Panel Drill Bit Sets

Panel Drill Bit Sets

Panel drill bit sets are curated kits for drilling clean holes through sheet metal, automotive panels, electrical enclosures, and similar thin-material applications where standard jobber drills tend to grab, tear, or oversize the hole. The right set covers the common hole sizes for panel work in a single case — step drills for variable-size hole cutting, fluted HSS panel drills for clean entry, and centre-finding bits for layout work. AIMS Industrial stocks panel drill bit sets for trade and industrial use.

What's typically in a panel drill bit set

• Step drills (Unibit-style) — single drill cuts a range of hole sizes by stepping through diameters; ideal for variable-size hole work
• HSS panel drills — short-flute geometry that drills cleanly without grabbing thin material
• Centre punches and centre-finding tools — for accurate layout before drilling
• Reamers — for cleaning and slightly enlarging holes after drilling
• Burr removal tools — for deburring drilled holes in thin material

Where panel drills earn their place

• Automotive panel work — body repairs, accessory mounting, and dash modifications where panel thickness is 0.8-2mm
• Electrical enclosures — drilling for cable glands, switch holes, and instrument cutouts
• Sheet metal fabrication — clean entry holes for fasteners and access
• HVAC ductwork — drilling holes for fastener attachment and thermometer mounts
• Service van and toolbox modification — installing accessories and storage

Step drills explained

A step drill is a single drill bit with progressively larger steps along its length — drill in until you reach the step that matches your target hole size, stop, and you have a clean hole at that diameter. They cut cleanly in thin material because each step makes contact gradually rather than the full diameter chiselling at once. Common step drills cover 3mm-13mm or 4mm-22mm in step increments, with imperial versions also available. They don't suit thick material — the steps need to clear the material thickness for the drill to advance.

Why standard drills struggle

A standard jobber drill has a long flute and aggressive cutting geometry that grabs at the breakthrough point in thin material — the bit suddenly bites and pulls through, oversizing the hole, distorting the panel, or breaking the bit. Panel drills have shorter flutes, gentler cutting geometry, and (in step drill form) progressive engagement that prevents the grab.

Brands stocked at AIMS

Sutton Tools and Bordo cover the panel drill bit set range, with Champion stocked for selected sizes. The sets typically include sizes covering the daily-used range for trade work; specialty sizes can be sourced as singles.

Drilling practice

Use cutting fluid (Tap Magic or Molycut), drill at moderate RPM (high speed in thin material causes work-hardening and bit dulling), apply steady pressure rather than peck-drilling, and support the workpiece on a backing material to prevent breakthrough damage. Centre-punch the location first; sheet metal drilled without a centre mark tends to walk.

Need help speccing a panel drill set for your trade? contact our team — we'll match by hole size range and material type.