The Bernardo Set OZ collet chuck for milling cutters, ER, ISO 40.3 - 25 mm is a lathe chuck for professional use available on Krollit, official Bernardo distributor since 2007.
- ISO 40: 3 - 25 mm
- Taper: Clamping range
Who uses the Set OZ collet chuck for milling cutters, ER, ISO 40.3 - 25 mm and for what
Mechanical workshops and artisan turners use the Set OZ collet chuck for milling cutters, ER, ISO 40.3 - 25 mm as a clamping accessory on metal lathes, ensuring secure clamping and centering of the workpiece during turning, drilling and grooving operations.
Its place in the Bernardo range
The Bernardo Set OZ collet chuck for milling cutters, ER, ISO 40.3 - 25 mm is part of the Bernardo lathe chuck range, 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. 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 Set OZ collet chuck for milling cutters, ER, ISO 40.3 - 25 mm for
The Set OZ collet chuck for milling cutters, ER, ISO 40.3 - 25 mm is recommended for the following professional profiles:
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Mechanical workshops and artisan turners: secure clamping of round or hexagonal workpieces on metal lathes during turning, drilling and grooving operations.
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Users with a compatible flanged Bernardo lathe: original replacement or upgrade for Bernardo range lathes (profi, hobby, etc.) with DIN 55029 compliant A2 mount.
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Irregular or non-round workpieces: for asymmetrically centered workpieces, consider 4-jaw independent chucks or universal platforms.
Frequently Asked Questions
When to use this chuck?
It is a self-centering chuck for clamping workpieces on the lathe during turning operations.
Self-centering chucks allow for quick clamping of the workpiece with a single key. The choice depends on the shape of the workpiece (cylindrical, square) and the body material (steel or cast iron).
What material is the chuck body made of?
The material is indicated in the title: steel (PO series) for maximum precision, cast iron (DK/PS series) for standard use.
The choice depends on usage intensity and required tolerance: steel for production and precision, cast iron for general use.
Which diameter to choose?
The choice of diameter depends on the lathe spindle nose (must match the mounting) and the dimensions of the workpieces to be machined.
Typical diameters: 80-160 mm for hobby lathes, 200-315 mm for professional lathes, 400-630 mm for industrial lathes.
How do I check compatibility with my lathe?
Check the type of mounting on the lathe spindle nose (Camlock D3-D15, or threaded M- mount) and the corresponding diameter.
On modern lathes, Camlock mounting is the most common. Older lathes may have a threaded (M-) or flanged mount. The lathe's technical documentation indicates the exact type.
How is chuck accuracy maintained?
Regular cleaning of the spiral mechanism, periodic lubrication with specific chuck grease, concentricity check every 6 months with a dial indicator.
A jaw that moves with difficulty indicates chips or rust in the mechanism: disassemble, clean, and grease. Concentricity is checked by mounting a ground bar and measuring with a dial indicator: acceptable tolerance 0.03-0.1 mm depending on the model.
