Bernardo ISO 40 / 40 mm Combined Plug-in Drilling Chuck is a machine tool accessory for professional use available on Krollit, official Bernardo distributor since 2007.
- Holder: Spindle diameter
- ISO 40: 40 mm
Who uses the ISO 40 / 40 mm Combined Plug-in Drilling Chuck and for what
Users who own a compatible machine install the ISO 40 / 40 mm Combined Plug-in Drilling Chuck as an original accessory to extend functionalities or replace worn components.
Its place in the Bernardo range
The Bernardo ISO 40 / 40 mm Combined Plug-in Drilling Chuck 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 assistance with selection.
Krollit logistics and support
Shipping 3-5 business days from Krollit warehouse for spare parts and accessories. Customer service in Italian available for technical documentation and compatibility verification with the reference machine. Krollit has been an official distributor since 2007.
Who is the ISO 40 / 40 mm Combined Plug-in Drilling Chuck for
The ISO 40 / 40 mm combined plug-in drilling chuck 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 an ISO 40 combined plug-in drilling chuck?
It is a quick-change chuck that combines a drill holder and a coupling taper in a single body, mountable directly into the machine's nose.
The "combined plug-in" 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.
On which machine is it mounted?
It mounts directly onto the spindle nose with an ISO 40 taper.
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 tapers for precision bench milling machines.
What is its drilling capacity? 40 mm
Clamping capacity up to Ø 40 mm on the drill shank.
The capacity indicates the maximum diameter of the drill shank that the chuck can accommodate. For larger diameter holes, core drills or specific milling cutters are needed.
Is it key-tightened or keyless?
Combined plug-in chucks are tightened with the supplied spanner wrench, ensuring secure clamping for intensive use.
Keyed tightening is more secure than keyless for operations with high torque or hard materials. The key must be kept near the machine and never left in the chuck when operating.
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 runout exceeds 0.1 mm.
