Dotco 12R0400-18 Inline Precision Grinder | 12-04 Series | 0.1 HP | 60,000 RPM | 1/8" Collet | Composite Housing | Rear Exhaust

Built for fine deburring, small-part finishing, and controlled material removal, the Dotco 12R0400-18 Inline Precision Grinder delivers 0.1 HP with a fast 60,000 RPM free speed for miniature carbide burrs and diamond pins. Its 1/8" collet accepts compatible 1/8" shank accessories, making this pencil-style grinder useful for tight corners, mold details, machined edges, and delicate cleanup work where a larger die grinder would be too aggressive.

Part of the Dotco 12-04 Series, this inline precision grinder uses a compact composite housing for light handling and a rear exhaust configuration that directs air away from the grinding point. The roll throttle provides fingertip speed control, while the supplied overhose and air supply hose help keep the tool manageable during close-up bench work, toolroom finishing, and production deburring tasks.

Type: Inline Precision Grinder | Series: 12-04 Series | SKU: 12R0400-18 | Power: 0.1 HP / 0.074 kW | Free Speed: 60,000 RPM | Collet Size: 1/8" | Exhaust: Rear | Housing: Composite | Throttle Type: Roll | Abrasive Capacity: 1/4" Carbide Burr, 1/4" Diamond Pin | Overall Length: 5.8" / 147 mm | Tool Weight: 0.3 lb / 0.14 kg | Overhose: 1 ft / 0.3 m | Air Inlet: 1/8" NPT

Features:

• Industrial bearing construction supports consistent spindle performance during precision deburring and small-part finishing.
• 60,000 RPM free speed is suited for miniature carbide burrs, diamond pins, and other properly rated precision grinding accessories.
• 1/8" collet accepts compatible 1/8" shank accessories commonly used for fine metal removal and detail work.
• Compact and lightweight composite housing helps reduce hand fatigue during careful bench, mold, and toolroom operations.
• Rear exhaust directs spent air away from the front of the tool to help reduce chip disturbance near the work surface.
• Roll throttle gives the operator fingertip control while maintaining a pencil-style inline grip.
• Standard equipment includes applicable collet, collet wrenches, collet guard, 5 ft / 1.5 m air supply hose, and 1 ft / 0.3 m overhose.

Made in USA:

Applications:

• Mold and die work: Cleaning small cavities, refining machined details, and removing fine burrs from tooling and inserts.
• Precision manufacturing: Deburring small metal components, machined edges, and tight features after milling, drilling, or grinding.
• Aerospace and composite shops: Performing controlled finishing on detailed parts where tool size and accessory control matter.
• Automotive and motorsport fabrication: Touch-up grinding on ports, brackets, custom parts, and small metal assemblies.
• Maintenance and repair benches: Removing burrs, cleaning light defects, and finishing replacement parts, fixtures, and shop-made components.

FAQs:

• Q: What accessory shank size fits the Dotco 12R0400-18?
  A: This model is supplied with a 1/8" collet for compatible 1/8" shank accessories. Always confirm both shank size and maximum accessory speed before mounting a burr, stone, or diamond pin.
• Q: What is a pencil grinder used for?
  A: A pencil grinder is used for fine deburring, engraving-style cleanup, small-detail grinding, and controlled finishing. It is smaller and faster than a standard die grinder, so it is better suited to precision work than broad material removal.
• Q: Why does the 60,000 RPM speed matter?
  A: The high free speed helps small-diameter accessories cut efficiently. Because the tool runs at 60,000 RPM, every accessory used with it must be rated at or above that speed.
• Q: What does rear exhaust mean?
  A: Rear exhaust routes spent air out the back of the tool instead of toward the workpiece. This helps keep airflow away from the grinding point when working on small details or loose chips.
• Q: Should this turbine grinder be lubricated?
  A: No. Use dry air at 90 PSI maximum and do not lubricate turbine grinders, because lubrication can be detrimental to turbine tool operation and service life.

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