{"id":1139,"date":"2026-04-24T02:18:26","date_gmt":"2026-04-24T02:18:26","guid":{"rendered":"https:\/\/worm-and-worm-wheel.com\/?post_type=product&p=1139"},"modified":"2026-04-24T02:21:27","modified_gmt":"2026-04-24T02:21:27","slug":"duplex-worm-gear-set-dual-lead-zero-backlash-worm-drive","status":"publish","type":"product","link":"https:\/\/worm-and-worm-wheel.com\/cs\/produkt\/duplex-worm-gear-set-dual-lead-zero-backlash-worm-drive\/","title":{"rendered":"Dvojit\u00fd \u0161nekov\u00fd p\u0159evod | Dvouvodi\u010dov\u00fd \u0161nekov\u00fd p\u0159evod s nulovou v\u016fl\u00ed"},"content":{"rendered":"
\n
\n

Duplexn\u00ed \u0161nekov\u00fd p\u0159evod \u2013 co ho odli\u0161uje<\/h2>\n

Duplex \u0161nekov\u00fd p\u0159evod<\/strong> \u2013 naz\u00fdvan\u00fd tak\u00e9 dvouvodi\u010dov\u00fd \u0161nekov\u00fd z\u00e1vit \u2013 je specializovan\u00e1 varianta, u kter\u00e9 jsou dva boky stejn\u00e9ho z\u00e1vitu \u0161neku vy\u0159\u00edznuty s m\u00edrn\u011b odli\u0161n\u00fdmi moduly a m\u00edrn\u011b odli\u0161n\u00fdmi pom\u011bry pr\u016fm\u011bru. Efekt je v d\u00edln\u011b nen\u00e1padn\u00fd, ale v praxi rozhoduj\u00edc\u00ed: tlou\u0161\u0165ka zubu se od jednoho konce \u0161neku k druh\u00e9mu stabiln\u011b zv\u011bt\u0161uje, zat\u00edmco mezera mezi sousedn\u00edmi z\u00e1vity se zmen\u0161uje stejnou rychlost\u00ed. Axi\u00e1ln\u00edm posunem \u0161neku uvnit\u0159 p\u0159evodovky se siln\u011bj\u0161\u00ed nebo ten\u010d\u00ed \u010d\u00e1st z\u00e1vitu posouv\u00e1 do z\u00e1b\u011bru, co\u017e znamen\u00e1, \u017ee v\u016fli lze p\u0159i mont\u00e1\u017ei nastavit na libovolnou c\u00edlovou hodnotu \u2013 a pozd\u011bji v pr\u016fb\u011bhu \u017eivotnosti znovu nastavit, jak se pohon opot\u0159ebov\u00e1v\u00e1.<\/p>\n

\"Sada<\/p>\n

On the wheel side the picture mirrors the shaft. Different modules on the two flanks produce different addendum modification coefficients and different rolling-circle diameters, so the front and rear tooth profiles of the wheel are not identical, even though the tooth thickness and tooth gap stay constant around the wheel’s circumference. The outcome is a drive that delivers single-digit-micrometre backlash when needed, and holds it through reversing service that would quickly wear out a conventional worm set. Korean machine-tool builders, rotary-indexing specialists and stamping-press manufacturers are the most frequent buyers.<\/p>\n<\/section>\n

