We offer our customers a complete professional solutions for plastic injection molding, zinc die casting, assemblies. From the tool creation to series part one contact.

GTK-Prototype UG was founded in 2014 by Tobias Günther and initially dealt with rapid prototyping machines.

Over the years, CNC milling and turning as well as assembly and development work were added due to customer requirements.

GTK-Prototype develops and designs on behalf of customers as well as internally using the most modern CAD systems such as Solid Works, Autodesk Inventor, Fusion 360 and others and inserts them into a comprehensive CAM system.
Through the production of prototypes in medical technology, mechanical engineering and the automotive sector, GTK-Prototype was able to acquire extensive experience in manufacturing.

In 2018, the production option laser cutting was added.

GTK-Prototype is currently based in Neuhausen near Tuttlingen and will move to the newly built company location in Radolfzell in the course of 2022.

We produce elastomer parts up to a specificaion.

The core business of our company is production of conveyor components, machine elements for open pit mines.
Main components that we produce are made of steel, but also we produce various rubber , polyurethane and plastic elements,
Due to constant development of our company we invested in CNC milling, cutting and turning machines.
We have large capacity for production of rubber elements - molding in process of vulcanization.
The elements made of plastic or urethane are either injection molding or cast pouring.
We invite to cooperation with our company

We are a company that manufactures plastic injection molded parts. We manufacture with more than 20 years experience plastic parts according to customer wishes.

With our integrated tooling we manufacture according to technical drawings for patterns or tools with minimal cost. We have 16 injection machines with a Einpritzvolumen for plastic from 1 gr to 6075 gr and a Schliesskrafft 80-800 tons

Year of establishment: 1984

Registered office: Bursa (Turkey)

Built-up area: 2000 m2

Number of Employees: 35

Certification: ISO / TS 16949: 2002 and ISO 9001: ISO 9001: 2000

In addition to our production of plastic goods we satisfy with merchandise on the subject of technical rubber parts all your needs - in best quality!

About us
With our industry expertise, we can help you successfully and promptly implement your production project for mechanical components, assemblies, and housings for small to medium-sized series.

For more than 20 years, we have been experts in die casting, injection molding, and other mechanical processes. Our focus is on cross-process thinking.

In Germany, Europe and Asia (in-house certified production) we manufacture your mechanical components, assemblies or housings.

Our manufacturing services include:

Engineering: Technology consulting (wide range of materials and manufacturing processes); CAD evaluation, construction & development

Prototyping (close to series production; 1,-3,000 pieces) for die casting, injection molding, precision casting, sand casting, PA casting, vacuum casting, CNC milling, SLS & SLY

Series production for batch sizes of up to 25,000 units

Metal: aluminum die casting, zinc die casting, deep drawing, gravity die casting, sand casting
Plastics: injection molding, thermoforming, extrusion
Our Services:

Project-related surface finish
Coordination of the entire production project
Advice along the value chain
Assembly service, measurement reports
International logistics service

The company “Hafelder Kunststoffwerk” was founded in 1945 by Mr. Ing. Zittmayr in Hafeld (Upper Austria).

Back then, only plastic injection machines were used (source drinking basin production).

In 1990, the company was acquired by Friedrich Gruber and continued to operate as a plastic injection moulding plant.

Later, the first spare parts for spring basins were produced in-house. (First machine - Emco 342S).

More and more lathes were gradually purchased, including two machining centers.

From 2000, the company moved to the new premises of a former office furniture factory.

Currently, around 100,000 turned parts are manufactured every month from a wide variety of materials such as brass, stainless steel, copper, cast iron, plastic, titanium, steel, etc.

In 2002, another turning shop (Ing. Arzberger in Trumau), including machines and customers, was taken over.

As a result, our company was almost doubled in size and renamed Hafelder Präzisionteile GmbH.

In recent years, production has increasingly switched to special, turned and milled parts and mainly parts have been manufactured

which must meet high requirements or have very low tolerances in the thousandths range.

As a Swabian family owned company based in Nagold we are a recognized partner of the furniture industry, the woodworking crafts, hardware-dealers, architects and designers, builders and investors. With 10 sales offices spread over the entire country, and over 100 specialized consultants, we are always on site at our customers.