Manufacturer of cold-extruded parts, set screws and special screws with machining finishing in Balgheim
Karl Schilt GmbH + Co. KG Metallwarenfabrik
Balgheim · Hattingen · Bad DürrheimNew on Amplifa
About Karl Schilt
Karl Schilt GmbH + Co. KG Metallwarenfabrik, based in Balgheim, specializes in the cold extrusion (cold forging) of custom fasteners and is considered a pioneer in working stainless steel with this technology. The company produces chipless formed parts with tolerances down to 10 µm, set screws ISO 4026 to 4029 as pressed or turned parts from M1.6 to M42, and special screws with extremely small head diameters; machining finishing is carried out in-house. Materials processed include steel, stainless steel, aluminium, brass and copper; an in-house hardening plant completes the depth of manufacturing, while surface finishing such as electroplated zinc and zinc flake coatings is handled with qualified partners. Every day, more than 500,000 set screws, special screws and fasteners leave the plants. Customers come from the automotive industry, aerospace, medical technology, the electrical industry and the construction sector. Since 2015, the Schilt group has also included Alfred Ebinghaus GmbH & Co. KG in Hattingen (machining of larger set screws up to M42) and Erich Ulrich GmbH & Co. KG in Bad Dürrheim (cold extrusion up to M18).
- Site
- Balgheim
- Processes
- Cold extrusion, Machining (finishing of cold-extruded parts), Thread rolling on thread rolling machine with integrated chamfering unit up to M16, Manufacture of set screws ISO 4026 to ISO 4029 as pressed or turned parts from M1.6 to M42, Heat treatment in in-house hardening plant, Electroplated zinc coating, Tempering, Thick-layer passivation and sealing
- Materials
- Stainless steel, Steel, Brass, Aluminium, Copper, Brass (special screws), Cold extrusion, Machining
- Certificates
- ISO 9001:2015
- Founded
- 1948
- Employees
- 60
- Industries
- Automotive industry, Aerospace, Medical technology, Electrical industry, Construction industry
- 01
Tool design/Engineering
- 02
Cold extrusion
- 03
Thread rolling
- 04
Machining (finishing)
- 05
Heat treatment (in-house hardening plant)
- 06
Surface finishing (with partners)
- 07
Testing and quality assurance
- 08
Logistics/delivery service
Materials and Processes
Cold extrusion
Chipless forming of wire from 2 to 12 mm on 2-die-3-blow, 4-station and 5-station presses with 10 µm tolerance.
Machining
Finishing of cold-extruded parts, including pointed set screws, on purpose-built equipment.
Thread rolling
Thread rolling machine with integrated chamfering unit up to M16 for process-optimized thread production.
Heat treatment
In-house hardening plant since 1969 as well as tempering for hardening and annealing.
Surface finishing
Electroplated zinc, nickel plating, zinc-nickel, zinc flake (Geomet/Deltaprotekt) and thick-layer passivation for corrosion protection up to 720 h.
Steel
Hardness classes 45H, 33H, 22H and strength classes 8.8, 10.9, 12.9, among others C45PbCr, Cq15, 34Cr4, 42CrMo4, 19MnB4.
Stainless steel
A1 to A5 as well as 1.4301, 1.4305, 1.4401, 1.4404, 1.4567, 1.4571, 1.4578, 1.4021, 1.4303 – core material of the cold extrusion process.
Aluminium
AlMgSi and AlZnMgCu for lightweight fasteners and aluminium pins.
Brass
CuZn36 for machining special applications.
Copper
Cu-OF for electrically conductive fasteners.
