Studio view of the silver Bosch HSPB high-speed steel pilot bit featuring spiral flutes.
Vertical profile of the pilot bit highlighting the sharp twist drill point and metallic finish.
Retail packaging for the pilot bit listing compatible mandrels HSBAL, HSBAMP, and HSBAM, and showing wood, metal, and plastic applications.
Action shot of a worker using a cordless drill and hole saw setup to drill into a tile surface placed on a white bucket.
Studio view of the silver Bosch HSPB high-speed steel pilot bit featuring spiral flutes.
Vertical profile of the pilot bit highlighting the sharp twist drill point and metallic finish.
Retail packaging for the pilot bit listing compatible mandrels HSBAL, HSBAMP, and HSBAM, and showing wood, metal, and plastic applications.
Action shot of a worker using a cordless drill and hole saw setup to drill into a tile surface placed on a white bucket.
BOSCH

Bosch HSPB 3-1/8 Inch High Speed Steel Pilot Bit 1/4 Inch Hex Shank for Bi-Metal and Sheet Metal Hole Saw Mandrels

Only 3 left
SKU: HSPB
$3.29

Description

RELIABLE PRECISION FOR QUICK CHANGE MANDRELS

Restore the performance of your hole saw assembly with the Bosch HSPB 3-1/8 Inch High-Speed Steel Pilot Bit. Engineered for durability and precision, this heavy-duty pilot bit is constructed from high-quality High-Speed Steel (HSS), ensuring it maintains a sharp edge even through rigorous drilling tasks. It serves as the critical guide for your hole saw, preventing walking and ensuring the cutter stays centered for a clean, accurate hole. Designed specifically to snap easily into mandrels, it facilitates quick bit changes without the need for additional tools, keeping your workflow efficient.

This pilot bit features a 1/4-inch hex shank that provides a secure, slip-resistant fit within the mandrel. It is optimized for use with Bosch's Quick Change™ mandrel series (models HSBAM, HSBAMP, and HSBAL) and is fully compatible with both Bi-Metal and Sheet Metal hole saw lines. By replacing a dull or damaged pilot bit rather than the entire mandrel assembly, you significantly extend the life of your tools and reduce replacement costs. Whether you are drilling through wood, metal, or plastic, the HSPB delivers the stability required for professional results.

Key Features

  • High-Speed Steel Construction: Durable HSS material resists heat and wear for extended drilling life.
  • Universal Compatibility: Designed for use with standard Bi-Metal and Sheet Metal hole saws.
  • Quick Change Fit: Easily snaps into compatible mandrels including Bosch HSBAM, HSBAMP, and HSBAL.
  • Secure Shank: 1/4-inch hex shank prevents slippage during high-torque applications.
  • Standard Length: 3-1/8 inch overall length provides the necessary reach for standard hole cutting depths.
  • Cost Effective: Extends the usable life of your mandrel by allowing for simple bit replacement.

What's Included

(1) 3-1/8 Inch High-Speed Steel Pilot Bit

Specifications

Manufacturer Bosch
Model Number HSPB
Bit Diameter 1/4 in.
Overall Length 3-1/8 in. (3.125 in.)
Material High Speed Steel (HSS)
Shank Type Hex
Bit Type Twist
Compatible Mandrels HSBAM, HSBAMP, HSBAL
Surface Coating Uncoated (Bright Finish)
Package Quantity 1

Pro-Tip: The pilot bit is the first point of contact and determines the accuracy of your hole. If you notice your hole saw "walking" or struggling to start a cut, check the pilot bit immediately. Replacing a dulled pilot bit is much cheaper than ruining a workpiece or damaging the larger hole saw teeth.