INSIZE 4812 Series Thread Angle (Fish Tail) Gauge

INSIZE 4812 Series Thread Angle (Fish Tail) Gauge

Fish tail thread angle gauge for checking and setting the angle and pitch of Acme and similar trapezoidal thread forms on the lathe.

Features

• Fish Tail Profile - Distinctive shape sets and checks thread angle directly against the tool or part
• Acme Thread Angle - Ground to the correct angle for Acme (30°) thread forms
• Pitch Markings - Marked with common pitch values for quick reference
• Hardened Steel Construction - Durable material holds its profile accuracy over time
• Lathe Tool Setting - Used to set the lathe tool angle before cutting a thread
• Compact, Pocket-Friendly Size - Fits easily in a pocket or tool roll

How to Use

• Hold Against the Tool or Thread - Position the fish tail profile against the cutting tool or thread form
• Check for a Flush Fit - A flush, gap-free fit confirms the correct angle
• Adjust the Tool as Needed - Re-grind or reset the tool angle if a gap is visible
• Reference the Pitch Markings - Use the marked pitch values to confirm thread pitch

Specifications

Type: Thread Angle Gauge (Fish Tail)
Application: Acme / Trapezoidal Threads
Origin: China