If you need a fine and exact thread in a blind hole, the VÖLKEL DIN 374 Form C machine tap is the perfect choice. This tool was developed for maximum precision and is specifically designed for well-machinable materials up to 900 N/mm², such as unalloyed and low-alloy steels. The special geometry with a spiral flute ensures you can cut clean and flawless threads, even in deep blind holes.
This designation is crucial for the tap's application and explains why it is ideally suited for blind holes.
The DIN 374 is a standard that defines the dimensions and tolerances of machine taps for metric ISO fine threads.
For you, this means you can rely on standardized and reproducible quality. The standard ensures that all dimensions, such as the shank diameter, drive square, and overall length, precisely match the specifications. This is particularly important when you use the tap in a machine, as it guarantees a perfect fit and reliable performance.
What is a fine thread and where is it used?
A fine thread has a smaller pitch than a standard thread. It is used when you need a fine adjustment or a higher resistance to self-loosening, for example, in precision mechanical engineering, measuring instruments, or on thin-walled components.
Why is this tap ideal for blind holes?
The combination of the short chamfer (Form C) and the spiral flute with a 35° helix angle is the key advantage. The short chamfer allows for cutting deeper threads, while the spiral flute reliably transports the chips out of the blind hole, preventing tap breakage.
What does the material HSS-E mean?
HSS-E stands for "High Speed Steel with Cobalt." It is a high-quality high-speed steel with a cobalt content. This material is harder and more wear-resistant than conventional HSS steel, making it excellently suited for machining tough and high-strength materials.
| Type of thread | metric-fine ISO-thread |
|---|---|
| Standard | DIN 374 |
| Form | Form C 35° SP |
| Material | HSSE |
| Tolerance | ISO2 (6H) |
| Size | M 14 x 0.75 |
| Overall length (L1) | 100 mm |
| Thread length (L2) | 10 mm |
| Core hole diameter (D1) | 13.25 mm |
| Shank diameter (D2) | 11.0 mm |
| Drive connector | 9.0 mm |
| EAN | 4022835397250 |
| Item number | 39725 |
| Type of flute | 35° Spiral Flute |
| Application | for blind holes |
| Thread standard | DIN 13 |
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