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This guide is for mechanics, DIY enthusiasts, and anyone who frequently deals with damaged external threads on bolts and shafts. The US PRO 2768 Universal Outside Thread Chaser Repair Tool quickly restores threads to near-original condition, saving time and the cost of replacement parts. A key consideration is that it is designed specifically for *outside* threads within a certain diameter range and requires selecting the correct chaser insert for optimal results.
| Model Part Number | 2768 |
|---|---|
| Brand | us pro |
This tool is designed exclusively for *external* (outside) threads found on bolts, shafts, and studs. It cannot be used on internal threads (like nuts or tapped holes).
The tool is effective on external threads with diameters ranging from 35mm up to 125mm (approximately 1¼ inches to 5 inches).
You need to identify whether the thread is Metric or Inch and its pitch (mm) or TPI. The included chaser sets are labeled to help you match the tool to the thread size and type you are working with. Start with the closest match.
The tool is designed with a die-cast alloy grip specifically to avoid damaging good threads. However, always ensure you start on an undamaged section and use moderate, controlled pressure.
The metric chaser inserts cover pitches of 1mm, 1.25mm, 1.5mm, 1.75mm, 2mm, 2.5mm, 3mm, and 3.5mm.
The inch chaser inserts cover TPI sizes of 4, 5, 6, 7, 7.5, 9, 11, 11.5, 8, 10, 12, 14, 16, 18, 20, and 24.
This tool is best suited for restoring threads that are slightly burred, mashed, or lightly damaged. It is not intended for repairing severely stripped, cross-threaded, or broken bolts. For such issues, replacement of the component is typically required.
Yes, the US PRO 2768 Universal Outside Thread Chaser Repair Tool is supplied in a handy clip-shut carry case for convenient storage and organization.
Ensure the tool is sufficiently loosened before placement. Check that the selected chaser insert is the correct size and is properly seated within the tool.
Verify that the correct chaser insert size and type (Metric/Inch) are being used. Ensure you are starting from the undamaged section of the thread and working towards the damaged area. For severely damaged or cross-threaded bolts, this tool may not be sufficient, and professional repair or replacement might be necessary.
Confirm the chaser insert is correctly aligned with the existing thread. Apply consistent, slight pressure as you work the tool back and forth. Ensure the tool itself is securely gripping the shaft without overtightening.
Clean the tool and chaser inserts thoroughly. Check for any obstructions or debris. If threads are heavily corroded, a penetrating oil might help, but use sparingly.
Setup:
Compatibility:
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