Hand Tap Taper JIS B-4430 Form A HSS-G - UNF 1" x 12

• Hand 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 UNF specification stated on the part or drawing.

Note Clean threads and tools before use, apply suitable lubrication for cutting operations, and stop if resistance rises sharply.

• Direct selection by thread designation such as UNF 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 Hand Tap Taper JIS B-4430 Form A HSS-G - UNF 1" x 12

• Product type: Hand Tap
• Thread designation: UNF
• Tool material or execution: HSS-G