FAQ
Q1. What accuracy can gear milling achieve?
In general, accuracy depends on the gear type, size, fixturing method, and the inspection standard on your drawing, such as ISO or AGMA. In addition, machine condition and process control also affect the result. Therefore, for gears that need higher precision or better NVH performance, grinding or honing is usually used as a finishing step.
Q2. Milling vs hobbing—how to choose?
In practice, the right choice depends on gear design, quantity, and production goals. For example, milling is more flexible for prototypes, rework, or special geometries. By contrast, hobbing is usually more efficient for external spur and helical gears in larger volumes. Meanwhile, internal gears are often better suited to shaping, slotting, or broaching, depending on access, length, and part structure.
Q3. What parameters are required for quotation?
To prepare an accurate quotation, please send your drawing or 3D file, such as STEP, together with key gear data, including module or DP, tooth count, pressure angle, helix angle, and face width. At the same time, please also provide the material, heat-treatment condition, quantity, and target inspection standard or acceptance checks. With this information, we can evaluate the process route and quote more accurately.
Q4. Can you mill after heat treatment?
This depends mainly on the hardness level and the required final accuracy. In many cases, gears are first cut in the soft state and then heat-treated. However, heat treatment may cause distortion, so grinding or honing is often used afterward for final finishing. Therefore, we need to review your drawing and hardness specification first to assess feasibility.
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