Bernardo 3-jaw cast iron chuck PS3-200 is a professional lathe chuck, weighing 17.5 kg. Krollit, official Bernardo distributor since 2007.
- Chuck size A: 200
- B: 75 mm
- C: 4 mm
- d: 160 mm
- E: 55 mm
- F: 176 mm
Who uses the 3-jaw cast iron chuck PS3-200 and for what purpose
Machine shops and artisan turners use the 3-jaw cast iron chuck PS3-200 as a clamping accessory on metal lathes, ensuring secure locking and centering of the workpiece during turning, drilling, and grooving operations.
Its place in the Bernardo range
Bernardo 3-jaw cast iron chuck PS3-200 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 with selection.
Krollit logistics and support
Shipping 3-5 business days from Krollit warehouse for spare parts and accessories. Customer assistance 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 cast iron chuck PS3-200 for
The 3-jaw cast iron chuck PS3-200 is recommended for the following professional profiles:
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Machine shops 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 according to DIN 55029.
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Irregular or non-round workpieces: for non-symmetrically centered workpieces, consider 4-jaw independent chucks or universal platforms.
Technical specifications
| B |
75 mm |
| C |
4 mm |
| d |
160 mm |
| E |
55 mm |
| F |
176 mm |
| G |
M10 |
| h |
85 mm |
| J |
29 mm |
| Chuck size A |
200 |
| Max. speed |
2500 rpm |
| Weight approx. |
17.5 kg |
Frequently Asked Questions
When to use a 3-jaw chuck?
Self-centering 3-jaw chucks are for cylindrical, hexagonal, and 3-6-9-12 sided workpieces. The jaws move together with a single key (self-centering).
It is the most common chuck on lathes: quick clamping of symmetrical workpieces, typical concentricity precision 0.03-0.1 mm depending on the body material (steel = better precision, cast iron = standard).
Why a cast iron chuck?
Cast iron chucks (DK Camlock or PS series) offer excellent heat dissipation and robust structure at a lower cost compared to steel.
Cast iron: typical concentricity precision 0.03-0.1 mm. The DK Camlock series has quick-release, the PS is the basic model. High service life in standard operations.
What workpieces is the Ø 200 mm diameter suitable for?
Suitable for medium workpieces (max Ø ~220 mm): professional lathes.
The nominal diameter of the chuck indicates the maximum body size, not the machinable workpiece size. 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 type of mounting of the lathe spindle nose (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 mounts. 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.
