Over time, gear teeth are prone to surface cracking because of the constant torque they are submitted to. Surface-breaking cracks are typically found in the addendum, dedendum, and fillet of gear teeth, although they can also occur elsewhere.

 

• Gear module large: 30–42
• Casing is large.

• Topology long, single driver.

• Cable 3 m (9.8 ft).

• Coverage 112 mm (4.4 in).

• Central frequency 500 kHz.

• Frequency range 250 kHz–1 MHz.

• Coils (diameter × number) 4.5 mm × 48 (0.18 in × 48).

• Channels is 91.

• Minimum channel requirement 128.

• Minimum detectable crack length 5 mm (0.197 in).