automated Consistency
Dedicated miniature production lines maintain dimensional consistency at the volumes required for automated consumer product assembly.
Shipping & Payment
Global logistics for shielded Miniature Carbon Steel Bearings orders.
Payment Terms
T/T (Wire Transfer): 30% deposit, 70% upon shipment.
L/C at Sight: Accepted for orders exceeding 5,000 pieces.
Open Account: Available for long-term OEM customers.
Shipping Methods
Sea Freight: FCL/LCL from Shanghai or Ningbo for bulk orders.
Air Express: DHL/FedEx for urgent samples and small batches.
Lead Time
Standard Bore Sizes: 10 – 18 days.
High-Volume OEM Orders: 18 – 28 days.
Custom Shield/Grease Spec: 20 – 30 days.
Frequently Asked Questions
Expert answers about shielded Miniature Carbon Steel Bearings.
Q: Why use carbon steel instead of chrome steel for miniature bearings?
A: For the light loads typical of toys, small electronics, and hobby devices, carbon steel provides fully adequate hardness and wear resistance at meaningfully lower material cost. Chrome steel's higher load capacity is simply unnecessary for these light-duty applications, so its added cost provides no functional benefit.
Q: What is the difference between Z and 2Z shielded miniature bearings?
A: Z (single shield) protects one face of the bearing, often used where the opposite face is protected by the housing design. 2Z (double shield) protects both faces, providing more complete contamination protection for fully exposed installations.
Q: Are carbon steel miniature bearings suitable for continuous industrial use?
A: No, these bearings are engineered specifically for light-duty consumer and hobby applications. For continuous industrial duty even at small bore sizes, chrome steel miniature bearings with higher load capacity are the appropriate choice.
Q: How small a bore size can be manufactured reliably at volume?
A: Our standard production range extends down to 3mm bore with full dimensional consistency at high volume; smaller specialty sizes may be available on request with extended lead time for tooling qualification.
Q: What hardening process is used for carbon steel miniature raceways?
A: Carburizing or induction hardening is applied to achieve a hardened wear surface on the raceway while retaining a tougher core, providing HRC 55-58 surface hardness suitable for light-duty rolling contact fatigue resistance.
Q: What grease is standard for miniature bearings?
A: Standard fill is a low-viscosity lithium grease selected for smooth operation across small ball diameters and the wide speed range typical of consumer motor applications, rated for -10°C to +100°C.
Q: Can miniature bearings be supplied without shields for lower friction?
A: Yes, open (unshielded) miniature bearings are available where the customer's housing design already provides adequate contamination protection and minimum friction is prioritized.
Q: What precision grade is standard for miniature carbon steel bearings?
A: P0 (standard) precision grade is typical, matched to the light-duty, cost-sensitive nature of the target applications; higher precision grades are available on request for specific speed or vibration requirements.
Q: What is the minimum order quantity for miniature bearings?
A: Standard MOQ is 2,000 pieces for common stocked bore sizes, reflecting the high-volume nature of consumer and toy manufacturing. Smaller development quantities may be available for new product prototyping.
Q: Can bearings be supplied on reels or trays for automated assembly?
A: Yes, bulk tray, tube, or reel packaging compatible with automated pick-and-place assembly equipment is available for high-volume consumer product manufacturing lines.
Q: Do you offer stainless steel miniature bearings as an alternative?
A: Yes, stainless steel miniature bearings are available for applications requiring corrosion resistance, though at a cost premium over the standard carbon steel construction covered by this product line.
Q: What is the typical lead time for a first trial order?
A: Standard stocked bore sizes typically ship within 10-18 days for trial quantities, with high-volume production orders scheduled 18-28 days depending on total quantity and shield configuration.
General Information
Key specifications and ordering details.
| MOQ | 2,000 Pieces |
| Lead Time | 10 – 30 Days |
| Packaging | Bulk Tray / Reel / Tube Packaging |
| Certifications | ISO 9001 |
| Materials | Carbon Steel (GCr6 Equivalent) |
| Customization | Bore Size, Shield Type, Grease |
ABOUT US
Zhejiang Yingfei Biotechnology Co., Ltd.
is China Shielded Miniature Carbon Steel Bearings Manufacturers and Wholesale Shielded Miniature Carbon Steel Bearings Factory that combines industry and trade. Its subsidiary, Ningbo Kaifei Machinery Technology Co., Ltd., has passed the GB/T 19001-2016/ISO 9001:2015 international quality system certification and is committed to producing precision bearings and fasteners made of stainless steel, carbon steel, and bearing steel. The company uses high-quality steel materials and implements fine craftsmanship production processes. It is a diversified and professional production base for casting in China, based on high-end and high-end markets, with an annual output of 2400000 sets. It is mainly exported to dozens of countries in Europe, America, Asia, Africa, and other regions, and is widely used in the fields of motors, home appliances, sports equipment, automobiles, mechanical rotation, furniture, strollers, water pumps, toys, etc. Our company adheres to the business philosophy of "paying attention to details, integrity, and efficiency". While developing, we continuously strengthen and enrich our company's technical strength, improve and perfect after-sales service, logistics distribution, and market promotion. Ensure high-quality products and a reliable reputation to serve domestic and international markets. Standardize oneself, be meticulous, strictly demand, and enhance the understanding and trust of partners. Establish good cooperative relationships with customers.
