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Bernardo  |  SKU: 21-3260

STJ-PS4-125 soft insert brake shoes

€118,22 (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

Soft top jaws Ø 125 mm for 4-jaw chucks type PS. Krollit has been the official Bernardo distributor in Italy since 2007.

Technical Specifications

Chuck size

125 mm

A

64 mm

B

22 mm

C

38.5 mm

d

7.95 mm

E

15 mm

F

32 mm

G

12.69 mm

h

25 mm

l

3.2 mm

J

4 mm

Bolt size

M8

Logistics

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

Frequently Asked Questions

Soft top jaws Ø 125 mm — how do they differ from soft monobloc jaws?

Soft top jaws combine the top jaw construction (hardened base body + replaceable soft top insert) with the unhardened mild steel insert. Compared to soft monobloc jaws: soft inserts are replaced separately when worn or when machined too much, without changing the base body. Compared to reversible hardened top jaws: soft inserts allow in-situ turning for maximum concentricity on delicate workpieces.

For Ø 125 mm — when is it necessary to bore (machine) soft inserts in situ?

In-situ boring of soft inserts is necessary whenever: new inserts are mounted, the clamping pressure of the chuck is changed, or eccentricity is noted in the workpiece. For machining parts that require concentricity better than 0.05 mm, in-situ boring is indispensable — it reduces runout to the physically achievable minimum with the chuck in use.

Can soft inserts be reversed for internal/external gripping?

It depends on the model: DSTJ jaws have non-reversible soft inserts (internal gripping only or external gripping only); reversible STJ top jaws can have soft inserts mounted in both orientations. Check the specifications for the specific model. Customer support available in Italian.

Delivery times?

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

Product safety

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