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      Item no.: 138090

      Machine tap uncoated

      Brand: HOLEX
      Taper lead form C
      Thread standard ANSI B 1.20.1
      Thread type NPT
      Application for type of drilling for blind holes and through holes
      Tool material HSS E
      Flank angle 60
      Norm Manufacturer’s standard
      Taper ratio 1:16
      Type of threading tool Machine tap for conventional machining
      Cutting direction right-hand
      No price available

      Machine tap uncoated

      In stock

      Description

      Version:

      Sturdy version, with straight flutes.

      Application:

      Tapered pipe threads (NPT) to ANSI B1.20.1, for threads with sealants. See the table for the specified minimum size of the tapping hole.

      Recommendation:

      Tapping hole ⌀ A:
      Pre-drill a plain hole without using a reamer.
      Tapping hole ⌀ B:

      Pre-drill a plain hole and then ream it using a 1:16 taper reamer (see No. 162650). The taper bore ⌀ can then be checked laterally by reference to the Dmax check dimension (see table). Variant B for drilling the tapping hole offers the best process reliability for the tapping operation.

      Technical Data

      Norm
      Manufacturer’s standard 
      Thread type
      NPT 
      Tool material
      HSS E 
      Taper lead form
      Type of threading tool
      Machine tap for conventional machining 
      Cutting direction
      right-hand 
      Taper ratio
      1:16 
      Application for type of drilling
      for blind holes and through holes 
      Thread standard
      ANSI B 1.20.1 
      Flank angle
      60 degrees
      Coating
      uncoated 
      Colour ring
      without 
      Through-coolant
      no 

      Application Table

      Aluminium (short chipping)
      N
      13
      Steel < 500 N/mm²
      P
      13
      Steel < 750 N/mm²
      P
      10
      GG(G)
      K
      9
      CuZn
      N
      13
      Oil
       
      wet maximum