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 Handling3) Using a straightedge (or a scale), adjust the twosprockets so that they are parallel. Adjust to withinthe following values based on the distance betweenthe shafts.Up to 1 m 1 mmDistance between shafts(mm)1 m to 10m 10,00010m or more 10 mmCatenary sideStraightedgeFig. 17: Sprocket misalignmentCatenary sideGap4) Secure each sprocket to the shaft with a powerlock, lock sprocket, or key (if needed use a collar,set bolt, etc.).4.5 Layout ( indicates the driver side in the illustrations)1) General layoutIdeally the line connecting the sprocket centers in theroller chain transmission equipment should be closeto level. In a layout that is close to vertical, the rollerchain may stretch and fall off the sprocket. Thus, anidler or tensioner should be used. If possible keepthe angle of inclination within 60°.Fig. 18: General layoutFig. 19: Layout when the center-to-center distance is shortIntermediate idlerCatenary side2) Layouts requiring caution(1) When the slack is on the upper sideWhen the center-to-center distance between theshafts is short, move the shafts to adjust the distanceand slightly increase the tension.When the center-to-center distance is long, insertan intermediate idler under the slack part to supportthe roller chain.(2) When the chain speed is fast and the load variesRoller chain may vibrate if the natural vibration frequencyof the chain, shock frequency of the drivenmachine, or chordal action of the chain (verticalpulsation of the chain due to the polygoneffect) synchronize. In this event, use a guideshoe (made of NBR or ultra-high polymer polyethylene)or other device to stop the vibration.Fig. 21: Guide shoe to prevent vibration(3) When the centerline is verticalInstall a tensioner that can automatically eliminateexcess slack. This is particularly necessary whenthe drive shaft is on the bottom.TensionerGap of 2 to 4 mm betweenchain and contact surfaceFig. 22: Vertical transmission4.6 Lambda Curved Chain installation1) Installing the guideCompared to a standard chain, a Lambda CurvedChain has a larger gutter between the pins andbushes, providing a greater degree of freedom. Forthis type of chain, please install a guide on the chainso that it engages straight onto the sprocket.GuideGuideLambda Curved ChainSprocketGuide shoeTensioner2) Minimum lateral bending radius (r)Please manufacture the chain so that its minimumlateral bending radius is equal to or greater than thespecifications shown below.Minimum lateral bending radius (r)Fig. 20: Layout when the center-to-center distance is longRS40-LMC-CU-IRS50-LMC-CU-IRS60-LMC-CU-I400500600163
Handling of roller chain and sprocket5. Sprockets5.1 Hardening of the teethWhen a sprocket is used under the following conditions,the sprocket teeth must be hardened.1) When there is a small number of teeth (24 or less), and thespeed is 1/8 or higher of the maximum rotation speedindicated on the kilowatt ratings tables.2) When using small sprockets with a speed ratio of greaterthan 4:1.3) When a large load is used at low speed (when using theLow-Speed Selection Method).4) When using under conditions that will cause wear to the teeth.5.2 Number of teethAs many teeth as possible should be used on thesprocket on the high-speed shaft side to help ensuresmooth drive transmission. Generally, 15 or moreteeth should be used. However, when the speed ratiois high and the number of teeth on the low-speedsprocket exceeds 120, chain engagement problemscan occur when there is even slight chain wear. In thiscase, decrease the number of teeth on the highspeedsprocket, but the number of teeth should stillbe kept to 13 or