УПОРНЫЙ МЕТЧИК Caterpillar 4C4973

The Bottoming Tap forms internal threads inside pre-drilled holes where threading must extend close to the hole bottom. It removes material progressively along the hole surface to create a threaded profile that matches the required fastener. Unlike taper and intermediate taps, it has a reduced lead at the tip, allowing thread formation to continue deeper into the hole with minimal unthreaded space remaining. During operation, the tap advances into the hole while rotating, cutting, and shaping the internal surface into helical threads.Attributes:• Maintains alignment during the thread cutting process.• Works with tapping tools and holding devices.• Produces threads near the bottom of drilled holes.Applications: The Bottoming Tap cuts and extends internal threads to full depth in pre-drilled blind holes to enable maximum fastener engagement where limited clearance restricts standard threading tools.