DRIVE CHAINS - Tsubaki
DRIVE CHAINS - Tsubaki DRIVE CHAINS - Tsubaki
Before Use For Safe UseStandard Roller Chains Lube-Free Roller Chains Heavy Duty Roller Chains Corrosion Resistant Roller Chains Specialty Roller Chains Accessories Selection Handling4-2 Formulae (Table 6)1) Perform all selections using a transmission efficiency, including the chain, of = 1.2) Use the values calculated in items 11 and 12 of this table for the tension and kW ratings used for selection.Item SI units Gravitational units1. Chain length (number of links): LOrdinary transmissionPin gear drive2. Chain speed: V3. Chain tension from ratedoutput (kW) of motor: Fm4. Inertia where the motor shaftconverts the moment of inertiaof the load I (GD 2 ) : I (GD 2 )5. Rated torque of motor: Tn6. Working torque: Tm7. Chain tension from starting torque: FmsChain tension from stalling torque: FmbOrdinary transmission between two shafts(1) When the number of teeth and distance between shafts has beendecided for both sprockets: Or Or (2) When the number of links of chain and the number of teeth has been decided: When using a chain with attachment around a drumOrOrEven if the fractional part of the value found for L (below that of thedecimal point) is small, round it up to the nearest integer and add a link.An offset link must be used when an odd number of links exist, however,if possible, change the number of teeth on the sprocket or the distancebetween shafts so that an even number of links may be used.P: Chain pitchD: Outer circumference of drumS: Height of attachmentOrOr : Constants : ConstantsRound L up to an evennumber of links.When attaching the chainattachment around thedrum, insert shims at equalintervals for adjustment.137
Selecting a Roller Chain8. Chain tension when motoraccelerates: FsItem SI units Gravimetric unitsChain tension when motordecelerates: Fb9. Design kW (for general selection)10. Design chain tensionDesign chain tension frommotor: F’mDesign chain tension fromstarting torque: F’msDesign chain tension fromstalling torque: F’mbDesign chain tension fromshuttle drive: F’cDesign chain tension duringacceleration: F’sDesign chain tension duringdeceleration: F’bDesign chain tension fromload: F’w11. Acceleration time of motor: ts12. Deceleration time of motor: tb13. Inertia ratio: R14. Conversion of the flywheel effect (GD 2 )to moment of inertia ( I ) Design kW = Rated kW of motor x Ks (kW) Or If the mass M (weight W) is not known, use the rated torque Tn of the motor tocalculate the shaft torque T = Tn x i kNÆm {kgfÆm}, and use F = 2T/d in place of W. All chain tensions in the above formulae are the tensions when one strand of chain is used.When using two or more strands of chain, calculate the chain tension for one strand and multiply it by the imbalanceload factor Ku (Table 4) for the number of strands used.Before Use For Safe Use Standard Roller Chains Lube-Free Roller Chains Heavy Duty Roller Chains Corrosion Resistant Roller Chains Specialty Roller Chains Accessories Selection Handling138
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Before Use For Safe UseStandard Roller Chains Lube-Free Roller Chains Heavy Duty Roller Chains Corrosion Resistant Roller Chains Specialty Roller Chains Accessories Selection Handling4-2 Formulae (Table 6)1) Perform all selections using a transmission efficiency, including the chain, of = 1.2) Use the values calculated in items 11 and 12 of this table for the tension and kW ratings used for selection.Item SI units Gravitational units1. Chain length (number of links): LOrdinary transmissionPin gear drive2. Chain speed: V3. Chain tension from ratedoutput (kW) of motor: Fm4. Inertia where the motor shaftconverts the moment of inertiaof the load I (GD 2 ) : I (GD 2 )5. Rated torque of motor: Tn6. Working torque: Tm7. Chain tension from starting torque: FmsChain tension from stalling torque: FmbOrdinary transmission between two shafts(1) When the number of teeth and distance between shafts has beendecided for both sprockets: Or Or (2) When the number of links of chain and the number of teeth has been decided: When using a chain with attachment around a drumOrOrEven if the fractional part of the value found for L (below that of thedecimal point) is small, round it up to the nearest integer and add a link.An offset link must be used when an odd number of links exist, however,if possible, change the number of teeth on the sprocket or the distancebetween shafts so that an even number of links may be used.P: Chain pitchD: Outer circumference of drumS: Height of attachmentOrOr : Constants : ConstantsRound L up to an evennumber of links.When attaching the chainattachment around thedrum, insert shims at equalintervals for adjustment.137