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Bernardo  |  SKU: 24-1031

Reduction socket CM 6 / 4

€75,12 (22% VAT incl.)
Business solution up to 30 installments

Delivery and Shipping

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Description

Morse taper reducing sleeve MT 6/4 — holds MT 6 tools in MT 4 machine spindles. Fully hardened, internal and external taper ground according to DIN 2185. Made in Austria by Bernardo; Krollit has been the official distributor in Italy since 2007.

  • External taper: MT 6
  • Internal taper: MT 4
  • Length: 218 mm
  • Standard: DIN 2185
  • Processing: Fully hardened, ground taper

Technical specifications

Specification Value
External taper (machine) MT 6
Internal taper (tool) MT 4
Length 218 mm
D (outer diameter) 63.8 mm
d (inner diameter) 31.267 mm
Standard DIN 2185
Processing Fully hardened, ground taper

Logistics

Original spare parts available with 3–5 working day shipping. Customer service available in Italian.

Frequently asked questions

What is a MT 6/4 reducing sleeve for?

The MT 6/4 reducing sleeve has an MT 6 external taper (the tool) and an MT 4 internal taper (the machine spindle). It allows the use of larger MT 6 shank tools in machines with smaller MT 4 spindles — the opposite of an extension sleeve. Length: 218 mm, D: 63.8 mm, d: 31.267 mm. Fully hardened and ground according to DIN 2185.

Does the MT 6/4 reduction lose concentricity compared to direct mounting?

A quality sleeve (fully hardened, internal and external taper ground DIN 2185) introduces a negligible concentricity error — typically <0.01 mm — sufficient for 95% of standard drilling and turning operations. For high-precision grinding and boring, where concentricity <0.005 mm is critical, prefer tools with the machine's native taper.

Delivery times?

Original spare parts available with 3–5 working day shipping. Customer service available in Italian.

Product safety

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