HexTap Type DS - Double ended tap, Multi-Drive Form C HSS-G - UN 1.5/8 x 8

• Produce internal UN threads to the specified UN 1.5/8 x 8 geometry in prepared holes
• Use: thread cutting, re tapping, and thread cleaning depending on condition
• Process: manual driving or assisted driving depending on your holder and machine setup
• Use in plant engineering tasks where stable guidance is required

Note Verify the standard and preparation, then drive with steady torque and sufficient lubrication.

• Double ended UN tap supports practical use when you alternate between cutting and rework
• Multi Drive enables adaptable driving methods for confined access
• Form C lead supports controlled starting in prepared holes
• HSS-G supports consistent cutting action under controlled hand feed
• UN 1.5/8 x 8 size supports repeatable results when preparation is correct

• High torque applications may require additional guidance depending on setup
• Not intended for aggressive production cycle times in automated machining

1. Secure the workpiece to keep the hole axis fixed.
2. Prepare the hole according to the standard and the required thread.
3. Remove burrs at the entry edge.
4. Mount the tap in a compatible Multi Drive driver.
5. Align the tool square to the hole.
6. Apply appropriate cutting fluid.
7. Drive the tap with controlled torque and consistent guidance.
8. Withdraw the tool and clear chips from the area.
9. Check the result with a matching fastener or gauge.

• 1 piece HexTap Type DS double ended tap for UN 1.5/8 x 8 UN internal threads

• Tool type: Double ended tap for internal threads
• Thread system: UN
• Thread size: UN 1.5/8 x 8
• Threads per inch: 8
• Chamfer: Form C
• Material: HSS-G
• Drive: Multi Drive

Question: What does the size UN 1.5/8 x 8 tell you?

Answer: It identifies the UN thread size and the 8 threads per inch value shown in the designation, so you can match the tap to the required fastener.

Question: When do you use a double ended tap instead of a multi piece hand tap set?

Answer: You use it when you want a compact tool format and you can maintain alignment by hand, for example during repair, rework, or low volume machining.

Question: How do you choose between manual driving and assisted driving?

Answer: Choose manual driving when you need fine feel and access is limited, and use assisted driving when you need steadier torque and your setup supports controlled alignment.

Question: What does Form C indicate in practice?

Answer: Form C refers to the lead geometry at the start of the tap, which affects how the tool enters the prepared hole and how you establish straight guidance.

Question: What should you watch when tapping larger UN sizes?

Answer: Keep the tap aligned, use suitable cutting fluid, and avoid side loading, because those factors influence thread accuracy and tool life.

Question: Where can you find technical information for HexTap DS?

Answer: Use the VÖLKEL PDF for specifications and guidance: Technical information HexTap DS as PDF

Question: Can you use the tool for thread cleaning only?

Answer: Yes, depending on thread condition you can use it to clean an existing thread, but you still need correct alignment and lubrication to avoid removing unnecessary material.

Question: Where can you find the VÖLKEL catalog for threading tools?

Answer: For an overview of the threading tools range and selection guidance, refer to: VD 23 catalog as PDF