Carbide Drill Troubleshooting

Start with the problem you can see. Excessive heat, chipped edges, an off-center start, and packed flutes need different checks. Choose the guide below that matches what is happening in your operation.

These guides cover metal drilling, with a focus on solid carbide tools. They explain what to inspect, which conditions to adjust, and when to assess the drill for replacement or reconditioning.

Where to Start Troubleshooting

• Use the symptom to decide what to inspect first.
• Check both the drill and the process, since several problems can produce similar damage.
• Assess worn or damaged tools before using them again.
• If trouble keeps returning, use the failure pattern to guide the choice of another drill design.

Find Your Drilling Problem

Each guide explains likely causes and corrective actions, including when a different drill specification may help.

Drill Overheating

If you notice abnormal heat, a burning smell, or rapid wear, identify whether the problem is in the power tool or the cutting zone. The overheating guide covers equipment checks, cutting conditions, coolant delivery, trapped chips, and worn edges. It also explains when to have the bit assessed for replacement or resharpening.

Drill Bit Chipping

Small fractures at the drill point or outer corners can affect hole quality and cutting stability. Where and when the edge chips can help you decide whether to check runout, toolholding, workholding, entry and exit conditions, coolant, or chip removal. Learn how to assess the damage and when to review the drill specification.

Drill Walking

When the bit slides away from the intended hole location, check how it first contacts the workpiece. The walking guide covers workholding, runout, tool length, starting methods, and spot-drill angles, including entry on inclined or curved surfaces. Use it to review entry preparation, edge condition, and drill geometry.

Drill Flute Clogging

Look at where the chips collect: inside the flutes, around the exposed drill, or on the cutting edge. The clogging guide explains what these differences can reveal about chip formation, coolant delivery, hole depth, and wear. It also covers when peck drilling or a different flute and coolant design may help.

What to Check Before Changing the Drill

Record when the problem starts: at entry, deeper in the hole, at breakthrough, or after a run of acceptable holes. Include this information when discussing the problem with your tool supplier.

• Inspect the cutting edges for wear, chipping, and stuck-on material.
• Check toolholding, workholding, alignment, runout, and tool overhang.
• Compare speed and feed with the recommendations for the specific drill and workpiece material.
• Check whether coolant reaches the cutting zone and inspect the chips.
• Confirm that the material, hole depth, and entry conditions fall within the drill's application range.

Use the manufacturer's application data to guide adjustments. Reducing speed or feed, or adding pecks, may not address the cause. If the drill binds or shows damage, stop and follow the equipment's inspection procedures before continuing.

When to Replace the Tool or Change the Drill Design

Assess the tool's condition first. A worn drill may need replacement with the same specification; recurring trouble with a serviceable drill may call for a different design.

Condition	Next Step
Worn or chipped cutting edges	Remove the tool for assessment. Confirm whether it needs replacement or reconditioning to the manufacturer's specifications.
Serviceable tool with a setup or cutting-condition problem	Correct the identified problem and verify hole quality before changing the drill specification.
Recurring trouble despite suitable operating conditions	Review the drill's geometry, material suitability, usable depth, and coolant requirements with the supplier.

When testing another design, evaluate it against the problem you need to solve. For chip packing, for example, review chip-control geometry, depth capability, and coolant delivery. Run the trial at the candidate drill's recommended settings and record hole quality, tool condition, cycle time, and interruptions.

Compare Drills for Your Application

To help suppliers suggest suitable options, provide the workpiece grade, hole requirements, and failure pattern, along with details of the machine, holder, coolant supply, and cutting settings. Confirm the specific drill's operating requirements before scheduling a trial.

Drilling stainless steel? Browse our carbide drills for stainless steel guide for options grouped by hole type.