\n

Technick\u00e9 specifikace<\/h2>\n

The values below reflect the standard catalogue envelope for duplex sets. All geometry is cut to customer drawing \u2014 duplex worms are almost never stock items because the lead-difference value itself is an application-specific parameter. Values marked “typical range” reflect industry-standard practice where the customer has not yet specified a tighter target.<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Parametr<\/th>\nSpecifikace<\/th>\n<\/tr>\n<\/thead>\n
Typ \u010derva<\/strong><\/td>\nDvou\u017eilov\u00fd (r\u016fzn\u00e9 moduly na lev\u00e9m a prav\u00e9m k\u0159\u00eddle)<\/td>\n<\/tr>\n
Rozsah zp\u011btn\u00e9 vazby<\/strong><\/td>\n\u00b1 0,045 mm na referen\u010dn\u00edm zubu (nastaviteln\u00e9 sm\u011brem dol\u016f od v\u011bt\u0161\u00edch hodnot)<\/td>\n<\/tr>\n
Rozsah modul\u016f<\/strong><\/td>\nM1 \u2013 M10 (typick\u00fd rozsah)<\/td>\n<\/tr>\n
Typick\u00fd rozd\u00edl ve veden\u00ed<\/strong><\/td>\n0,05 \u2013 0,20 mm na ot\u00e1\u010dku (typick\u00fd rozsah, p\u0159izp\u016fsobeno dle v\u00fdkresu)<\/td>\n<\/tr>\n
Materi\u00e1l \u010derv\u016f<\/strong><\/td>\n20CrMnTi cementa\u010dn\u011b kalen\u00e9 (HRC 58\u201362) nebo 40Cr pr\u016fb\u011b\u017en\u011b kalen\u00e9<\/td>\n<\/tr>\n
Materi\u00e1l kola<\/strong><\/td>\nC\u00ednov\u00fd bronz (CuSn10), hlinito-\u017eelezn\u00fd bronz (CuAl10Fe3)<\/td>\n<\/tr>\n
Povrchov\u00e1 \u00faprava zubu<\/strong><\/td>\nMlet\u00fd materi\u00e1l po tepeln\u00e9m zpracov\u00e1n\u00ed (povinn\u00e9 pro duplex)<\/td>\n<\/tr>\n
P\u0159esn\u00fd stupe\u0148<\/strong><\/td>\nDIN 5 \u2013 DIN 6 (standard pro duplexn\u00ed sady)<\/td>\n<\/tr>\n
Referen\u010dn\u00ed zna\u010den\u00ed<\/strong><\/td>\nV-dr\u00e1\u017eka (60\u00b0, hloubka 0,3 mm) na \u0161pi\u010dce referen\u010dn\u00edho zubu<\/td>\n<\/tr>\n
Orientace sestavy<\/strong><\/td>\nZna\u010dka \u0161ipky vyra\u017een\u00e1 na \u0161neku i kole<\/td>\n<\/tr>\n
Dodac\u00ed lh\u016fta<\/strong><\/td>\n25 \u2013 35 pracovn\u00edch dn\u016f (u DIN 5 d\u00e9le)<\/td>\n<\/tr>\n
Prim\u00e1rn\u00ed aplikace<\/strong><\/td>\nOto\u010dn\u00e9 a nakl\u00e1p\u011bc\u00ed stoly, CNC fr\u00e9zky, lisy, d\u011blic\u00ed pohony<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/section>\n
\n

Jak vlastn\u011b funguje nastaven\u00ed v\u016fle<\/h2>\n

V\u016fle u konven\u010dn\u00edho pohonu vznik\u00e1 z v\u016fle mezi boky zub\u016f, kter\u00e9 s n\u00edm souvisej\u00ed, na ose rozte\u010de. U duplexn\u00ed sady ji\u017e tato v\u016fle nen\u00ed pod\u00e9l h\u0159\u00eddele konstantn\u00ed \u2013 m\u011bn\u00ed se line\u00e1rn\u011b od jednoho konce k druh\u00e9mu, proto\u017ee se line\u00e1rn\u011b m\u011bn\u00ed i samotn\u00e1 tlou\u0161\u0165ka zubu. Posunut\u00ed h\u0159\u00eddele o 1 mm axi\u00e1ln\u011b m\u016f\u017ee u typick\u00e9 sady M4 posunout v\u016fli o 20\u201340 \u00b5m, v z\u00e1vislosti na rozd\u00edlu stoup\u00e1n\u00ed specifikovan\u00e9m p\u0159i n\u00e1vrhu.<\/p>\n

