I. First, Master the Core Principles

The larger and heavier the workpiece—and the harder its material or thicker its scale—the higher the power rating required for the corresponding shot blasting unit.

Selecting insufficient power results in incomplete cleaning; conversely, selecting excessive power leads to wasted electricity, accelerated wear, and increased costs. II. 4 Key Factors Determining Power Requirements

1. Workpiece Material Hardness

Soft Materials: Carbon steel, standard welded parts, thin plates → Small to medium power

Hard Materials: Forgings, cast steel parts, high-strength steel, thick mill scale → High power is mandatory

2. Workpiece Size and Wall Thickness

Thin-walled or Small Parts: Impact force must not be excessive; low power is sufficient

Heavy, Large Structural Parts or Forgings: Require high shot-blasting kinetic energy; high power is necessary

3. Cleaning Grade Requirements

Standard Rust Removal/Surface Cleaning: Conventional power is adequate

Requirements for High Grades (Sa2.5, Sa3) or Surface Strengthening: Must increase power output and/or increase the number of blast wheels

4. Production Output Volume

Low Output / Intermittent Production: Standard power configuration is suitable

High-Volume Continuous Production / Assembly Line Operations: Select a slightly higher power rating to boost efficiency and reduce total operating time

III. Simplified Power Selection Guide for Hook-Type Shot Blasting Machines

Small Workpieces / Light Steel Structures

A single blast wheel of 7.5 kW or 11 kW is sufficient

Standard Castings / Conventional Welded Structures

Equipped with 11 kW or 15 kW blast wheels; total power for a dual-wheel configuration is 15–22 kW

Forgings / Cast Steel Parts / Heavy Engineering Machinery Components

Single blast wheel of 15 kW or 18.5 kW; total power for a dual-wheel configuration is 30–37 kW

Large Wind Power Components / Rail Transit Parts / Thick Plates & High-Strength Components

Select 18.5 kW or higher; utilize a multi-wheel layout to ensure complete, shadow-free cleaning

IV. Consequences of Selecting Excessive or Insufficient Power

Selecting Insufficient Power

Mill scale and rust cannot be thoroughly removed

Requires extending processing time, resulting in wasted electricity and labor costs

Motor operates under prolonged overload, leading to overheating and a high risk of burnout

Selecting Excessive Power

Excessive impact force can easily deform thin-walled workpieces or create deep pitting

Accelerated wear on steel shot, wear-resistant liners, and blast wheel blades

High power consumption during idle/light-load periods, resulting in wasted production costs