Practical notes from our engineers on tolerances, materials, finishes and design for manufacturing — plus news from our plants in Dongguan and Zhaoqing.
Tolerances, materials, finishes and design for manufacturing — explained the way we discuss them with buyers every day. Filter by topic or search for a feature.
What Ra 3.2, 1.6 and 0.8 µm look and feel like, which surfaces really need them, and how to call out roughness without over-specifying.
7 min read
Brass is free-machining and ideal for fittings and threaded parts; copper wins on electrical and thermal conductivity. The trade-offs in cost and machinability.
7 min read
Metric and unified threads, thread class, full-thread depth and go/no-go gauge checks: how to specify threads so they fit the first time.
7 min read
How each gear type transmits motion, where it is used and what to put on the drawing — module, number of teeth, pressure angle and accuracy grade.
7 min read
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