PUMA Micro Die Grinder AT-3170
In fossil preparation, micro die grinders are commonly used for reducing hard matrix, matrix smoothing and finishing, shaping stone, cleaning plaster jackets, removing old repairs (e.g. glue lines), carving reconstructions such as epoxy putty and preparing specimens prior to final detailing with air scribes or abrasive units. When fitted with diamond burs, they are particularly effective on hard limestones, sandstones, and other resistant matrices.
Maxmum Working Pressure (for most tasks): 6.2 Bar (90 PSI)
Average Air Consumption: 142l/min or 5 CFM
Noise: 69dB(A)
RPM: 54,000
Connection: 1.5m braided air hose + quick coupler
On/Off Mechanism: Twist Valve
Burs: 3mm collet provided with tool, 1/8" collet available separately
Exhaust: Frontal
Length: 153mm
Net Weight: 0.23kg
What’s in the box? Micro Die Grinder fitted with 3mm Metric Collet, fitted with 1.5m braided hose, with a male coupler (as per user requirements), inline oiler (use if required), lubricant, spanner, User Manual & Declaration of Conformity.
Compatible Sintered Diamond Burs (3mm shank)
Burs must be purchased separately. Sintered diamond burs contain diamond particles throughout the cutting head rather than only on the surface. As the bur wears, new diamond particles are exposed, providing a much longer working life and more consistent performance than standard electroplated diamond burs. The purchase price is offset by the greatly increased lifespan compared with electroplated alternatives.
For fossil preparation, sintered burs are usually preferred because they:
- Last significantly longer.
- Maintain their cutting performance over time.
- Cope better with hard matrices and extended use.
- Can be dressed or cleaned to expose fresh diamond.
