Machine Tap with interrupted threads ISO 529 Form B HSS-G - M 12 x 1.75

• For general use in workshops and industry
• Optimized for through holes
• Suitable for both manual and machine use
• Materials: steels up to 900 N/mm², unalloyed and low alloyed

Interrupted threads provide multiple advantages:

• Lower cutting forces → less risk of breakage
• Improved chip evacuation → cleaner threads and reduced rework
• Longer tool life → fewer tool changes, higher efficiency

The ISO 529 standard defines machine tap dimensions and tolerances. Form B offers:

• Medium lead with approx. 3.5–5 threads
• Universal application in through holes
• Comparison: Form A = long, Form B = medium, Form C = short, Form D = extra short

1. Preparation: Drill the correct core hole, deburr, and prepare cutting oil.
2. Clamping: Fix the tap securely and align it perpendicular to the hole.
3. Starting: Begin slowly and apply even pressure until the first threads are cut.
4. Cutting: Use cutting oil to reduce wear. Interrupted threads improve chip flow and precision.
5. Finishing: Reverse the tap out carefully, clean the hole, and check with a thread gauge.

Q1: What does ISO 529 mean?
A1: ISO 529 is the standard for hand and machine taps, specifying sizes, tolerances and lead forms.

Q2: What is Form B used for?
A2: Form B has a medium lead, making it ideal for through holes. It is the most common form in workshops.

Q3: How do interrupted threads help?
A3: They reduce cutting forces, improve chip evacuation and extend tool life.

Q4: Can this tap be used by hand?
A4: Yes, it is suitable for both manual and machine use.

Q5: Which materials can I use it on?
A5: It is suitable for machinable materials up to 900 N/mm², especially unalloyed and low alloyed steels.