Se\u0159\u00edzen\u00ed p\u0159i mont\u00e1\u017ei prob\u00edh\u00e1 ve \u010dty\u0159ech kroc\u00edch. Nejprve se h\u0159\u00eddel upevn\u00ed na pouzdro pomoc\u00ed t\u011bsnic\u00ed podlo\u017eky nebo sady distan\u010dn\u00edch podlo\u017eek, kter\u00e1 umo\u017e\u0148uje axi\u00e1ln\u00ed posunut\u00ed \u00b12 mm. Za druh\u00e9 se kolo ot\u00e1\u010d\u00ed ru\u010dn\u011b, zat\u00edmco mont\u00e1\u017en\u00ed technik zkou\u0161\u00ed v\u016fli na v\u00fdstupn\u00ed h\u0159\u00eddeli. Za t\u0159et\u00ed, h\u0159\u00eddel se axi\u00e1ln\u011b posouv\u00e1 sm\u011brem ke konci s tlust\u0161\u00edm zubem, dokud se nedos\u00e1hne po\u017eadovan\u00e9 v\u016fle. Za \u010dtvrt\u00e9, sada t\u011bsnic\u00edch podlo\u017eek se dokon\u010d\u00ed a pojistn\u00e1 matice se ut\u00e1hne. Op\u011btovn\u00e9 se\u0159\u00edzen\u00ed o n\u011bkolik let pozd\u011bji, po opot\u0159eben\u00ed pohonu, se \u0159\u00edd\u00ed stejn\u00fdmi kroky, ale obvykle vy\u017eaduje dodate\u010dn\u00fd posun pouze o 0,5\u20131,5 mm.<\/p>\n

\"Dvojit\u00e1<\/p>\n<\/section>\n

\n

Duplexn\u00ed vs. jin\u00e9 metody kontroly v\u016fle<\/h2>\n

Existuje n\u011bkolik metod na \u00farovni d\u00edlny, jak sn\u00ed\u017eit v\u016fli \u0161nekov\u00fdch p\u0159evod\u016f. Ka\u017ed\u00e1 z nich funguje, ale ka\u017ed\u00e1 s sebou nese nev\u00fdhodu, kter\u00e9 se duplexn\u00ed metoda vyh\u00fdb\u00e1. Pochopen\u00ed t\u011bchto kompromis\u016f je d\u016fvodem, pro\u010d konstrukt\u00e9\u0159i, kte\u0159\u00ed specifikuj\u00ed p\u0159esn\u00e9 d\u011bli\u010dky, ochotn\u011b plat\u00ed za duplexn\u00ed p\u0159\u00edplatek.<\/p>\n

\n\n\n\n\n\n\n\n\n\n
Metoda<\/th>\nJak to funguje<\/th>\nHlavn\u00ed nev\u00fdhoda<\/th>\n<\/tr>\n<\/thead>\n
Excentrick\u00e9 ot\u00e1\u010den\u00ed n\u00e1boje<\/td>\nOt\u00e1\u010dejte n\u00e1bojem, kter\u00fd dr\u017e\u00ed \u0161nek a kolo, a m\u011b\u0148te tak osovou vzd\u00e1lenost<\/td>\nPosune kontaktn\u00ed z\u00f3nu zub\u016f, deformuje kontaktn\u00ed vzor, \u200b\u200bsni\u017euje nosnost<\/td>\n<\/tr>\n
Axi\u00e1ln\u00ed posun ku\u017eelov\u00e9ho \u0161neku<\/td>\nPohybujte ku\u017eelov\u00fdm \u0161nekem pod\u00e9l jeho osy do odpov\u00eddaj\u00edc\u00edho kola<\/td>\nNaru\u0161uje geometricky spr\u00e1vn\u00e9 zapojen\u00ed, vysok\u00e9 opot\u0159eben\u00ed p\u0159i rozb\u011bhu<\/td>\n<\/tr>\n
D\u011blen\u00fd \u0161nek (Ott\u016fv syst\u00e9m)<\/td>\nDv\u011b poloviny \u0161neku oto\u010den\u00e9 nebo posunut\u00e9 v\u016f\u010di sob\u011b navz\u00e1jem<\/td>\nSlo\u017eit\u00e1 mont\u00e1\u017e, riziko nespr\u00e1vn\u00e9ho vyrovn\u00e1n\u00ed, sn\u00ed\u017een\u00e1 \u00fa\u010dinnost<\/td>\n<\/tr>\n
D\u011blen\u00e9 kolo (dvoukotou\u010dov\u00e9)<\/td>\nDv\u011b poloviny kola se ot\u00e1\u010dej\u00ed bl\u00edzko sebe, aby se p\u0159edepnul \u0161nek<\/td>\nVy\u0161\u0161\u00ed t\u0159en\u00ed, zah\u0159\u00edv\u00e1n\u00ed a opot\u0159eben\u00ed v m\u00edst\u011b p\u0159edpjat\u00e9ho kontaktu<\/td>\n<\/tr>\n
Duplex (dvojit\u00fd svod)<\/strong><\/td>\nAxi\u00e1ln\u00edm posunem dvouvodi\u010dov\u00e9ho \u0161neku zvol\u00edte tlou\u0161\u0165ku zubu v z\u00e1b\u011bru<\/td>\nVy\u0161\u0161\u00ed v\u00fdrobn\u00ed n\u00e1klady; \u017e\u00e1dn\u00e9 geometrick\u00e9 ztr\u00e1ty ani opot\u0159eben\u00ed<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Spodn\u00ed \u0159ada je jedin\u00e1, kter\u00e1 po nastaven\u00ed zachov\u00e1v\u00e1 geometricky p\u0159esn\u00e9 zapojen\u00ed. Kontaktn\u00ed plocha, nosnost a \u00fa\u010dinnost z\u016fst\u00e1vaj\u00ed nedot\u010deny \u2013 pohon funguje p\u0159esn\u011b stejn\u011b jako p\u0159ed nastaven\u00edm, jen s jinou hodnotou v\u016fle. Tato vlastnost je d\u016fvodem, pro\u010d duplexn\u00ed sady dominuj\u00ed na trhu s p\u0159esn\u00fdm indexov\u00e1n\u00edm, a to i p\u0159es to, \u017ee stoj\u00ed o 40\u201360 % v\u00edce ne\u017e ekvivalentn\u00ed standardn\u00ed \u0161nekov\u00e9 sady.<\/p>\n<\/section>\n

