Helicoil STI Tap

STRAIGHT FLUTE TAPS.Widely used for general hand and machine tapping operations. Available in sizes up to 1-1/2".

Plug Style - (4 Thread Chamfer) Used in thru holes and blind holes that allow for ample chip clearance. Easier to start and require less tapping torque than bottoming taps. Bottoming Style - (2 Thread Chamfer). Used in blind holes drilled to a minimum depth that requires threads be close to the bottom of the hole.

SPIRAL POINTED - PLUG & SPIRAL FLUTE. Used for efficient chip disposal in production tapping operations. Available in sizes up to 1/2".

Spiral Pointed - Plug(4 Thread Chamfer) Incorporates an angular grind at the point end of the tap which shears chips and drives them forward of the tap. Used widely in long thru holes and blind holes with ample chip clearance. They are free cutting and provide increased tap strength. Not recommended for abrasive materials.

Helicoil STI tap dimentions - Inch

High Spiral Flute - Bottoming(2 Thread Chamfer) . Have spiral flute for efficiently pulling stringy chips out of deep or blind holes in soft materials. Roughing Taps. Are available for difficult tapping operations where it is desirable to reduce the load on the finishing tap. Available in sizes 7/16-1".

Helicoil STI tap part numbers - metric

Straight Flute taps. Widely used for general hand and machine tapping operations. Available in sizes up to 39mm.

Plug Style - 4 (Thread Chamfer) Used in thru holes and in blind holes that allow for ample chip clearance. Easier to start and require less tapping torque than bottoming taps. Bottoming Style - (2 Thread Chamfer) Used in blind holes drilled to a minimum depth that requires threads be close to the bottom of the hole. Spiral Pointed - Plug & Spiral Flute Used for efficient chip disposal in production tapping operations. Available in sizes up to 12mm. Sprial Pointed - Plug (4 Thread Chamfer) Incorporates an angular grind at the point end of the tap which shears chips and drives them forward of the tap. Used widely in long thru holes and blind holes with ample chip clearance. They are free cutting and provide increased tap strength. Not recommended for abrasive materials.

Helicoil STI Tap dimentions - Metric

Hogh Spiral Flute - Bottoming (2 Thread Chamfer) Have spiral flute for efficiently pulling stringy chips out of deep or blind holes in soft materials.

Roughing Taps . Are available for difficult tapping operations where it is desirable to reduce the load on the finishing tap. Available in sizes 12mm thru 24mm.

Custom STI taps (Inch and Metric Series) Taps made to alternate limits, configurations, or to cut difficult materials, or for very high production are available upon request. The following data should be provided at the time of ordering:

Thread Size Finished hole class of fit. Example : 4H5H, 3B, custom pre plate requirement. Material to be cut, and its hardness. Hole configuration. Example: Thru or Blind including length of drilled and tapped hole. Type tap. Example: Plug or Bottoming Straight Flute, Spiral Point, Spiral Flute. Special Features. Example : Length, Shank Diameter, Chamfer Length, Tap Material. Special coating of tap.

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