Dotco 12R0380-18 Precision Gearless Right Angle Grinder | 12-03 Series | 0.1 HP | 80,000 RPM | 1/8" Collet | Composite Housing | Rear Exhaust

For fine deburring where a straight pencil grinder cannot reach comfortably, the Dotco 12R0380-18 gives technicians a compact gearless right-angle option for small-part cleanup, edge breaking, and detailed finishing. Its 80,000 RPM free speed keeps properly rated carbide burrs and diamond pins cutting efficiently on light contact points, while the 1/8" collet accepts the common fractional shank size used on many precision grinding accessories. The 0.1 HP / 0.074 kW motor is built for controlled fine work rather than high-volume stock removal, making this tool a strong fit for tool rooms, machine shops, mold work, and finishing benches.

The 12-03 Series gearless right-angle configuration helps reduce maintenance and downtime by eliminating the geared angle head found on many small right-angle tools. A lightweight composite housing keeps the grinder easy to maneuver during detailed work, while rear exhaust helps direct air away from the grinding point. Standard equipment includes the applicable collet, collet wrenches, collet guard, 5 ft / 1.5 m air supply hose, and 1 ft / 0.3 m overhose.

Type: Precision Gearless Right Angle Grinder | Series: 12-03 Series | Model: 12R0380-18 | Power: 0.1 HP / 0.074 kW | Free Speed: 80,000 RPM | Collet Size: 1/8" | Abrasive Capacity: 1/4" Carbide Burr, 1/4" Diamond Pin | Housing: Composite | Exhaust: Rear | Overhose: 1 ft / 0.3 m | Length: 5.5" / 140 mm | Weight: 0.3 lb / 0.14 kg | Air Inlet Size: 1/8"

Features:

• Gearless right-angle 12-03 Series design helps reduce maintenance and downtime in precision grinding work.
• Industrial bearing supports consistent spindle operation for fine deburring and controlled metal removal.
• 80,000 RPM free speed is suited for small carbide burrs and diamond pins used on tight details and delicate contact areas.
• 1/8" collet accepts common fractional-shank precision grinding accessories.
• Compact and lightweight composite housing supports detailed hand control during bench work and repeated part cleanup.
• Roll throttle equipped for controlled start-up and speed management during precision finishing.
• Includes applicable collet, collet wrenches, collet guard, 5 ft / 1.5 m air supply hose, and 1 ft / 0.3 m overhose.
• Rear exhaust helps route air away from the accessory and work surface.

Made in USA:

Applications:

• Machine shops and tool rooms — breaking sharp edges, removing small burrs, and correcting minor surface imperfections after machining.
• Mold, die, and fixture work — reaching tight pockets, radii, and small contours with compatible 1/8" shank burrs or diamond pins.
• Metal fabrication benches — light cleanup on brackets, fittings, small weld details, and hard-to-reach corners.
• Aerospace and precision component finishing — controlled deburring on small parts where tool size and accessory control matter.
• Maintenance and repair departments — touch-up grinding on small components, worn edges, and confined repair areas.

FAQs:

• Q: What is the benefit of the 1/8" collet on the Dotco 12R0380-18?
  A: The 1/8" collet fits common fractional-shank burrs, mounted points, and diamond pins used for precision grinding. It is a practical choice when your shop already stocks 1/8" shank accessories.
• Q: How is this different from the 12R0380-13?
  A: The main difference is collet size. The 12R0380-18 uses a 1/8" collet, while the 12R0380-13 uses a 3 mm collet. Choose based on the accessory shank size your operation uses.
• Q: Can this grinder remove heavy material?
  A: This model is intended for precision deburring and light metal removal. Its 0.1 HP motor and 80,000 RPM speed are better matched to fine accessory work than aggressive grinding or large burr use.
• Q: Why does accessory RPM matter on this tool?
  A: Because the tool runs at 80,000 RPM, every mounted accessory must be rated at or above that speed. Using an accessory with a lower maximum speed can create a serious safety hazard.
• Q: Should a quick-disconnect fitting be attached directly to the grinder?
  A: No. Manufacturer product information states not to attach a quick-disconnect fitting directly to the tool. Use the supplied air hose arrangement and proper air-line setup for best performance and tool protection.

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Need help selecting the correct Dotco Grinders for your application? Please call (800) 608-5210 or email info@intlairtool.com