Special Taps and Dies

Special Taps and Dies "Application specific... embracing the entirety of threadforms, size, geometry and metallurgy"

Your tapping requirement may be unique for various reasons, but one common requirement in all applications is successful tapping. Some examples of why your application may be special...

Special Taps and Dies

  • material characteristic such as
    • swarf type
    • elasticity
    • strength
    • hardness
  • depth of hole
  • thread size
  • pitch
  • thread form
  • reach
  • holding

special taps

4 Factors create Special Taps

There are essentially four qualities in successfully designing and manufacturing a tap...
theoretical knowledge and practical experience are intrinsic in this process.

  • size
  • form
  • geometry
  • texture or finish

special taps

special taps

Base material, its heat treatment, and final surface coating are significant factors; but they would be irrelevant without the correct geometry. Tap geometry involves a combination of features tailored to all the above... thread and flute cutting angles, flute pattern, cutting force reduction features. The culmination of these geometrical features is the knowledge we refer to. Our knowledge combined with processes and equipment, allow consideration of all these variables.

These are manifested as: -

  • straight flute
  • spiral (helical) flute
  • spiral point
  • fluteless cold forming taps

All with various taper lead chamfers. A multitude of geometrical variations of the above styles, may include features such as:

  • interrupted thread
  • chip break features
  • through coolant
  • and many more
fluteless taps

Which contribute to the optimum solution.

Fluteless Taps

Fluteless Taps are ideal for high speed production in malleable material such as aluminium. The problem of swarf is eliminated, which is particularly suitable for deep hole tapping. Long life, and consistency are benefits.

special taps

Comprehensive choice of Special Taps - thread forms

We are all aware of thread forms such as ISO, Unified or NPT for example. Of course these are just three of many standard forms. Understanding their principle and function enables us to advise on thread selection for new products. T-TECH manufactures any combination of flank angle, radius or flat crest and root, parallel or taper. We have listed just some of the better known thread forms.

  • ACME
  • ANPT
  • API
  • BA
  • G
  • ISO
  • KNUCKLE
  • MJ
  • NPS
  • NPSF
  • NPSI
  • NPSM
  • NPT
  • NPT
  • NPTF
  • PG
  • RADIUS
  • RC
  • RP
  • STUB
  • TRAPEZOIDAL
  • UNIFIED
  • UNJ
  • WHITWORTH
  • and the list goes on!

special taps

Information required when specifying a special tap...

Here is a guide to the information required. Firstly the essential, then essential plus, enabling us to design a more suitable tap for your application.

Essential... thread nominal diameter, eg: 10mm
pitch, eg: 1.25mm
threadform if not already defined,
e.g.: Acme - material being cut - through or blind hole

Essential plus... specific material - length of full thread - allowable thread runout (lead) - access restrictions - machine and work holding type - typical batch volume

Technical assistance is always available, whether you chose tel, fax, E-mail, or would prefer a personal visit... See Contact Us.

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  • Phone:
    Telephone: +44 (0)121 430 3399 /
    0121 474 2255
    Fax: +44 (0)121 430 6622 /
    0121 474 2066
  • Email:
    sales@t-tech.co.uk
  • Address:
    70 Prince of Wales Lane
    Birmingham
    B14 4JZ