When fine deburring, blending, or smoothing work calls for a compact high-speed tool, the Cleco MP4200 Inline Pencil Grinder gives operators a slim, straight-body grinder for controlled material removal in tight work areas. The MP Series configuration runs at 70,000 RPM, giving small mounted points, carbide burrs, and precision abrasive accessories the surface speed needed for detail work on edges, castings, molds, and machined parts. It's 1/8" collet supports common pencil-grinder accessories, while the rear exhaust helps direct air away from the work surface so chips and dust are less likely to blow back across the finish area.
This inline pencil grinder is suited to production and MRO environments where access, control, and light finishing accuracy matter more than bulk material removal. Cleco lists the MP Series with a 0.06 HP / 0.044 kW output and a standard hose/overhose setup, making the MP4200 a practical choice for precision bench work, toolroom cleanup, aerospace component finishing, and small-part deburring.
Type: Inline Pencil Grinder | Series: MP Series | Model: MP4200 | Power Output: 0.06 HP / 0.044 kW | Free Speed: 70,000 RPM | Collet Size: 1/8" and 3 mm collets included | Exhaust: Rear | Air Inlet: 1/4" NPT | Recommended Hose I.D.: 1/4" / 6.4 mm | Rated Air Pressure: 90 PSI / 620 kPa | Standard Hose Setup: 5 ft air hose and 1 ft overhose
Features:
- Inline pencil-grinder body helps the operator guide small abrasive accessories with controlled hand placement during fine deburring and finishing.
- 70,000 RPM free speed supports precision material removal with small mounted points, burrs, and other compatible high-speed accessories.
- Rear exhaust directs air away from the work area, helping reduce chip blowback across the part surface.
- Standard 5 ft air hose and 1 ft overhose provide a ready air-supply setup for bench and production stations.
- Slim grip profile helps the tool reach into tight spots where larger die grinders can be difficult to maneuver.
- Includes both 1/8 in and 3 mm collets for use with common inch and metric shank accessories.
- MP Series tools are listed by Cleco for production and MRO applications where precision deburring, blending, and smoothing are required.
Made in USA: 
Applications:
- Aerospace and turbine repair: Cleaning small edges, blending detail areas, and finishing precision components where access and control are critical.
- Mold and die shops: Refining contours, removing small burrs, and smoothing tight cavities with compatible mounted points or carbide burrs.
- Machining and toolroom work: Deburring drilled holes, milled edges, and small machined features after CNC or manual operations.
- Production assembly: Touch-up grinding and small-part finishing at workstations where a compact inline tool improves reach.
- Maintenance and repair: Detail cleanup on brackets, castings, housings, and fixture components without stepping up to a larger die grinder.
FAQs:
- Q: What is a pencil grinder used for?
A: A pencil grinder is used for precision deburring, blending, smoothing, and detail material removal. It is smaller and faster than a standard die grinder, making it better suited to tight spaces and fine finishing work. - Q: What accessory shank size fits the Cleco MP4200?
A: Cleco lists the MP Series as including both 1/8 in and 3 mm collets. Use only accessories with shank sizes that match the installed collet. - Q: Why does the 70,000 RPM speed matter?
A: The high RPM is useful for very small abrasive accessories because small tools need higher rotational speed to cut and finish effectively. Always confirm the accessory’s maximum operating speed before use. - Q: What does rear exhaust mean on this grinder?
A: Rear exhaust routes air out the back of the tool instead of toward the workpiece. This helps keep exhaust air from disturbing chips, dust, or the finish area during detail grinding. - Q: Is this the right tool for heavy stock removal?
A: No. The MP4200 is a precision pencil grinder for fine deburring and smoothing. For heavier grinding, use a larger die grinder or wheel grinder matched to the required accessory size and removal rate.
Looking for more information about Cleco Pencil Grinder? Click here to view the Catalog
Need help selecting the correct Cleco Pencil Grinders for your application? Please call (800) 608-5210 or email info@intlairtool.com
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