Tap Extension 4.9 mm

• Create internal threads in pre drilled holes in common engineering materials.
• Support thread restoration work where an existing thread needs to be re tapped after damage or contamination.
• Use in general mechanical engineering, plant maintenance, and metal fabrication for threaded connections.
• Apply cutting fluid suitable for the workpiece material to reduce friction and improve surface quality.
• 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 Match the thread system and nominal designation in the product name to the part you need to produce or inspect, and work to the relevant standard.

• Supports workshop level repair tasks without complex equipment.
• Helps you produce a defined thread profile for repeatable assembly.
• Fits common shop workflows for threading operations.
• Enables controlled engagement and torque transmission in threaded joints.

• Cutting performance is limited in very hard or abrasive materials compared with dedicated carbide solutions.
• Not intended for high performance production without controlled machine parameters and consistent lubrication.

1. Confirm that the thread designation in the product name matches the hole you need to thread.
2. Prepare the hole and entry chamfer according to the relevant thread standard and remove burrs.
3. Apply a cutting fluid suitable for the workpiece material.
4. Align the tool straight to the hole axis and start with controlled pressure.
5. Continue with steady torque and withdraw periodically to clear chips from the flutes.
6. For machine use, set a suitable tapping cycle and keep the tool aligned through the full stroke.
7. After reaching depth, reverse smoothly, remove the tool, and clean the thread and tool.

• 1 piece: Tap Extension 4.9 mm

• Type: tap

What preparation is required before tapping?
Prepare the hole according to the thread standard for the nominal designation, and remove burrs at the entry. Clean the surface so chips and debris do not enter the flutes.

How do you reduce wear and improve thread surface quality?
Use a cutting fluid suited to the workpiece material and keep the tool aligned during entry. Clean chips from the cutting area and stop if torque rises unexpectedly.

How do you care for the tool after use?
Remove chips and coolant residue, then dry and lightly protect against corrosion if needed. Store the tool so cutting edges do not contact other tools.

Which holder or drive method is appropriate?
For hand taps you typically use a tap wrench for guided manual torque. For machine taps you use a machine holder such as a tapping chuck or collet system that keeps the tool aligned.

How do you choose the correct variant?
Match the thread system and nominal size shown in the product name to the thread you need. Also consider the workpiece material and whether you need a hand guided or machine driven process.

How do you store the product to maintain accuracy and edge condition?
Store it dry and protected from impact, and keep protective caps or packaging in place if supplied. Avoid contact between functional surfaces and other tools.

Where can you find further selection tables and technical guidance in the catalog?
Use the catalog for additional information and selection support. VD 23 catalog as PDF