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Bernardo  |  SKU: 24-1029

Reduction socket CM 5 / 4

€52,73 (22% VAT incl.)
Business solution up to 30 installments

Delivery and Shipping

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Description

Reduction sleeve Morse taper MT 5/4 — tool holder MT 5 in machine seats MT 4. Fully hardened, internal and external taper ground according to DIN 2185. Of Austrian production, available from Krollit official Bernardo distributor since 2007.

  • External taper: MT 5
  • Internal taper: MT 4
  • Length: 171 mm
  • Standard: DIN 2185
  • Finish: Fully hardened, ground taper

Technical specifications

Specification Value
External taper (machine) MT 5
Internal taper (tool) MT 4
Length 171 mm
d (internal diameter) 31.267 mm
Standard DIN 2185
Finish Fully hardened, ground taper

Logistics

Original spare parts available with 3–5 working days shipping. Customer support in Italian available.

Frequently asked questions

What is a CM 5/4 reduction sleeve used for?

The CM 5/4 reduction sleeve has an MT 5 external taper (the tool) and an MT 4 internal taper (the machine seat). It allows the use of tools with a larger MT 5 shank in machines with a smaller MT 4 seat — the opposite of an extension sleeve. Length: 171 mm, D: mm, d: 31.267 mm. Fully hardened and ground according to DIN 2185.

Does the MT 5/4 reduction lose concentricity compared to direct mounting?

A quality sleeve (fully hardened, internal and external taper ground to DIN 2185) introduces 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 days shipping. Customer support in Italian available.

Product safety

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