1. Magnetic base not holding securely
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Material is too thin to engage magnet.
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Surface of material being drilled must be free of chips, debris, rust and mill scale.
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Size of cutter exceeds machine’s rated capacity.
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Check magnet face for unevenness, nicks and burrs.
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Welding equipment connected to material being drilled.
2. Motor slows when drilling
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If an extension cord is being used, see page 6 for recommended wire gauges and cord lengths.
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Excessive downfeed pressure during drilling cycle will cause motor to slow and overheat.
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Cutting tool needs to be resharpened.
3. Coolant system not working
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Coolant system is gravity dependent, machine must be in an upright position to operate properly.
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Check coolant lines for blockage.
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Dirt or debris in coolant tank.
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Consistency of coolant mixture too thick.
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Incorrect pilot pin being used.
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Vent hole in coolant tank lid blocked.
4. Slugs not ejecting from cutter
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Lack of coolant causing slugs to expand in cutter bore.
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Incorrect pilot pin being used.
5. Breaking cutters
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Coolant must be supplied to interior of cutter.
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Excessive feed pressure being applied when cutter initially contacts work surface.
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Confirm material hardness.
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Drilling stacked materials with incorrect cutter.
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Dull cutters; dull or chipped cutting edges require excessive feed pressure, resulting in breakage.
6. Oversized or rough holes
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Insufficient coolant.
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Excessive feed pressure.
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Dull cutter.
basic troubleshooting
9
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