MAG-121A 120° Internal Bore Air Grinder – 52,500 RPM Angle Micro Grinder
MAG-121A 120° Internal Bore Air Grinder – 52,500 RPM Angle Micro Grinder
The MAG-121A is a 120° elbow-style precision air micro grinder engineered for internal bore finishing, cavity grinding, and narrow-space polishing. With a 52,500 RPM motor and 120° angled head, it allows operators to reach internal corners and confined areas with reduced wrist strain — all components machined using Japan STAR (Automatic Lathe) CNC for superior part accuracy.
Key Features
- 120° elbow design reaches internal bores and confined spaces with reduced wrist fatigue
- Quiet operation at 88 dBA (with muffler) — high torque, low noise output
- Interchangeable collet: 3mm / 1/8" / 2.38mm for flexible tooling
- Small-pitch gear design delivers high torque and superior precision
- Stainless steel rotor for extended service life and lower vibration
- Adjustable roller-type throttle valve for fine speed control
Applications
Internal bore finishing · Cavity grinding · Mold polishing · Narrow-space deburring · Precision internal grinding · Die finishing
Technical Specifications
| Specification | Value |
|---|---|
| Model | MAG-121A |
| Free Speed | 52,500 RPM |
| Head Angle | 120° (45°) |
| Collet Size | 3mm / 1/8" / 2.38mm (interchangeable) |
| Body Length | 147 mm |
| Body Diameter | 17 mm |
| Net Weight (tool only) | 123 g |
| Tool + Hose Weight | 0.22 kg |
| Noise Level | 88 dBA (with muffler) / 93 dBA (without) |
| Operating Pressure | 90 PSI (6.32 kgf/cm²) |
| Air Consumption | 7.42 CFM / 0.21 m³/min / 210 L/min |
| Air Inlet | 1/4" |
| Air Hose Length | 1,300 mm (ID: 5 mm) |
| Exhaust Direction | Rear exhaust |
Standard Accessories Included
- Wrench 9×9mm × 2
- Oil bottle × 1
- Mounted grinding wheel 3mm (8×14) × 2
OEM/ODM packaging available. Contact us for wholesale pricing and custom branding options.
For specs, pricing, sample availability, or OEM/ODM inquiries.
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