Carbide Spiral Flute Tap for Aluminum M2-M20 Internal Coolant DIN371 Blind Hole Tapping

Short Description:

Made from ultra-fine grain solid carbide (HRA 90–92), this cutting tap is engineered for internal threading in aluminum and other soft non-ferrous metals such as magnesium, zinc and copper.

it is a productivity upgrade over HSS taps for automotive, aerospace, 3C electronics and general manufacturing.

Material: Ultra-fine grain solid carbide
Hardness: HRA 90–92
Flute Type: Spiral flute (blind hole preferred, upward chip evacuation)
Thread Standard: DIN 371 (M2–M10) / DIN 374 (M12–M20); ANSI optional
Tolerance Class: ISO 2H / 6HX

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Bullet Points

Ultra-fine grain carbide at HRA 90–92 resists wear at high cutting speeds, cutting tool-change frequency.

Spiral flute plus mirror-polished grooves evacuate aluminum chips upward — no clogging, wrapping or re-scratching.

Optional internal coolant delivers cooling right to the cutting edge for stable temperature and tool life in continuous runs.

Anti-friction wear-resistant coating (DLC / TiAlN optional) suppresses aluminum adhesion and built-up edge.

ISO 2H / 6HX tolerance class with consistent pitch diameter — stable go/no-go gauging, fewer reworks.

Designed for high-speed aluminum tapping, allowing higher cutting speed and feed to shorten cycle time.

One tool, multiple materials — Al / Mg / Zn / Cu; OEM/ODM customization and mixed-batch shipment supported.

Applications

Automotive: Threading of engine blocks, cylinder heads, transmission housings and aluminum chassis structures

Aerospace: High-precision internal threads in wing spars, fuselage frames and lightweight joints

Electronics: Precision small-diameter threads in aluminum enclosures, heat sinks, mid-frames and structural parts

General Manufacturing: Batch tapping of bicycle frames, home appliances, hardware fittings and aluminum profiles

Automated Lines: High-speed continuous tapping on machining centers, automatic tappers and multi-spindle machines

Hot Q&A

Can it machine steel or stainless steel?

Answer: Not recommended. The flute geometry and edge angles are optimized for aluminum and soft non-ferrous metals; on steel or stainless steel you would see adhesion and chipping. Please use a dedicated steel tap instead.

Blind hole or through hole?

Answer: For blind holes, use the spiral flute (this item) — chips are lifted out and not packed into the hole bottom. For high-volume through holes, a straight flute or spiral point tap gives more direct chip evacuation.

How to prevent chip adhesion and clogging?

Answer: Three things matter most: sufficient coolant concentration and flow (internal coolant recommended); cutting speed and feed matched to aluminum so the tool cuts rather than rubs; and periodic groove cleaning in long runs, checking that the coating is not worn through.

Are coolant holes standard or mandatory?

Answer: Coolant holes are optional. They are strongly recommended for deep holes, continuous high-volume runs and difficult chip evacuation; for shallow holes and low-volume work, external coolant is a lower-cost alternative.