Specially formed screws and similar based on blanks manufactured as cold extrusion parts

Recutting of screws and other connecting elements

By cutting cold extrusion parts, especially screws, we produce smaller quantities of specially formed parts, for example with machine fits, grooves, reduced necks, tapers and other special contours.
On screws for very narrow tolerances, we remove a thin layer of the surface.
Reduced shank screws are also usually produced by recutting of blanks on which the thread is longer.

During the recutting, material is removed deliberately from a blank produced on cold extruders to alter the detail of the form. In this way, low-cost special parts can be manufactured in small batch sizes based on blanks which are produced in large batch sizes as cold extrusion parts.

  • For example, screws with grooves, reduced necks, tapers, incisions
  • Screws with very narrow tolerances
  • Reduced shank screws

The blanks are manufactured in double-stroke technique or multi-stage technique on cold forming presses. Then the blanks are machined with cutting tools.

Low-cost production of special parts in smaller batch sizes by a combination of blanks manufactured in large batch sizes as cold extrusion parts with cutting tools for the respective final form in small batch sizes.

Mechanical engineering, automotive industry, electrical industry, telecommunications industry, etc.

a. Materials
Steel, case-hardened and quenched and tempered steels, high-grade steels; brass, aluminium and other non-ferrous metals

b. Strength classes
3.6 – 12.9

c. Thread types
All common

d. Drive types
All common: PZ – PH – TX – slot – combi-slot and special solutions such as safety drives

e. Head types
All common

f. Dimensions
All common connecting elements from Ø 0.1 mm to Ø 12 mm shank diameter

g. Surfaces
All common: galvanised (CrVI-free, RoHS-conform), nickel-plated, chromatised, Delta-Tone and Seal, Dacromet, Geomet etc. according to automotive and electrical industry specifications (VDA standard)

h. Coatings
Thread locks, thread seals (e.g. Tuflok, ScotchGrip, Precote, Loctite, wax coatings).
Samples according to VDA , PPAP on request

i. Heat treatment
All common: Annealing, carbonitriding, drawing, tempering, case hardening. Others on request

j. Batch sizes
< 30,000 pcs.

k. Documentations
Available for first sampling: Standard ISIR as cover sheet sampling; VDA Volume 2 Level 0-3; PPAP Level 1-3.

Reduced shank screws

Your contact:
Peter Kubitz

Peter Kubitz

Purchasing manager / Key Account

Phone: +49 (0) 23 51 . 97 85 – 0
Fax: +49 (0) 23 51 . 7 85 30
eMail: p.kubitz@eichhoff-schrauben.de

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