Hand taps and round dies (set of 36 pcs.) BSW 1/8 – 1/2 | VÖLKEL Hand taps and round dies (set of 36 pcs.) BSW 1/8 – 1/2
You use this threading tool to cut or restore threads in metalworking and maintenance tasks. Selection starts with matching the thread designation in the product name to your drawing and workpiece.
BSW identifies British Standard Whitworth inch threads used on legacy equipment and older fastener systems.
- Cut or restore external threads on rods, studs, and bolts when machine access is limited.
- Use a suitable die holder to keep the die square and to apply even feed along the workpiece axis.
- Use cutting fluid matched to the workpiece material to reduce friction and protect the thread profile.
- Process: manual driving or assisted driving depending on your holder and machine setup
- Use: thread cutting, re tapping, and thread cleaning depending on condition
Note Verify the workpiece preparation before you start and stop if torque increases unexpectedly.
- Creates external threads in one setup when you need flexibility on the shop floor.
- Supports thread restoration on damaged studs and rods if enough base material remains.
- Works well in repair environments where you can control alignment and lubrication.
- Allows quick adaptation to different thread designations without machine programming.
Drawbacks
- External thread cutting is sensitive to alignment and surface preparation.
- Not suitable for high volume production where a dedicated threading machine is required.
- Prepare the rod end with a chamfer and remove burrs to support a clean thread start.
- Clamp the workpiece securely and mark the target thread length for visual control.
- Mount the die in a suitable die holder and tighten the retaining screws evenly.
- Apply cutting fluid and start the die square to the workpiece axis with steady torque.
- Advance with controlled feed and briefly back off when torque rises to clear chips.
- Continue until the required thread length is reached, then reverse out completely.
- Clean the thread and verify fit with a matching nut or gauge.
- Tool type: Hand tap
- Thread system: BSW
- How do you select the correct tool variant from the product name?
- Match the thread designation and standard stated in the product name to your drawing or the mating fastener. Confirm whether you need an internal or external thread tool and whether the thread is left hand or right hand.
- What does the thread designation in the product name mean?
- BSW identifies British Standard Whitworth inch threads used on legacy equipment and older fastener systems.
- How can you get more detailed guidance on hand tapping?
- Technical information hand taps as PDF
- How do you reduce the risk of cross-threading at the start?
- Prepare a clean chamfer and keep the tool axis aligned with the hole or rod axis. Start with controlled torque and stop if the tool tilts or binds.
- Where can you find technical guidance for round dies?
- Technical information round dies as PDF
- What role does cutting fluid play during thread cutting?
- Cutting fluid reduces friction and heat at the cutting edges and it supports chip evacuation from the flutes. Choose a fluid matched to your workpiece material and process.
- How do you verify the result after threading?
- Use the mating part or a suitable thread gauge to confirm smooth engagement and correct fit. Clean the thread first so chips do not mask the result.
- Where can you find more product and application information in a catalog?
- VD 23 catalog as PDF
Do you need help selecting or using the product?
Use the contact form.
