Ch 6 chains.docx - Ch 6 chains Calculations N −n(� � 2/4 p i 2 C Chain length = L = N n 2C � 2 If driver has ½ teeth as driven… Driver RPM = double

Ch 6 chains.docx - Ch 6 chains Calculations N −n(� � 2/4...

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Ch 6 chains Calculations: Chain length = L = ( N n ) ( ¿¿ 2 / 4 ( pi 2 ) C ) 2 C + ( N + n ) 2 + ¿ If driver has ½ teeth as driven… Driver RPM = double driven RPM Driver torque = half torque of driven Intro notes: Flexible in only one plane No slippage Carry very heavy loads Good for harsh envoirnment Don’t deteroriate Use sprocket w/ odd number of teeth reduces sprocket wear, so a tooth only has to engage once every 2 revs Slack side = right side of chain near small driver sprocket or left side of small when driver is bigger **adv and dis of chains when compared to belt and gear drives** Chains can be used for short or long distances, gears need an idler Chains only can use parallel shafts Very high ef Chains are not used for precise motion Like belts, chains need to be properly maintained, but can be lubed Type of chains Roller chains Conveyor chains Silent chains Steel chains Roller chains: Alternate links made of inner and outer link plates Turn with the teeth of sprockets, resulting in rolling friction Pitch of chain = linear distance between axes of adj rollers Standardized and manufactured on basis of PITCH
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a) double pitch roller chain Extended pitch chain
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