Application
cutting or reworking internal UN 1.1/8 x 8 threads where the drawing or mating part requires this exact designation
The set covers the rougher, intermediate, and finisher stages for a controlled three stage manual tapping sequence.
right hand thread work in manual tapping setups and controlled repair operations
selection by ISO 529 tool dimensions and the stated thread standard where applicable
inch based fastener maintenance where the Unified thread series must match the existing part
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 Match UN 1.1/8 x 8, tap stage, thread direction, holder fit, and hole preparation before the tool enters the workpiece.
Benefits
HSS-G cutting material is stated in the product data and supports selection by material execution instead of appearance
ISO 529 dimension reference helps you compare the tool with drawings, stock systems, and existing tool lists
tolerance class 2B gives a clear selection reference for the internal thread requirement
set structure keeps the required hand tap stages together for UN 1.1/8 x 8
staged manual cutting reduces the need to force a single tap through the full thread profile
Step by step
Confirm that the component requires UN 1.1/8 x 8 and that thread direction matches the selected tool.
Prepare the tapping hole and secure the workpiece so the tap can enter square to the surface.
Select a suitable tap wrench or guided driving setup for the tap shank.
Start with the rougher tap from the set and keep the tap square to the hole axis.
Apply suitable cutting oil before the cutting edges engage the workpiece.
Turn steadily and remove chips from the flutes at controlled intervals.
Continue with the intermediate tap and then the finisher tap in sequence.
Clean the thread and verify the result with the mating part or an appropriate inspection method.
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