Description
Micro-deburring tight aerospace fuel injector ports, engraving hardened tool steel dies, and finishing delicate investment casting contours defeats bulky rotary tools. The Cleco Dotco Pencil Grinder with 1/8-inch collet delivers 60000 RPM of surgical rotary speed. Precision toolmakers achieve microscopic surface finishes, yet minor airline rust particles score the turbine motor sleeve, causing total RPM loss.
The drive system houses an ultra-precision turbine rotor spinning on matched duplex precision ball bearings inside a slim knurled aluminum casing. The precision-ground 1/8-inch collet holds miniature carbide burrs and diamond points with virtually zero runout. Lacking sliding vanes that wear out from friction, this high-speed pneumatic turbine wet-end delivers glass-smooth rotation at extreme velocities. A flexible rear over-hose assembly routes expanding air discharge and motor sound away from delicate workpieces, keeping the operator station clean.
Field Hardware Performance Matrix
Aerospace finishing departments and medical instrument makers require high-speed pencil grinders that hold zero collet runout tolerances under magnification. The mechanical specifications below demonstrate the precision hardware built into this high-velocity rotary tool.
- 60000 RPM free speed spins miniature carbide burrs and diamond points for surgical metal profiling
- Precision 1/8-inch collet assembly minimizes burr runout to prevent chatter on delicate dies
- Turbine motor wet-end delivers smooth high-speed rotation without sliding vane friction wear
- Matched duplex precision bearings resist radial deflection during delicate engraving passes
- Knurled aluminum pencil body provides tactile finger control during intricate deburring work
- Rear over-hose exhaust assembly routes air discharge and motor noise away from the work bench
- Variable speed twist throttle collar provides smooth rotary acceleration across fine finish passes
Dyno Bench Load Telemetry
Dyno bench testing confirms 60000 RPM free speed that bogs to 48000 RPM under continuous micro-burr profiling. The pneumatic turbine draws 9 CFM at 90 PSI dynamic under full load. Connecting across fifty feet of 1/4-inch polyurethane air line creates an 8 PSI dynamic line pressure drop. Adiabatic expansion cools the rear over-hose to 28°F during extended die finishing. Acoustic sound pressure measures an ultra-quiet 74 dBA.
Field Service Operational Directives
Running this ultra-high-speed turbine grinder without an inline 5-micron air filter will inject abrasive line rust that shatters the precision bearings. Do not force large 1/4-inch shank burrs into this delicate 1/8-inch spindle. Dropping the tool onto concrete shop floors bends the front spindle arbor. Toolroom technicians must enforce these strict maintenance directives.
- Connect this precision turbine tool to a dedicated clean, dry air line with an inline 5-micron air filter
- Never inject heavy petroleum motor oil into this turbine motor, as thick lubricants choke turbine RPM
- Blow out the collet chuck with clean dry air before mounting miniature carbide burrs
Commercial Warranty Package Inventory
Cleco supports this Dotco pencil grinder with a 1-Year limited warranty covering defective components and assembly errors. The protective storage box contains the 60000 RPM pencil grinder, an integrated rear exhaust over-hose, dual collet adjustment wrenches, a 1/8-inch precision collet, and an operational service guide.