Specification
Type ball housing
- Type A1: With countersunk holes, normal holding force
- Type A2: With countersunk holes, enhanced holding force
- Type B1: With internal thread, normal holding force
- Type B2: With internal thread, enhanced holding force
Type retaining element
- Type AG: With countersunk holes, straight
- Type BG: With internal thread, straight
Ball housing / Retaining element
- Zinc die casting ZD
- Powder coated
- Black, RAL 9005, textured finish SW
- Silver, RAL 9006, textured finish SR
- Stainless steel AISI 630 NI
- Metal injection molded
- Precipitation-hardened
- Matte, shot-blasted GS
Ball
- Stainless steel AISI 420C for ZD
- Ceramic, silicon nitride, black for NI
Spring
Stainless steel AISI 301
Ball guide
Plastic, Polyacetal (POM)
Information
Ball catches GN 4490 are used, for example, to hold flaps and doors closed that must be opened and closed frequently and easily. The material used in the stainless steel version is characterized by high strength, but due to ist martensitic structure, it is only suitable to a limited extent for use in aggressive environments.
The ball catches consist of a ball housing and a retaining element that snaps into the ball housing from the side or front.
Depending on the installation situation, the use of mounting plates GN 4490.1 may be required (see application examples). The slotted holes facilitate positioning. Depending on the slot width, mounting plates GN 4490.2 must be used when fastening the mounting blocks to aluminum profiles.
