Our Services

Since 1985, Bay Products has been providing piercing units, expanding mandrels, and special machinery that companies rely on to improve their bottom line. Our piercing units use air, hydraulic, electric and air-oil cylinders for fast, steady performance while maintaining high accuracy. Expandable mandrels and special machinery are custom designed to meet your specific application.

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  • 31xxN-Pierce-OP-70-80-2_Org
  • 380-BMW-F15-F16-Front-Cradle-Paslin-Martinrea_Org
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  • OP90-W-Trapline-Cradle-Pierce-Modatek_Org

Pierce Units

Our pierce untis are designed to perform with precision, accuracy, and reliability within the established cycle time of the assembly process. We specialize in pierce units for precision hole placement such as Pivot, Pinch, 4 Holes Type, Nail Pierce, and Dual Pivot.


Superior Hole Quality

  • Minimum burr

Fast Production Speeds

  • Slug detection prevents accumulation

Easy Maintenance

  • 3D adjustment with hand tools
  • Quick punch & die replacement
  • Centralized lubrication system allows lubrication of multiple units from a single location

Available Configurations

  • Hydraulic
  • Pneumatic
  • Air-Oil

Specialty Tooling

The flexibility of our specialty tooling allows them to be adapted to your specific application. Let us show you how our custom specialty tooling can increase your efficiency and free your manpower.

Specific Applications

  • Inside-Out Tube Piercing
  • Stamping & Forming
  • Resistance & Arc Welding Tooling
  • Clinching
  • Weld Seam Clamping


Expanding Mandrels

Our expandable mandrels provide precise hole-locating technology to ensure proper alignment and prevent costly mistakes.

Maximum Precision

  • Expandable range 0.5" - 10" diameter

Long Life at Consistently High Production Rates

  • Ampco bronze with hardened tool steel or stainless steel construction

Versatile Design

  • Custom sizes and shapes
  • Double action air or manual operation
  • Robotic ID Gripping available
  • Pneumatic, Hydraulic or Manual