Additional features

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.

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^®

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.

Every screw connection loses clamp load after assembly due to subsidence. If the clamp load falls below a critical level, the connection fails, for example through loosening, separation or a loss of electric contacting. These failures can be prevented by increasing the elasticity in the screw connection, for example with the integration of spring elements into the screw connection. The innovative EJOT^® SpringHead geometry realises this resilient feature and reliably compensates for subsidences without additional, conventional spring elements. The spring integrated in the screw head enables a better clamp load retention under dynamic and thermal stress as well as a permanent electrical contacting. 
 
Thread geometries EJOT^® SpringHead:
- ALtracs^® Xt
- metric screws
Further thread geometries upon request.

More about SpringHead^®

1. CONLOK^® – electric contacting
2. CONLOK^® – fixing, contacting
3. VIBRALOK^® – vibration protection
4. Locking serration – thread lock
5. Friction locking – increase of head friction
6. Rib serration – thread lock
7. Ripplock serration – thread lock

Profilisanje glave sa donje strane EJOT CONLOCK® sadrži prelazni radijus i ivicu kojom se odvaja navojni deo. Broj zubaca je promenljiv, zavisno od zahteva ili aplikacije kupca. Definiše se samo oblik suženja .
Prednosti:
- Obezbeđivanje električnog kontakta između komponenata i elemenata spajanja
- Površinski zaštitni slojevi od 70µm (plastificirani) mogu se izgrebati
- Povećani momenti pritezanja i otpuštanja hodno slobodnom dizajnu ozubljenja

EJOT VIBRALOCK® je razvijen kao posebno ozubljenje protiv labavljenja na glavi zavrtnja koji je izložen vibracijama na metalnoj površini. Nezavisne stručne analize svedoče o njegovim izvanrednim svojstvima.
Prednosti:
- Povećanje momenta otpuštanja
- Osiguravanje od labavljenja prilikom opterećenja vibracijama