Page 24 BB4500-BB5000 Operating Manual
2.4.4 Air motor
The 3 hp (2.24 kW) air motor is reversible and operates
under the specifications listed in Table 2-14.
The available air motor assemblies produce boring bar
speeds and torques listed in Table 2-15.
The assembly includes the RDU mounting flange and associated hardware. For a
complete air-powered system, order an air motor assembly and connection pack-
age. The air connection package contains an air filter and lubricator, and hoses
with quick disconnect fittings.
To maintain the air motor and avoid invalidating your warranty, always
route incoming air through the pneumatic conditioning unit (PCU).
2.4.5 Pneumatic conditioning unit
The PCU (shown in Figure 2-12 on page 25) provides clean dry air and lubrication
to the air motor. Install the PCU in the air supply circuit immediately before the
BB4500 or BB5000.
Always stop the machine and lock out/tag out the PCU before making
adjustments to controls or machine components. Failure to follow this
safety precaution may result in severe injury.
TABLE 2-14. CONTROL BOX
Air pressure required: 90 psi (6.2 bar)
Air flow required: 95 ft3/min (2.7 m
3
/min)
TABLE 2-15. BAR RPM AND TORQUE AT MAXIMUM HP
Air motor part number Bar RPM Torque
28614 120 RPM 115 ft-lb (156 Nm)
28697 57 RPM 234 ft-lb (318 Nm)
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