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Reduction socket CM 5 / 3
Reduction socket CM 5 / 3 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.
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Reduction socket CM 5 / 3
Description
Morse Taper Reduction Sleeve MT 5/3 — for MT 5 tool holders in MT 3 machine seats. Fully hardened, internal and external taper ground according to DIN 2185. Austrian production by Bernardo. Krollit has been an official distributor in Italy since 2007.
- External taper: MT 5
- Internal taper: MT 3
- Length: 156 mm
- Standard: DIN 2185
- Processing: Fully hardened, taper ground
Logistics
Original spare parts available with 3–5 business days shipping. Customer support available in Italian.
Technical specifications
Technical specifications
| Specification | Value |
|---|---|
| External taper (machine) | MT 5 |
| Internal taper (tool) | MT 3 |
| Length | 156 mm |
| D (outer diameter) | 44.7 mm |
| d (inner diameter) | 23.825 mm |
| Standard | DIN 2185 |
| Processing | 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 CM 5/3 reduction sleeve used for?
The CM 5/3 reduction sleeve has an external MT 5 taper (the tool) and an internal MT 3 taper (the machine's seat). It allows the use of tools with a larger MT 5 shank in machines with a smaller MT 3 seat — the opposite of an extension sleeve. Length: 156 mm, D: 44.7 mm, d: 23.825 mm. Fully hardened and ground according to DIN 2185.
Does the MT 5/3 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 business days shipping. Customer support available in Italian.
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