行业组件数据 · 2026

正时齿轮(外置)

External timing gears are precision-engineered components that synchronize rotational motion between shafts in rotating lobe assemblies, ensuring accurate timing and power transfer in industrial machinery.

技术定义与适配语境
典型 正时齿轮(外置) 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。

External timing gears are mechanical components featuring precisely cut teeth on their outer circumference, designed to mesh with other gears to maintain synchronized rotation between connected shafts. In rotating lobe assemblies, these gears ensure that lobes rotate in precise phase alignment, critical for applications like pumps, compressors, and processing equipment where timing directly impacts performance, efficiency, and product quality. They are typically mounted externally for accessibility, maintenance, and adjustment.

组件规格

定义
External timing gears are mechanical components featuring precisely cut teeth on their outer circumference, designed to mesh with other gears to maintain synchronized rotation between connected shafts. In rotating lobe assemblies, these gears ensure that lobes rotate in precise phase alignment, critical for applications like pumps, compressors, and processing equipment where timing directly impacts performance, efficiency, and product quality. They are typically mounted externally for accessibility, maintenance, and adjustment.
工作原理
External timing gears operate on the principle of positive displacement through gear meshing. As one gear (driven by a power source) rotates, its teeth engage with the teeth of a mating gear, transmitting torque and rotational motion while maintaining a fixed speed ratio. This ensures that connected shafts (and attached lobes) rotate in exact synchronization, preventing phase drift that could cause operational failures. The external mounting allows for visual inspection, lubrication, and timing adjustments without disassembling the core machine.
材料
Typically manufactured from alloy steels (e.g.AISI 41404340) for high strength and wear resistanceoften heat-treated (carburized or induction hardened) to achieve surface hardness of 58-62 HRC. Alternative materials include stainless steels (e.g.316 stainless) for corrosive environmentscast iron for cost-effective applicationsor engineered polymers (e.g.PEEKnylon) for lightweightlow-noise operations. Coatings like nitriding or DLC (Diamond-Like Carbon) may be applied to enhance durability.
Module
2-10 mm
Backlash
0.05-0.20 mm
Face Width
20-150 mm
Accuracy Grade
ISO 1328 Class 6-8
Pitch Diameter
50-500 mm
Pressure Angle
20°
Surface Finish
Ra 0.8-1.6 μm
Number of Teeth
20-100
标准
ISO 1328DIN 3960AGMA 2000JIS B 1702

行业分类与别名

正时齿轮(外置) 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

Insufficient lubrication or contamination->Accelerated tooth wear and pitting->Implement scheduled lubrication with high-quality grease/oil and use sealed gear covers to prevent contamination.
Shaft misalignment during installation->Uneven load distribution and premature gear failure->Use laser alignment tools during assembly and conduct periodic alignment checks as part of maintenance routines.
Overloading beyond design limits->Tooth bending or breakage->Install torque limiters or overload protection devices and ensure operational loads stay within specified gear ratings.

工业生态与工程逻辑

0
Tooth wear leading to timing inaccuracies
1
Misalignment causing excessive vibration
2
Inadequate lubrication resulting in overheating and failure
3
Backlash increase affecting synchronization precision

合规与检测

tolerance
Gear tooth profile tolerance per ISO 1328 Class 7, backlash tolerance of ±0.05 mm, and runout tolerance within 0.02 mm TIR
test method
Coordinate measuring machine (CMM) for dimensional accuracy, hardness testing per Rockwell scale, dynamic load testing on gear test rigs, and NDT methods like magnetic particle inspection for defect detection

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 primary function of external timing gears in rotating lobe assemblies?

They synchronize the rotation of lobes to maintain precise phase alignment, ensuring efficient operation in applications like pumps and compressors where timing affects output consistency.

How do external timing gears differ from internal timing gears?

External gears have teeth on the outer circumference and are mounted outside the assembly for easier access, while internal gears have teeth on the inner surface and are often enclosed, making maintenance more challenging.

What maintenance is required for external timing gears?

Regular lubrication (using grease or oil), inspection for wear or damage, backlash checks, and alignment verification to prevent premature failure and ensure optimal performance.

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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:TIMING_GEARS_EXTERNAL_