higher. However, if the sprocket willbe used at extremely low speed and not subjected toshock, a sprocket with 12 or fewer teeth can be used.5.3 Precautions related to additional processing1) Shaft hole processingMaximum shaft hole processing dimensionsThe maximum finished shaft hole size should be ator below the size shown in the specifications foreach model number. Please consult Tsubaki if usingstandards other than the JIS standards key.Processing standardsa AWhen processing, verify thestandards for the tooth outerb Adiameter ("DO" in the diagram)Aand the hub outer diameter ("DH"in the diagram).DODHAlso, verify that the deflection onthe bottom of the tooth ("a" in theHubdiagram) and the deflection onTooth shapethe end surface of the tooth ("b" inthe diagram) are at or below thevalues shown below.2)3)When using machine specificationsDiameter oftooth-bottom cylinder 90 or less 90 but 190 190 but 850 850 but 1180 Greater than 1180Deflection at tooth bottom a 0.15 0.0008df0.08 0.76Face runout0.25 0.0009df0.08 1.14Sprocket weldingWhen welding a hub to A-type sprockets for use, thewelding can cause deformation or deflection of thetooth and surface, making it impossible to maintainproduct quality. As such, welding should be avoided.With the A-type strong series sprocket, welding canalso decrease the hardness of the sprocket, soagain, welding should be avoided.Processing on the hub outer diameterDo not perform any additional processing to theouter diameter of the hub. If processing needs tobe performed, please first consult with Tsubaki.New JIS key (Table 5)Parallel keyShaft hole diameterdShaft hole diameterdDesignated key diameter Keyway depthShaft Heightb h Shaft t1 Boss d+t26 8 22 1.2 d 1.08 10 33 1.8 d 1.410 12 44 2.5 d 1.812 17 55 3.0 d 2.317 22 66 3.5 d 2.820 25 77 4.0 d 3.022 30 87 4.0 d 3.330 38 108 5.0 d 3.338 44 128 5.0 d 3.344 50 149 5.5 d 3.850 55 1510 5.0 d 5.050 58 1610 6.0 d 4.358 65 1811 7.0 d 4.465 75 2012 7.5 d 4.975 85 2214 9.0 d 5.480 90 2416 8.0 d 8.085 95 2514 9.0 d 5.495 110 2816 10.0 d 6.4110 130 3218 11.0 d 7.4125 140 3522 11.0 d11.0130 150 3620 12.0 d 8.4140 160 3824 12.0 d12.0150 170 4022 13.0 d 9.4160 180 4226 13.0 d13.0170 200 4525 15.0 d10.4200 230 5028 17.0 d11.4230 260 5632 20.0 d12.4260 290 6332 20.0 d12.4290 330 7036 22.0 d14.4330 380 8040 25.0 d15.4380 440 9045 28.0 d17.4440 500 10050 31.0 d19.5Note: The nominal dimensions shown in parentheses are not defined ininternational standards.Old JIS key (Table 6)Parallel keyDesignated key diameter Keyway depthShaft Heightb t2 t1 Shaft t1 Boss dt210 or higher 13 Greater than 44 2.5 d 1.513 or lower 20 55 3.0 d 2.020 30 77 4.0 d 3.030 40 108 4.5 d 3.540 50 128 4.5 d 3.550 60 1510 5 d 560 70 1812 6 d 670 80 2013 7 d 680 95 2416 8 d 895 110 2818 9 d 9110 125 3220 10 d10125 140 3522 11 d11140 160 3824 12 d12160 180 4226 13 d13180 200 4528 14 d14200 224 5031.5 16 d15.5224 250 5635.5 18 d17.5Before Use For Safe Use Standard Roller Chains Lube-Free Roller Chains Heavy Duty Roller Chains Corrosion Resistant Roller Chains Specialty Roller Chains Accessories Selection Handling164
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Handling of roller chain and sprocket5. Sprockets5.1 Hardening of the teethWhen a sprocket is used under the following conditions,the sprocket teeth must be hardened.1) When there is a small number of teeth (24 or less), and thespeed is 1/8 or higher of the maximum rotation speedindicated on the kilowatt ratings tables.2) When using small sprockets with a speed ratio of greaterthan 4:1.3) When a large load is used at low speed (when using theLow-Speed Selection Method).4) When using under conditions that will cause wear to