The VÖLKEL Hand Tap Rougher (DIN 352, HSS-G) is designed for precise hand tapping of M4 x 0.7 internal threads. It is suitable for general use in non-abrasive materials up to 900 N/mm², including unalloyed and low-alloy steels, and works in both through and blind holes. Ground HSS-G cutting edges ensure dimensional accuracy and long tool life at an attractive price point.
Tip: For premium results, use a rougher, intermediate and finisher sequence where applicable.
| Thread form | Metric ISO thread DIN 13 |
| Standard | DIN 352 |
| Material | HSS-G |
| Tolerance | ISO 2 / 6H |
| Size | M 4 x 0.7 |
| Overall length (L1) | 45 mm |
| Thread length (L2) | 13 mm |
| Shank diameter (D2) | 4.5 mm |
| Drive | Square 3.4 mm |
| Article number | 27330-1 |
| Product page | Open link |
| Price | €2.40 |
Can I use this tap in a machine?
This model is primarily intended for hand use. For machine operations, consider taps to DIN 371/376.
Do I need cutting fluid?
Yes. Cutting fluid improves surface finish and extends tool life.
What distinguishes a rougher tap?
The rougher is the first tap in a set and opens the thread profile before intermediate and finisher taps complete it.
How long will the tool last?
With correct lubrication and alignment, the HSS-G tap provides long service life and repeatable accuracy.
Is it supplied individually?
Yes. Single piece, article no. 27330-1, price €2.40.
Need assistance or matching intermediate and finisher taps? Contact us via the contact form.
| Type of thread | metric ISO-thread |
|---|---|
| Standard | DIN 352 |
| Material | HSS-G |
| Tolerance | ISO2 (6H) |
| Size | M 4 x 0.7 |
| Overall length (L1) | 45 mm |
| Thread length (L2) | 13 mm |
| Core hole diameter (D1) | 3.3 mm |
| Shank diameter (D2) | 4.5 mm |
| Drive connector | 3.4 mm |
| Item number | 27330-1 |
| Type of flute | straight fluted |
| Application | for through and blind holes |
| Thread standard | DIN 13 |
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