Dotco 12R0500-36 Inline Grinder | 12-05 Series | 0.2 HP | 40,000 RPM | 1/4" Collet | Composite Housing | Front Exhaust

When detailed die and mold work calls for a fast, compact inline grinder, the Dotco 12R0500-36 gives technicians a straight-body tool built for controlled carbide burr and mounted wheel work. This 12-05 Series grinder runs at 40,000 RPM free speed, meaning no-load speed, to support clean cutting action with properly rated small abrasives. Its 0.2 HP motor is suited to precision deburring, parting-line cleanup, flash removal, and detail finishing rather than bulk stock removal. The 1/4" collet, the chuck-style holder that grips the accessory shank, accepts compatible carbide burrs and mounted wheels used in mold shops, aerospace finishing, maintenance benches, and fabrication touch-up work.

The composite housing keeps the tool compact at only 5.9" long and 0.7 lb, helping users maintain fingertip control in tight work areas. A front exhaust configuration routes spent air toward the tool nose, while the dial throttle allows speed control at the operator’s hand for blending, deburring, and edge cleanup where a full-size die grinder would be too large.

Type: Inline Grinder | Series: Dotco 12-05 Series | SKU: 12R0500-36 | Power: 0.2 HP / 0.15 kW | Free Speed: 40,000 RPM | Collet Size: 1/4" | Abrasive Capacity: 1/4" carbide burr, 7/8" mounted wheel | Housing: Composite | Exhaust: Front | Weight: 0.7 lb / 0.32 kg | Length: 5.9" / 150 mm | Air Inlet: 1/8" NPT | Minimum Hose I.D.: 3/16" / 4.8 mm | Rated Air Pressure: 90 PSI / 620 kPa

Features:

• Dial throttle gives the operator direct speed control for detail grinding, feathering, and deburring work.
• Compact inline body provides close control and improved access inside pockets, molds, fixtures, and confined work areas.
• Composite housing keeps the tool light while supporting repeat-use handling in precision material removal tasks.
• 40,000 RPM free speed supports small carbide burrs and mounted wheels when the accessory speed rating matches or exceeds the tool speed.
• 1/4" collet accommodates common industrial burr shanks used for die work, part cleanup, and edge finishing.
• Standard equipment includes applicable collet, collet wrenches, collet guard, and 7 ft / 2.1 m air supply hose.
• Part of the Dotco 12-05 Series grinder family for users who need compact size and high spindle speed in a straight grinder format.

Made in USA:

Applications:

• Die and mold work — cleaning parting lines, touching up cavities, and shaping small features with compatible carbide burrs.
• Deburring and edge cleanup — removing sharp edges from machined parts, castings, stamped components, and fabricated metal pieces.
• Aerospace and composite finishing — controlled material removal on small areas where a compact inline grinder is easier to guide.
• Maintenance and MRO benches — quick cleanup of brackets, fixtures, replacement parts, and repair components before reassembly.
• Fabrication and machine shops — detail grinding, porting, light blending, and small mounted-wheel finishing where a larger die grinder is unnecessary.

FAQs:

• Q: What accessories can be used with the Dotco 12R0500-36?
  A: This grinder uses a 1/4" collet and is listed for 1/4" carbide burrs and 7/8" mounted wheels. Always confirm the accessory shank size, diameter, and maximum RPM before use.
• Q: Is 40,000 RPM appropriate for all burrs and mounted wheels?
  A: No. The abrasive or burr must be rated at or above 40,000 RPM. Using an accessory with a lower speed rating can create a serious safety hazard.
• Q: What does front exhaust mean on this inline grinder?
  A: Front exhaust means the tool discharges spent air toward the front of the grinder rather than through the rear of the handle. This configuration is common on compact grinders, but users should be mindful of chips, dust, and exhaust direction near the work area.
• Q: Is this grinder meant for heavy stock removal?
  A: This 0.2 HP model is best matched to precision grinding, deburring, mold work, and small-area finishing. For aggressive grinding or larger mounted wheels, a higher-horsepower die grinder may be a better fit.
• Q: What air setup should be used with this tool?
  A: The catalog rates the tool at 90 PSI / 620 kPa and lists a 3/16" minimum hose I.D. Use clean, regulated, lubricated air and follow the manufacturer’s air supply recommendations.

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