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MAINTENANCE SECTION

Always wear eye protection when operating or
performing maintenance on this tool.
Always turn off the air supply and disconnect the air
supply hose before installing, removing or adjusting any
accessory on this tool, or before performing any
maintenance on this tool.

LUBRICATION

Each time a Series RG2 Drill is disassembled for
maintenance and repair or replacement of parts, lubricate
the tool as follows:
1. Coat all exposed gears with IRAX No. 67 Grease and

work some of the Grease into the gearing of the
Spindle Assembly (29).

2. Use IRAX No. 10 Oil to lubricate the motor. Inject

approximately 1 to 2 cc of oil into the air inlet before
attaching the air hose to the tool.

SPEED ADJUSTMENT

Series RG2 Drills are furnished with the ability to precisely
control, within certain ranges, the optimum drilling speed
for exotic materials. Setting the speed requires a
tachometer and a jeweler’s screwdriver. Therefore, the
adjustment, although simple, should only be attempted by a
competent technician using the proper equipment.
A small, round opening is located adjacent to the Inlet
Bushing Assembly (4) in the molded exhaust vent. A tiny
screw at the bottom of that hole controls the location of the
exhaust control plate. Take an initial reading of the tool
speed by applying a tachometer to the end of the Chuck
without a drill bit and with the trigger completely
depressed. If the tachometer has a concave tip, close the
chuck completely; if the tip is convex, open the chuck
completely.
After determining the actual velocity, shut off the air supply
and insert a small jeweler’s screwdriver into the slot of the
exhaust control plate screw and rotate the screw
approximately fifteen degrees. Restore the air supply and
check the velocity again. The control plate provides
unrestricted exhaust for 90 degrees, completely restricted
exhaust for 90 degrees and variable, adjustable exhaust for
180 degrees. Determine which direction you need to rotate
the screw to obtain the desired speed and then move the
screw accordingly. Best results are achieved by using
gradual increments and frequent tachometer readings. Be

sure to turn off the air supply when making adjustments to
the screw.

DISASSEMBLY

General Instructions

1. Do not disassemble the tool any further than necessary

to replace or repair damaged parts.

2. Whenever grasping a tool or part in a vise, always use

leather--covered or copper--covered vice jaws to protect
the surface of the part and help prevent distortion. This
is particularly true of threaded members and housings.

3. Do not remove any part which is a press fit in or on a

subassembly unless the removal of that part is
necessary for repairs or replacement.

4. Do not disassemble the tool unless you have a

complete set of gaskets and o--rings for replacement.

Disassembly of the Tool

Each Series RG2 Drill is made up using three modules or
units which include a housing and throttle unit, a motor unit
and a combined gearing and spindle unit. The tool can be
disassembled for repairs to each individual unit without
disturbing the other units. To separate the modules,
proceed as follows:
1. Remove the Chuck (35) using the following technique:

a) Insert the short leg of a 1/4” hex wrench into the

jaws of the Chuck and tighten the Chuck.

b) Using a brass hammer, sharply rap the long leg of

the wrench in a counterclockwise direction to
loosen the Chuck.

c) Unscrew and remove the Chuck from the spindle.

2. To separate the Gear Case (30) from the Housing (1),

proceed as follows:

a) Install a standard 1--1/16” open end wrench on the

flats of the Gear Case.

b) Grasp the handle portion of the Motor Housing and

rotate the Housing counterclockwise to begin
unscrewing it from the Gear Case.

c) When the Housing begins to turn freely, remove the