The Bernardo 3-jaw chuck Ø 630 mm with A2 - 15 mount is a professional lathe chuck, with a diameter of 200 mm and a weight of 19 kg. Krollit, official Bernardo distributor since 2007.
- Chuck size: 200/D5
- D - Diameter: 200 mm
- Taper: 5
- D1 (max.): 82.578 mm
- D2: 104.8 mm
- D3: 60 mm
Who uses the 3-jaw chuck Ø 630 mm with A2 - 15 mount and for what purpose
Mechanical workshops and artisan turners use the 3-jaw chuck Ø 630 mm with A2 - 15 mount as a clamping accessory on the metal lathe, ensuring secure clamping and centering of the workpiece in turning, drilling, and grooving operations.
Its place in the Bernardo range
The Bernardo 3-jaw chuck Ø 630 mm with A2 - 15 mount 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 levels: to choose the right machine for your use case, you can consult the Bernardo catalog on Krollit or contact customer support for assistance in selection.
Krollit logistics and support
Shipping within 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 3-jaw chuck Ø 630 mm with A2 - 15 mount for?
The 3-jaw chuck Ø 630 mm with A2 - 15 mount is recommended for the following professional profiles:
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Mechanical workshops and artisan turners: secure clamping of round or hexagonal workpieces on a metal lathe for turning, drilling, and grooving operations.
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Users with a Bernardo lathe with a compatible flange: original replacement or upgrade for Bernardo range lathes (Profi, Hobby, etc.) with A2 attachment compliant with DIN 55029.
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Irregular or non-round workpieces: for non-symmetrically centered workpieces, consider independent 4-jaw chucks or universal platforms.
Technical specifications
| Chuck size |
200/D5 |
| D - Diameter |
200 mm |
| Taper |
5 |
| D1 (max.) |
82.578 mm |
| D2 |
104.8 mm |
| D3 |
60 mm |
| H1 |
90 mm |
| Max. speed |
2000 rpm |
| Approx. weight |
19 kg |
Frequently asked questions
What type of mount does the 3-jaw chuck Ø 630 mm with A2 - 15 mount have?
Check the indicated attachment in the title or specifications (typically A2-5, A2-6, A2-8 according to DIN 55029 standard).
The A2 flange mount is standard for Bernardo Profi and Hobby range lathes. The number (5, 6, 8) indicates the size of the flange that must match the lathe's headstock.
How many jaws does it have and are they reversible?
Standard self-centering chucks have 3 jaws; typically supplied with 1 set of internal and 1 set of external reversible jaws plus a tightening key.
3-jaw chucks are suitable for round or hexagonal workpieces. For square or irregular workpieces, consider independent 4-jaw chucks. Soft jaws can be machined on a lathe for special applications.
What is the maximum rotational speed?
See "Max. speed" in the technical table: typically 2,500-3,500 rpm for chucks up to Ø 200 mm.
Maximum speed decreases with diameter. Large chucks (Ø 400+ mm) typically have limits of 1,500-2,000 rpm. Exceeding the maximum speed risks the jaws detaching.
What concentricity precision does it offer?
Professional Bernardo chucks comply with DIN 8386 class with typical concentricity of 0.03-0.04 mm.
Concentricity is critical for precision finishes. For high-precision machining (microns), higher-class chucks or dedicated clamping collets are needed.
How is it mounted on the lathe?
The chuck is mounted directly on the headstock flange via a camlock attachment for A2 systems.
The Camlock system allows for quick mounting without an additional adapter flange. For lathes with a threaded attachment, a dedicated adapter flange is required. Krollit supplies compatible flanges separately.
