Minerallac 86514 Pilot Drill B...
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Minerallac 86514 Pilot Drill Bit, 1/4" x 3-1/16", Manufacturer #TACPD4S

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Model: 86514

In Stock (leaves warehouse same day if ordered before 3pm ET)

$9.51
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Minerallac 86514 Pilot Drill Bit, 1/4\" x 3-1/16\"

The Minerallac 86514 Pilot Drill Bit is a precision-sized 1/4\" x 3-1/16\" pilot drill, manufacturer #TACPD4S, built for electricians and installers who need a reliable, accurately dimensioned pilot bit for starting clean, centered holes ahead of larger knockout punches, hole saws, or conduit-entry tooling. Sized specifically at 1/4\" diameter and 3-1/16\" in overall length, this pilot drill is engineered to guide punch and cutting tools through electrical enclosures, panelboards, and metal boxes with consistent, repeatable accuracy. As part of the Minerallac electrical hardware line, the 86514 pilot drill is a purpose-built tool designed to support fast, professional-grade installation work in commercial and industrial electrical applications.

Key Features

  • Trade Size: 1/4\" diameter x 3-1/16\" overall length for precise, application-matched pilot drilling.
  • Manufacturer Reference: Cross-referenced to manufacturer #TACPD4S for easy identification and reordering.
  • Pilot Function: Designed to establish an accurate centering hole ahead of knockout punches or larger diameter cutting tools, helping ensure clean, properly aligned openings.
  • Consistent Dimensions: Precisely sized to the stated 1/4\" x 3-1/16\" specification, supporting repeatable results across multiple installations.
  • Professional-Grade Design: Built as a dedicated electrical trade tool under the Minerallac brand, intended for use by electrical contractors and installers.

Technical Specifications

  • Trade Size: 1/4\" x 3-1/16\"
  • Manufacturer Number: TACPD4S
  • Brand: Minerallac

Typical Applications

  • Piloting Knockout Punches in Electrical Enclosures
  • Panelboard and Load Center Preparation
  • Conduit Entry Point Setup
  • Commercial and Industrial Electrical Installations
  • General Electrical Contractor Tooling

Why Minerallac?

Minerallac supplies precisely sized, purpose-built tools like the 86514 pilot drill to help electrical professionals achieve accurate, repeatable results on the job. With its specific 1/4\" x 3-1/16\" sizing and clear manufacturer cross-reference to TACPD4S, this pilot drill is designed to integrate seamlessly into standard electrical installation workflows, supporting efficient, professional-quality outcomes on every job.

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Manufacturer Resources

Product Specs

list_batch:
MIN-20260928
Product Type:
Pilot Drill Bit
Series:
TACPD4S
Department:
Electrical
Product Subgroup:
Drill & Driver Bits
Product Size:
3-1/16"
Product Group:
Power Tools & Accessories
Country Of Origin:
United States
Product Material:
Steel
Product Finish:
Hardened Steel

Minerallac 86514 – Frequently Asked Questions

1) What size pilot bit is the Minerallac 86514, and what is it used for?
The Minerallac 86514 is a 1/4 inch diameter pilot drill bit with a 3-1/16 inch overall length, manufacturer number TACPD4S. It drills the centering hole you need ahead of a knockout punch, hole saw, or conduit-entry cutter in enclosures, panelboards, and metal boxes, so the larger tool starts where you laid it out instead of wandering.
2) Will a 1/4 inch pilot drill work with my knockout punch draw stud?
The 86514 drills a 1/4 inch hole, which is the pilot size matched to knockout punch sets that use a 1/4 inch draw stud. If your punch set uses a larger draw stud (3/8 inch and 1/2 inch studs are common on bigger conduit sizes), the 1/4 inch hole will be undersized and you'll need the matching pilot for that stud.
3) Is the Minerallac 86514 pilot bit long enough to get through an enclosure wall or panel gutter?
Overall length is 3-1/16 inches, which clears sheet metal enclosure walls, load center backs, and box sides with room for the chuck to stand off the surface. It is a short pilot bit, not a long-reach or aircraft-length bit, so it won't reach through deep standoffs or stacked assemblies.
4) Should I use a pilot drill or a step bit for conduit openings in a panel?
Different jobs. A pilot bit like the 86514 only sets the 1/4 inch centered starter hole; the actual opening is cut by the knockout punch or hole saw that follows it, which is how you get a clean round conduit entry in heavier enclosure steel. A step bit cuts the finished hole itself and suits thin sheet and smaller openings, but it leaves a slight taper and is harder to control on large diameters. For panelboard and load center conduit entries, pilot plus punch is the standard sequence.
How fast can I get the Minerallac 86514 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Minerallac 86514 come with a warranty?
Absolutely. The Minerallac 86514 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Minerallac 86514?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Minerallac 86514 from ZenSupply?
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