PolarStar Kythera M3 Orifice Screw
Available Sizes: 0.015", 0.19", 0.24", 0.29"
These metering screws are used to adjust the speed of the nozzle as it returns forward. There is a precision orifice through the screw that limits flow into the dump chamber. The smaller the orifice, the slower the nozzle moves.
As of serial number 4581, Kythera SA systems ship with the 0.024" screw installed. To reduce nozzle speed, select a screw with a smaller orifice size. The majority of installs operate fine with the stock screw. If it is already feeding reliably, there isn't much to gain by reducing nozzle speed.
The 0.015" screw is an extreme reduction in flow and will significantly impact nozzle speed and maximum rate of fire. We do not recommend this size except in special cases.
Orifice Size vs Input Pressure
Since the metering screw limits recharge rate and nozzle speed, the maximum rate of fire will be reduced if a smaller orifice is used at the same input pressure as a larger orifice. The smaller screws are generally used at higher pressures where the nozzle speed has increased due to additional force/flow, so in most cases max rate of fire has already increased and the smaller orifice is only reducing back down to where it was originally.
NOTE: The metering screws have a 1.5mm hex drive. Be very careful when installing or removing them as to not strip the drive. There is no need to torque them so FINGER TIGHT ONLY.
Compatibility: PolarStar Kythera
More About PolarStar and why we carry PolarStar:
“PolarStar Precision Airsoft was formed in January 2009 to fill a need for high quality, precision manufactured airsoft components designed for performance and longevity.
The 2011 release of the patented Fusion Engine HPA system marked a change in direction for PolarStar. The focus shifted from developing upgrade components within the constraints of existing systems to developing innovative HPA systems and accessories which replace the aging AEG technology."
To view our full selection of PolarStar products click here!: PolarStar products at Amped Airsoft.