
55-160mm Automatic Multi-Function Portable Line Boring and Welding Machine 220V/380V Sumore Sp50 Manufacturer. Lifetime After-Sales Service: Comprehensive lifetime aftersale service support for all machine issues. Multi-Function Welding: Supports Spiral, Sector, and Jump welding for versatile hole repair. CE & ISO Certified: Meets international standards with CE, ISO 9001, GS, Rohs, and UL certifications. Stepless Speed Control: Features stepless speed mode with rotation speed adjustable from 50-255rpm. Portable & Semi-Automatic: Designed for portability with semi-automatic operation for excavator repairs. Customizable Specifications: Custom options available for rotation speed, boring bar diameter, and length. Dual Voltage Support: Compatible with 220V and 380V power supplies for global use.