TwinBox Short machine tap Form C + reamer HSS-G NPT 1" x 11.5

• Machine Tap use in repair and small batch work, including service workshops and mechanical engineering.
• Thread production on prepared holes or blanks where alignment is controlled by a holder, guide, or machine spindle.
• Process: manual driving or assisted driving depending on your holder and machine setup
• Use: thread cutting, re tapping, and thread cleaning depending on condition
• Use suitable lubrication and remove chips regularly so cutting edges do not pack up.
• Thread system context: match the tool to the NPT specification stated on the part or drawing.

Note VÖLKEL uses and recommends spiral drills from LÖHER. LÖHER product catalog as PDF

• Direct selection by thread designation such as NPT when stated reduces setup mistakes.
• Suitable for workshop processes where alignment and controlled engagement are practical priorities.
• Supports consistent thread quality when you use steady feed and lubrication.
• Works well for maintenance tasks where parts must be reworked to the drawing requirement.

• Not suitable for materials or hardness outside the typical range for the named tool material and execution.
• Not intended for high performance production without a validated process and rigid machine conditions.

1. Prepare the hole or existing thread so entry is clean and burr free.
2. Select a suitable holder and ensure the tool is aligned square to the thread axis.
3. Apply suitable cutting lubricant and start the cut with steady rotation.
4. Maintain even feed without side force so the tool follows the axis.
5. Reverse briefly to clear chips from the flutes, then continue with controlled engagement.
6. Stop when required depth is reached, then back the tool out completely.
7. Clean the thread and tool, then protect the tool from corrosion for storage.

• 1 piece TwinBox Short machine tap Form C + reamer HSS-G NPT 1" x 11.5

• Product type: Machine Tap
• Thread designation: NPT
• Tool material or execution: HSS-G / OX
• Connection context: Pipe thread

What is TwinBox and where do you find an overview? Use this overview for orientation on the TwinBox concept: TwinBox overview as PDF How do you identify the correct thread designation from a drawing? Read the thread system, nominal size, and tolerance from the specification. Use matching gauges or reference tables when inch notation is used. How do you identify the correct thread designation from a drawing? Read the thread system, nominal size, and tolerance from the specification. Use matching gauges or reference tables when inch notation is used. How do you identify the correct thread designation from a drawing? Read the thread system, nominal size, and tolerance from the specification. Use matching gauges or reference tables when inch notation is used. What does the ring or execution label mean for TwinBox items? You use the execution label to separate tool variants and application focus. Match the label to the process requirement and the workpiece material. Where do you find the matching catalog section for this product family? Use the catalog for additional variants and reference information: VD 23 catalog as PDF