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Rack and pinion, Shaft coupling, Worm gear, Helical gear, Gear
Text version of the page
| KHK Technical information | |||||||||||||||||||||||||||||||||
| © The table below indicates the tolerance on the total length of KHK stock spur gears. Please refer to this data when designing gear boxes or other components. ■ Overall Length Tolerance for Spur and Helical Gears | |||||||||||||||||||||||||||||||||
| © Verify that the two shafts are parallel. Incorrect assembly will lead to uneven teeth contact which will cause noise and wear. (After assembly, the gear mesh can be checked by applying a contact pattern compound and rotating the gears.) ■ Test example: Abrasion occurred on SSG3-30 due to poor edge contact (only 30% with proper contact). | |||||||||||||||||||||||||||||||||
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| In this example, the gear oil used is equivalent to the JIS gear oil category 2, No. 3 The design conditions were load torque at 278 rpm, 42.5 kg/m (12 kW), 1.5 times the allowable bending strength, and 3 times the allowable surface durability torque. The pitting occurred on the poor tooth contact area after 60 hours | |||||||||||||||||||||||||||||||||
| [Note ) Following products are excluded from this table: DS Injection Molded Spur Gears, LS Sintered Metal Spur Gears, DSL Fairloc Hub Spur Gears, SUSL Fairloc Hub Spur Gears © A gear may slip on the shaft or move axially while in motion if it is not firmly fastened to the shaft. Step shafts, collars and set screws are some of the ways to secure the gears. Keyways are generally used as the method of engaging the gears with the axis. There is also a method of the setting with a MACHALOCK, Posi-Lock, and Shupanring, etc. which are parts for engaging the hole and the axis. | |||||||||||||||||||||||||||||||||
| Poor tooth contact and pitting of continuous operation. | |||||||||||||||||||||||||||||||||
| Application Examples | |||||||||||||||||||||||||||||||||