Izar 3120 & 3160 Taps – Through Hole vs Blind Hole Threading

Izar 3120 & 3160 Taps – Through Hole vs Blind Hole Threading


The Izar 3120 is a straight flute tap, making it the ideal choice for through holes where chips can exit freely through the bottom of the hole.

Straight flute taps are a staple in general engineering and production environments because they are robust, predictable, and versatile.

What the Izar 3120 Is Used For

  • Through-hole tapping

  • CNC machines, pillar drills, and tapping arms

  • General engineering and production work

  • Mild steel, carbon steel, aluminium, and non-ferrous materials

Key Advantages

  • Efficient chip evacuation through the hole

  • Strong, stable cutting action

  • Produces clean, accurate metric threads

  • Excellent choice for high repeatability

  • Great value alternative to higher-priced brands

For workshops running multiple thread sizes or high volumes of through holes, the Izar 3120 offers reliable performance at a sensible price point.

Izar 3160 – Spiral Flute Taps for Blind Holes

The Izar 3160 is a spiral flute tap, specifically designed for blind holes where chips cannot escape downward.

The spiral flutes actively pull chips up and out of the hole, preventing chip packing at the bottom — one of the most common causes of tap breakage.

What the Izar 3160 Is Used For

  • Blind-hole tapping

  • CNC and manual tapping applications

  • Components requiring full thread depth

  • Steel, aluminium, and other machinable materials

Key Advantages

  • Upward chip evacuation – ideal for blind holes

  • Reduced risk of tap breakage

  • Cleaner threads with improved surface finish

  • Better control when tapping to depth

  • Excellent performance without premium pricing

For blind holes, a spiral flute tap like the Izar 3160 isn’t just better — it’s essential.

Straight Flute vs Spiral Flute – Quick Comparison

Feature Izar 3120 Izar 3160
Flute type Straight flute Spiral flute
Best for Through holes Blind holes
Chip direction Down and out Up and out
Risk of chip packing Low Very low
Typical use Production & general work Blind-hole precision

Why Engineers Choose Izar Taps

Izar taps are trusted across Europe for delivering:

  • Consistent quality and accuracy

  • Long tool life when used correctly

  • Strong performance across common engineering materials

  • Excellent value for money for trade and production users

If you want dependable tapping results without paying premium-brand prices, Izar is a smart choice.

Buy Izar 3120 & 3160 Taps Online

Whether you’re cutting through holes or blind holes, choosing the correct tap will improve thread quality, reduce breakages, and save time on the shop floor.

👉 View the full range of Izar 3120 straight flute taps and Izar 3160 spiral flute taps at CuttingTools.online, or contact us for sizing advice and bulk pricing.

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