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CMU-U Series - Combined wormgearboxes

CMU-U Series - Combined wormgearboxes
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CMU-U Series - Combined wormgearboxes

Product catalog summary
General Features
The U-MU series of worm gearboxes by SITI S.p.A. are introduced with a focus on their die-cast aluminium housing, which is designed for easy cleaning in challenging environments. These gearboxes offer versatile installation options due to universal mounting and multiple connecting flanges.
Design Features
The gearboxes feature smooth, silent operation due to their worm and wormwheel profiles. The aluminium housing eliminates the need for painting. Taper roller bearings are standard on input shafts from size U75, with optional installation on output shafts. Output flanges allow for universal or modular assembly.
Reversibility and Irreversibility
The reversibility or irreversibility of a worm gearbox is influenced by efficiency, which depends on parameters like helix angle, machining precision, surface finish, and sliding speed.
Technical Data
Details include lubrication requirements, mounting positions, and performance tables for different motor configurations.
Product Variants
Includes the U-MU INOX Series with performance data for motors with 2, 4, and 6 poles, new primary reduction units, and combined gearboxes.
Accessories and Spare Parts
Options include single and double output shafts, torque arms, protective covers, and spare parts.
Specifications and Design
The gearboxes feature "ZI" involute toothing profiles, with efficiency influenced by the helix angle. Static and dynamic irreversibility are defined by specific efficiency thresholds.
Lubrication
All U-MU series wormgearboxes are pre-lubricated with synthetic oil, enhancing performance and eliminating maintenance needs. The oil used is SHELL TIVELA SC 320.
Performance Tables
Expanded for easy reading, these tables differentiate between gearboxes with and without motors, providing maximum performance rates and service factors.
Operational Recommendations
For input speeds of 2800 RPM, caution is advised due to potential temperature and vibration issues. Usage is recommended for applications with a low service factor and minimal intermittency.
Specifications
Outlines maximum allowable external radial and axial loads, with a formula for load correction if not applied at the center-line. Taper roller bearings can be fitted for higher loads.
New Reduction Units
New units P63, P71, P80, and P90 are made of die-cast aluminum with B14 flanges, minimizing space requirements.
Terms and Conditions of Sale
The guarantee lasts one year from the invoice date, covering manufacturing faults. Shipment risks are borne by the buyer, and prices are subject to change. Complaints must be in writing, and returns require prior authorization.
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Catalog excerpts

CMU-U Series - Combined wormgearboxes-1

SPA SOCIET ITALIANA TRASMISSIONI INDUSTRIALI . >

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CMU-U Series - Combined wormgearboxes-3

SITI S.p.A. La ringrazia per la fiducia accordata e Le ricorda che il Suo riduttore il risultato di un lavoro di miglioramento del prodotto che i nostri tecnici perseguono continuamente, gra- zie ad una ricerca costante nel settore.La rete di Assistenza a Sua disposizione peraiutarLa a risolvere dubbi che potessero sorge- re nella lettura di questa pubblicazione.E訒 vietata la riproduzione, la memorizzazione olalterazione, anche parziale, di questa pubbli- cazione, senza una autorizzazione scritta da parte della SITI S.p.A. We, at SITI S.p.A., would like to thank you for the confidence shown in...

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CMU-U Series - Combined wormgearboxes-5

PREMESSAIl presente catalogo relativo ai INTRODUCTIONSITI S.p.A. proudly introduces our series ofsquare VORWORTDieser Katalog bezieht sich auf riduttori a vitesenza fine serie U-MU Schnecken-untersetzungsgetriebe Typ U-MU U-MU , con corpo a forma qua-drata, costruiti dalla SITI S.p.A. I riduttori della serie sono caratterizzatidai corpi in lega di alluminio dal design moder- no, appositamente studiate per facilitare le ope- razioni di pulizia anche negli ambiente pi osti- li. Il fissaggio universale e le molteplici flange di collegamento, rendono questi riduttori partico- larmente versatili e...

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CMU-U Series - Combined wormgearboxes-6

DESIGN FEATURES1 - TOOTHING PROFILESMating profiles of worm and wormwheel inbronze are ZIӔ (profile with involute sec- tion); This gives rise to a gradual, constant and shockless matching in the rolling of mating profile throught all the possible running con- dition. Wormgearbox running is much more silent and free of vibrations.2 - ALUMINIUM PRESSURE DIE CASTEDHOUSINGPressure die casted aluminium housing ofvery modern design are used. The excellent surface finishing makes paint- ing unnecessary, and therefore it is omitted. 3 - TAPER ROLLER BEARINGS ON THE IN-PUT SHAFTFrom U75 onwards, tape...