\n

Kontrola orientace sestavy a referen\u010dn\u00edho zubu<\/h2>\n

Proto\u017ee \u0161nek a kolo maj\u00ed na obou stran\u00e1ch odli\u0161n\u00e9 profily tlou\u0161\u0165ky, nen\u00ed duplexn\u00ed sada symetrick\u00e1 \u2013 m\u00e1 spr\u00e1vnou a nespr\u00e1vnou orientaci. Ignorov\u00e1n\u00ed t\u00e9to skute\u010dnosti b\u011bhem instalace zp\u016fsob\u00ed, \u017ee osov\u00e1 vzd\u00e1lenost bude v\u011bt\u0161\u00ed ne\u017e konstruk\u010dn\u00ed hodnota a mont\u00e1\u017e se st\u00e1v\u00e1 obt\u00ed\u017enou nebo nemo\u017enou. Dv\u011b p\u0159edletov\u00e9 kontroly pokr\u00fdvaj\u00ed b\u011b\u017en\u00e9 chyby.<\/p>\n

Za\u0161krtn\u011bte jednu mo\u017enost \u2013 Orienta\u010dn\u00ed \u0161ipky<\/h3>\n

\u25b6<\/span> Both the shaft and the wheel are stamped with a small arrow at the manufacturer’s assembly mark. When fitting the pair into the housing, rotate the wheel until the arrow faces the front, then feed the shaft into engagement so that its arrow points the same direction. If the arrows point opposite, the thicker tooth is meeting the thinner tooth of the wheel and the drive will bind before it reaches the design centre distance.<\/p>\n

Kontrola dva \u2013 Referen\u010dn\u00ed zub V-dr\u00e1\u017eka<\/h3>\n

\u25b6<\/span> The tip of the duplex shaft carries a 60-degree V-groove cut 0.3 mm deep \u2014 this is the reference tooth. When the reference tooth sits exactly aligned with the rotational centre of the wheel and the centre distance is set to the drawing value “a”, the backlash sits at the design target (typically \u00b1 0.045 mm for our catalogue frames). From that starting point, axial shift is used to tune backlash up or down as the application demands.<\/p>\n

\"Sestava<\/p>\n<\/section>\n

\n

Typick\u00e9 aplikace pro duplexn\u00ed \u0161nekov\u00e9 p\u0159evody<\/h2>\n

Duplexn\u00ed sady si vyd\u011bl\u00e1vaj\u00ed dodate\u010dn\u00e9 n\u00e1klady v pohonech, kde p\u0159esnost reverzace mus\u00ed vydr\u017eet des\u00edtky tis\u00edc cykl\u016f bez ru\u010dn\u00edho podkl\u00e1d\u00e1n\u00ed podlo\u017eek. Korejsk\u00fd pr\u016fmysl je pou\u017e\u00edv\u00e1 v n\u011bkolika r\u016fzn\u00fdch aplika\u010dn\u00edch oblastech.<\/p>\n