Sterling Gun Drills, Inc. North Bennington, VT.
Toll Free: (888) 338-1049 • Phone: (802) 442-3525 • Fax: (802) 442-6225
Company Website: www.SterlingGunDrills.com

General Troubleshooting Guide   Tool Faults Trouble Area If you need further assistance,  call 1-888-338-1049                               Bushing or Pilot: oversize               Workholding: unsuitable         Coolant: insufficient pressure           Coolant: incorrect type Feed: erratic Feed: excessive Feed: insufficient Misalignment Spindle: speed high Spindle: speed low Incorrect nosegrind for material Tool unsupported beyond 30:1 Tool contour incorrect Tool clearance incorrect Material - Heat treatment faults Material - Overheat & or closing in Material - Thin wall section Tool - Heel drag Tool - Needs resharp Tight hole Tool Vibration Workpiece not against bushing

Hole Faults