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NHL Series - Helical inline gearboxes

NHL Series - Helical inline gearboxes
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NHL Series - Helical inline gearboxes

Product catalog summary
General Features
The NHL-MNHL-MNHLC series of coaxial gearboxes by SITI S.p.A. features a modern design with sizes ranging from 25 to 70, maintaining original fixing measurements and shaft height. New sizes MNHL 90 and MNHL 100 offer torques up to 8000 Nm and 12000 Nm respectively.
Manufacturing Features
These gearboxes are designed using advanced software for precise dimensioning and strength calculations, emphasizing modularity, flexibility, and versatility. They are available in various configurations, including solid input shafts and PAM arranged geared motors. The gearboxes are noted for high quality, silent operation, and efficiency, suitable for high-speed and intermittent operations. They are available in two-stage (ratios 2:1 to 50:1) and three-stage (ratios up to 466:1) reductions.
Technical Specifications
The catalogue provides detailed technical data, including thermal power, painting, available versions, gearbox weight, installable motor sizes, unit designation, mounting positions, lubrication requirements, recommended lubricants, reduction ratios, and allowable external loads. Guidance on gearbox selection and dimensions for various models is also included.
Specifications
The NHL series gearboxes are available in three versions: with a solid input shaft, as a compact geared motor (except sizes 90 and 100), and PAM arranged geared motor. Compact versions are available up to size 132.
Materials and Construction
Housings are made from high toughness cast iron, except size 20 which is aluminum. Gears are constructed from case-hardening steel, treated for high resistance to stress and wear. Output shafts are made from hardening and tempering steel.
Performance and Efficiency
Dynamic efficiencies are high, with 0.97 for two-stage and 0.955 for three-stage reductions. Gearboxes can handle high external loads and operate under severe conditions while maintaining satisfactory lifetimes.
Thermal Power
Thermal power ratings are provided for continuous service at 20°C with a 4-pole motor. Different ratings apply for 2-pole motors.
Painting
All gearboxes, except size 20, are painted with RAL 5010 type rustication powder.
Mounting Positions
Various mounting positions are available, with specific lubrication required for certain positions to ensure normal service life.
Lubrication
Sizes 20 to 35 are supplied with ISO VG 220 mineral oil. Larger sizes are supplied without lubricant, requiring user-supplied oil based on mounting position.
Weight and Motor Compatibility
Weights for each gearbox size are specified, along with compatible motor sizes and configurations.
Lubrication Specifications
Helical gearboxes of sizes 20, 25, 30, and 35 are supplied with mineral oil ISO VG 220. Larger sizes are supplied without lubrication but are equipped for oil lubrication. Users must fill the units with oil according to the mounting position, checking the correct level through the level plug.
Special Mounting Positions
All NHL series gearboxes come with support feet. For specific requirements, except for size 20, an output flange can be fitted.
Recommended Lubricants
For sizes from NHL 40 upwards, SITI recommends synthetic oils for lifetime lubrication, including Shell Tivela Oil SC 320 and IP Telium Oil VSF 320. Mineral oils are also recommended for non-lifetime lubrication.
Reduction Ratios
The document provides detailed tables of reduction ratios for various NHL gearbox models, indicating the input and output speeds and torque values.
Allowable Loads
The maximum allowable external radial and axial loads are specified, applicable to the center line of the shaft projection with a service factor of sf = 1. For different ratios, loads can be determined by interpolation.
Gearbox Selection
To select the appropriate gearbox, necessary data includes input and output angular speeds and the required torque. The gearbox must satisfy the condition M2 > M x sf, where M2 is the maximum allowable torque, M is the actual application torque, and sf is the service factor.
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Catalog excerpts

NHL Series - Helical inline gearboxes-1

SPA SOCIET ITALIANA TRASMISSIONI INDUSTRIALI . >

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NHL Series - Helical inline gearboxes-3

SITI S.p.A. La ringrazia per la fiducia accordatae 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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NHL Series - Helical inline gearboxes-5

PREMESSAIl presente catalogo relativo ai INTRODUCTIONThis catalogue refers to the VORWORTDieser Katalog bezieht sich auf die von SITIS.p.A. hergestellten riduttoricoassiali serie NHL-MNHL-MNHLC NHL-MNHL- , costruitidalla SITI S.p.A. La nuova serie di riduttori coassiali si distingue per la forma del corpo pi moderna. I riduttori dalla grandezza 25 alla 70 sono stati infatti ristilizzati, mantenendo inalterate le mi- sure di fissaggio e l蹒altezza di albero. La gamma si arricchita di due nuove grandez- ze: -MNHL 90 con coppie fino a 8000 Nm. -MNHL 100 con coppie fino a 12000 Nm. MNHLC series of...

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MANUFACTURING FEATURES? Per ogni grandezza sono disponibili le se-guenti versioni: ?Versione con albero maschio in entrata. ?Versione predisposta per attacco motore(P.A.M.).?Versione motorizzata compatta ad ecce-zione delle grandezze 90 e 100.? CARATTERISTICHE COSTRUTTIVE? KONSTRUKTIONSMERKMALE? Progettazione La costruzione Le prestazioni sono state massimizzate ha puntato su una modularitestesa al massimo grado, cos come sulla flessibilitଠ e sulla versatilit di impiego ed in- stallazione. La realizzazione sotto la forma di gruppi funzionali compatti, facilmente assemblabili nelle diverse versioni...

