Carbide Tipped Thread Mills
TOSCO Carbide Tipped Thread Mills features a hardened steel body with brazed
carbide tips. The same high quality, micro grain HIP tungsten carbide materials
is used for these tools to insure the same performance found in the TOSCO Solid
Carbide Thread Milling Cutters. Coolant holes into the flutes are provided for
chip evacuation and cooler operating temperatures. Use of this configuration
allows economical fabrication of large sized thread mills as well as special
designs. The overall length can easily be shortened to reduce overhang when
required. Carbide Tipped Thread Mills are stocked uncoated. Coatings available
upon request. As with all TOSCO tools this series of thread mills can be sharpened
or refurbished as required.
Class of thread
A classification system exists for ease of manufacture and interchangeability of fabricated threaded items.
Most (but certainly not all) threaded items are made to a classification standard called the Unified Screw
Thread Standard Series. This system is analogous to the fits used with assembled parts.
Classes 1A, 2A, 3A apply to external threads; Classes 1B, 2B, 3B apply to internal threads.
Class 1 threads are loosely fitting threads intended for ease of assembly or use in a dirty environment.
Class 2 threads are the most common. They are designed to maximize strength considering typical machine shop capability and machine practice.
Class 3 threads are used for closer tolerances.
For more information see: http://en.wikipedia.org/wiki/Unified_Thread_Standard