384 TECHNICAL INFORMATION Q Notes on Selection Table 3: Outside Adjustment Range Outside Adjustment Range (mm) Outside Adjustment Range (mm) 600 or Less 5 Over 600~1000 or Less 10 Over 1000~1500 or Less 15 Over 1500~2000 or Less 20 Over 2000~2500 or Less 25 Over 2500~3000 or Less 30 Over 3000 Shaft Center Distance × 0.01 Table 4: Inside Adjustment Range Model Inside Adjustment Range (mm) MA3, T5, XL, MXL 5 MA5, AT5, L 10 MA8, AT10, T10, H 15 [Step 7] Confirming Min. Shaft Center Distance Adjustment Range Refer to the table below for Min. Shaft Center Distance Adjustment Range by considering the mounting and adjustment range. Inward Adjustment Range Outward Adjustment Range C (Shaft distance) For flanged pulleys, allow ample adjustment margin by considering the flange dia . [Step 6] Calculating Minimum Belt Width bc Calculate the minimum belt width from Allowable Transmission Capacity and Allowable Transmission Torque on P.385. t 8IFO B 5SBOTNJTTJPO $BQBDJUZ JT HJWFO BT B DPOEJUJPOBM QBSBNFUFS Allowable Transmission Capacity (Ps) in Table 8 (P.385) is used. bc = P × 104 PS × ZE × z × fw t When a Load Torque is given as a conditional parameter Allowable Transmission Torque (Mds) in Table 9 (P.385) is used. bc = Md × 103 Mds × ZE × z × fw Select standard belt widths larger than the calculated minimum width bc. bc: Belt Width (mm) P: Transmission Capacity (kW) Ps: Allowable Transmission Capacity ZE: Number of Meshing Tooth fw: Width Factor Long Synchronous Belt T10150 : 1.5 Others : 1 ( ) fw: Width Factor Long Synchronous Belt T10150 : 1.5 Others : 1 ( ) Md : Load Torque (Nm) Mds: Allowable Transmission Torque ZE : Number of Meshing Tooth Z: Number of Pulley Tooth Z: Number of Pulley Tooth Driven Side Driving Side Idler t 8IFO BO *EMFS JT VTFE · If use of Idler is unavoidable, always use the Idler on the slack side. · Position the Idler on the inside if possible. When positioning an Idler on the inside, use one with more teeth than the smaller side pulley. For placing the Idler on the outside, use a flat pulley not crowned. Table 5. Minimum Idler Diameter Belt Type Minimum Idler Diameter (mm) MA3 30 MA5, AT5 40 MA8, AT10 80 T5 30 T10 70 MXL 15 XL 30 L 50 H 90 Mounting from the inside Mounting from the outside Idler Idler t -PBE 5PSRVF BOE 5SBOTNJTTJPO DBQBCJMJUZ Load torque and transmission capability should be calculated from absolute max. load values applicable to the belt for safety. t 'PS .VMUJQMF #FMU 1BSBMMFM 6TF · If each belt receives an equal load, calculate with a value of total load divided by the number of belts used. However, if the load on each belt may potentially become uneven, calculate with the max. load applicable on one belt. · The mechanism should be designed to facilitate individual belt tension adjustments.
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