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NHL Series - Helical inline gearboxes-7

?Excellent Gli alberi lenti sono costruiti in acciaio dabonifica 42 Cr Mo 4 o materiali di simili pro- priet.? ? Le carcasse Materiali e trattamenti termici gli ingranaggi sono costruite in ghisa G 25secondo UNI 5007, salvo NHL 20 in allu- minio pressofuso.?Tutti i nuovi riduttori offrono la possibilit diaccettare elevati sono costruiti in ac-ciaio da cementazione (20 Mn Cr 5 o ma- teriali di equivalente resistenza e temprabilitࠠ), e sottoposti a cementazione, tempra e distensione per elevata resisten- za alle sollecitazioni statiche e dinamiche e allusura.? ottimizzatial fine del raggiungimento...

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VERSIONI DISPONIBILII riduttori della serie NHL vengono costruiti intre versioni: -versione con albero in entrata maschio; -versione motorizzata compatta ad eccezio-ne delle grandezze 90 e 100;-versione predisposta per attacco motoreB5 (PAM).La versione motorizzata compatta viene realiz-zata, al momento, soltanto fino alla grandezza 132: pertanto, nelle pagine relative alle motorizzazioni disponibili, si deve intendere che tutte le motorizzazioni indicate per ogni gran- dezza e rapporto di riduzione sono possibili nella versione PAM B5, ma sono disponibili come compatti solo fino ai motori di...

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NHL Series - Helical inline gearboxes-11

COMPACT GEARED MOTOR/ KOMPAKTE GETRIEBEMOTOREN TipoGrandezzaRapporto di riduzioneDati motore TypeSizeRatio > Motor data TypGroesseUebersetzungMotorangaben 20/2 See tables > 50/2 Siehe Tabellen 50/360/260/3 70/2 70/3 MNHLC 30/232.35:1kW 1.1 - 4p - 220/380V - 50 HzMNHLC 40/363.23:1F/160kW 1.5 - 4p - 220/380V - 50 Hz MOTORIDUTTORE COMPATTO/ (*)Only for œF version(**)Outer dia. of output flange in mm (***)PowerNumber of poles Voltage FrequencyExamples: (*)Solo per versione ԓF(**)Diametro esterno flangia uscita in mm (***)PotenzaPolaritԠ Voltaggio FrequenzaEsempi: (*)Nur fuer FӔ Ausfuehrung(**)Aussendurchmesser...

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MOUNTING POSITIONSThe following table shows the mounting po-sitions of NHL helical gearboxes, both in the foot-mounting version (B3, B6, B7, B8, V5 and V6), and in the flange-mounting version (B5, V1 , V3).The drawings highlight even the position ofloading plug (in white), level plug (in white- black) and unloading plug (black).We 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 is re- quired, without which the normal service life of the gearbox will not be guaranteed....

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POSIZIONI DI MONTAGGIO SPECIALITutti i riduttori serie NHL sono provvisti di piedidi appoggio. Per esigenze particolari, ad esclusione della grandezza 20, sempre possibile montare una flangia in uscita, come appare nella figura se- guente. SPECIAL MOUNTING POSITIONSAll NHL series gearboxes are fitted with sup-port feet. For specific requirements, apart from size 20, a flange in output can be fitted, as shown in the following figure. SONDEREINBAULAGENAlle Getriebe der Baureihe NHL sind mit Sttz-f輼en ausgestattet. Mit Ausnahme der Bau-gr߶e 20 kann f߼r Sonderanforderungen einAbtriebsflansch gem...

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Quantit di olio in funzione della posizione Oil quantity according to the mounting lmenge in Abh֤ngigkeit von der Ein- di montaggio (litri) position (litres) baulage (Liter) (*)These quantities are only guidelines,therefore users should check the correct level through the oil level plug in the proper mounting position (see page 11). (*)Le quantit evidenziate sono indicative;lutilizzatore dovrҠ controlare il corretto li- vello di lubrificante tramite lindicatore po- sto sul riduttore, nella posizione di montag- gio desiderata (vedi pag. 11). (*)Es handelt sich bei diesen Angaben nur umRichtwerte...

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LUBRIFICANTI CONSIGLIATIPer le grandezze dalla NHL 40 compresa in su,la SITI consiglia i seguenti lubrificanti:? RECOMMENDED LUBRICANTSSITI recommends the following lubricants forsizes from NHL 40 (included) upwards:? EMPFOHLENE SCHMIERMITTELFr die Baugr춟e ab NHL 40 und hher emp-fiehlt SITI folgende Schmiermittel:? OLI SINTETICILubrificazione a vita SYNTHETIC OILSLifetime lubrication SYNTETIK-LELebensdauerschmierung MARCA / MAKE / HERSTELLER TIPO DI OLIO / TYPE OF OIL / 斖LSORTE ? SHELLTIVELA OIL SC 320? IPTELIUM OIL VSF 320? KLBERSYNTHESO D 320 EP? FINAGIRAN S 320 ? AMBIENT TEMPERATURE / UMGEBUNGSTEMPERATUR...

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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.