Bevel-helical speed reducers B4 bushing Side Radial shaft seal with dryrunning p B4-HV12-B

Flender/Flender Gear Units/Bevel-helical speed reducers B4

tooth root stress /mm2 Contact stress /mm2 lim Allowable stress number for contact stress /mm2 H0 Nominal value of contact stress /mm2 HP Permissible contact stress /mm2 Shaft angle/C1 Sum of dedendum angles/C1 fC Sum of dedendum angles for constant slot width taper/C1 fS Sum of dedendum angles for standard taper/C1 fM Sum of dedendum angles for modied slot width taper/C1 fU Sum of dedendum angles for uniform depth taper/C1 Angle between two contact lines/C1 Rotation angle rad Angular speed, angular frequency 1/sxvi Symbols and Units Typical Indices Index Denition , , , Characteristic points on path of contact Tooth tipb Base circleC Coast side , , Pitch point, helix point, mean point Drive sidee Outer cone (heel) or effectivef Tooth root Inner cone (toe) Mean conen Normal sectionP Reference prole or basic crown gear Virtual crossed axes helical gear Transverse sectionv Virtual cylindrical gearx Any point Any point on the path of contact Any point0 Generating tool1 Pinion2 Wheel Typical Abbreviations Abbreviation Denition Starting point of path of contact Inner point of single-ank meshC Pitch point Outer point of single-ank mesh End of path of contactEWP Single-ank testFH Face hobbing (continuous indexing)FM Face milling (single indexing) KS Structure-borne noise KSP Structure-borne noise testZWP Double-ank test2F Two-face grinding 3F Three-face grindingSymbols and Units xvii ThiS is FM Blank Page Contents 1 Fields of Application for Bevel Gears ....................... 1 1.1 Historical Aspects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2 Vehicle Transmissions ............................... 2 1.3 Aircraft Engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1.3.1 Aircraft Turbines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.2 Helicopter Gears . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 1.3.3 Flap Drives on Aircraft Wings . . . . . . . . . . . . .