HexTap Type DS - Double ended tap, Multi-Drive Form C HSS-G - UN 1.7/8 x 8 | VÖLKEL
HexTap Type DS - Double ended tap, Multi-Drive Form C HSS-G - UN 1.7/8 x 8
Use this HexTap Type DS in heavy equipment maintenance when stable alignment is required for larger UN internal threads.
Form C chamfer supports reliable starting in many common hole situations, and Multi-Drive supports both manual and assisted driving setups depending on your equipment.
- Cut UN internal threads in tough workpieces where you need reliable starting and alignment.
- Rework threads in large parts during overhaul, rebuild, and commissioning.
- Clean damaged first thread turns to improve fastener engagement.
- Support plant maintenance where tooling must be ready for high torque situations.
Note Use careful alignment at the thread start, especially in repair work, because misalignment can damage the first turns quickly.
- Supports controlled UN thread cutting on large components with stable alignment.
- Multi-Drive interface supports torque transfer without slipping when matched correctly.
- Form C chamfer supports reliable lead in and reduced start load.
- HSS-G supports accurate, ground thread profile generation.
- Useful for overhaul and rebuild work where thread quality must be checked.
Drawbacks
- Not suitable for extreme hardness levels or heavy interrupted cuts without careful evaluation.
- Not intended for unattended production where process reliability depends on monitoring.
- Confirm the UN thread requirement for the joint and the part material.
- Prepare the entry area to protect the first thread turns.
- Stabilize the workpiece to avoid side forces.
- Use a high torque capable Multi-Drive driver that fits the interface. Technical information HexTap DS as PDF
- Lubricate thoroughly with appropriate cutting fluid.
- Start the tap straight to maintain alignment.
- Cut the thread while clearing chips at regular intervals.
- Verify smooth engagement and remove any remaining chips.
- HexTap Type DS double ended tap in the selected UN size and execution.
- Size: UN 1.7/8 x 8
- Tool type: HexTap Type DS double ended tap
- Thread type: UN internal threads
- Drive interface: Multi-Drive interface
- Chamfer: Form C chamfer
- Tool material: HSS-G
- Process: manual driving or assisted driving depending on your holder and machine setup
- Use: thread cutting, re tapping, and thread cleaning depending on condition
- What does UN 1.7/8 x 8 mean on the product name?
- It identifies the UN thread size and the pitch in threads per inch as written on the tool. Match it to the mating fastener or drawing, and avoid mixing similar UN sizes.
- Why is a double ended tap common in repair workflows?
- It supports staged thread cutting while keeping the tool footprint short. That helps when surrounding geometry limits tool movement.
- Does Multi-Drive change the cutting result?
- The thread result depends mainly on alignment, lubrication, and correct preparation. Multi-Drive affects how you transmit torque and how easily you can work in confined locations.
- Can you change chamfer form by process settings?
- No, chamfer form is part of the tool geometry. You can influence results with alignment, lubrication, and stable torque control.
- When should you stop and re check the setup?
- Stop if you feel sudden torque increase, binding, or unusual vibration. Continuing can damage the thread and the tool.
- What causes tight running after tapping?
- Residual chips, burrs, or a slight misalignment at the start can cause binding. Clean the thread and check alignment before cutting again.
- Where can you find more technical data and selection guidance?
- For additional specifications and application guidance, see the VÖLKEL catalog. VD 23 catalog as PDF
Do you need help selecting or using the product?
Use the contact form.
