## Common ground
All are types of hammers powered by hydraulic systems or electric motors, used in industrial or construction settings.
## Options at a glance
**8430.39 – Rock & coal cutting hammers**
- **Defining trait:** Designed specifically for use with coal or rock cutters and tunnelling machinery.
- **Typical examples:** Tunnel boring machine attachments, coal mining breakers.
- **Best fit when:** Used in underground mining or tunneling where hard rock or coal is the primary material.
**8430.69 – Mobile machine rock breakers**
- **Defining trait:** Built for mounting on mobile heavy machinery (e.g., excavators) to break large rocks and stones.
- **Typical examples:** Excavator-mounted hammers, quarry rock crushers.
- **Best fit when:** Heavy-duty rock breaking on construction or mining sites with mobile equipment.
**8462.19 – Metal-working hammers**
- **Defining trait:** Designed for shaping, forming, or forging metal materials.
- **Typical examples:** Drop hammers, forging presses.
- **Best fit when:** Industrial metal fabrication, not for breaking rock or concrete.
**8467.29 – Hand-held electric hammers**
- **Defining trait:** Self-contained electric motor; intended for handheld use in light to medium tasks.
- **Typical examples:** Electric chisels, demolition hammers for masonry.
- **Best fit when:** Portable, operator-handheld work like breaking small concrete or brick.
**8479.89 – Skid steer & mini excavator hammers**
- **Defining trait:** Designed for light-duty use with compact machinery like skid steers and mini excavators.
- **Typical examples:** Concrete breakers on compact loaders, asphalt crushers.
- **Best fit when:** Urban construction, trenching, or demolition in tight spaces with small equipment.
## Key differences
| Option | Power Source | Mounting Type | Primary Material | Equipment Size |
|-------|----------------|----------------|--------------------|----------------|
| 8430.39 | Hydraulic | Fixed (on tunneling gear) | Rock/coal | Large, fixed |
| 8430.69 | Hydraulic | Mobile (excavator-mounted) | Rock/stones | Heavy-duty |
| 8462.19 | Mechanical/electric | Stationary | Metal | Industrial press |
| 8467.29 | Electric | Hand-held | Masonry/concrete | Portable |
| 8479.89 | Hydraulic | Compact (skid steer/min excavator) | Concrete/asphalt | Light-duty |
## How to choose
- Is it used in mining or tunneling? → 8430.39
- Is it mounted on a large excavator for heavy rock breaking? → 8430.69
- Is it for shaping metal, not breaking materials? → 8462.19
- Is it handheld with its own electric motor? → 8467.29
- Is it used on a skid steer or mini excavator for light demolition? → 8479.89
## Overlaps & pitfalls
- **8430.69 and 8479.89** both use hydraulic power and break concrete/rock, but differ in equipment size and duty level (heavy vs. light).
- **8467.29 and 8479.89** may both break concrete, but the former is electric and handheld, the latter is hydraulic and machine-mounted.
- If unsure, prioritize the **main application**: rock breaking (8430) vs. demolition (8479) vs. metal work (8462)