Inch Thread Gauge "Acme", Starrett

The Starrett 284 Acme Standard Screw Thread Gauge is a standard for grinding and setting tools when cutting Acme threads, which have the same depth as square threads but the sides of the threads are pitched 14-1/2 degrees (29 degrees included).

This thread form is widely used and has in many cases replaced the square thread in machine construction.

The advantages of Acme thread are its strength and ease of cutting compared to square threads.

Characteristics

• The angles and edges of this gauge are hardened, ground and carefully tested.
  
• In use, the angle of the thread cutting tool is checked on the large, precision-ground V at the end of the gauge.

Specifications

Package specifications