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Bernardo  |  SKU: 24-1030

Extension socket CM 6 / 3

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

Delivery and Shipping

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Description

Morse taper extension sleeve CM 6/3 — MT 3 tool holder in MT 6 machine tapers. Fully hardened, internal and external taper ground according to DIN 2187. Made in Austria by Bernardo; Krollit has been the official distributor in Italy since 2007.

  • External Taper: MT 6
  • Internal Taper: MT 3
  • Length: 218 mm
  • Standard: DIN 2187
  • Finish: Fully hardened, taper ground

Technical specifications

Specification Value
External taper (machine) MT 6
Internal taper (tool) MT 3
Length 218 mm
D (outer diameter) 63.8 mm
d (inner diameter) 23.825 mm
Standard DIN 2187
Finish Fully hardened, taper ground

Logistics

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

Frequently Asked Questions

What is a CM 6/3 extension sleeve used for and when is it needed?

The CM 6/3 extension sleeve has an MT 6 external taper (fits into the machine) and an MT 3 internal taper (holds the tool). It allows you to mount tools with an MT 3 Morse taper shank on machines with an MT 6 Morse taper seat — the larger number is the machine taper, the smaller is the tool taper. The extension sleeve allows the smaller tool to fit into the larger seat, maintaining DIN 2187 concentricity. Length: 218 mm.

Difference between extension sleeve and reduction sleeve?

An extension sleeve allows a smaller taper (tool) to fit into a larger seat (machine): CM 6/3 → the machine has MT 6, the tool has MT 3. A reduction sleeve does the opposite — it allows a larger taper to fit into a smaller seat. They are not interchangeable. Always check which one you need before purchasing.

How do you remove the sleeve from the Morse taper seat?

Using the ejector rod (drawbar) that runs through the spindle hole: insert the rod from the opposite side and strike with a hammer. Alternatively, use the flat extraction wedge inserted into the spindle slot. Never force it with improvised tools — the Morse taper is self-locking, and lateral force can damage the seat.

Delivery times?

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

Product safety

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