The Bernardo PS3-315/D11 3-jaw cast iron chuck is a lathe chuck for professional use, with a diameter of 315 mm and a weight of 51 kg. Krollit, official Bernardo distributor since 2007.
- Chuck size: 315/D11
- Diameter: 315 mm
- Taper: 11
- B: 125 mm
- D (max.): 196.887 mm
- E: 103 mm
Who uses the PS3-315/D11 3-jaw cast iron chuck and for what
Mechanical workshops and artisan turners use the PS3-315/D11 3-jaw cast iron chuck as a clamping accessory on metal lathes, ensuring secure clamping and centering of the workpiece in turning, drilling, and grooving operations.
Its place in the Bernardo range
The Bernardo PS3-315/D11 3-jaw cast iron chuck is part of Bernardo's range of lathe chucks, 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 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 PS3-315/D11 3-jaw cast iron chuck for?
The PS3-315/D11 3-jaw cast iron chuck 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 in turning, drilling, and grooving operations.
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Users with compatible flange Bernardo lathes: original replacement or upgrade for Bernardo range lathes (Profi, Hobby, etc.) with A2 attachment conforming to DIN 55029.
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Irregular or non-round workpieces: for asymmetrically off-center workpieces, consider 4-jaw independent chucks or universal faceplates.
Technical specifications
| Diameter |
315 mm |
| Taper |
11 |
| B |
125 mm |
| D (max.) |
196.887 mm |
| E |
103 mm |
| F1 |
235 mm |
| Camlock studs |
6 |
| Chuck size |
315/D11 |
| Max. speed |
1500 rpm |
| Approx. weight |
51 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 accuracy of 0.03-0.1 mm depending on the body material (steel = better accuracy, 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 accuracy 0.03-0.1 mm. The DK Camlock series has quick attachment, the PS is the basic model. High service life in standard machining.
Which workpieces is the Ø 315 mm diameter suitable for?
Suitable for medium-large workpieces (max Ø ~360 mm): industrial lathes.
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).
What does the D11 mounting indicate?
The D11 code (Camlock according to DIN 55029) identifies the size of the lathe spindle nose: D3-D5 for small lathes, D6-D8 for medium, D11-D15 for industrial ones.
Check the mounting of your lathe before purchasing: the interface flange must exactly match the code. Camlock = quick clamping with cams, disassembly in 30 seconds without tools.
How to maintain chuck accuracy?
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.
