Fluteless Machine Tap with oil groove JIS B-4430 HSSE - UNC No. 8 x 32

• Form internal threads in ductile materials where chip control is critical.
• Use in a machine tool with a suitable tapping chuck to maintain alignment and reduce runout.
• Use high lubricity lubrication, especially for oil groove executions, to reduce friction during forming.
• 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 Thread forming requires correct pre hole preparation and lubrication. Monitor torque and stop if friction rises.

• Chipless thread forming supports cleaner production environments.
• Thread profile is formed by material displacement, which can improve load bearing in suitable materials.
• Suitable for machine use with consistent feed control.
• Reduced risk of chip packing in deep or through holes.

• Not suitable for brittle materials with low ductility where forming can cause cracking.
• Requires precise pre hole preparation and strong lubrication to control torque.

1. Ensure the pre hole is drilled and deburred and that the entry is chamfered.
2. Clamp the workpiece so the hole axis stays aligned with the spindle.
3. Mount the fluteless tap in a suitable tapping chuck to control alignment.
4. Apply high lubricity lubricant to the tool and to the hole entry area.
5. Start the forming process with controlled feed so the tap follows the hole axis.
6. Monitor torque and stop if friction increases unexpectedly.
7. Retract the tap following your machine sequence and keep the hole clean from debris.
8. Clean the tool and verify thread fit with the matching screw or a gauge.

• 1 piece: Fluteless Machine Tap with oil groove JIS B-4430 HSSE - UNC No. 8 x 32

• Product type: Fluteless machine tap for thread forming
• Standard: JIS B-4430
• Thread designation: UNC No. 8 x 32
• Thread system: UNC
• Tool material: HSSE, HSS
• Design feature: Oil groove
• Tool principle: Thread forming

What is the difference between a thread forming tap and a cutting tap?

A thread forming tap displaces material to form the thread profile and does not produce chips, while a cutting tap removes material and produces chips.

Which materials are suitable for thread forming?

Thread forming is best suited for ductile materials, and it is generally not suitable for brittle materials where forming can cause cracking.

Why is lubrication critical for fluteless taps?

Lubrication reduces friction and forming torque, which supports a stable process and helps protect the thread surface.

Which holder is recommended for a fluteless machine tap?

Use a suitable tapping chuck or holder that keeps runout low and maintains alignment during the full engagement.

Where can you find additional technical information on fluteless machine taps?

Use this PDF for principle and process notes for fluteless taps: Technical information fluteless machine taps as PDF

How do you verify the thread after forming?

Clean the hole and check fit with the matching screw, and use inspection when the application requires controlled fit.

Where can you find more VÖLKEL threading tool information for selection and application?

Use this catalog for product range and selection help: VD 23 catalog as PDF