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Bernardo  |  SKU: 44-1030

HSSE M3 Cobalt Tapping Insert

Business solution up to 30 installments

Delivery and Shipping

At Krollit, we guarantee a safe and reliable shipping process. Orders are handled with the utmost care and traceability until delivery.

For international shipments, please send your request via the dedicated contact form.

Upon delivery, always sign the delivery note with the words “subject to inspection” to allow for proper handling of any irregularities or discrepancies in the product.

Our goal is to ensure you receive prompt service and a worry-free shopping experience.

Description

Cobalt HSSE Tapping Insert M3 — for threading on steel, stainless steel, aluminum, and non-ferrous metals. Made in Austria, in the Krollit catalog since 2007 as an official Bernardo distributor.

  • Tap Diameter: M3 (Ø 3 mm)
  • Metric Thread Pitch: 0.5 mm
  • Material: HSSE (High-Speed Steel with Cobalt)
  • Compatibility: Bernardo TM and STG series tapping machines
  • Standard: DIN 371 / DIN 376

Workable Materials and Limitations

Material Suitable Notes
Mild Steel S235/S275 Yes Standard speed, no issues
Stainless Steel AISI 304/316 Yes Reduce speed by 50%, abundant cutting fluid
Aluminum and Alloys Yes Maximum speed, specific oil for aluminum
Cast Iron Yes Dry cutting or with compressed air
Steels over 1,000 N/mm² No Require specific carbide inserts

Technical Specifications

Specification Value
Thread Size M3
Metric Thread Pitch 0.5 mm
Insert Material HSSE (High-Speed Steel Cobalt)
Standard DIN 371 / DIN 376
Max Material Strength 800 N/mm²

Logistics

Original spare parts available with 3–5 business day shipping. Customer support available in Italian.

Frequently Asked Questions

What is an HSSE insert and how does it differ from standard HSS?

HSSE (High Speed Steel with Cobalt) is high-speed steel with added cobalt (5–8%). Cobalt increases hot hardness and wear resistance: HSSE inserts better withstand the temperatures generated by tapping tough materials like AISI 304 stainless steel, chrome-molybdenum steels, and hard cast irons. On mild steel and aluminum, the difference compared to standard HSS is minimal; on stainless steel and hard materials, the lifespan can be 3–5 times longer.

Is this insert compatible with my Bernardo tapping machine?

Bernardo HSSE inserts are compatible with TM and STG series tapping machines. Verify your machine's spindle connection (GT 12 or GT 24) before purchasing. For compatibility confirmation, contact Krollit. Customer support is available in Italian.

What is the correct speed for tapping with an HSSE insert?

On mild steel S235: 10–15 m/min. On stainless steel AISI 304: 3–6 m/min with abundant cutting fluid. On aluminum: 15–25 m/min. Peripheral speed is calculated: n (rpm) = (v × 1000) / (π × d). Always use cutting fluid — HSSE inserts are heat-resistant but wear faster without lubrication.

Delivery times?

Original spare parts available with 3–5 business day shipping. Customer support is available in Italian.

Product safety

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