
16E / 16E-H / 16E-P Spray Gun
18
MAN 96150 EN 01
2.2.3 Turbine and Speed Control
The turbine is air-driven and spins at a high rate of speed whenever air
flow is present (i.e., gas head valve is in the run position). Turning the
control ring decreases or increases pressure on the brake plate which
allows the turbine to spin faster or slower, thus adjusting the wire feed
rate.
2.2.4 Countershaft and Bearing Assembly
The following illustration shows the mechanical relationship between
the countershaft, drive shaft, turbine shaft and drive roll gears.
The turbine shaft meshes with the countershaft gear. This results in a
reduction in turn ratio from the turbine shaft to the countershaft. The
countershaft meshes with the drive shaft gear, resulting in a further
reduction in turn ratio to the drive shaft and the lower drive roll and
gear. The upper drive gear engages the lower drive gear only when
wire is being fed. When the upper and lower drive gears engage, the
upper and lower drive rollers grip and feed the wire.
Although the air turbine is light-weight and spins at very high speed
(up to 30,000 RPM), the gear reduction results in a much lower speed
and a much higher torque at the drive shaft. The reduction ratio
through the shafts and gears is not important, except to note that the
16E-H (high-speed) gun has a different turbine shaft and countershaft
gear for higher range of feed rate. Additionally, the upper and lower
drive rolls and gears can be changed to accommodate different
gauges of wires. (See “Hardware Selection” on page 26.)
The countershaft and bearing covers are gasket-sealed to the central
housing and contain Gearlube oil. The oil is circulated through an oil
pump by the motion of the countershaft and drive shaft gear.
Upper Drive Roll / Gear
Lower Drive Roll / Gear
Turbine
Countershaft Gear
Countershaft
Turbine Shaft
Drive Shaft / Gear
16e_gearing