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(Fleet)TruckPTFE &Technical&HydraulicThermoplasticAlphanumericHose,HoseAir&CoiledToolingApprovals& Products&Hose TubingPneumaticDesignAccessoriesEquipmentIndexFittingsGuidesCalculation of Hose Length for Over-the-Sheave Applications FittingsHose&Fit.InformationAccessories& Parflex Hose -- Calculation of Hose Length for Over-the-Sheave Applications The exact cutoff length for an optimum over-the-sheave assembly depends on the particular mechanical arrangement of the machine. A method for finding an approximate starting point is as follows: 1. Assemble hose with one coupling as shown in diagram. 2. Measure hose length from point 1 to point 2 with hose taut (.985 accounts for 1.56 stretch). (L = length) o 3. Calculation of insert allowance (x) may be found from the coupling dimension tabulations in the fittings section or from direct measurement on the coupling. A 1.5% stretch allowance is provided in this formula. 4. Calculate hose cutoff or free length LF: LF = 0.985 Lo + 2x Where LF includes coupling insert allowance on both ends. 5. Couple the remaining hose end, check crimp, and assemble on the machine. 274 Parker Hannifin Corporation Parflex Division Ravenna, Ohio
Goodyear Rubber Products
