Trading, engineering and processing of electrical insulating materials, winding wires, insulating varnishes as well as winding machines from Dortmund.
Fritz Diel Isoliermaterial für die Elektrotechnik GmbH & Co. KG
Dortmund (Nordstraße 24-26) · Dortmund-Oestrich (Kammerstück 37)New on Amplifa
About Diel
The Fritz Diel Isoliermaterial für die Elektrotechnik GmbH & Co. KG is an owner-managed family business from Dortmund that has been in existence for around 100 years. Its portfolio covers the trading and processing of electrical insulating materials: laminated sheets, sheet insulation materials, mica insulations for high-voltage technology, winding wires and strands made of copper and aluminium, insulating varnishes and resins, adhesive tape systems as well as wound insulating tubes and profiles. Sheet insulation materials are cut as tapes, slot liners, closing wedges and punched parts; windings can be impregnated with impregnating and coating varnishes, impregnating resins and casting resins. In addition, the company plans and manufactures stator coil winding machines and automatic winding machines, transformer and armature winding machines as well as the corresponding tools. Customers come from electrical engineering, electric motor manufacturing, transformer manufacturing, high-voltage technology and telecommunications.
- Site
- Dortmund
- Processes
- Stator coil winding machines & automatic winding machines (planning, engineering, execution), Processing of sheet insulation materials as tapes, slot liners, closing wedges and punched parts, Manufacture of insulating tubes & profiles (wound), Technical consulting, Engineering and execution of stator coil winding machines and automatic winding machines, Research and development of new insulation systems in cooperation with manufacturers, Cutting/processing of sheet insulation materials (tapes, slot liners, closing wedges, punched parts), Import / export
- Materials
- Hard paper type 2061-2063, Inbord hard paper with melamine coating on both sides, Cotton hard fabric 2082, Glass hard fabric 2372.4, Isoval 11 insulation class H 180°C, Magnoval magnetic slot closure material, Polyester glass hard mats, Copper
- Certificates
- Quality assurance
- Industries
- Electrical engineering, Electrical insulation, High-voltage technology, Electric motor manufacturing (inverter operation), Transformer manufacturing, Telecommunications
- 01
Technical consulting
- 02
Engineering and execution of winding machines
- 03
Research & development of new insulation systems with manufacturers
- 04
Cutting/processing of sheet insulation materials
- 05
Impregnation of windings (varnishes, resins, casting resins)
- 06
Shipping / import / export
- 07
Administration of customer copper accounts
Locations
Dortmund (Nordstraße 24-26)
DEHead office / office
Dortmund-Oestrich (Kammerstück 37)
DEBranch & warehouse
- Stator coil winding machines
- Transformer and armature winding machines
- Commutator milling machine K1-K3
- Induction heater
- Type plate embossing device TSP-2
- Isolex
- Cardboard shears
Parts & Products
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Stator coil winding machines & automatic winding machines (planning, engineering, execution)Engineering | – | – | – | – | Copper, Aluminium |
| Processing of sheet insulation materials as tapes, slot liners, closing wedges and punched partsPlastics | – | – | – | – | Laminated sheet, Polyester, Polycarbonate, Nomex, Kapton, DMD fleece-foil-fleece, Isonom NMN laminates, Prepregs |
| Manufacture of insulating tubes & profiles (wound)Plastics | – | – | – | – | Paper, Films, Nomex, Glass, Cotton, Mica, Phenol-melamine-epoxy and silicone resins, GRP |
| Surface | – | – | – | – | Insulating varnishes, Resins, Powder resins, Casting resins |
| Engineering | – | – | – | – | Copper, Aluminium, Mica |
7 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Stator coil winding machine | – | – | – | – | Dortmund |
| Transformer and armature winding machines | – | – | – | – | Dortmund |
| Commutator milling machine K1-K3 | K1-K3 | – | – | – | Dortmund |
| Induction heater | – | – | – | – | Dortmund |
| Type plate embossing device TSP-2 | TSP-2 | – | – | – | Dortmund |
| Isolex | Isolex | – | – | – | Dortmund |
| Cardboard shears | – | – | – | – | Dortmund |
Additional services
Quality
A dedicated responsibility area for quality assurance and IT has been established. In research and development, new insulation systems are created in cooperation with leading manufacturers.
| Evidence | Dortmund (Nordstraße 24-26) |
|---|---|
| Quality assurance |
History
- 1925
Foundation of the Diel company (according to the 100th company anniversary in 2022 'founded one hundred years ago').
- 2022
100th company anniversary; independent mention in an elektromarkt article.
- 2025
Participation in the Coiltech trade fair in Augsburg; exhibition announced for 2026.