wall thickness

Garage Door Hollow Shaft Detailed Explanation Reference Standard: Relevant dimensional and material verification standards should be selected only after the shaft material is confirmed. For general tolerance language, buyers may reference ISO 2768 through ISO standards resources. For door-system safety context, installer-side decisions should also respect applicable guidance from DASMA, the Door & Access Systems Manufacturers Association. Short Answer A garage door hollow shaft should not be treated as a generic 1-inch tube. The catalog data confirms two hollow shaft entries: BT-SH601 with 1-inch outside diameter and 2.0 mm, 2.5 mm, or 3.0 mm thickness, and BT-SH603 with 1-inch outside diameter and 1.8 mm thickness. The key buying decision is … 続きを読む