行业组件数据 · 2026

放气螺丝

A precision screw used in brake calipers to release air from hydraulic brake systems during maintenance.

技术定义与适配语境
典型 放气螺丝 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。

A specialized threaded fastener designed for brake calipers that provides a controlled opening to purge trapped air from hydraulic brake lines during bleeding procedures. It features a tapered sealing surface and precise thread geometry to maintain system integrity while allowing fluid flow when opened.

组件规格

定义
A specialized threaded fastener designed for brake calipers that provides a controlled opening to purge trapped air from hydraulic brake lines during bleeding procedures. It features a tapered sealing surface and precise thread geometry to maintain system integrity while allowing fluid flow when opened.
工作原理
The bleeder screw operates on a simple valve principle: when tightened, its tapered tip creates a metal-to-metal seal against the caliper body, preventing fluid leakage. When loosened, it creates a small passage that allows air bubbles to escape while brake fluid flows through, following the principle of hydraulic pressure equalization.
材料
Typically made from corrosion-resistant steel alloys (such as SAE 1018 or 1045 carbon steel with zinc platingor stainless steel 304/316)brassor aluminum alloys. High-performance versions may use titanium or specialized coatings for extreme conditions.
Length
15-25mm typical
Head Type
Hex socket (Allen), external hex, or slotted
Thread Size
M7x1.0, M8x1.0, M10x1.0, or 3/8-24 UNF
Sealing Method
Tapered seat (conical) or crush washer
Pressure Rating
Withstands up to 2000 psi (138 bar)
Torque Specification
8-15 Nm (6-11 ft-lbs)
标准
ISO 4032DIN 934SAE J429ISO 898-1

行业分类与别名

放气螺丝 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

Corrosion due to exposure to moisture and road salts->Screw seizes in caliper, preventing brake bleeding->Use corrosion-resistant materials, apply anti-seize compound, implement regular maintenance schedules
Over-torquing during installation->Thread damage or screw shearing->Use calibrated torque wrenches, follow manufacturer specifications, train technicians properly
Worn sealing surfaces->Brake fluid leakage leading to reduced braking performance->Replace screws during brake service, inspect sealing surfaces, use proper replacement parts

工业生态与工程逻辑

0
Thread stripping during installation
1
Corrosion leading to seizure
2
Improper sealing causing brake fluid leaks
3
Shearing during removal if corroded

合规与检测

tolerance
Thread tolerance: 6g per ISO 965-1, dimensional tolerance: ±0.1mm
test method
Pressure testing per SAE J1703, corrosion resistance per ASTM B117 salt spray test, torque-to-failure testing

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 happens if a bleeder screw is overtightened?

Overtightening can strip threads in the caliper body, damage the tapered sealing surface, or cause the screw to shear off, requiring caliper replacement.

Can bleeder screws be reused?

While technically reusable, replacement is recommended during brake service as the sealing surfaces degrade over time, increasing risk of fluid leaks.

Why do some bleeder screws have different thread sizes?

Thread sizes vary by vehicle manufacturer, caliper design, and brake system pressure requirements to ensure proper sealing and compatibility.

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CNFX Industrial Component Index · 汽车制造

数据基础

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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: 放气螺丝

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URN:CNFX:ME:UNIT:BLEEDER_SCREW