行业组件数据 · 2026

定心夹爪

Centering jaws are precision clamping components used in centering mechanisms to align and secure workpieces during machining operations.

技术定义与适配语境
典型 定心夹爪 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。

Centering jaws are specialized mechanical components designed to provide precise radial alignment and secure clamping of cylindrical or symmetrical workpieces in machine tools, particularly in lathes, milling machines, and CNC machining centers. They function as part of a centering mechanism that ensures the workpiece is accurately positioned relative to the machine's rotational or linear axes, minimizing runout and improving machining accuracy. These jaws typically feature hardened contact surfaces and adjustable mechanisms to accommodate various diameters while maintaining consistent centering force.

组件规格

定义
Centering jaws are specialized mechanical components designed to provide precise radial alignment and secure clamping of cylindrical or symmetrical workpieces in machine tools, particularly in lathes, milling machines, and CNC machining centers. They function as part of a centering mechanism that ensures the workpiece is accurately positioned relative to the machine's rotational or linear axes, minimizing runout and improving machining accuracy. These jaws typically feature hardened contact surfaces and adjustable mechanisms to accommodate various diameters while maintaining consistent centering force.
工作原理
Centering jaws operate on the principle of simultaneous radial movement toward a common center point. When activated (mechanically, hydraulically, or pneumatically), multiple jaws move symmetrically inward or outward to contact the workpiece circumference at equidistant points. This synchronized motion ensures the workpiece's geometric center aligns with the machine spindle axis. The clamping force is distributed evenly around the circumference, preventing distortion while providing secure holding for machining forces.
材料
Typically made from alloy steel (e.g.AISI 41404340) or tool steel (e.g.D2A2) with surface hardening to 45-60 HRC. Wear-resistant coatings like titanium nitride (TiN) or chromium nitride (CrN) may be applied. High-precision versions may use carbide inserts at contact points.
Actuation
Manual, hydraulic, or pneumatic
Jaw Quantity
2, 3, or 4 jaws
Mounting Type
A2-5, A2-6, or custom flange
Repeatability
±0.005-0.02 mm
Clamping Force
500-5000 N per jaw
Max Workpiece Diameter
50-300 mm
标准
ISO 12164-1DIN 55027

行业分类与别名

定心夹爪 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

Accumulated wear on jaw contact surfaces->Loss of centering accuracy exceeding 0.02 mm TIR->Implement regular inspection schedule, use wear-resistant coatings, maintain proper lubrication
Incorrect torque on mounting bolts->Jaw slippage during operation causing catastrophic failure->Use calibrated torque wrenches, implement bolt tension monitoring, follow manufacturer torque specifications

工业生态与工程逻辑

0
Incorrect jaw selection causing workpiece deformation
1
Wear leading to loss of concentricity
2
Insufficient clamping force during heavy machining
3
Compatibility issues with machine interface

合规与检测

tolerance
Radial runout ≤ 0.01 mm at 100 mm from face, axial parallelism ≤ 0.005 mm/100 mm
test method
ISO 230-1 test code for geometric accuracy, dial indicator measurement at multiple points, laser alignment verification

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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 difference between 2-jaw and 3-jaw centering mechanisms?

2-jaw systems provide faster loading/unloading but may not center perfectly round workpieces; 3-jaw systems offer better concentricity for cylindrical parts but require more complex mechanisms. 4-jaw systems provide maximum stability for heavy machining.

How often should centering jaws be inspected for wear?

Inspect contact surfaces every 500 operating hours or monthly in continuous production. Replace or recondition jaws when wear exceeds 0.05 mm or when concentricity errors exceed machine tolerance specifications.

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CNFX Industrial Component Index · 机械和设备制造

数据基础

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初步技术归类
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URN:CNFX:ME:UNIT:CENTERING_JAWS