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Application

This tap extension according to DIN 377 for 3.4 is used when the tap must reach deeper or less accessible internal thread positions. Select the extension by the square size and the available working length so torque is transferred without side loading the tap.

The extension is a handling accessory, not a cutting tool. It supports manual or assisted tapping setups where access is limited, but the tap, holder, workpiece alignment, and thread data still determine the cutting result.

Application

  • extending tap reach in deeper or less accessible internal threading positions
  • connecting a tap and a driving tool where the square size matches the setup
  • manual or assisted tapping setups that require additional reach
  • maintenance and assembly work where direct holder access is limited

Note Use the extension only with matching square dimensions and avoid side loading during tapping.

Benefits

  • DIN 377 reference supports selection by established holder dimensions
  • stated working range 3.4 mm gives a factual basis for size matching
  • extension design helps transfer torque to a tap in deeper or restricted positions
Drawbacks
  • The accessory works only when the tool dimensions match; choose a different holder size in the Threading tools category if the fit is not correct.

Step by step

  1. Compare the tap square and extension size before assembling the setup.
  2. Insert the tap into the extension until the drive faces are fully seated.
  3. Connect the extension to the selected driving tool.
  4. Align the complete setup with the hole axis before applying torque.
  5. Turn steadily and keep side forces as low as possible during the operation.
  6. Disassemble the extension after use and clean the drive faces.

Scope of supply

  • 1 piece Tap Extension 3.4 mm

Technical features

  • Product type: tap extension
  • Standard: DIN 377
  • Size: 3.4
  • Working range: 3.4 mm
  • Length L1: 95 mm
  • Packaging unit: 1

Frequently asked questions (FAQ)

Question: What is this tap extension used for?

Answer: It extends the reach between the tap and the driving tool in deeper or restricted internal threading positions.

Question: How do you select the correct extension?

Answer: Select the extension by the square size and the working length required by the application.

Question: Does the extension cut the thread itself?

Answer: No. The tap cuts the thread, while the extension transfers torque to the tap.

Question: What should be checked before use?

Answer: Check square fit, alignment, holder connection, and access before torque is applied.

Question: Can the extension be used in narrow assemblies?

Answer: Yes, when the dimensions match and the complete setup can stay aligned without side loading.

Question: Where can you find the holder and threading tool catalog?

Answer: Use the VD 23 catalog as PDF.

Do you need help selecting or using the product?
Use the contact form.

In this category: Threading tools

Additional information
Standard DIN 377
Length 95 mm
EAN 4022835145349
Item number 14534
Square 3.4 mm
Diameter (D1) 8.0 mm
Diameter (D2) 4.5 mm

This tap extension according to DIN 377 for 3.4 is used when the tap must reach deeper or less accessible internal thread positions. Select the extension by the square size and the available working length so torque is transferred without side loading the tap.

The extension is a handling accessory, not a cutting tool. It supports manual or assisted tapping setups where access is limited, but the tap, holder, workpiece alignment, and thread data still determine the cutting result.

Application

  • extending tap reach in deeper or less accessible internal threading positions
  • connecting a tap and a driving tool where the square size matches the setup
  • manual or assisted tapping setups that require additional reach
  • maintenance and assembly work where direct holder access is limited

Note Use the extension only with matching square dimensions and avoid side loading during tapping.

Benefits

  • DIN 377 reference supports selection by established holder dimensions
  • stated working range 3.4 mm gives a factual basis for size matching
  • extension design helps transfer torque to a tap in deeper or restricted positions
Drawbacks
  • The accessory works only when the tool dimensions match; choose a different holder size in the Threading tools category if the fit is not correct.

Step by step

  1. Compare the tap square and extension size before assembling the setup.
  2. Insert the tap into the extension until the drive faces are fully seated.
  3. Connect the extension to the selected driving tool.
  4. Align the complete setup with the hole axis before applying torque.
  5. Turn steadily and keep side forces as low as possible during the operation.
  6. Disassemble the extension after use and clean the drive faces.

Scope of supply

  • 1 piece Tap Extension 3.4 mm

Technical features

  • Product type: tap extension
  • Standard: DIN 377
  • Size: 3.4
  • Working range: 3.4 mm
  • Length L1: 95 mm
  • Packaging unit: 1

Frequently asked questions (FAQ)

Question: What is this tap extension used for?

Answer: It extends the reach between the tap and the driving tool in deeper or restricted internal threading positions.

Question: How do you select the correct extension?

Answer: Select the extension by the square size and the working length required by the application.

Question: Does the extension cut the thread itself?

Answer: No. The tap cuts the thread, while the extension transfers torque to the tap.

Question: What should be checked before use?

Answer: Check square fit, alignment, holder connection, and access before torque is applied.

Question: Can the extension be used in narrow assemblies?

Answer: Yes, when the dimensions match and the complete setup can stay aligned without side loading.

Question: Where can you find the holder and threading tool catalog?

Answer: Use the VD 23 catalog as PDF.

Do you need help selecting or using the product?
Use the contact form.

In this category: Threading tools

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