Locations of the Group
Balgheim
DEHeadquarters, production and hardening plant
- Lot size
- High-volume series and small series to drawing
- Materials
- Steel, stainless steel, aluminium, brass, copper
- Cold extrusion (2-die-3-blow, 4-station, 5-station up to Ø 12 mm)
- Thread rolling machine with integrated chamfering unit up to M16
- Indexing-dial machines
- In-house hardening plant
- Machining finishing
Hattingen
DEAlfred Ebinghaus GmbH & Co. KG – machining of larger set screws and standard parts warehouse
- Part weight / size
- Set screws up to M42
- Materials
- Steel, stainless steel
- Machining equipment
- Warehouse stocking
Bad Dürrheim
DEErich Ulrich GmbH & Co. KG – cold extrusion and standard parts warehouse
- Part weight / size
- Workpieces up to M18
- Materials
- Steel, stainless steel
- Cold extrusion presses
- Warehouse stocking
Products
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Cold extrusionForming | 10 µm | – | – | – | – |
| Machining (finishing of cold-extruded parts)Machining | – | – | – | – | Steel, Stainless steel |
| Thread rolling on thread rolling machine with integrated chamfering unit up to M16Forming | – | – | – | – | Steel, Stainless steel |
| Manufacture of set screws ISO 4026 to ISO 4029 as pressed or turned parts from M1.6 to M42Forming | – | – | – | – | Steel, Stainless steel, Brass, Aluminium, Copper |
| Heat treatment in in-house hardening plantHeat treatment | – | – | – | – | Steel |
| Electroplated zinc coatingSurface | – | – | – | – | – |
| TemperingHeat treatment | – | – | – | – | – |
| Thick-layer passivation and sealingSurface | – | – | – | – | – |
| Nickel platingSurface | – | – | – | – | – |
| Zinc flake coatings (Geomet, Deltaprotekt)Surface | – | – | – | – | – |
| Zinc-nickel coatingSurface | – | – | – | – | – |
| Tool design / development partnerEngineering | – | – | – | – | – |
| Testing methods: air gauge, opto-electronic quality assurance, optical measuring device for headTesting | – | – | – | – | – |
9 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Cold extrusion press (5-station, up to 12 mm diameter) | – | – | – | 2008 | Balgheim |
| Thread rolling machine with integrated chamfering unit up to M16 | – | – | – | 2009 | Balgheim |
| Indexing-dial machines (wire processing) | – | – | – | 1974 | – |
| Bar automatic machines (historic nut production) | – | – | – | 1948 | Spaichingen |
| Cold extrusion presses (2-die-3-blow presses, 4-station presses) | – | – | Wire diameter 2 to 12 mm | – | Balgheim |
| Hardening plant | – | – | – | 1969 | Balgheim |
| Optical measuring device for head parts | – | – | – | 2009 | Balgheim |
| Air gauge (non-contact) | – | – | – | – | – |
| Opto-electronic quality assurance with multiple cameras | – | – | – | – | – |
Additional services
Quality
Quality management begins with material purchasing and runs seamlessly and fully documented through the entire process chain to delivery. Production uses a non-contact air gauge as well as opto-electronic quality assurance with multiple cameras; first article inspection reports, IMDS entries and works test certificates according to DIN EN 10204 are standard.
| Evidence | Balgheim | Hattingen | Bad Dürrheim |
|---|---|---|---|
| ISO 9001:2015 |
Company History
- 1948
Company founded by Karl Schilt sen. in Spaichingen; production of nuts on bar automatic machines
- 1962
Production switched to set screws
- 1967
Manufacture of set screws from stainless steel
- 1968
Start of production of hexagon socket keys (wrenches)
- 1969
Relocation to Balgheim; commissioning of an in-house hardening plant as well as the first cold extrusion press for chipless production
- 1974
Production from wire on indexing-dial machines
- 1984
Start of chipless production on cold extrusion presses
- 1998
Certification according to DIN EN ISO 9001
- 2000
Death of Karl Schilt jun.; Jürgen Aicher continues to run the family business
- 2006
Expansion of production area to over 3000 sqm
- 2008
Introduction of a 5-station cold extrusion press for diameters up to 12 mm
- 2009
Thread rolling machine with integrated chamfering unit up to M16; commissioning of an optical measuring device for head parts
- 2014
Gerlind Schilt retires after 52 years
- 2015
Merger of the companies Ulrich, Ebinghaus and Schilt to form the Schilt group
- 2017
First joint trade fair appearance of the group at the Fastener Fair Stuttgart
- 2020
Investment in new testing and production technology
- 2021
Planned new building with approx. 2300 sqm of production/warehouse space
- 2022
Dirk Aicher part of the management board since February
- 2023
75th company anniversary celebrated