行业组件数据 · 2026

轴承盖

Bearing caps are precision components that secure bearings within differential carriers, maintaining alignment and load distribution in automotive drivetrains.

技术定义与适配语境
典型 轴承盖 会按材料、尺寸公差、适配关系和失效风险在 汽车制造 中评估。

Bearing caps are structural components designed to house and secure tapered roller or ball bearings within a differential carrier assembly. They provide precise axial and radial positioning of bearings, ensuring proper gear mesh alignment, load distribution, and lubrication retention in automotive differential systems. These caps withstand significant torsional and axial forces while maintaining dimensional stability under thermal cycling.

组件规格

定义
Bearing caps are structural components designed to house and secure tapered roller or ball bearings within a differential carrier assembly. They provide precise axial and radial positioning of bearings, ensuring proper gear mesh alignment, load distribution, and lubrication retention in automotive differential systems. These caps withstand significant torsional and axial forces while maintaining dimensional stability under thermal cycling.
工作原理
Bearing caps function by creating a rigid housing that constrains bearing outer races, preventing axial movement while allowing controlled radial expansion. They distribute operational loads evenly across the bearing surface, maintain preload settings through precise bolt torque specifications, and provide sealing surfaces for gaskets or seals to retain lubricants.
材料
Typically forged or cast alloy steel (e.g.SAE 41404340) or ductile iron (e.g.Grade 65-45-12). Heat treatment to 28-32 HRC for strength. Machined surfaces have Ra 1.6-3.2 μm finish.
Bolt Size
M10-M14
Weight Range
1.5-3.5 kg
Bolt Circle Diameter
120-180 mm
Flatness Requirement
0.05 mm max
Torque Specification
80-120 Nm
Bearing Bore Tolerance
H7
标准
ISO 286-2DIN 3760SAE J429

行业分类与别名

轴承盖 的常用贸易名称、技术标识和检索关键词。

上级产品

该组件会出现在以下整机或工业产品中。

FMEA · 风险与缓解

诱因 → 失效模式 → 工程缓解

Insufficient bolt torque->Bearing cap loosening leading to bearing movement and gear misalignment->Use calibrated torque wrenches with angle measurement, apply thread locking compound, implement torque-to-yield bolts
Thermal cycling stress->Micro-cracking in high-stress areas leading to catastrophic failure->Implement finite element analysis in design, use stress-relieved materials, add radius to sharp corners
Improper bearing seat machining->Bearing misalignment causing premature bearing failure and gear noise->Maintain H7 tolerance on bearing bores, implement CMM verification, use honing for final finish

工业生态与工程逻辑

0
Bolt fatigue failure
1
Bearing seat wear leading to misalignment
2
Thermal distortion under heavy load
3
Improper torque causing bearing preload loss

合规与检测

tolerance
Bearing bore: H7, Bolt holes: H12, Flatness: 0.05 mm, Parallelism: 0.03 mm
test method
Dimensional verification via CMM, magnetic particle inspection for cracks, bolt hole circularity testing, thermal cycling validation

制造该组件的工厂

来自 CNFX 组件能力表的相关制造商资料。

制造商列表用于前期研究和供应商能力理解,不代表认证、排名或交易担保。

采购评估维度

不是客户评论,也不是实时热度。以下维度用于前期 RFQ 准备和供应商评估。

技术文档
4/5
制造能力
4/5
可检验性
5/5
供应商透明度
3/5

这些分值是采购评估维度示例,不代表真实客户评分、具体国家买家反馈或实时询盘。

相关组件

常见问题

What is the primary function of a bearing cap in a differential carrier?

The bearing cap secures the differential bearings in precise alignment, distributes operational loads, maintains bearing preload, and provides sealing surfaces for lubricant retention.

Why are bearing caps typically made from alloy steel?

Alloy steel provides the necessary strength-to-weight ratio, fatigue resistance, and dimensional stability required to withstand differential torque loads and thermal cycling without deformation.

How often should bearing caps be inspected?

During every differential service interval (typically 50,000-100,000 km) for cracks, bolt hole elongation, bearing seat wear, and flatness verification.

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CNFX Industrial Component Index · 汽车制造

数据基础

CNFX 制造商资料、技术分类、公开产品信息和持续合理性检查。

初步技术归类
本页用于结构化准备研究、RFQ 和供应商评估,不替代买方自己的供应商资质审查、标准核验和技术批准。

请求制造能力信息: 轴承盖

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URN:CNFX:ME:UNIT:BEARING_CAPS