Concentric hole boring and welding machine
Two-in-One Function: Combines boring and welding in a single machine.
Higher Efficiency: Reduces setup time and speeds up repair work.
Better Precision: Ensures accurate hole alignment and machining.
Lower Labor Cost: One operator can complete multiple processes.
Portable Design: Easy to move and suitable for on-site repair.
Product Introduction
Our concentric hole boring and welding machine is a portable, all-in-one repair tool built for on-site machining and welding of worn pin holes, hinge holes, shaft holes and bearing holes on heavy machinery. It combines precision boring and stable inner-hole welding in one compact unit, so you don’t need to disassemble large equipment or send parts to a workshop.Designed for real job sites, Portable Line Boring Machine cuts repair time by 50% and lowers maintenance costs while delivering consistent, professional results. It works seamlessly with excavators, loaders, cranes, bulldozers, mining machinery and agricultural equipment, making it a must-have tool for repair shops, construction teams and factory maintenance departments.This machine supports one-time positioning for multi-hole processing, ensuring perfect concentricity and alignment. Its sturdy build, simple operation and wide working range make it reliable even in tough outdoor conditions.
Product Parameters
Boring Diameter Range | φ55–φ300 mm |
Welding Diameter Range | φ50–φ300 mm |
Boring Bar Size | φ50 × 1600 mm |
Spindle Speed | 0–260 rpm (stepless adjustment) |
Feed Stroke | 260 mm |
Single-Side Cutting Depth | ≤3 mm |
Machining Roundness | ≤0.02 mm |
Surface Roughness | Ra3.2 |
Power Supply | AC 220V / 380V, 50Hz |
Main Motor Power | 2.5 kW |
Machine Weight | 85 kg |
Product Details
Integrated Welding Module
Supports inner-circle spiral welding, overlay welding and sector welding. The welding torch stays centered automatically for even, void-free beads.
Portable & Sturdy Frame
Compact, lightweight structure for easy transport and setup in narrow spaces. The steel body resists vibration and lasts under heavy use.
User-Friendly Control Panel
Digital display, stepless speed control and one-button operation reduce training time. New users can master basic use in one day.
Quick-Change Components
Fast switching between boring and welding modes saves setup time and improves efficiency.
![Concentric hole boring and welding machine]( "Concentric hole boring and welding machine")
Product Usage Scenarios
Excavator Maintenance：Boom, arm and bucket pin hole repair
Loader & Bulldozer：Hinge hole and shaft seat restoration
Crane & Lifting Equipment：Large bearing hole machining and welding
Mining Machinery：On-site repair of heavy-duty chassis holes
Agricultural Equipment：Tractor and harvester hole maintenance
Construction & Shipbuilding：On-site machining of metal structural holes
Factory & Workshop：In-house repair of large equipment bearing seats
Factory Profile
We are a professional manufacturer of portable machining and repair equipment with 10+ years of experience in R&D, production and sales. Our workshop is equipped with CNC machining centers, precision testing tools and automated assembly lines.Our factory welcomes customer visits and on-site testing. We also provide OEM/ODM services, including custom logos, color schemes and parameter configurations.
Customer Feedback
“This boring and welding machine saved our downtime. We repaired our excavator boom holes on-site in 4 hours instead of sending it to a shop for 3 days. Very easy to operate and accurate.”
— Mr. Wilson, Australia
“We run a repair shop and this machine has become our top tool. Good welding quality, stable boring and almost no breakdowns. Customers are happy with the fast service.”
— Mr. Garcia, Mexico
“The concentricity is perfect. We use it for crane maintenance and it works great in tight spaces. After-sales support is fast and helpful.”
— Mr. Petrov, Russia
“Fast delivery, solid packaging and clear instructions. Our team learned to use it in one day. Great value for money.”
— Mr. Okon, Nigeria
Service Commitment
12-month limited warranty for the whole machine (excluding wearing parts).
24/7 online technical support via call, WhatsApp and email.
Free operation videos, PDF manuals and lifetime technical guidance.
Fast spare parts supply at factory cost.
Full after-sales follow-up to ensure long-term stable use.
