Bernardo Keyless Drill Chuck 1 - 16 mm / 1/2" - 20 UNF is a professional machine tool accessory available from Krollit, official Bernardo distributor since 2007.
- With 1/2“ - 20 UNF internal thread
Who uses the Keyless Drill Chuck 1 - 16 mm / 1/2" - 20 UNF and for what
Users who own a compatible machine install the Keyless Drill Chuck 1 - 16 mm / 1/2" - 20 UNF as an original accessory to extend functionality or replace worn components.
Its place in the Bernardo range
The Bernardo Keyless Drill Chuck 1 - 16 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 performance: 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 3-5 business days from Krollit warehouse for spare parts and accessories. Italian-speaking customer support 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 - 16 mm / 1/2" - 20 UNF for?
The 1 - 16 mm / 1/2" - 20 UNF keyless drill chuck is recommended for the following professional profiles:
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Users who own a compatible machine: original accessory to extend the functionality of the specified machine.
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Workshops with specific setup needs: component for special processing 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. Changing bits takes only a few seconds.
The keyless system is recommended for operations that require frequent bit changes. The clamping force self-increases during drilling, ensuring a firm grip even for heavy-duty work.
What capacity does it have? (1-16 mm)
Clamping capacity from 1 to 16 mm.
For drill bits up to Ø 16 mm. For larger diameters, chucks with Morse taper or ER collet chucks are needed.
Which drills can it be mounted on?
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 rotary hammer or battery tools?
No, keyless drill chucks are for low-torque use (fixed drills). On percussion tools, the grip loosens.
For rotary hammers 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, removal of swarf, application of a light layer of grease in the jaws every 6 months.
If the outer sleeve spins freely without tightening the inner sleeve, the jaws are oxidized or worn. In this case, replace the chuck. Average lifespan: 3-5 years in intensive use.
