Standard Thread Repair - Flush Hole
Refer to Safety Glasses Warning .
The use of a cutting type fluid is recommended when performing the drilling, counterboring and tapping procedures. Refer to Adhesives, Fluids, Lubricants, and Sealers for recommended cutting fluid.
When installed to the proper depth, the flange (1) of the insert will be seated against the counterbore of the drilled/tapped hole and just below the surface (2) of the base material.
- During the drilling process, it is necessary to repeatedly remove the drill and clean chips from the hole and the flutes of the drill.
- Do NOT drill any further than the original hole depth.
- Drill out the threads of the damaged hole.
Specifications
- M6 inserts require a minimum drill depth of 15 mm (0.59 in).
- M8 inserts require a minimum drill depth of 20 mm (0.79 in).
- M10 inserts require a minimum drill depth of 23.5 mm (0.93 in).
- Using compressed air, clean out any chips.
- Counterbore the drilled hole to the full depth permitted by the tool (1).
- Using compressed air, clean out any chips.
- During the tapping process, it is necessary to repeatedly remove the tap and clean chips from the hole and the flutes of the tap.
- Ensure the tap has created full threads at least to the depth equal to the insert length.
- Using a suitable tapping wrench, tap the threads of the drilled hole by hand only.
Specifications
- M6 inserts require a minimum tap depth of 15 mm (0.59 in).
- M8 inserts require a minimum tap depth of 20 mm (0.79 in).
- M10 inserts require a minimum tap depth of 23.5 mm (0.93 in).
- Using compressed air, clean out any chips.
- Spray cleaner into the tapped hole. Refer to Adhesives, Fluids, Lubricants, and Sealers for recommended cleaner.
- Using compressed air, clean out any chips.
- Lubricate the threads of the driver installation tool (2) with the EN 42385-110 (1).
- Install the insert (2) onto the driver installation tool (1).
- Apply threadlock sealant, EN 42385-109, LOCTITE 277® or equivalent (1) to the insert OD threads (2). Refer to Adhesives, Fluids, Lubricants, and Sealers for recommended sealant.
- Install the insert (2) into the tapped hole by hand only.
- Install the insert until the flange (2) of the insert contacts the counterbored surface.
- Continue to rotate the driver installation tool (1) through the insert (2).
- Inspect the insert for proper installation into the tapped hole. A properly installed insert (1) will be either flush or slightly below flush with the surface of the base material (2).
- Any installed insert that restricts or blocks an oil or engine coolant passage (3) will need to have the oil or engine coolant passage drilled out (4) to the original size of the oil or engine coolant passage. After drilling the restriction or blockage, clean out any chips and thread the installation driver tool through the insert again to remove any burrs caused by the drilling of the oil or engine coolant passage.
All chips must be removed from the drilled hole prior to tapping.
A properly counterbored hole will show a slight burnishing on the surface of the base material for 360 degrees around the drilled hole.
All chips must be removed from the drilled hole prior to tapping.
All chips must be removed from the tapped hole prior to insert installation.
All chips must be removed from the tapped hole prior to insert installation.
Do not allow oil or other foreign material to contact the outside diameter (OD) of the insert.
If the insert will not thread down until the flange contacts the counterbored surface, remove the insert immediately with a screw extracting tool and inspect the tapped hole for any remaining chips and/or improper tapping.
The driver installation tool will tighten up before screwing completely through the insert. This is acceptable. The threads at the bottom of the insert are being formed and the insert is mechanically locking the insert into the base material threads.