01
10 YEARS INDUSTRY EXPERIENCE
02
8700m² advanced factory
03
15 high-tech professionals
04
Annual production: 2.4 million sets
Quality Assurance
Miniature Bearing Consistency Assurance
Rigorous quality protocols ensure dimensional consistency at high production volumes.
1
Small-Bore Grinding Precision Control
Dedicated miniature grinding lines maintain tight dimensional tolerance at the reduced scale of 3-10mm bore production.
2
Automated Ball Sorting & Assembly
Precision ball sorting equipment ensures consistent ball diameter matching for smooth, low-vibration miniature bearing assembly.
3
Shield Press-Fit & Running Torque Testing
Sample batches are tested for shield retention and running torque to confirm consistent quality across high-volume production runs.
Testing & Certifications
Comprehensive testing protocols for miniature bearing validation.
1
Dimensional Consistency Sampling
High-frequency CMM sampling throughout production confirms bore, OD, and width consistency required for automated assembly line compatibility.
2
Running Torque & Noise Testing
Sample bearings are tested for free-running torque and noise level to confirm smooth operation suited to consumer product acoustic expectations.
3
Shield Retention Testing
Shield press-fit retention is pull-tested to confirm shields remain securely seated under the light vibration typical of consumer device use.
4
Hardness Verification
Rockwell hardness testing confirms raceway surface hardness meets the HRC 55-58 specification for adequate light-duty wear resistance.
5
Grease Fill Consistency Check
Automated grease dispensing is weight-verified to confirm consistent 20-30% cavity fill across the full production batch.
6
Speed & Vibration Testing
Sample bearings are tested at rated maximum speed to confirm smooth, low-vibration operation appropriate for consumer motor applications.
Carbon Steel vs Chrome Steel Miniature Bearing Comparison
Understand when carbon steel construction is the appropriate cost-effective choice.
| Feature | Chrome Steel Miniature Bearing | Carbon Steel Miniature (Our Grade) |
|---|---|---|
| Material Cost | Higher | 25% Lower |
| Load Capacity | Higher | Adequate for Light Duty |
| Surface Hardness | HRC 60-64 | HRC 55-58 |
| Best Application | Industrial Light Duty | Consumer / Toy / Hobby |
| Volume Pricing | Standard Tiers | Consumer OEM Volume Tiers |
| Cost Multiplier | 1.0x (baseline) | 0.75-0.80x |
Expert Insight: Chrome steel miniature bearings remain the right choice for light industrial applications where load margin and long service life under continuous duty matter. For the vast majority of toys, consumer electronics, and hobby devices where loads are genuinely light and cost per unit is the dominant purchasing factor, carbon steel miniature bearings deliver fully adequate performance at a meaningfully lower price, making them the practical default for high-volume consumer product manufacturing.
Quality Creates The Future
-
-
.02 Flexible Production Capacity:With an advanced production base of 8,700 square meters and rich technical experience, we are able to respond quickly to customer needs, whether it is small batch customization or large-scale mass production.
-
.03 Quality Assurance:We strictly follow the GB/T 19001-2016/ISO9001:2015 quality management system. Each customized product undergoes strict quality inspection to ensure that it meets the high standards of customers.
-
.04 Experienced Technical Team:Our internal technical team consists of experienced engineers and designers who can provide professional technical support to help you optimize product design and improve production efficiency.
-
.05 Global Service Network:We have a stable supply chain and sales network around the world to ensure that your products can enter the market quickly and receive timely after-sales service.
About Miniature Bearing Customization
Shielded miniature carbon steel bearings can be tailored in bore size, shield configuration, and grease type to match your specific consumer device or hobby motor design. We support high-volume OEM design-in engineering collaboration.
- 1Device Design Review: Assess your motor or mechanism's bore requirement, speed, and load to confirm optimal miniature bearing specification.
- 2Shield Configuration Selection: Determine Z, 2Z, or open configuration based on your housing's existing contamination protection level.
- 3Grease Formulation Matching: Select grease viscosity and temperature range based on your device's operating environment and speed profile.
- 4Prototype Sample Validation: Initial bearings manufactured and tested in your actual assembly for fit and performance confirmation.
- 5High-Volume Production Setup: Automated grinding and assembly tooling configured for your production volume and packaging requirements.
- 6Packaging Format Confirmation: Bulk tray, tube, or reel packaging configured to match your automated assembly line requirements.
- 7Ongoing Quality Sampling: Continuous dimensional and torque sampling throughout production to maintain consistency at consumer OEM volumes.
- 8Technical Documentation: Full specification sheets and compliance documentation provided to support your product certification process.
Products
CONTACT Us
+86-13362474260 +86-0574-63322565
No. 98 Xinlang Road, Langxia Street, Yuyao City, Zhejiang Province, China
Mobile Site
Copyright© Zhejiang Yingfei Biotechnology Co., Ltd. All Rights Reserved
Wholesale Shielded Miniature Carbon Steel Bearings Manufacturers