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1. Magnetic base not holding securely
• Material is too thin.
• Surface of material being drilled must be free of chips, debris, rust and mill scale.
• Does size of cutter exceed machine's rated capacity?
• Check magnet face for unevenness, nicks and burrs.
2. Drill motor running, arbor and spindle not turning
• Possible sheared drive train component.
3. Motor slows when drilling
• Is an extension cord being used? If so, see page 5 for recommended wire gages and cord lengths.
• Excessive downfeed pressure during drilling cycle will cause motor to slow and overheat.
• Does cutting tool need to be resharpened?
4. Coolant system not working
• Coolant system is gravity dependent, machine must be in a upright position to operate properly.
• Dirt or debris in coolant tank.
• Consistency of coolant mixture too thick.
• Is correct pilot pin being used?
• Vent hole in coolant tank lid blocked.
5. Slugs not ejecting from cutter
• Lack of coolant causing slugs to expand in cutter bore.
• Is correct pilot pin being used?
• Possible broken internal arbor parts.
6. Breaking cutters
• How is coolant being applied? Coolant must be supplied to interior of cutter.
• Excessive feed pressure being applied when cutter initially contacts work surface.
• Confirm material hardness.
• Drilling stacked materials with incorrect cutter.
• Dull cutters; dull or chipped cutting edges require excessive feed pressure, resulting in breakage.
•
Movement of machine on material - See "1. Magnetic base not holding securely"
•
Inconsistent hardness in material can cause cutter breakage
7. Oversized or rough holes
• Insufficient coolant.
• Excessive feed pressure.
• Dull cutter.
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BASIC TROUBLESHOOTING
www.itmtools.com.au
HMPRO75 OPERATOR'S MANUAL
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