Dotco 12L1181-36 Inline Extended Grinder | 12-11 Series | 0.3 HP | 28,000 RPM | 1/4" Collet | Composite Housing | Rear Exhaust

When front-exhaust airflow is not the right fit for the job, the Dotco 12L1181-36 Inline Extended Grinder gives users the same extended-reach 12-11 Series platform with a rear exhaust configuration. Its 5" extension helps reach into ports, recessed weld areas, casting pockets, molds, and fixture details, while the 0.3 HP / 0.22 kW pneumatic motor and 28,000 RPM free speed support fast deburring and finish grinding with properly rated accessories.

This extended die grinder uses a 1/4" 300 Series collet for common industrial carbide burrs, mounted points, and mounted wheels. The inline body provides straight access to the workpiece, while the composite housing keeps the tool light for repeated positioning during detail grinding. Multiple bearings help maintain low vibration and balance, and rear exhaust routing can help direct air away from the immediate work area when the application calls for it.

Type: Inline Extended Die Grinder | Series: 12-11 Series | Model: 12L1181-36 | Power: 0.3 HP / 0.22 kW | Free Speed: 28,000 RPM | Collet Size: 1/4" | Collet Type: 300 Series | Extension: 5" / 127 mm | Abrasive Capacity: 1/2" Carbide Burr, 1" Mounted Wheel | Housing Material: Composite | Exhaust: Rear | Weight: 1.3 lbs / 0.59 kg | Overall Length: 10.9" / 277 mm | Air Inlet: 1/4" NPT | Minimum Hose I.D.: 1/4" | Rated Air Pressure: 90 PSI / 620 kPa

Features:

• 5" extended housing improves access into deep pockets, internal contours, molds, ports, and recessed work areas.
• Rear exhaust configuration helps route exhaust air away from the front of the tool and supports optional overhose use where applicable.
• 28,000 RPM free speed supports efficient deburring, blending, and fine material removal when used with accessories rated for the tool speed.
• 0.3 HP / 0.22 kW motor provides useful output for detailed die-grinding work without moving to a larger grinder platform.
• 1/4" 300 Series collet accepts common carbide burrs, mounted points, and mounted wheels within the manufacturer’s rated abrasive capacity.
• Composite housing keeps the grinder lightweight for repeated positioning and controlled inline handling.
• Multiple industrial bearings help support low vibration and balanced operation on the extended spindle layout.
• Standard equipment includes applicable collet and collet wrenches.

Made in USA:

Applications:

• Metal fabrication and welding — reaching recessed welds, removing burrs, and blending small surfaces after cutting, fitting, or repair work.
• Toolroom and mold maintenance — cleaning pockets, cavities, contours, and fixture details where standard-length grinders may not reach comfortably.
• Foundry and casting cleanup — removing flash, parting-line marks, and small defects on cast components using properly rated burrs or mounted points.
• Transportation equipment manufacturing — deburring brackets, frames, housings, and tight mechanical areas during assembly or rework.
• Automotive and garage work — port cleanup, small-area shaping, gasket-surface preparation, and general repair deburring with compatible accessories.

FAQs:

• Q: What is the difference between the 12L1181-36 and the 12L1101-36?
  A: Both are 0.3 HP, 28,000 RPM extended inline grinders with 1/4" collets. The key difference is exhaust direction: the 12L1181-36 is rear exhaust, while the 12L1101-36 is front exhaust.
• Q: Why choose a rear exhaust grinder?
  A: Rear exhaust routes spent air toward the back of the tool rather than out the front. This can be helpful when users want less exhaust disturbance near the workpiece or when an optional overhose setup is preferred.
• Q: What accessories fit this Dotco grinder?
  A: The 12L1181-36 uses a 1/4" 300 Series collet and is rated for a 1/2" carbide burr or 1" mounted wheel. Always confirm the accessory shank size and maximum RPM before use.
• Q: What does the 5" extension help with?
  A: The extension gives the operator more reach into recesses, ports, casting cavities, and tight fixture areas where a standard inline grinder may be too short.
• Q: What air supply should be used?
  A: Tool performance is rated at 90 PSI / 620 kPa, and the manufacturer lists a 1/4" minimum hose I.D. Use clean, regulated, lubricated air to help the tool perform consistently.

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