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CM 3/3 extension socket
CM 3/3 extension socket 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.
CM 3/3 extension socket
Description
Morse Taper Extension Sleeve MT 3/3 — holds MT 3 tools in MT 3 machine spindles. Fully hardened, internal and external taper ground according to DIN 2187. Austrian made, available from Krollit, official Bernardo distributor since 2007.
- Outer taper: MT 3
- Inner taper: MT 3
- Standard: DIN 2187
- Finish: Fully hardened, taper ground
Logistics
Original spare parts available with 3–5 business day shipping. Customer support available in Italian.
Technical specifications
Technical specifications
| Specification | Value |
|---|---|
| Outer taper (machine) | MT 3 |
| Inner taper (tool) | MT 3 |
| Standard | DIN 2187 |
| Finish | Fully hardened, taper ground |
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 a MT 3/3 extension sleeve used for and when is it necessary?
The MT 3/3 extension sleeve has an outer taper MT 3 (it fits into the machine) and an inner taper MT 3 (it holds the tool). It allows mounting tools with a Morse taper MT 3 shank on machines with a Morse taper MT 3 spindle — 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 spindle, maintaining DIN 2187 concentricity.
Difference between an extension sleeve and a reduction sleeve?
An extension sleeve takes a smaller taper (tool) into a larger spindle (machine): MT 3/3 → the machine has MT 3, the tool has MT 3. A reduction sleeve does the opposite — it takes a larger taper into a smaller spindle. They are not interchangeable. Always check which one you need before purchasing.
How do you remove the sleeve from the Morse taper spindle?
Using an ejector pin (drawbar) that slides through the spindle hole: insert the pin from the opposite side and strike with a hammer. Alternatively, use a 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 spindle.
Delivery times?
Original spare parts available with 3–5 business day shipping. Customer support available in Italian.
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