Cone

How it Works

• Cone grips the face of the work place to open and close the blade (must be a machined surface)

Advantages

• Reliable performance on any machine tool; CNC or manual
• Cost effective alternative to high production tooling

Flywheel

How it Works

• Utilizes the inertia generated during rapid spindle acceleration to open and close the blade

Advantages

• Ideal for modern CNC machines with rapid acceleration and deceleration
• Cost effective alternative to high production tooling

Pad or Ring

How it Works

• Pads grip the inside diameter of the pilot hole to open and close the blade

Advantages

• Ideal for hole sizes greater than 2.25 inches where front (& back) spot facing is required
  
  

Torque Bar

How it Works

• Utilizes an anti-rotation device during spindle reversal to open and close the blade
• A Torque Bar Driver or an Arrester-rod is required

Advantages

• Perfect for high production runs that require the maximum degree of reliability
• Ideal for transfer lines and CNC machines

Air or Coolant

How it Works

• High pressure coolant drives the blade open
• Spring pressure closes the blade when the coolant is shut off

Advantages

• Simple to set up and run
• Perfect for high production runs
• Ideal for machines with high pressure, filtered coolant systems

Special Applications

Bearing Guided

How it Works

• A tapered pilot locates on a process bore supporting the tool a full 360 degrees
• Adjustable insert cartridge
• Available in Torque Bar and Cone activated configurations

Advantages

• Excellent size control and repeatability
• Capable of holding high precision tolerances of .0001" (.0025mm)

Special Applications

Extended Range

How it Works

• A rack and pinion gear opens the blade like a jack knife
• Available in Torque Bar and Coolant activated configurations

Advantages

• Extended spot face to hole-size ratio (largest in the industry)
• Perfect for internal machining in differential gear cases

Special Applications

Hermann Bilz Back Counter Boring Tools

How it Works

• Offset Entry Reverse Boring Bars; RBS
• Offset Entry Reverse Chamfer Bars; RFS 
• Manual 2 piece Counter Boring Systems; TU

Advantages

• Economical tools for less strenuous and smaller lot production applications

  Herman Bilz (PDF - 961 KB)