从机制开始
POM gear selection should start with service conditions and mating geometry, then narrow to a resin grade and process.
POM grades vary in viscosity, additives and reinforcement. The base polymer name alone does not fix wear behavior or dimensional performance.
When comparing POM grades, ask whether the application needs unfilled dimensional stability, lower friction additives, reinforcement or a particular regulatory characteristic. Each change can affect shrinkage and tooth surface behavior. If the mating gear is metal, a rough or damaged flank can overwhelm small differences between POM formulations. Inspect the mate before attributing wear solely to the plastic grade.
报价前需冻结的输入数据
List the gear geometry, mating material, load, speed, temperature, chemical exposure, lubrication and production quantity.
尽可能将这些信息添加到受控图纸、规格说明或询价附件中。避免在非正式的沟通渠道中发布这些信息，有助于供应商比较和后续修改的管理。
什么因素会使这一假设失效？
Selecting a grade only because it worked in another gear can miss a different load, temperature or wear pair.
验证策略
Test the chosen grade in the intended mesh if noise, life or backlash is critical.
For POM Gear Selection Guide, record the exact material grade and conditioning/environment used during validation. Material names alone are too broad for a repeat-production acceptance record.
采购清单
Before requesting a price for pom gear selection guide, identify the current drawing revision, production quantity, material constraint and the feature that most strongly affects function. Ask the supplier to flag any deviation from those inputs in the quotation so technical alternatives stay visible.
针对此决策的实用设计审查
Material selection should connect the polymer to the function and manufacturing route. Review temperature, moisture, chemicals, stiffness, wear pair, dimensional stability and exact grade requirements. A material that performs well in isolation can still be a poor choice when the mating surface or inspection condition is different.
将假设条件记录在图纸或询价单中，以便供应商在报价前进行确认。如果某个数值未知，应将其标识为待定工程项目，而不是直接复制可能与实际装配不符的通用产品目录编号。
验证工作表
- Service temperature
- Moisture / chemical exposure
- Load and stiffness need
- Wear pair / lubrication
- Dimensional-stability priority
- Exact grade or approved substitution limits
使用第一个样品，通过尺寸验证和相关的功能检查来确认这些要点。任何可接受的偏差都应在重复生产前的受控修订中记录下来。
