OEM and Aftermarket Rolling Mill Spare Parts | Drawing-Based Manufacturing
Hydraulic Roll Changing Trolley
Heavy-Duty Roll Ring Installation & Removal Solution for Rolling Mills
Product Overview
The Hydraulic Roll Changing Trolley is a professional maintenance tool designed for wire rod mills and bar rolling mills, used for the installation and removal of roll rings during roll change operations.
By using a dual-stage hydraulic pressure system, the trolley enables controlled roll ring positioning, secure taper sleeve tightening, and safe taper sleeve release.
It significantly reduces labor intensity, improves operational safety, and ensures consistent roll change quality in steel mill environments.
This equipment is widely used in rolling mill maintenance workshops where reliability, precision, and safety are critical.
Typical Problems Solved
In rolling mill operations, roll changing often faces the following challenges:
High labor intensity and safety risks during manual roll ring handling
Inconsistent roll ring positioning affecting rolling accuracy
Risk of taper sleeve damage caused by uncontrolled force
Long downtime during roll change operations
The hydraulic roll changing trolley provides a controlled, repeatable, and safe solution, minimizing operator dependency and reducing mill downtime.
Working Principle
The trolley operates with a two-stage hydraulic pressure system:
Low-pressure stage
Used for roll ring positioning and pre-tighteningHigh-pressure stage
Used for taper sleeve tightening during installation or taper sleeve release during removal
Hydraulic pressure is generated by an electric pump station and controlled by a valve group, ensuring correct pressure sequencing and reliable operation.
System Configuration
The hydraulic roll changing trolley consists of four main systems:
Hydraulic pump station – provides stable hydraulic power
Hydraulic valve group – controls pressure levels and action sequence
Mobile trolley unit – supports tools and enables flexible positioning
Electrical control system – push buttons, PLC, and pressure switches for safe control
The system is designed for long-term operation in heavy-duty steel mill conditions.
Main Technical Specifications
High-pressure rating: 700 bar (normal working pressure: 630 bar)
High-pressure flow rate: 0.4 L/min
Low-pressure rating: 80 bar (installation low pressure approx. 160 bar)
Low-pressure flow rate: 2.6 L/min
Motor power: 1.1 kW
Motor speed: 1500 r/min
Hydraulic oil tank capacity: 10 L
Overall dimensions: 1100 × 620 × 880 mm
Key Advantages
Dual-stage pressure control for precise roll ring installation and removal
Improved safety compared with manual roll changing methods
Reduced roll change time, minimizing mill downtime
Stable and repeatable operation, independent of operator skill
Compact and mobile design, suitable for on-site rolling mill use
Typical Applications
Wire rod rolling mills
Bar rolling mills
Steel plant maintenance workshops
Rolling mill overhaul and refurbishment projects
Maintenance & Reliability
Designed for professional hydraulic systems
Simple structure with low failure rate
Easy daily inspection and routine maintenance
Compatible with standard industrial hydraulic oils (ISO VG 32 / 46)
Proper maintenance ensures long service life and stable performance.
Why Choose This Roll Changing Trolley
Designed specifically for rolling mill roll ring operations
Proven hydraulic structure and industrial-grade components
Supports safe and efficient roll change procedures
Suitable for OEM replacement and retrofit projects
This hydraulic roll changing trolley is a practical, long-term solution for rolling mill maintenance teams.
Contact
Reliable parts, delivered fast worldwide.
Phone
+86-185-7510-7789
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