the teeth.5.2 Number of teethAs many teeth as possible should be used on thesprocket on the high-speed shaft side to help ensuresmooth drive transmission. Generally, 15 or moreteeth should be used. However, when the speed ratiois high and the number of teeth on the low-speedsprocket exceeds 120, chain engagement problemscan occur when there is even slight chain wear. In thiscase, decrease the number of teeth on the highspeedsprocket, but the number of teeth should stillbe kept to 13 or higher. However, if the sprocket willbe used at extremely low speed and not subjected toshock, a sprocket with 12 or fewer teeth can be used.5.3 Precautions related to additional processing1) Shaft hole processingMaximum shaft hole processing dimensionsThe maximum finished shaft hole size should be ator below the size shown in the specifications foreach model number. Please consult <strong>Tsubaki</strong> if usingstandards other than the JIS standards key.Processing standardsa AWhen processing, verify thestandards for the tooth outerb Adiameter ("DO" in the diagram)Aand the hub outer diameter ("DH"in the diagram).DODHAlso, verify that the deflection onthe bottom of the tooth ("a" in theHubdiagram) and the deflection onTooth shapethe end surface of the tooth ("b" inthe diagram) are at or below thevalues shown below.2)3)When using machine specificationsDiameter oftooth-bottom cylinder 90 or less 90 but 190 190 but 850 850 but 1180 Greater than 1180Deflection at tooth bottom a 0.15 0.0008df0.08 0.76Face runout0.25 0.0009df0.08 1.14Sprocket weldingWhen welding a hub to A-type sprockets for use, thewelding can cause deformation or deflection of thetooth and surface, making it impossible to maintainproduct quality. As such, welding should be avoided.With the A-type strong series sprocket, welding canalso decrease the hardness of the sprocket, soagain, welding should be avoided.Processing on the hub outer diameterDo not perform any additional processing to theouter diameter of the hub. If processing needs tobe performed, please first consult with <strong>Tsubaki</strong>.New JIS key (Table 5)Parallel keyShaft hole diameterdShaft hole diameterdDesignated key diameter Keyway depthShaft Heightb h Shaft t1 Boss d+t26 8 22 1.2 d 1.08 10 33 1.8 d 1.410 12 44 2.5 d 1.812 17 55 3.0 d 2.317 22 66 3.5 d 2.820 25 77 4.0 d 3.022 30 87 4.0 d 3.330 38 108 5.0 d 3.338 44 128 5.0 d 3.344 50 149 5.5 d 3.850 55 1510 5.0 d 5.050 58 1610 6.0 d 4.358 65 1811 7.0 d 4.465 75 2012 7.5 d 4.975 85 2214 9.0 d 5.480 90 2416 8.0 d 8.085 95 2514 9.0 d 5.495 110 2816 10.0 d 6.4110 130 3218 11.0 d 7.4125 140 3522 11.0 d11.0130 150 3620 12.0 d 8.4140 160 3824 12.0 d12.0150 170 4022 13.0 d 9.4160 180 4226 13.0 d13.0170 200 4525 15.0 d10.4200 230 5028 17.0 d11.4230 260 5632 20.0 d12.4260 290 6332 20.0 d12.4290 330 7036 22.0 d14.4330 380 8040 25.0 d15.4380 440 9045 28.0 d17.4440 500 10050 31.0 d19.5Note: The nominal dimensions shown in parentheses are not defined ininternational standards.Old JIS key (Table 6)Parallel keyDesignated key diameter Keyway depthShaft Heightb t2 t1 Shaft t1 Boss dt210 or higher 13 Greater than 44 2.5 d 1.513 or lower 20 55 3.0 d 2.020 30 77 4.0 d 3.030 40 108 4.5 d 3.540 50 128 4.5 d 3.550 60 1510 5 d 560 70 1812 6 d 670 80 2013 7 d 680 95 2416 8 d 895 110 2818 9 d 9110 125 3220 10 d10125 140 3522 11 d11140 160 3824 12 d12160 180 4226 13 d13180 200 4528 14 d14200 224 5031.5 16 d15.5224 250 5635.5 18 d17.5Before Use For Safe Use Standard Roller Chains Lube-Free Roller Chains Heavy Duty Roller Chains Corrosion Resistant Roller Chains Specialty Roller Chains Accessories Selection Handling164
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