Ask for a quote! and get the best tailor-made offer for you!

Write to us on WhatsApp: +39 0825-1494022 | Call Center

-10% con il codice: WELCOME

This promotion is not valid on discounted products or on bundled offers.

Bernardo  |  SKU: 21-3344

TJ-PS4-315 reversible insert jaws

€425,92 (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

Reversible top jaws Ø 315 mm for 4-jaw chucks type PS. In the Krollit catalog since 2007 as an official Bernardo distributor.

Technical specifications

Chuck size

315 mm

M

31.75 mm

h

47.6 mm

G

19.04 mm

L

14.5 mm

J

14 mm

K

20 mm

d

12.71 mm

E

4 mm

F

3.2 mm

R

35.4 mm

N

17.5 mm

C

58 mm

B

37 mm

A

108 mm

O

31 mm

P

76.5 mm

Logistics

Original spare parts available with 3-5 working day shipping. Customer support in Italian available.

Frequently Asked Questions

Reversible top jaws Ø 315 mm — what do "top jaws" and "reversible" mean?

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

For Ø 315 mm — what is the clamping diameter range with these jaws?

Reversible top jaws for Ø 315 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 315 mm chuck), consider smaller jaws or collet chucks. Customer support in Italian available.

Can the top inserts be replaced separately?

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

Delivery times?

Original spare parts available with 3-5 working day shipping. Customer support in Italian available.

Product safety

Reviews

Customer Reviews

Be the first to write a review
0%
(0)
0%
(0)
0%
(0)
0%
(0)
0%
(0)