Zobate jermenice
Zobate jermenice prenašajo vrtenje prek ustreznega zobatega jermena. Število zob določa prestavno razmerje med motorjem in gnano gredjo. Za CNC-stroje, 3D-tiskalnike in druge sisteme gibanja izbirajte po profilu in številu zob, širini jermena ter izvrtini za gred.
Kako izbrati zobato jermenico
Profil in korak zob
Obe jermenici se morata ujemati z jermenom. Profili s podobnimi merami niso nujno zamenljivi.
Število zob
Pri isti pogonski jermenici večja gnana jermenica zniža izhodne vrtljaje, manjša pa jih zviša. Preverite dejansko razmerje.
Širina jermena in prirobnice
Preverite delovno širino in potrebno bočno vodenje jermena.
Pritrditev na gred
Preverite premer izvrtine, mere pesta in način pritrditve glede na gred in razpoložljivi prostor.
Izračun prestavnega razmerja iz vrtljajev motorja
Pri sinhronem pogonu z dvema jermenicama so izhodni vrtljaji enaki vrtljajem motorja, pomnoženim s številom zob pogonske jermenice in deljenim s številom zob gnane. Pogonska jermenica z 20 zobmi in gnana s 60 spremeni 1.500 vrt/min v 500 vrt/min: redukcija 3:1.
Enako razmerje lahko dosežete z več pari. Pred naročilom preverite specifikacije, združljivost jermena, razdaljo med osema, dolžino jermena ter proizvajalčeve omejitve obremenitve in vrtljajev.
Oglejte si zobate jermene in kalkulator dolžine →Filters
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