When breaking in a new bit, make sure that In the first 1/3rd of the depth of the first drilled hole use 1/3rd of regular pull-down pressure & 1/3rd regular rpm. In the second 1/3rd of the depth of the first hole use 2/3rd of regular pull-down pressure & 2/3rd regular RPM. In the final 1/3rd of the depth of the first hole use regular pull-down pressure & regular rpm. The bit is now ready to drill with normal operating parameters.
Some other things to consider:
1. Do not drop bits as damage to bearing, cutting structure and threads can result.
2. Protect the threads as damaged threads can lead to cross threading.
3. Use anti-galling grease, a small amount of grease to barely cover the threads. Too much grease can block the air tubes of the bit and cause premature bearing failure.
4. Keep new bits in their original box or in a covered container on the drill.
5. Never leave a new bit in a location where it will become covered with mud and dirt.
6. Protect bits from corrosion when storing for re-use at a later time.
7. Always rotate the bit while in the hole.
8. Always keep the air on while a bit is in the hole.
9. Never leave a good bit at the bottom of a hole.
10. Always use an old bit to clean or re-drill an existing hole.
11. Always put on an old bit to leave the pipe in a service hole.
12. Clean the bit and oil the bearings when the drill rig will be parked for an extended length of time. If possible, remove the bit, clean, oil and store the bit.
13. When cleaning a plugged bit, make sure to clean it from the inside out. Allow water to pass freely through all parts of the bearings.
14. Check bit regularly. - If one cone is hot, the bearings are likely plugged.
Things to consider when dealing with New Rods:
1. Always keep new rods off the ground out of the dirt. Check and clean the threads.
2. Keep thread protector caps on threads when the rod is not in use.
3. Always support the rods at both ends and in the middle.
4. Always inspect new drill rod when it arrives at the site and again before installation on drill.
5. Check the rod for straightness
Things to consider when dealing with Re-used Rods:
1. Never drill with bent rods. Bent rods will cause early bearing failure and severe shirt tail wear on one or two legs of the bit.
2. Excessively worn drill rods make it harder to apply weight on the bit and bend much easier. May cause Bailing Velocity to drop below recommended levels causing early bit erosion.
3. Always use proper storing methods