行业组件数据 · 2026

轴孔

Precision-machined bore in a hub or center plate for shaft mounting and torque transmission

技术定义与适配语境
典型 轴孔 会按材料、尺寸公差、适配关系和失效风险在 机械和设备制造 中评估。

A shaft bore is a cylindrical opening precisely machined into a hub or center plate component to accommodate a rotating shaft. This critical interface enables torque transmission, radial load support, and rotational alignment between connected mechanical elements. The bore's dimensional accuracy, surface finish, and geometric tolerances directly impact system performance, vibration characteristics, and service life.

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组件规格

定义
A shaft bore is a cylindrical opening precisely machined into a hub or center plate component to accommodate a rotating shaft. This critical interface enables torque transmission, radial load support, and rotational alignment between connected mechanical elements. The bore's dimensional accuracy, surface finish, and geometric tolerances directly impact system performance, vibration characteristics, and service life.
工作原理
The shaft bore functions as a mechanical interface that transfers rotational motion and torque from the shaft to the hub/center plate through interference fit, keyway, or spline connections. It maintains concentric alignment, distributes radial loads evenly, and prevents relative motion between components during operation. Proper bore design ensures minimal clearance or controlled interference to optimize power transmission efficiency while preventing fretting, wear, or fatigue failure.
材料
Typically manufactured from medium-carbon steels (AISI 10454140)alloy steels (AISI 4340)or ductile iron (65-45-12). Surface treatments may include induction hardening (HRC 50-55)nitridingor chrome plating for wear resistance. Corrosion-resistant applications use stainless steels (AISI 304316) or aluminum alloys (6061-T6).
Bore Diameter
10-500 mm (standard range)
Concentricity
0.01-0.05 mm TIR
Surface Finish
Ra 0.8-3.2 μm
Tolerance Class
H7, H8, or interference fits (p6, s7)
Keyway Standards
ANSI B17.1, DIN 6885
Spline Standards
ANSI B92.1, DIN 5480
标准
ISO 286DIN 7154ISO 1101DIN 7184

行业分类与别名

轴孔 的常用贸易名称、技术标识和检索关键词。

shaft borehub borecenter plate boreprecision machininginterference fitkeyway designspline connectionbore tolerancemechanical interfacetorque transmission轴孔Shaft Bore机械和设备制造 轴孔

上级产品

该组件会出现在以下整机或工业产品中。

轮毂/中心板
叶轮或叶片组件的核心结构部件，用于将叶片连接到旋转轴上。
查看产品详情 ->

FMEA · 风险与缓解

诱因 → 失效模式 → 工程缓解

Inadequate interference fit design->Shaft slippage under peak torque loads->Calculate required interference using Lame's equations; implement quality control for bore diameter measurements
Poor surface finish or contamination->Fretting corrosion and crack initiation->Specify Ra ≤ 1.6 μm; implement cleaning protocols; consider protective coatings
Misalignment during assembly->Eccentric loading and premature bearing failure->Use alignment fixtures; verify concentricity with dial indicators; implement laser alignment systems

工业生态与工程逻辑

兼容对象
GearboxesPumpsCompressorsConveyor drivesIndustrial fansElectric motors
可替换件
SKFTimkenNTNBaldorSiemensABB
0
Concentricity deviation causing vibration
1
Improper fit leading to slippage or fatigue failure
2
Surface damage during assembly/disassembly
3
Corrosion at shaft-bore interface

合规与检测

tolerance
ISO 286 tolerance grades for holes (IT6-IT8); geometric tolerances per ISO 1101 for straightness, roundness, and concentricity
test method
CMM measurement for dimensional accuracy; surface profilometry for finish; ultrasonic testing for material integrity; go/no-go gauges for production verification

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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。

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检修盖
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常见问题

What is the difference between clearance fit and interference fit for shaft bores?

Clearance fits (H7/g6) allow easy assembly/disassembly with minimal friction, suitable for low-torque applications. Interference fits (H7/s6) create permanent connections through elastic deformation, providing higher torque capacity but requiring hydraulic/press fitting equipment.

How does bore surface finish affect performance?

Surface finish (Ra value) impacts friction, wear, and fatigue life. Smoother finishes (Ra 0.8-1.6 μm) reduce fretting corrosion and improve fatigue resistance in dynamic applications, while rougher finishes may retain lubrication better in certain conditions.

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CNFX Industrial Component Index · 机械和设备制造

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URN:CNFX:ME:UNIT:SHAFT_BORE