1. What are special screws and how do they differ from standard screws?
Special screws are manufactured precisely according to customer drawings. Dimensions, thread, head geometry, and material are freely definable. They replace standard parts where standard parts don’t fit or where higher requirements apply.
2. What types of threaded bushings do you offer and for which applications are they suitable?
Threaded bushings are manufactured according to drawings – metric or imperial, with internal/external threads, knurled or smooth. Typical applications include mechanical engineering, automotive, precision mechanics, metal construction, and repair/maintenance.
3. Which thread standards (metric, American/English) do you support?
Both metric ISO threads (e.g., M series) and UN/UNC/UNF threads. Special threads are also possible, provided a technical drawing is available.
4. What is the maximum machinable diameter for special screws and threaded bushings?
The turning technology covers diameters up to 65 mm – depending on length, material, and complexity.
5. Which strength classes or grades (10.9, 12.9, 14.9) are available?
All common high-strength grades are available. Strength is achieved through material selection and heat treatment. 10.9, 12.9, and 14.9 are standard in our product range.
6. What heat and surface treatments do you offer?
Typical options: tempering, hardening, nitriding, zinc plating, blackening, phosphating, electroplating, and chemical coatings. The selection depends on corrosion protection or strength requirements.
7. How does manufacturing according to customer drawings work – what information is required?
We require: a technical drawing, material specifications, thread type, desired quantity, any tolerances, and surface finish requirements. This is followed by a quotation, production, final inspection, and delivery.
8. How fast is delivery, and what is the process?
After receiving your drawings, we will provide a quote. Delivery time depends on the material, complexity, and quantity, and is usually a few weeks, often faster for standard materials.
9. Can you manufacture Torx® / Torx Plus® drives, and what are their advantages?
Yes. Torx and Torx Plus are available. Advantages: reduced wear, improved power transmission, no tool slippage, ideal for high torque applications.
10. What materials are used?
We process case-hardening steels, heat-treatable steels, free-cutting steels, stainless steel, brass, aluminium, and special alloys, depending on the application.
11. How is quality guaranteed?
Through CNC production, continuous measurements, documented testing processes, and inspection against drawings. Strength and surface tests are also part of the process.
12. Are small batches possible, or only large quantities?
Both. Production is flexible – from individual parts and prototypes to large production runs.
13. Is technical advice available regarding thread or material selection?
Yes. We provide advice on which material and thread are most suitable for the mechanical load, temperature, or environment.
14. What special considerations apply to fine threads or special threads?
Fine threads require precise machining and appropriate material quality. They offer higher holding power with thinner walls. Special threads are manufactured exactly according to drawings – strict tolerances are essential.
15. How are threaded bushings mounted or installed?
Depending on the type: screwed in, pressed in, bonded, or welded. A proper fit in the base material and thorough preparation are crucial to ensure the internal thread holds permanently.
