The Bernardo Keyless Drill Chuck 1 - 13 mm / 1/2" - 20 UNF is a machine tool accessory for professional use, available from Krollit, an official Bernardo distributor since 2007.
- With 1/2“ - 20 UNF internal thread
Who uses the Keyless Drill Chuck 1 - 13 mm / 1/2" - 20 UNF and for what purpose
Users who own the compatible machine install the Keyless Drill Chuck 1 - 13 mm / 1/2" - 20 UNF as an original accessory to extend functionalities or replace worn components.
Its place in the Bernardo range
The Bernardo Keyless Drill Chuck 1 - 13 mm / 1/2" - 20 UNF is part of Bernardo's range of machine tool accessories, 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 working 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 Keyless Drill Chuck 1 - 13 mm / 1/2" - 20 UNF for?
The keyless drill chuck 1 - 13 mm / 1/2" - 20 UNF is recommended for the following professional profiles:
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Users who own the compatible machine: original accessory to extend the functionalities of the indicated machine.
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Workshops with specific setup requirements: component for special machining or increased precision.
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Compatibility with machines of other brands or models: check machine model and specifications before purchase.
Frequently asked questions
What is a keyless drill chuck?
It is a chuck that tightens and loosens by hand, without a key, by rotating the outer sleeve. Bit changes take only a few seconds.
The keyless system is recommended for operations requiring frequent bit changes. The clamping force automatically increases during drilling, ensuring a firm grip even during heavy-duty operations.
What is its capacity? (1-13 mm)
Clamping capacity from 1 to 13 mm.
For drill bits up to Ø 13 mm. For larger diameters, chucks with Morse taper or ER collet holders are needed.
On which drills can it be mounted?
It can be mounted on pillar drills and bench drills with a 1/2"-20 UNF threaded connection (international standard).
The 1/2"-20 UNF connection is the most common on bench and pillar drills. Check the threading of your drill before purchasing.
Can it be used with a pneumatic hammer or batteries?
No, keyless drill chucks are for low-torque use (fixed drills). On percussion tools, the grip loosens.
For impact drills and impact drivers, chucks with a specific self-tightening system (SDS-Plus, SDS-Max or MTPro/Anti-Slip system) are required.
How is it maintained?
Regular cleaning with compressed air, chip removal, application of a light layer of grease to the jaws every 6 months.
If the outer sleeve rotates freely without clamping the inner sleeve, the jaws are oxidized or worn. In this case, replace the chuck. Average useful life: 3-5 years in intensive use.
