OEM/ODM SR4 ZZ Miniature Bearing Dual Dust Shield Design for Precision Instruments

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2/13/2026

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 Miniature Bearing Dual Dust Shield Design for Precision Instruments

10 - 999 pieces $0.61
1000 - 4999 pieces $0.51
>=5000 pieces $0.41

SR4 ZZ is suitable for devices such as angle grinders, vacuum cleaners, hair dryers, sweeping robots, massagers, and blender machines.

Model: SFR4(440) ZZ

Size: 6.35*15.875*4.98

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 a deep groove ball bearing, structured with an outer ring, inner ring, steel ball cage, and pressed steel shields on both sides (ZZ denotes dual metal seals), typically pre-lubricated for lifelong service.

Key performance features:

It features low friction, high-speed capability, and the capacity to handle radial and moderate bidirectional axial loads. The dual shields effectively block contaminants, offering long service life, low maintenance, and cost-effectiveness.

Main application scenarios:

The SR4 ZZ bearing is widely used in small motors, office equipment (e.g., printers), household appliances, precision instruments, and medical devices where compact space and cleanliness are critical.

Obtain Certificate / 证书:

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 / Modelo）:	SFR4(440)
Shield（防尘盖 / Tampa de Proteção / Tampa Antipó）:	ZZ
Precision Rating（精度等级 / Classe de Precisão / Grau de Precisão）:	P5
Z standard（国标振动噪音 / Ruído e Vibração - Padrão Nacional (GB) ）:	Z2
V standard（行标振动噪音 / Ruído e Vibração - Padrão Setorial (JB) ）:	V1
Clearance（游隙 / Folga Interna / Jogo Radial）:	C0
d（内径 / Diâmetro Interno）:	6.35
D（外径 / Diâmetro Externo）:	15.875
B1（高B1 / Altura / Espessura）:	4.98
Weight（重 / Peso）:	8
Material（材料 / Material）:	Stainless Steel不锈钢
Lubrication（润滑方式定制 / Personalização do Método de Lubrificação）:	联系客服Contact Customer Service
Flange Outside Diameter B1（法兰外径B1 / Diâmetro Externo do Flange）:	17.526
Flange Width B1（法兰宽度B1 / Largura do Flange）:	4.98
Flange C（法兰厚度C / Espessura do Flange）:	1.067
Standard Type:	non-standard parts