The Internal Round tube inner Machine is designed for precision polishing of stainless steel pipes, cylinders, and small-to-medium tanks. With a robust structure, adjustable roller support system, and variable-speed control, this machine ensures smooth, uniform polishing inside cylindrical workpieces with diameters from 350 mm to 1000 mm and a single polishing length up to 3000 mm.

1. Machine Specifications

• Overall Dimensions (L×W×H): 4200 × 1600 × 2000 mm

• Total Weight: 2500 kg

• Main Motor Power: 4 kW

• Polishing Head: Interchangeable flap wheel / cloth wheel

• Applicable Pipe Diameter: Ø350–1000 mm

• Max. Single Polishing Length: 3000 mm

Length and other specifications can be customized upon request.

2. Roller Support System

• Integrated 1-ton adjustable roller table

• Equipped with six Ø150 mm polyurethane rollers

• Driven by a 370 W motor paired with NMRV050 (1:80) reducer

• One side features linked front–middle–rear rollers via two connecting rods for synchronized movement

• Anti-skid / anti-shift device to ensure stable rotation and prevent axial movement

• Adjustable height to accommodate different pipe diameters

3. Motion & Control

• Beam left–right travel controlled by a variable frequency inverter

• Workpiece rotation with VFD speed regulation

• Adjustable polishing head positioning to fit internal curvature

• Variable-speed settings for rough, fine, and mirror polishing processes

4. Key Features

• Delivers uniform internal surface finishing with consistent polishing quality

• Strong mechanical structure suitable for long-duration industrial use

• Fast changeover between flap wheels and cloth wheels

• Stable rotation and feeding ensure high polishing accuracy

• Low maintenance and user-friendly operation

5. Applications

Ideal for industries requiring high-quality internal polishing of cylindrical workpieces, including:

• Stainless steel pipes and cylinders

• Food & beverage processing tubes and vessels

• Pharmaceutical and sanitary tubes

• Chemical process piping