Machine Tap DIN 376 Form B HSSE left hand thread - M 12 x 1.75 LH

• Cut internal threads in pre-drilled holes using a controlled machine process.
• Use a machine tap holder, collet system, or tapping attachment suited to the tap shank and drive.
• Use the correct rotation direction for left hand threads and verify the setup before tapping.
• 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 Use cutting fluid suited to the workpiece material and keep the tool clean and protected after use.

• Supports predictable lead-in when you align the tool to the hole axis
• Helps you achieve repeatable internal thread form in workshop conditions
• Enables controlled chip transport when cutting fluid and reversal are managed
• Reduces risk of cross-threading when the tool is started square
• Helps you maintain process control across single parts and small batches

• Limited suitability for very hard materials unless a dedicated execution is specified
• Not suitable for uncontrolled hand tapping without a guided holder

1. Confirm the thread designation and ensure the workpiece hole is prepared and free of burrs.
2. Secure the workpiece so the hole axis is stable during the tapping cycle.
3. Mount the tap in a suitable machine tap holder and check that the tool runs true.
4. Apply cutting fluid suited to the workpiece material.
5. Align the tool to the hole axis before you start the tapping cycle.
6. Verify rotation direction for left hand threads before you engage the tap.
7. Run the tapping cycle with controlled feed and observe chip evacuation.
8. Reverse out under control when the required thread depth is reached.
9. Clean the thread and the tool, then protect the cutting edges for storage.

Scope of supply is not specified in the provided product data for this item.

• Tool type: Machine tap
• Standard: DIN 376
• Chamfer form: Form B
• Tool material: HSSE
• Thread direction: Left hand
• Thread system: ISO metric
• Tolerance class: 6H

When should you use a machine tap instead of a hand tap

Use a machine tap when you can guide the tool with a machine spindle and a suitable tap holder, and when you want controlled feed that matches the thread pitch.

What holder type do you need for this tap

Use a machine tap holder, collet system, or tapping chuck that supports the tap shank and keeps alignment to the hole axis stable.

What preparation is required before you tap the thread

Prepare the core hole to the correct size for the thread designation, remove burrs, and add a small lead-in chamfer so the tap can start without side load.

How do you control chips and cutting fluid during tapping

Use cutting fluid suited to the workpiece material and clear chips regularly, especially in deeper holes or tougher materials, to prevent chip packing and tool overload.

Where can you find additional technical information for this execution

Use the following PDF for reference on machine tapping basics: Technical information machine taps as PDF

How do you reduce risk of tap breakage

Keep alignment stable, avoid side load at entry, and stop if torque rises sharply so you can inspect hole preparation, lubrication, and chip evacuation.

Where can you find more product and application information in the VÖLKEL catalog

Use this catalog for additional details and related items: VD 23 catalog as PDF

How do you inspect the thread after tapping

Check that the thread is clean, that the start is not damaged, and that the functional fit matches the mating component used in your assembly.