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HSSE M3 Cobalt Tapping Insert
HSSE M3 Cobalt Tapping Insert is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
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.
HSSE M3 Cobalt Tapping Insert
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 |
Logistics
Original spare parts available with 3–5 business day shipping. Customer support available in Italian.
Technical specifications
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 |
Warranty
Warranty terms and support procedures are available on the dedicated Krollit page.
View Krollit warranty termsFAQ / Frequently asked questions
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.
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