The Bernardo DK12-160 4-jaw chuck is a lathe chuck for professional use, weighing 9 kg. Krollit, official Bernardo distributor since 2007.
- D - Chuck size: 160
- D1: 125 mm
- D2: 140 mm
- D3: 45 mm
- h: 94 mm
- H1: 65 mm
Who uses the DK12-160 4-jaw chuck and for what
Mechanical workshops and artisan turners use the DK12-160 4-jaw chuck 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 DK12-160 4-jaw chuck 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 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 DK12-160 4-jaw chuck for
The DK12-160 4-jaw chuck is recommended for the following professional profiles:
-
Mechanical workshops and artisan turners: secure clamping of round or hexagonal workpieces on metal lathes during turning, drilling, and grooving operations.
-
Users with a compatible flange Bernardo lathe: original replacement or upgrade for Bernardo range lathes (Profi, Hobby, etc.) with A2 DIN 55029 compliant mounting.
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Irregular or non-round shaped workpieces: for non-symmetrically centered workpieces, consider independent 4-jaw chucks or universal faceplates.
Technical specifications
| D1 |
125 mm |
| D2 |
140 mm |
| D3 |
45 mm |
| h |
94 mm |
| H1 |
65 mm |
| h |
5 mm |
| Mounting screws |
6 x M10 |
| D - Chuck size |
160 |
| Max. speed |
2500 rpm |
| Approx. weight |
9 kg |
Frequently asked questions
When to use a 4-jaw chuck?
Self-centering 4-jaw chucks are for square and 4-8 sided workpieces. The jaws move together with a single wrench.
The self-centering 4-jaw chuck (not with independent jaws) clamps square or octagonal workpieces symmetrically. For off-center clamping (eccentric, asymmetric), independent jaw chucks are needed.
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 the required tolerance: steel for production and precision, cast iron for general use.
Which workpieces is the Ø 160 mm diameter suitable for?
Suitable for small-medium workpieces (max Ø ~140 mm): bench lathes and artisan workshops.
The nominal diameter of the chuck indicates the maximum size of the body, not that of the workable workpiece. The clamping capacity depends on the jaw opening (typically 60-70% of the nominal Ø).
How do I check compatibility with my lathe?
Check the spindle nose mounting type of the lathe (Camlock D3-D15, or threaded M-mount) and the corresponding diameter.
On modern lathes, Camlock mounting is the most common. On older lathes, there may be threaded (M-) or flanged mounting. 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.
