The VÖLKEL round die BS 1127:1950 is a precision-ground cutting tool made from durable HSS. With an outer diameter of 1 inch (25.4 mm) and Form A (open split), it provides fine adjustability for precise thread fits. Designed for general workshop use, maintenance, and production, it’s ideal for cutting or restoring external metric threads on unalloyed and low-alloy steels up to 800 N/mm².
| Standard | BS 1127:1950 |
| Thread Type | Metric ISO Thread DIN 13 |
| Form | Form A (Open / Split) |
| Material | HSS-G |
| Outside Diameter | 25.4 mm (1 inch) |
| Tolerance | 6g |
| Application Range | Unalloyed and low-alloy steels up to 800 N/mm² |
How do I adjust the die?
Loosen or tighten the die holder’s screw to slightly open or close the die’s split gap.
Can it be used on machines?
It’s primarily designed for hand use but may be used at low speed on machines with sufficient lubrication.
Which cutting oil should I use?
Use high-performance cutting oil for steel to ensure smooth operation and longer tool life.
Is it suitable for rethreading?
Yes, it’s perfect for restoring damaged or worn external threads with high accuracy.
What’s the benefit of Form A?
Form A (open) gives flexibility in fit adjustment and chip removal, making it ideal for versatile applications.
Need advice on die holders or thread standards? Contact us through our contact form.
| Type of thread | metric ISO-thread |
|---|---|
| Standard | BS 1127; 1950 |
| Form | splitted version (Form A) |
| Material | HSS |
| Tolerance | 6g |
| Size | M 5 x 0.8 |
| Outer diameter | 1" |
| EAN | 4022835279341 |
| Item number | 27934 |
| Thread standard | DIN 13 |
| Rec. Bolt diameter | 4.90 mm |
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