This promotion is not valid on discounted products or on bundled offers.
Chuck Jaws DOJ-DK12-250
Chuck Jaws DOJ-DK12-250 is backordered and will ship as soon as it is back in stock.
Couldn't load pickup availability
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.
Chuck Jaws DOJ-DK12-250
Description
DOJ Ø 250 mm jaws for DK12 chucks — external gripping jaws. Available from Krollit, official Bernardo distributor since 2007.
Logistics
Original spare parts available with 3–5 business day shipping. Customer support in Italian available.
Technical specifications
Technical specifications
Chuck size |
250 mm |
A |
105 mm |
B |
27 mm |
C |
69 mm |
d |
12 mm |
E |
10 mm |
F |
12 mm |
h |
70 mm |
G |
34 mm |
Warranty
Warranty terms and support procedures are available on the dedicated Krollit page.
View Krollit warranty termsFAQ / Frequently asked questions
Frequently asked questions
DOJ Ø 250 mm jaws — what does DOJ mean and how do they differ from DIJ jaws?
DOJ (Direct Outer Jaw) indicates external gripping jaws: the teeth grip from the outside of the workpiece diameter, clamping inwards. These are the standard jaws for clamping bars, shafts, cylinders, and compactly shaped parts. DIJ jaws do the opposite — internal gripping on hollow parts. The same machine can use both DIJ and DOJ depending on the workpiece, as long as the chuck size is compatible.
DK12 series — compatibility with my chuck?
DK12 mounting (12 DIN 6350 bolts). Check your chuck's mounting type before purchase — DK11 and DK12 are not interchangeable. The Ø 250 mm diameter must match the chuck size. Customer support in Italian available.
Hard DOJ jaws vs. soft jaws — when to choose one over the other?
Hard DOJ jaws (hardened) are for general use on steel, cast iron, and rough aluminum — they clamp forcefully without deforming but leave marks on finished parts. Soft jaws (mild steel) do not leave marks on already machined parts and can be turned in situ for maximum concentricity. For finishing operations on already machined parts: soft jaws. For roughing and production on raw parts: hard jaws.
Delivery times?
Original spare parts available with 3–5 business day shipping. Customer support in Italian available.
-
Product safety
-
Reviews
Product safety
