Bernardo Type B Dovetail Jaws is a professional lathe chuck available on Krollit, an official Bernardo distributor since 2007.
- Compatibility: M95 Chuck
- Intended use: Professional and advanced hobbyist
- External profile: Dovetail
- Internal profile: Knurled
Who uses Type B Dovetail Jaws and for what purpose
Mechanical workshops and artisan turners use Type B Dovetail Jaws 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
Bernardo Type B Dovetail Jaws is part of the Bernardo lathe chuck 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 within 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 Type B Dovetail Jaws are for
Type B Dovetail Jaws are 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 Bernardo lathe with a compatible flange: Original replacement or upgrade for Bernardo range lathes (profi, hobby, etc.) with A2 mount conforming to DIN 55029.
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Irregular or non-round workpieces: For unsymmetrically centered workpieces, consider 4-jaw independent chucks or universal faceplates.
Frequently Asked Questions
When should this chuck be used?
It is a self-centering chuck for clamping workpieces on a 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 the intensity of use and required tolerance: steel for production and precision, cast iron for general use.
What diameter should I choose?
The choice of diameter depends on the lathe spindle nose (it must match the fitting) 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 fitting on the lathe spindle nose (Camlock D3-D15, or threaded M- mount) and the corresponding diameter.
On modern lathes, the Camlock fitting 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 precision 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.
