OEM/ODM SR4 ZZ Double Sealed Miniature Deep Groove Ball Bearing | 6.35*15.875*4.978mm Stainless Steel

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3/2/2026

About Us

Ningbo Zhouxin International Trade Co., Ltd. was established in 2025, headquartered in Ningbo, an open coastal city in eastern China, focusing on technology development and global sales in the field of bearings and hardware accessories. The company relies on the strong manufacturing foundation of its parent company ------ 12,000 ㎡ modern production plant, 70+ automated production lines, 100+ professional technical team, 10+ years of precision manufacturing experience, and ISO/RoHS/CE certification. Products are widely used in fields such as household appliances, food machinery, fitness equipment, power tools, motor vehicles, medical devices, and robotics.Core Corporate Advantages: ▸ Precision & Stability Genes: 22 full-chain quality inspection processes strictly control tolerances to ±0.01mm. ▸ Customized Services: ODM/OEM flexible production. ▸ Resource Synergy Network: Sharing parent company's large-scale intelligent production lines, ensuring delivery of tens of millions of orders.

SR4 ZZ Double Sealed Miniature Deep Groove Ball Bearing | 6.3515.8754.978mm Stainless Steel | For Power Tools & Precision Instruments

10 - 999 pieces $0.44
1000 - 4999 pieces $0.37
>=5000 pieces $0.30

The SR4 ZZ bearing is widely used in motors, power tools, household appliances, railways, aerospace, automotive, engineering machinery, CNC machine tools, various precision instruments, and mechanical equipment.

Model: SR4(440) ZZ

Size: 6.35*15.875*4.978

Material: Stainless Steel

Precision Rating: P5

Lubrication: Contact Customer Service

Customization Available: True

Lead Time: standard models shipped within 10 business days.

Payment Terms: 100% T/T, or 30% T/T in advance, 70% before delivery

Product Structure
The SR4 ZZ bearing is an imperial miniature deep groove ball bearing with standard dimensions of 6.35 mm inner diameter, 15.875 mm outer diameter, and 4.978 mm thickness. This bearing features a double-sided dust seal design (ZZ) and is typically made of stainless steel (such as AISI 440 or 440C), offering corrosion and rust resistance. It is suitable for applications requiring high dust protection and corrosion resistance, including precision instruments, micro motors, household appliances, and power tools.

Key Performance Features of SR4 ZZ
This bearing provides low friction, high-speed operation capability, and the ability to withstand radial and moderate bidirectional axial loads. Its double-sided dust seal design effectively blocks contaminants, ensuring a long service life, low maintenance requirements, and cost-effectiveness.

Main Application Scenarios

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About US / 关于我们

> Precision & Stability Genes: 22 full-chain quality inspection processes strictly control tolerances to ±0.01mm.

> Customized Services: ODM/OEM flexible production.

> Resource Synergy Network: Sharing parent company's large-scale intelligent production lines, ensuring delivery of tens of millions of orders.

宁波轴心国际贸易有限公司成立于2025年，总部位于中国东部沿海开放城市宁波，专注轴承及五金配件领域的技术开发与全球销售。依托母公司雄厚的制造基础——12000㎡现代化生产厂房、70+自动化产线、100+专业技术团队，10+年精密制造经验，并通过ISO/RoHS/CE认证，产品广泛应用于家电、食品机械、健身器材、电动工具、机动车辆、医用器械企业核心优势：

> 精密稳定基因：22道全链质检工序严控公差±0.01mm

> 定制化服务：ODM/OEM柔性

> 资源协同网络：共享母公司规模化智能产线，保障千万级

Contact 立即联系

Model（型号）:	SR4(440)
Shield（防尘盖）:	ZZ
Precision Rating（精度等级）:	P5
d（内径）:	6.35
D（外径）:	15.875
B1（高）:	4.978
Weight（重）:	15
Material（材料）:	Stainless Steel不锈钢
Lubrication（润滑方式(定制)）:	联系客服Contact Customer Service
Standard Type:	Standard parts