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Bernardo  |  SKU: 21-0936

DTJ-DK12-400 reversible jaws

€404,28 (22% VAT incl.)
Business solution up to 30 installments

Delivery and Shipping

At Krollit, we guarantee a safe and reliable shipping process. Orders are handled with the utmost care and traceability until delivery.

For international shipments, please send your request via the dedicated contact form.

Upon delivery, always sign the delivery note with the words “subject to inspection” to allow for proper handling of any irregularities or discrepancies in the product.

Our goal is to ensure you receive prompt service and a worry-free shopping experience.

Description

Ø 400 mm reversible bolt-on jaws for DIN 6350 12-bolt chucks. Available from Krollit, official Bernardo distributor since 2007.

Technical Specifications

Chuck size

400 mm

L

130 mm

B

45 mm

h

70 mm

h

17 mm

A

19.04 mm

B

12.71 mm

E

38.1 mm

T

6 mm

t1

4 mm

z-d

2-18

Logistics

Original spare parts available with 3–5 business days shipping. Customer support available in Italian.

Frequently Asked Questions

Ø 400 mm reversible bolt-on jaws — what do "bolt-on" and "reversible" mean?

"Bolt-on" indicates that the jaw consists of two parts: the base jaw (hard, hardened steel) which moves in the chuck guides, and the top insert (the actual jaw, made of soft or hardened steel) screwed onto the base jaw. The inserts can be replaced separately when worn, without changing the base jaw. "Reversible" indicates that the same insert can be mounted in two opposite orientations — for internal or external gripping — without changing the jaw.

For Ø 400 mm — what is the clamping diameter range for these jaws?

Reversible bolt-on jaws for Ø 400 mm chucks clamp workpieces within a diameter range that depends on the jaw travel and the mounted configuration. As a general reference, the jaws cover a range of approximately ±30–40% of the nominal chuck diameter. For very small diameters (workpieces <Ø 20 mm on a Ø 400 mm chuck), consider smaller jaws or collet chucks. Customer support available in Italian.

Can the bolt-on inserts be replaced separately?

Yes — this is the main advantage of the bolt-on design. When the top inserts are worn or when you want to mount inserts of a different material (e.g., soft inserts for delicate workpieces), you simply remove the fixing screws and replace only the inserts without having to buy the complete set of jaws. Replacement inserts are available separately. Customer support available in Italian.

Delivery times?

Original spare parts available with 3–5 business days shipping. Customer support available in Italian.

Product safety

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