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troubleshooting

Mag Drill Magnet Not Holding: What to Check First

By John Morris · Updated 2026-09-07 · Research methodology

If a mag drill shifts or lifts, stop the motor and keep the machine independently secured. Do not continue drilling while you diagnose the attachment. A magnet problem needs to be resolved before the next hole, even when the previous holes looked normal.

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Describe the failure before changing anything

Write down whether the base would not attach initially, slipped sideways during the cut, or lifted as pressure increased. Note the material, thickness, coating, orientation and cutter size. Those are different situations, and describing them accurately helps the manufacturer distinguish a setup problem from a machine fault.

Photograph the stationary setup only after it is safe. Include the full base footprint, nearby edges and the workpiece support. A close photograph of the switch alone cannot show whether the magnet had an appropriate mounting area.

Compare the actual job with the exact manual

Check the manual for permitted material, minimum thickness and mounting arrangements. The US Evolution S28MAG product page lists a 3/8-inch minimum plate thickness. That specification belongs to that model; it is not a general permission to use any mag drill on any 3/8-inch workpiece.

Hougen's HMD904 specifications illustrate why headline pull force needs context: the listed holding figures change with plate thickness and between standard and swivel bases. A large advertised number is not a field measurement of your setup.

  • Identify the complete model and voltage from the machine label.
  • Record the measured stock thickness rather than estimating it.
  • Check whether the manual permits the surface shape and drilling orientation.

Inspect the exact Amazon offer

Check model, regional version, included accessories and current seller details before ordering.

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When to stop troubleshooting

Visible base damage, recurring loss of attachment or any uncertain safety device calls for manufacturer support. Do not grind the base, bypass a sensor or improvise a mounting adapter because a general internet guide suggests it. Such changes can create additional problems while hiding the original cause.

Ask support a specific question: is this exact drill approved for this material, thickness, surface and orientation? If the answer requires an approved fixture, obtain the fixture instructions before proceeding. If the attachment cannot be confirmed, use a different documented workholding method or machine.

Questions, answered

Does a safety chain fix a weak magnet?

No. It is a secondary restraint, not a substitute for an acceptable mounting setup.

Should I replace the drill immediately?

First establish whether the job meets its documented limits. A new drill with the same limitations may face the same problem.

Sources & further reading

Specification-based guidance; no hands-on performance testing is claimed.

Products to inspect before buying

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DEWALT DWE1622KModel guide available

DEWALT DWE1622K

a corded two-speed option for buyers who need a 2-inch annular capacity without maintaining a battery fleet

Annular diameter
2″ maximum
Cutting depth
2″ maximum

A 2-inch annular cutter rating does not mean this drill accepts a 2-inch twist drill. It also does not turn the two fixed spindle speeds into variable speed. Do not copy specifications from DWE1622K-QS or other regional versions into a US purchase.

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Hougen HMD904Model guide available

Hougen HMD904

a general fabrication model whose part-number differences matter almost as much as its headline capacity

Annular diameter
1.5″ maximum
Cutting depth
2″ maximum

The newer permanent-magnet HMD904 is a distinct configuration, not a feature to assign to every HMD904. Likewise, swivel models have different weights and magnetic force figures. A product card should identify the exact configuration instead of combining the most attractive attributes across the range.

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