The Bernardo combined taper drill chuck CM 4 / 32 mm is a machine tool accessory for professional use available at Krollit, an official Bernardo distributor since 2007.
- Holder: Spindle diameter
- MK 4: 32 mm
Who uses the combined taper drill chuck CM 4 / 32 mm and for what purpose
Users who own a compatible machine install the combined taper drill chuck CM 4 / 32 mm as an original accessory to extend functionalities or replace worn components.
Its place in the Bernardo range
The Bernardo combined taper drill chuck CM 4 / 32 mm is part of the Bernardo machine tool accessories range, distributed in Italy by Krollit since 2007. The Bernardo range includes models of various categories and performances: to choose the right machine for your use case, you can consult the Bernardo catalog on Krollit or contact customer support for selection assistance.
Krollit Logistics and Support
Shipping within 3-5 business days from Krollit warehouse for spare parts and accessories. Customer support in Italian available for technical documentation and compatibility verification with the reference machine. Krollit has been an official distributor since 2007.
Who is the combined taper drill chuck CM 4 / 32 mm for?
The combined taper drill chuck CM 4 / 32 mm is recommended for the following professional profiles:
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Users who own a compatible machine: original accessory to extend the functionalities of the indicated machine.
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Workshops with specific setup requirements: component for particular machining operations or increased precision.
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Compatibility with machines of other brands or models: verify machine model and specifications before purchase.
Frequently Asked Questions
What is a combined taper drill chuck Morse taper 4 (MT 4)?
It is a quick-change chuck that combines a drill holder and a coupling taper in a single body, mountable directly into the machine spindle.
The "combined taper" system eliminates the need for a separate tang, reducing the number of components and the risk of misalignment. Suitable for series production and quick drill bit changes.
Which machine does it mount on?
It mounts directly onto the spindle nose with a Morse taper 4 (MT 4) attachment.
Morse taper 2 (MT 2) is typical for bench drills, MT 3 for professional drills, MT 4 for industrial drills. ISO 30 and ISO 40 are attachments for precision bench milling machines.
What is its drilling capacity? 32 mm
Clamping capacity up to Ø 32 mm on the drill shank.
The capacity indicates the maximum diameter of the drill shank that the chuck can accommodate. For larger diameter holes, specific core drills or milling cutters are needed.
Is it key-tightened or keyless?
Combined taper chucks are tightened with the supplied crown key, ensuring secure clamping for intensive use.
Keyed tightening is more secure than quick-release for operations with high torque or hard materials. The key should be kept near the machine and never left in the chuck during operation.
How is it maintained?
Regular cleaning of the jaws after use, removal of chips and coolant, lubrication with specific chuck oil every 50-100 hours of use.
A jaw that moves with difficulty indicates an accumulation of chips or oxidation. Disassemble the chuck, clean the sliding surfaces, and apply light oil. Replace the chuck if concentricity exceeds 0.1 mm.