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CMU-U Series - Combined wormgearboxes-8

Irreversibilit dinamica Dynamic irreversibility Dynamische Selbsthemmung la condizione piȹ difficile da ottenere. Essa si verifica quando, al cessare delle cause che mantengono in rotazione la vite, cessa istan- taneamente il moto di rotazione dellalbero len- to. LҒirreversibilit dinamica quella condizione in cui ਨ necessario arrestare e trattenere il carico anche senza lintervento di un freno. Detto RD il rendimento dinamico, la condizione teorica perchҨ si verifichi lirreversibilitҠ dina- mica la seguente: RD < 0.5La condizione inversa, cio la reversibilit訠 dina-mica, ha luogo quando RD > 0.5...

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CMU-U Series - Combined wormgearboxes-9

TECHNICAL DATA TABLEThe table here below gives the typical pa-rameters of worm/wormwheel pairs. The fol- lowing data are given one after the other. a)The number of starts of the worm (z TABELLA DATI TECNICINella tabella sono riportati i parametri caratteri-stici dei riduttori a vite senza fine. Vengono rappresentati in ordine a)il numero di principi della vite (z 1 ) dal qualesi desume il numero di denti della corona (z 1 )which even the number of teeth of the wormwheel (z a )Windungen der Schnecke (z 1 ), aus denendie Anzahl der Schneckenradzhne ent-nommen werden kann, wozu man die Zahlder Zhne...

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CMU-U Series - Combined wormgearboxes-10

PROPRIET TIPICHE OLIOSHELL TIVELA SC 320:Massa volumica (kg/dmc)1.052Viscosit cinematica a 40 C337 cSt Punto di scorrimento-42 аC Indice di viscosit 242 Punto di infiammabilit (c.o.c)290 ࠰C Prova FZG supera lo stadio> 12NOTANon pu essere mescolato con oli minerali ed incompatibile con le vernici nitrocellulosiche e le guarnizioni di gomma naturale. LUBRICATIONAll the wormgearboxes series U-MU are sup-plied already pre-lubricated by SITI, and are missing the oil plugs, since the lubricant used is ⨓lifetime, in other words it does not require any maintenance during the wormgearboxes life. Synthetic...

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CMU-U Series - Combined wormgearboxes-12

RIDUTT ORI E MOT ORIDUTT ORI A WORMGEARBOX AND WORM- SCHNECKENUNTERSETZUNGS- VITE SENZA FINE SERIE U-MU GEARED MOT ORS SERIES U-MU GETRIEBE UND -GETRIEBEMOT O- REN TYP U-MU > DESIGNAZIONE CONFIGURATION TYPENBEZEICHNUNGEN Tipo Grandezza Versione Pos. di mont. Type Size Version Mount. pos. Other indicat. Typ Grsse Ausfhrung iAltre indicaz. Einbaulage Weitere Angaben F63U 10* B3 > 57,510152025 304050 6070 80100 B3V5 B8V6B7 B6 U > 405063 7590110 PAM MU (PAM) 19/200 > **F**FBRFBM***FBML Poli - Poles kW 1 Polig VoltHz 0.37 4 220/38050 MU > (con motore) (with motor) (mit Motor) *Il rapporto 5 漨 disponibile...

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POSIZIONI DI MONTAGGIOSi consiglia di prestare la massima attenzionealla posizione di montaggio in cui si trover a lavorare il riduttore. Per molte posizioni, infatti, prevista un਒apposita lubrificazione del riduttore e dei cuscinetti, senza la quale non garantita la normale durata del riduttore stesso. In man- canza di indicazioni specifiche il riduttore verr fornito idoneo per il montaggio standard B3. MOUNTING POSITIONWe recommend paying the utmost attentionto the gearbox installation and operating position. For many positions, in fact, a specific lubri- cation of the gearbox and its bearings...

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CMU-U Series - Combined wormgearboxes-14

HOW TO READ THE PERFORMANCE TA-BLESThe tables of performance of singlewormgearboxes, have been windened, in order to make them suitable to an easy read- ing, even in case of special applications, or applications out of the standard.First of all, a differentiation has been cariedout between the performance of gearboxes without motor and gearboxes complete with motor.In case of gearboxes complete with motor, ithas been taken account of the possible PAM- arrangements of each gearbox size and each ratio, and the max. input power allowed at each input speed n IMPOSTAZIONE E LETTURA DELLE TABEL-LE...

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In fact, when input speed is as high as 2800RPM, a few potential problems, like the tem- perature achieved inside the gearbox, start of vibrations or noise, trend to grow.As a general rule, we recommend the use ofwormgearboxes at 2800 RPM input speeds (2 poles motors) only in applications having a relatively low service factor (1.25 max.)and a very low degree of intermittency.The use of n Quando la velocit di ingresso pari a 2800 giri/min, accennano a esaltarsi alcuni problemi, come la temperatura raggiunta all਒interno del riduttore in condizioni operative e la tendenza allinnesco di vibrazioni...

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.