Funciones adicionales

With the HardTip process, the forming zone of the thread point of a screw is additionally inductive-hardened after previous hardening and tempering or case hardening. Thus, materials which have too high a strength for conventionally hardened screws can also be fastened in a self-tapping way. EJOT^® HardTip screws are used if case-hardened fastening elements are not permitted or conventionally hardened screws would fail because the screw-in material is too strong. 
 
Thread geometries EJOT^® HardTip:
- Spiralform^® 
- SHEETtracs^® 
Further thread geometries upon request.

With the patented "anti cross-threading" points MAThread^® and MATpoint^® for metric standard threads according to ISO 965-2, EJOT is licensee of MAThread Inc., Whitmore Lake, MI, U.S.A. "Cross threading" is caused by the screw being applied at an angle to the female thread. In the worst case, a new thread is formed or the nut or screw thread is damaged. This ultimately leads to the fact that the screw can not be fastened and the connection fails. The MAThread^®/MATpoint^® design prevents this "cross threading" and enables shorter assembly times. It reduces or eliminates outages with all negative consequences such as downtimes, reworks, scrap and service effort.

A raiz de la deformación permanente todas las uniones atornilladas pierden apriete axial después de su montaje. Si este apriete axial baja por debajo de un nivel critico la unión falla. Esto se puede evitar aumentando la elasticidad en la unión atornillada, por ejemplo añadiendo un elemento elastico en el atornillado. La inovadora cabeza SpringHead® de EJOT aporta esta caracteristica elastica y compensa eficazmente los efectos de la deformación permanente sin elementos de muelles convencionales adicional. El muelle integrado de la cabeza de tornillo posibilita poder mantener mejor el apriete axial tanto en cargas dinamicas como termicas y también el contacto electrico permanente.

Geometrias de rosca EJOT SpringHead^®:
- DELTA PT^®
- ALtracs^® Plus
- tornillos metricos
Otras geometrias de rosca bajo demanda.

1. EJOT CONLOK^® - Electric contact
2. EJOT VIBRALOK^® - Thread lock
3. Locking serration Thread lock
4. Friction serration Higher Stripping Torque T_S
5. EJOT CONLOK^® - Ring cutting edge

The EJOT CONLOK^® under-head serrations show a discontinuous cup point with a transfer radius starting at the fastener shank. The number of tooth is variable, according to customer request or application. Only the narrowing form is specified.
Advantage:
- Electrical contact between components and fasteners
- Surface coatings up to a thickness of 70µ (powder coating) can be scratched open
- Increased installation and loosening torques due to free design of the serration tooth

EJOT VIBRALOK^® has been developed as a thread lock for vibration exposed screw heads connecting to metallic surfaces. Independent expert analysis testify the outstanding properties.
Advantage:
- Increasing the loosening torques
- Prevents loosening under vibration stress

Main application fields of EJOT MAXXtip^®

Ultra-high strength steel sheets (at least UTS of 1200 MPa) using the thread types 
- SHEETtracs^® up to 2 mm 
- Spiralform^® analogous to DIN 7500 
cast iron (GJS und GJL) using the Spiralform^® thread type 

More about MAXXtip^®