行业组件数据 · 2026

测针球头

Precision spherical tip for coordinate measuring machine (CMM) probes, enabling accurate contact measurement of surfaces.

技术定义与适配语境
典型 测针球头 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 spherical stylus tip is a critical component of measurement probes used in coordinate measuring machines (CMMs) and other precision metrology systems. It serves as the contact point that physically touches the workpiece surface during dimensional inspection. The spherical geometry provides consistent contact geometry regardless of approach angle, allowing for accurate measurement of complex surfaces, contours, and features. These tips are manufactured to extremely tight tolerances to ensure measurement accuracy and repeatability.

组件规格

定义
A spherical stylus tip is a critical component of measurement probes used in coordinate measuring machines (CMMs) and other precision metrology systems. It serves as the contact point that physically touches the workpiece surface during dimensional inspection. The spherical geometry provides consistent contact geometry regardless of approach angle, allowing for accurate measurement of complex surfaces, contours, and features. These tips are manufactured to extremely tight tolerances to ensure measurement accuracy and repeatability.
工作原理
The spherical stylus tip operates on the principle of tactile contact measurement. When the CMM probe approaches a workpiece, the spherical tip makes physical contact with the surface. The machine records the precise coordinates of the contact point, using the known radius of the sphere to calculate the actual surface position. The spherical shape ensures that the contact point is always at a consistent distance from the probe center, regardless of the approach angle, enabling accurate measurement of complex geometries.
材料
Typically manufactured from synthetic ruby (aluminum oxide)tungsten carbidesilicon nitrideor industrial diamond. Ruby is most common due to its excellent wear resistancehardness (9 on Mohs scale)and chemical inertness. High-precision applications may use diamond tips for superior wear characteristics.
Diameter
0.3mm to 8mm (common range)
Hardness
1500-2000 HV (ruby)
Sphericity
≤0.1μm to 0.5μm
Surface Finish
Ra ≤0.01μm
Mounting Thread
M2, M3, M4 standard
Temperature Stability
Coefficient of thermal expansion: 6.5×10⁻⁶/K (ruby)
标准
ISO 10360ISO 14253DIN 32876ASME B89.4.1

行业分类与别名

测针球头 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

Abrasive contact with workpiece surfaces->Gradual wear changes tip diameter and sphericity->Use appropriate tip material (ruby/diamond), implement regular calibration, establish replacement schedules based on usage
Probe collision with workpiece or fixture->Tip deformation or catastrophic damage->Implement collision detection systems, proper probe path programming, operator training, use of breakaway mechanisms
Contamination buildup on tip surface->Inaccurate contact point measurement->Regular cleaning protocols, controlled environment, use of protective covers when not in use

工业生态与工程逻辑

0
Tip wear leading to measurement drift
1
Contamination affecting contact accuracy
2
Impact damage from collisions
3
Thermal expansion errors
4
Improper mounting causing runout

合规与检测

tolerance
Diameter tolerance: ±0.5μm to ±2μm, Sphericity: ≤0.1μm to 0.5μm depending on grade
test method
Laser interferometry for diameter and sphericity, roundness testing machines, optical comparator inspection, coordinate measuring machine verification

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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

Why are ruby balls commonly used for stylus tips?

Ruby (synthetic aluminum oxide) offers exceptional hardness (9 Mohs), excellent wear resistance, chemical inertness, and can be polished to extremely fine surface finishes, making it ideal for precision measurement applications.

How does tip diameter affect measurement accuracy?

Smaller tips can access tighter spaces and measure smaller features but are more susceptible to wear and deflection. Larger tips provide better durability and stability but may not access confined areas. The diameter must be compensated in measurement software.

What maintenance do stylus tips require?

Regular cleaning with isopropyl alcohol, visual inspection for damage or wear, periodic calibration checks, and replacement when sphericity exceeds tolerance or surface shows significant wear.

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