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Chain sprocket or sprocket-wheel is a profiled wheel with teeth, or cogs, that mesh with a chain, track or other perforated or indented material. The name ‘sprocket’ applies generally to any wheel upon which radial projections engage a chain passing over it. It is distinguished from a gear in that sprockets are never meshed together directly, and differs from a pulley in that sprockets have teeth and pulleys are smooth.

Vipuli hutumiwa katika baiskeli, pikipiki, magari, magari yanayofuatiliwa, na mashine zingine ama kupitisha mwendo wa kuzunguka kati ya shafts mbili ambapo gia hazifai au kupeana mwendo wa laini kwa wimbo, mkanda nk. Labda aina ya kawaida ya sprocket inaweza kupatikana katika baiskeli, ambayo shimoni la kanyagio hubeba gurudumu kubwa la gurudumu, ambalo huendesha mnyororo, ambayo, hiyo, huendesha kijiko kidogo kwenye mhimili wa gurudumu la nyuma. Magari ya mapema pia yalisukumwa kwa kasi na utaratibu wa mnyororo na mnyororo, mazoezi ambayo yalinakiliwa sana kutoka kwa baiskeli.

Mtengenezaji wa Sprocket, sprocket za mnyororo, gurudumu na tawi, dereva wa gari, gurudumu la gurudumu, taper lock sprocket, gia sprocket, sprocket isiyofanya kazi, sprocket ya pikipiki na chuma cha pua, inaweza kubadilishana na kuchukua nafasi ya sprocket size ya sprin, sprt za jt size, alifanya mnyororo wa saizi sprocket na kadhalika.