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DTJ-DK12-250 reversible jaws
DTJ-DK12-250 reversible jaws is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
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 250 mm reversible bolted-on jaws for DIN 6350 12-bolt chucks. Krollit has been an official Bernardo distributor in Italy since 2007.
Logistics
Original spare parts available with 3–5 working days delivery. Customer support available in Italian.
Technical specifications
Technical specifications
Chuck size |
250 mm |
L |
95 mm |
B |
36 mm |
h |
53 mm |
h |
13.5 mm |
A |
19.04 mm |
B |
12.71 mm |
E |
27 mm |
T |
3 mm |
t1 |
4 mm |
z-d |
2-13 |
Warranty
Warranty terms and support procedures are available on the dedicated Krollit page.
View Krollit warranty termsFAQ / Frequently asked questions
Frequently Asked Questions
Ø 250 mm reversible bolted-on jaws — what do "bolted-on" and "reversible" mean?
"Bolted-on" indicates that the jaw consists of two parts: the base body (hard, made of hardened steel) which moves in the chuck's 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 they wear out, 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 250 mm — what is the clamping diameter range for these jaws?
Reversible bolted-on jaws for a Ø 250 mm chuck 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 250 mm chuck), consider smaller jaws or collets. Customer support available in Italian.
Can the bolted-on inserts be replaced separately?
Yes — this is the main advantage of the bolted-on design. 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 can unscrew the fasteners 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 working days delivery. Customer support available in Italian.
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