行业组件数据 · 2026

紧定螺钉

A set screw is a type of fastener used to secure an object within or against another object, typically without a protruding head.

技术定义与适配语境
典型 紧定螺钉 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 set screw is a threaded fastener designed to be inserted into a threaded hole in one component to bear against another component, preventing relative motion between them. In motor hub applications, it secures components like gears, pulleys, or couplings to the shaft by applying compressive force through its tip, which may be flat, cone, cup, or dog point shaped. It functions without a nut and often sits flush or below the surface.

组件规格

定义
A set screw is a threaded fastener designed to be inserted into a threaded hole in one component to bear against another component, preventing relative motion between them. In motor hub applications, it secures components like gears, pulleys, or couplings to the shaft by applying compressive force through its tip, which may be flat, cone, cup, or dog point shaped. It functions without a nut and often sits flush or below the surface.
工作原理
The set screw works by applying axial clamping force through its threaded engagement in a tapped hole. When tightened, its tip presses against the shaft (or another surface), creating friction and mechanical interference that prevents rotational or axial movement. In motor hubs, this secures mounted components to the shaft, ensuring torque transmission and alignment.
材料
Typically made from alloy steel (e.g.ASTM A574grade 8.8 or 12.9)stainless steel (e.g.AISI 304 or 316)or brass. Common coatings include zinc platingblack oxideor dichromate for corrosion resistance.
Length
5mm to 50mm
Hardness
HRC 28-45 depending on grade
Tip Type
Cup point (common for high grip)
Head Type
Socket head (hex key drive)
Thread Size
M3 to M12 common
Torque Specification
Varies by size and material (e.g., M6: 10-15 Nm)
标准
ISO 4026ISO 4027ISO 4028DIN 913DIN 914

行业分类与别名

紧定螺钉 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

Incorrect torque application->Screw loosens, causing component misalignment or detachment->Use calibrated torque wrenches and follow manufacturer specifications; apply thread-locking adhesive if needed
Material fatigue or corrosion->Screw breaks or seizes, requiring replacement and downtime->Select corrosion-resistant materials (e.g., stainless steel), apply protective coatings, and implement regular maintenance checks
Improper tip or size selection->Inadequate grip leads to slippage and reduced machine efficiency->Choose tip type (e.g., cup point for shafts) based on application; verify dimensions against engineering drawings

工业生态与工程逻辑

0
Over-tightening causing thread stripping
1
Insufficient torque leading to slippage
2
Corrosion in harsh environments
3
Tip wear reducing grip over time

合规与检测

tolerance
Thread tolerance per ISO 965-1 (e.g., 6g for external threads), length tolerance ±0.5mm
test method
Torque testing per ISO 16047, hardness testing per ISO 6508, salt spray testing per ISO 9227 for corrosion resistance

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 difference between a set screw and a regular screw?

A set screw typically has no protruding head and is designed to secure an object within another, often using a tip that digs into the surface, whereas regular screws have heads for driving and are used to join components together.

How do I choose the right set screw for a motor hub?

Consider shaft material, required torque, environmental conditions (e.g., corrosion), and tip type (e.g., cup point for high vibration). Match thread size to the tapped hole and ensure proper hardness and length for secure fastening.

Can set screws be reused?

Limited reuse is possible if undamaged, but repeated tightening can wear the tip or threads, reducing clamping force. Inspect for deformation and replace if in doubt, especially in critical applications like motor hubs.

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CNFX Industrial Component Index · 机械和设备制造

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: 紧定螺钉

说明目标数量、应用场景、交期和关键技术要求,用于准备 RFQ 或供应商评估。

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URN:CNFX:ME:UNIT:SET_SCREW