V-COIL rapid STI-Twist Drill, 12.3 mm

• for drilling the prepared hole in a V-COIL rapid repair workflow
• for use before the matching STI tapping step
• for repair work where the stated drill diameter is required
• for controlled hole preparation before insert installation

Note Use the drill only when the V-COIL repair data calls for the stated diameter and continue with the matching STI tap.

• The stated drill diameter gives a clear reference for hole preparation.
• HSSE material is stated in the product name and supports controlled drilling in suitable materials.
• HexDrive or repair-specific execution helps connect the drill to the intended workflow.
• Defined drilling preparation helps prevent wrong follow-up tool selection.

• A drill does not define the finished thread by itself, so verify the following tap or repair sequence before drilling.

1. Confirm the required drilling diameter from the process data.
2. Secure the workpiece before drilling.
3. Align the drill with the intended hole axis.
4. Apply suitable cutting fluid where the material and operation require it.
5. Drill with controlled feed and speed.
6. Remove chips from the hole after drilling.
7. Check the drilled hole before the next machining step.

• 1 piece V-COIL rapid STI-Twist Drill, 12.3 mm

• Product type: V-COIL STI twist drill
• Thread designation: 12.3
• Material: HSS-G
• Diameter: 12.3 mm
• Tool function: hole preparation

What is this drill used for?

It prepares the drilling step in a V-COIL repair workflow before STI tapping.

How do you choose the drill diameter?

Choose the diameter from the repair process data and do not estimate it from a similar thread size.

Can the drill install the insert?

No, insert installation requires the matching insert and inserting tool after drilling and STI tapping.

What should you check after drilling?

Check hole alignment, cleanliness, and diameter suitability before continuing with the STI tap.

Where can you find V-COIL drill information?

Additional V-COIL tapping drill information is available here: Technical information tapping drill sizes V-COIL as PDF

What prevents a wrong repair setup?

Keep drill, STI tap, insert, and insertion tool selected from the same repair size logic.

Where can you find the V-COIL catalog?

You can find the thread repair catalog here: VC 23 catalog as PDF