Polygon Design Tips

Most often, either three-lobe (P3), or four-lobe(PC4) profile can be used. A few rules determine when to use either of them. P3 is used for most of the fixed connections, and when zero backlash is required, especially for frequently separated connections. A tapered P3 prevents a connection from self-locking, by using a 10 degrees included angle, or steeper tapers. The torque on the tapered profile, also generates an axial separating force. (A fastener or lock nut is required)

Most of the sliding connections use the PC4 profile. However, a P3 connection is acceptable with a low torque and high actuating force, as in hydraulic cylinders, and when sliding occurs under no-load.

PC4 sliding connections require greater force for axial movement under torque load than straight-sided splines. At zero torque load, they perform equally well, and often better than involute splines.

Polygon benefits such as increased strength, smaller space requirements, lighter weight, self-centering characteristics, simplified manufacturing techniques, concentricity, and angular orientation accuracy are maximized, when systems are fully designed around polygons from the outset.

Applications

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    Aerospace Industry

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    Bomb Disposal Robot

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    Compressors

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    Crushers

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    Drill Head Units

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    Dynamometers

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    Envelop Manufacturing Machines

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    Film Manufacturing Machines

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    Food Machinery

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    Gas Turbine Couplings

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    Gear Boxes

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    Stamping Machines

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    Glass Mold Machines

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    Harmonic Drives

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    Hydraulic Cylinders

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    Index Machines

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    Injection Molding Machines

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    Machine Tools

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    Marine Diesel Engines

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    Measuring Machines

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    Mechanical Seals

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    Mill Roll Heads

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    Milling Machines

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    Mining Equipment

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    Multi-Spindle Lathe Gear Systems

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    Oil Drilling

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    Packaging Machinery

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    Plastic Extruding Machines

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    Printing Presses

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    Pumps

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    Rotary Engines

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    Satellite Launchers

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    Steel Rolling Machines

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    Textile Machinery

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    Thread Rolling Machines

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    Tool Holders

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    Transmissions

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    Tube Bending Machines

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    Valve Actuators

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    Variable Speed Drives

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    Water Brakes

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    Winding Machines

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    Wire Drawing Machines

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