Dotco 12L1180-36 Inline Extended Grinder | 12-11 Series | 0.3 HP | 28,000 RPM | 1/4" Collet | Composite Housing | Rear Exhaust

Built for deburring, die and mold work, and detail finishing inside recessed areas, the Dotco 12L1180-36 Inline Extended Grinder combines a compact inline body with a 3" extension for better reach into pockets, ports, castings, fixtures, and other areas where a standard-length die grinder may come up short. Its 0.3 HP / 0.22 kW pneumatic motor and 28,000 RPM free speed (no-load speed) support controlled material removal with properly rated carbide burrs, mounted points, and mounted wheels.

The 1/4" 300 Series collet (the clamping sleeve that grips the accessory shank) accepts common die-grinding accessories up to the listed 1/2" carbide burr and 1" mounted wheel capacity. A rear exhaust configuration routes spent air back toward the hose instead of forward toward the workpiece, while the composite housing keeps the tool at just 1.1 lb / 0.50 kg for frequent repositioning during precision grinding and finishing tasks.

Type: Inline Extended Die Grinder | Series: 12-11 Series | Model: 12L1180-36 | Power: 0.3 HP / 0.22 kW | Free Speed: 28,000 RPM | Collet Size: 1/4" | Collet Type: 300 Series | Extension: 3" | Abrasive Capacity: 1/2" Carbide Burr, 1" Mounted Wheel | Housing Material: Composite | Exhaust: Rear | Throttle Type: Locking Lever | Weight: 1.1 lb / 0.50 kg | Overall Length: 8.9" / 226 mm | Air Inlet Size: 1/4" | Minimum Hose I.D.: 1/4" / 4.8 mm | Rated Air Pressure: 90 PSI / 620 kPa

Features:

• 3" extended housing improves reach into recessed work areas, internal passages, mold details, casting pockets, and fixture-obstructed surfaces.
• 0.3 HP / 0.22 kW pneumatic motor provides controlled power for precision deburring, blending, finishing, and light material removal.
• 28,000 RPM free speed helps maintain efficient cutting action when paired with abrasive accessories rated at or above tool speed.
• 300 Series 1/4" collet accepts common carbide burrs, mounted points, and mounted wheels within the manufacturer-listed capacity.
• Rear exhaust configuration helps direct air away from the cutting area and supports optional OH Overhose conversion kits for additional exhaust routing and noise suppression.
• Composite housing helps reduce tool weight during repeated positioning and detail grinding work.
• Multiple industrial bearings support low vibration and balanced operation, especially important on extended-reach grinder configurations.
• Standard equipment includes the applicable collet and collet wrenches.

Made in USA:

Applications:

• Die and mold shops — reaching into cavities, gates, parting lines, and recessed contours for controlled deburring and finishing.
• Machine shops and metalworking cells — removing burrs from drilled holes, machined edges, slots, and internal features using compatible carbide burrs.
• Fabrication and weld prep — blending small welds, cleaning tight joints, and preparing edges where a compact extended grinder offers better access.
• Industrial MRO and plant maintenance — detail grinding on brackets, housings, guards, fixtures, and repair parts during equipment service.
• Automotive, fleet, and experienced garage use — port cleanup, bracket modification, casting touch-up, and general pneumatic die-grinder tasks where the air supply and accessory speed ratings are matched to the tool.

FAQs:

• Q: What accessories can be used with the Dotco 12L1180-36?
  A: This grinder is intended for carbide burrs, mounted points, and mounted wheels that fit the 1/4" collet. The listed abrasive capacity is 1/2" carbide burr or 1" mounted wheel, and the accessory speed rating must equal or exceed 28,000 RPM.
• Q: What is the difference between the 12L1180-36 and 12L1100-36?
  A: The 12L1180-36 is the rear exhaust version, while the 12L1100-36 is the front exhaust version. Both are 12-11 Series, 28,000 RPM, 3" extended grinders with a 1/4" 300 Series collet.
• Q: Why choose the 3" extended version instead of a standard inline die grinder?
  A: The 3" extension gives the operator more reach into recessed pockets, castings, fixtures, and internal features. It is useful when the grinding point needs to reach deeper without moving to a larger or less controllable tool.
• Q: What air setup does this grinder require?
  A: The manufacturer rates the tool at 90 PSI / 620 kPa and lists a minimum hose I.D. of 1/4" / 4.8 mm. Air consumption was not provided in the available source data, so compressor sizing should be confirmed before publishing a CFM recommendation.
• Q: Does the grinder include burrs or mounted wheels?
  A: The listed standard equipment includes the applicable collet and collet wrenches. Carbide burrs, mounted points, and mounted wheels should be selected separately based on the material, shank size, diameter, and RPM rating required for the job.

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