ISO Certified CNC Machined Micro Worm Gear Long Shaft for Fan Motors. ISO Certified Quality: Manufactured under ISO9001:2015 and ISO14001 standards for guaranteed precision. High Precision Tolerance: Dimensional accuracy reaches IT6-IT9 with tolerance of +/-0.001mm. Full Customization Options: Offers full, minor, and flexible customization from samples or designs. Diverse Material Selection: Available in Alloy Steel and Non-Standard Ceramic for various applications. Wide Size Range: Diameter ranges from 0.3mm to 17mm, with lengths up to 1000mm. OEM and ODM Services: Professional manufacturer offering both OEM and ODM customization services. 100% Product Inspection: All finished products undergo visual and functional inspection before shipment.