Garnder-Denver RB94 Stoper Rock Drill

$1,600.00

GARDNER-DENVER
RB94
STOPER ROCK DRILL

WE HAVE 2 NEW GARDNER DENVER STOPER ROCK DRILLS IN STOCK AND READY FOR IMMEDIATE DELIVERY FOR THE LOW PRICE OF ONLY $1600.00!

**Model RB94 Stoper is a powerful, medium weight, self-rotating machine and is equipped with a backhead designed for wet, dry or automatic wet air operated gland.**

RB94 Stoper Rock Drill Specifications
Leg Travel	24"
Chuck Size	1" x 1-1/4":
Weight	110 lbs
Closed Length	60"

SERVICE AND MAINTENANCE

Any preventive maintenance program for rock drills should start with the selection of a good grade of high film strength rock drill oil. All major oil companies are prepared to recommend and furnish lubricants that have proved satisfactory for rock drill service. Constant lubrication with a correct rock drill oil in a Gardner- Denver line oiler will greatly extend the life and improve the operation of a rock drill. It is recommended that the line oiler be filled at the beginning of each shift. Oil should show on the drill steel shanks if the drill is receiving sufficient lubrication.   The Gardner- Denver adjustable-flow air line oiler affords the best means of insuring the proper quantity of oil for the drill.

        Worn shanks and chucks are principle causes of damage to the striking faces of the tappet and piston hammer. The shanks must not be too hard. Shanks should be quenched in oil. The shank end hardness must be such that it can be cut with a mill file without any rasping.

        It is essential to keep the chuck wear within the proper limit to assure proper alignment between the drill steel and the tappet or piston hammer. Worn chucks are the cause of crowned shanks and this promotes rapid cupping of the faces of the piston hammer or tappet. Steel misalignment also results in damage to the water tube.

        It is important that the clearance between the cylinder liner and the neck of the hammer be held within fairly close limits. Excessive clearance between these parts causes hammer breakage, weak rotation and decreased drilling speed. To test for excessive clearance, allow the piston hammer to fall by its own weight toward the front end. It if strikes the front end, there is insufficient cushion between the hammer and the cylinder liner and the latter should be replaced.

        The drill efficiency is also vitally affected by wear of parts in the automatic valve assembly. The necessary parts should be replaced to maintain both seats in good condition and be sure there is no cocking of the valve.

        Rotation parts should be replaced when rotation speed becomes ineffective due to excessive wear of the parts. When replacing chuck driver nut and rifle nut be sure to apply grease, oil or white lead to both the male and female threads. This practice will prevent balling up of the cadmium plate and thus a good fit will be insured and the maximum life will be obtained from the parts.

        Fogging at the exhaust indicates water in the cylinder and usually means that the water tube gasket needs replacing. Fogging at the chuck end usually indicates that the water tube has been cut off.

        Because of friction, air pipe lines of insufficient size and line air hoses greatly reduce the air pressure delivered. It is not uncommon to have sufficient air pressure maintained at the compressor and relative low pressure delivered to the drills. The friction lost with pulsating flow through the best of new air hose is high, loss varies directly with the length of the hose; as the interior of the hose wears, the friction loss becomes higher.

        If the above recommendations are followed, the results will be better performance at lower maintenance cost.