How to store a down hole hammer?

When storing a down hole hammer, it is important to take the necessary steps in order to insure a smooth operation after restarting. Each drill rod should be blown clear of all water. During this process, turn on the in-line lubricator and blow until the rock drill oil can be seen from the bottom end of each drill rod.

Why does a down hole hammer have a lower operating pressure?

When less dense air is supplied to a down hole hammer a lower operating pressure will result. For example: Operating a down hole hammer at 15,000 feet (4,572 m) of elevation at a temperature of 50° F (10° C), a down hole hammer would require almost 75% more volume than at sea level to operate at the same pressure.

What size hammer should be used for drilling a hole?

Hole Size: In most instances, the outside diameter of the hammer closest to the hole size being drilled should be used for most eficient drilling. This reduces the instance of hole collapse and makes cleaning the hole easier. One needs to take into account that there must be suficient annular area around the hammer to pass the drilled cuttings.

How much pressure does a hammer need to unload a hole?

When a hammer is operating under a head of water suficient pressure is needed to unload the hole. This is often referred to as "peak unloading pressure" and is calculated by the depth of the water in the hole. One foot of water in the hole is equal to 0.434 psi (0.03 bar).

How much oil does a DTH hammer need?

airline.DTH hammers need• 1/3rd of imp. pint of oil per hour p BITHead DesignsFlat FaceAlternative design for all rock conditions especially fractured and fissured roc