Ingersoll Rand Air Pencil Grinder, 60000 RPM

Description

Bulky die grinders ruin intricate mold repairs and precision metal deburring. The Ingersoll Rand Air Pencil Grinder spins ultra-high-speed diamond points and small carbide burrs with pinpoint control. Running on 90 PSI line pressure, this pencil tool delivers an astounding 60,000 free speed RPM. Feeding this high-speed motor unlubricated air ruins the ultra-miniature needle roller bearings in minutes.

A micro-bore ductile iron motor cylinder houses tiny phenolic composite rotor vanes balanced for extreme rotational speed. The case-hardened rotor shaft runs on matched super-precision ball bearings sealed against particulate contamination. An all-metal knurled aluminum outer sleeve acts as both structural body and heat sink. Sintered bronze exhaust mufflers dissipate venting air pressure smoothly without disturbing fine workbench dust. Even minor airline moisture causes immediate rust pitting on the miniature rotor shaft, triggering destructive spindle vibration at speed.

Precision Micro Metalworking Hardware Array

Detail metal finishing requires high rotational speed to prevent tool grabbing on intricate metal patterns. The slim pencil profile allows micro-millwork across tight tool and die cavities.

• 1/8-inch precision steel collet chuck secures micro burr shanks to prevent destructive rotational runout
• Tactile twist-throttle ring provides smooth speed control from zero up to maximum spindle speed
• Slender aluminum grip profile fits between fingers like a drafting pen for steady manual metal carving
• Ultra-flexible 1/4-inch pneumatic whip hose isolates the operator hand from heavy supply line drag
• Phenolic composite rotor vanes sustain extreme velocity without thermal expansion inside the bore
• Integrated rear exhaust hose directs cold motor exhaust and oil mist far behind the immediate work zone
• Precision needle roller bearings maintain spindle alignment under ultra-high rotational velocity loads

High Speed Rotary Telemetry Analysis

Air consumption registers 8.0 CFM at 90 PSI dynamic under full load inside narrow mold cavities. Free speed spins up to 60,000 RPM, dropping to 48,000 RPM under fine carbide cutting contact. Dynamic line pressure drops 8 PSI through the included fine whip hose assembly. Internal air expansion drops exhaust air temperature to 25°F, generating frost on the rear over-hose assembly. Rotational torque output measures 0.4 ft-lbs at peak operating velocity. Operator noise levels remain low at 74 dBA.

Toolroom Maintenance Realities Application Warnings

High-speed micro grinders require pristine, dry, filtered pneumatic lines to avoid catastrophic bearing seizure. Plant operators using dirty main-line shop hoses without an inline micro-lubricator should not buy this tool because minute grit destroys the motor. Forcing large 1/4-inch shank burrs into this collet will fracture the drive spindle.

• Install an inline micro-mist lubricator using ISO VG 32 air tool oil within five feet of the tool
• Blow clean dry air through supply hoses before connecting the micro pencil motor assembly
• Inspect collet bore concentricity before mounting delicate diamond carving points into the tool

Manufacturer Terms Unboxing Package Inventory

Ingersoll Rand backs this micro grinder with a 1-Year limited warranty covering defective parts and manufacturing errors. The complete retail package contains the 60,000 RPM pencil grinder, an integrated rear exhaust whip hose, two collet service wrenches, and the operator instruction booklet.