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Reference: 708.843096
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DISEC Diamond Rok Sferik BKD391-25D1 – Euro Cylinder Protector for ATRA/DIERRE, 31 mm Fixing Centres
DISEC Diamond Rok Sferik BKD391-25D1 mechanical Euro cylinder protector for compatible ATRA/DIERRE locks. Hemispherical Ø50 mm protector with diamond inserts and hard-metal reinforcement, nominal size 25 mm and 31 mm M6 fixing centres. Anti-skating protection, reinforced Flex System mounting and grade 4 burglary resistance declared by DISEC. Offered in bronze and polished brass.
TRUSTED EXPERIENCE SINCE 1913Over 100 years of experience in hardware, tools and technical products.
PHYSICAL STORE & CUSTOMER SUPPORTWe also have a physical store in La Loggia (Turin): real people ready to help before and after your
ORDERS PREPARED WITH CAREWe prepare every order with care
Description
DISEC Diamond Rok Sferik BKD391-25D1 – Euro Cylinder Protector for ATRA/DIERRE Locks
The DISEC Diamond Rok Sferik BKD391-25D1 is a mechanical security protector for Euro profile cylinder locks with compatible ATRA/DIERRE mounting arrangements and 31 mm fixing centres. The system features diamond and hard-metal reinforcements, Flex System mounting and anti-skating protection. DISEC specifies grade 4 burglary resistance.
Diamond reinforcement and security features
The Rok Sferik hemispherical profile reduces accessible gripping surfaces for tools used in forced-entry attempts. Diamond inserts and hard-metal reinforcement are designed to improve resistance to drilling and cutting attacks.
The protector incorporates an anti-skating system intended to resist specific attacks on the rotor, together with the reinforced Flex System, which uses strengthened fixing screws to improve anchoring resistance.
Dimensions and technical specifications
| Type | Hemispherical mechanical cylinder protector |
|---|---|
| Application | Euro cylinder locks – ATRA/DIERRE mounting arrangement |
| Nominal protector diameter | Ø50 mm |
| Nominal size | 25 mm |
| Fixing centres | 31 mm |
| Fixing thread | M6 |
| Reinforcing elements | Diamond inserts and hard metal |
| Mounting system | Flex System |
| Additional protection | Anti-skating system |
| Burglary resistance | Grade 4 |
| Orderable finishes | Bronze, polished brass |
Compatibility and installation
The BKD391-25D1 is intended for compatible ATRA/DIERRE Euro cylinder locks with 31 mm fixing centres. It differs from the BKD291, which uses 38 mm fixing centres; the two mounting arrangements are not directly interchangeable.
Before installation, check the cylinder position, fixing-hole alignment, external door panel thickness and required protector clearance. The nominal 25 mm size must suit the installed cylinder configuration.
A DISEC cylinder protector spacer is listed separately in the Matteoda catalogue. Its suitability must be checked against the protector and the existing mounting arrangement.
Before ordering: check the 31 mm M6 fixing centres, lock mounting arrangement and cylinder projection. Contact Matteoda customer service for technical assistance and estimated delivery times.
Product Details
708.0843074
Specific References
- ean13
- 8029470056005
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DISEC Diamond Rok Sferik BKD391-25D1 mechanical Euro cylinder protector for compatible ATRA/DIERRE locks. Hemispherical Ø50 mm protector with diamond inserts and hard-metal reinforcement, nominal size 25 mm and 31 mm M6 fixing centres. Anti-skating protection, reinforced Flex System mounting and grade 4 burglary resistance declared by DISEC. Offered in bronze and polished brass.