If a roller reamer is not cleaned as Redback Drilling Tools recommend, then you may encounter some problems, which we will address on these web pages.
Safety is always important, so before you begin to strip a reamer, you should put on safety glasses, gloves and boots.
The first thing you must do is ensure the reamer is thoroughly cleaned, especially around the cap screws.
Blow all the dirt out of the places difficult to get at. The next step is to clean out the socket head bolts. These are the bolts that hold the wedges in position.
The next step is to clean the sockets all the way to the bottom like in the first picture (above).
If the socket head bolts are not cleaned properly, when the hex key is inserted, it will round out the socket making it extremely difficult to remove.
Now that the socket head bolt is thoroughly cleaned, check your hex key. If the hex key is worn and rounded, then throw it away as it will also round out the socket.
Undo the socket bolts using a solid bar like the one shown right.
Never use a steel hammer to remove parts. It is not only dangerous, but it will also damage the main body of the reamer. If you have to use a hammer, use a copper or lead mallet.
With the socket head bolts and wedges completely withdrawn from the body, the cutters can now be removed.
If the cutters have been left a long time, they may be difficult to remove. If this is the case, soak the cutters in a WD-40 type solution. Try to work the cutters loose with your hands.
A large screwdriver can also be used to free up the cutters. Once the cutters are loose, they can re removed by the normal strap method.
Check the top of the pocket for any burrs or dents. Do not file or grind across the inside of the pockets or the wedge and block surfaces.
Also, check the recoils. Ensure these threads are not protruding above the hole or have sunk too far down the hole.
If this is the case, they must be replaced immediately!
After replacement, ensure the bottom tang is removed by rotating the insertion tool 90 degrees and striking downward with a copper hammer.
Carefully remove the snapped tang from the bottom of the hole with compressed air, and ensure proper disposal.
Lubricating the pocket is very important. Using plenty of Drill Collar compound will save you problems in the long term. Lubricate all the pockets, wedges and screws.
If you are not intending to use the reamer for a while, it must be cleaned and well lubricated before storage.
Also, check the wear on the body by placing a new wedge in an empty pocket.
If there is less than 4mm of wedge above the body, it is safe for further service.
If the wedge is more than 4mm above the body, like the one shown, we strongly advise it is removed from service.
The Redback Roller Reamer is designed to operate for long hauls.
If the reamer is kept cleaned and well lubricated at all times, many simple problems can be avoided.