KHK Stock Gears 3013
302SpurGearsHelicalGearsInternalGearsRacksCP Racks& PinionsMiterGearsBevelGearsScrewGearsWormGear PairBevelGearboxesOtherProductsGear TypeBearing Design＊InterchangeabilityMounting DistancePrecisionJIS B 1704 : 1978StrengthBending StrengthDurabilitySurface DurabilityNoise/VibrationSurface Roughness/Total Contact RatioPrice for single itemNo thrust force produced inward SUB、PB、SBZG grade 324.2N・ｍ/12.2N・ｍ2.92N・ｍ/1.46N・ｍ3.2a/1.63No thrust force produced inward SB、SUB、PB grade 226.0N・ｍ/13.1N・ｍ18.4N・ｍ/9.18N・ｍ0.4a/1.84Thrust force produced inward ー grade 256.5N・ｍ/28.2N・ｍ94.2N・ｍ/47.1N・ｍ0.4a/3.13SBZGABCDKEFGJGHIB3Catalog No.Gear ratioModuleNo. of teethHelix angleDirectionof spiralShapeBoreHub dia.Pitch dia.Outside dia.Mounting distanceTotal lengthCrown to back lengthABCDEFGSBZG2-3020RSBZG2-2030L1.5m230207°RLB4B310103530604062.1644.18404526.4825.0521.6216.39SBZG2.5-3020RSBZG2.5-2030Lm2.530207°RLB4B315124535755077.7755.23505533.6931.0527.0819.24SBZG3-3020RSBZG3-2030Lm330207°RLB4B315155045906093.2766.32557035.0140.5027.4527.11SBZG2-4020RSBZG2-2040L2m240209°RLB4B312124032804081.5844.76456031.9134.1526.5821.19SBZG2.5-4020RSBZG2.5-2040Lm2.540209°RLB4B31512504010050102.0155.99557539.1643.7732.0126.50SBZG3-4020RSBZG3-2040Lm340209°RLB4B32016605012060122.3167.21659045.3050.8137.3131.80SpecificationsPrecision gradeJIS B 1704 : 1978 grade 2Gear teethGleasonPressure angle20°MaterialS45CHeat treatment Teeth induction hardenedTooth hardness50～60HRCModule 2～3Ground Zerol Bevel Gears [Caution on Product Characteristics]①Allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see page 283 for more details.②Dimensions of the outside diameter, the overall length and crown to back length are all theoretical values, and some differences will occur due to the corner chamfering of the gear tips.③It produces an axial thrust force, which has the same direction as straight bevel gears. For details, see separate technical reference book (Page 108).○○△△×△◎○○○△○○△△×○○◎○△■Performance ComparisonSBZG2-4020R/2040LGround Zerol Bevel GearsSB2-4020/2040Bevel GearsMBSG2-4020R/2040LGround Spiral Bevel GearsNOTE: The above evaluations were based on a comparison of 3 products.EasyManyNormalNormalBadNormalLowEasyManyGoodNormalGoodLowNormalDifcultNoneGoodStrongGoodLowNormal■Features of Zerol Bevel Gears Zerol Bevel Gears are spiral Bevel gears with a helix angle of less than 10 degree. Balanced, and superior performance as they combine the features of straight / spiral bevel gears.●Allows compact design as no inward thrust force (＊Reference to the gure) is produced, which causes problems when using spiral Bevel gears.●Unlike straight Bevel gears, Zerol Bevel Gears can be ground nished, allowing higher precision, wear-resistance and are quieter, compared with straight Bevel gears.●Drop in replacement for SB Bevel Gears can easily be made due to the gears have similar dimensions for the mounting distance. When replacing, please use a set of zerol Bevel gears with opposite spiral hands, one right-hand and the other left-hand.