Worm gear units
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Worm Gear Units Technical Catalogue Never a problem always a ...

Worm gear units Versions The service factor (f.s.) depends on the operating conditions the reduction unit is subjected to. The parameters that need to be taken into consideration to select the most adequate service factor correctly comprise: • type of load of the operated machine : A - B - C • length of daily operating time: hours/day (∆) • start-up frequency: starts/hour (*) TYPE OF LOAD: A - uniform B - moderate shocks C - heavy shocks fa = Je/Jm • Je (kgm2) moment of reduced external inertia at the drive-shaft • Jm (kgm2) moment of inertia of motor If fa > 10 call our Technical Service....

Worm gear units Critical Applications The performance given in the catalogue correspond to mounting position B3 or similar, ie. when the first stage is not entirely immersed in oil. For other mounting positions and/or particular input speeds, refer to the tables that highlight different critical situations for each size of reduction unit. Applications with especially high inertia. Applications with high dynamic strain on the case of the reduction unit. In places with T° under -5°C or over 40°C. Use in environments pressures other than atmospheric pressure. Avoid applications where even...

Worm gear units Installation and lubrication To install the reduction unit it is necessary to note the following recommendations: Check the correct level of the lubricant through the indicator, if there is one. The mounting on the machine must be stable to avoid any vibration. Starting must take place gradually, without immediately applying the maximum load. Check the correct direction of rotation of the reduction unit output shaft before fitting the unit to the machine. In the case of particularly lengthy periods of storage (4/6 months), if the oil seal is not immersed in the lubricant...

Worm gear units The radial load on the shaft is calculated with the following formula: Fre (N) D (mm) Diameter of the transmission member mounted on the shaft Fr (N) chain wheel Resulting radial load gear pinion flat pulley When the resulting radial load is not applied on the centre line of the shaft it is necessary to calculate the effective load with the following formula: Value of the maximum permitted radial load (see relative tables) Every effort has been taken to ensure that the data listed in this catalogue is correct. Challenge accepts no liability for any inaccuracies or damage...

Worm gear units ■ CHALLENGE Possible motor flanges * Low profile key supplied by Challenge AH dimensions in millimètres unless otherwise stated. Every effort has been taken to ensure that the data listed in this catalogue is correct. Challenge accepts no liability for any inaccuracies or damage caused.

Worm gear units PC & CMRV Combinations PC 063 .CMRV Every effort has been taken to ensure that the data listed in this catalogue is correct. Challenge accepts no liability for any inaccuracies or damage caused. All dimensions in millimetres unless otherwise stated.

Worm gear units Efficiency Efficiency Efficiency is a parameter which has a major influence on the sizing of certain applications, and basically depends on gear pair design elements. The mesh data table on page 9 shows dynamic efficiency (n1=1400 rev/min) and static efficiency values. Remember that these values are only achieved after the unit has been run in. Dynamic Irreversibility Dynamic irreversibility is achieved when the output shaft stops instantly when drive is no longer transmitted through the worm shaft. This condition requires a dynamic efficiency of nd < 0.5. Static...

Worm gear units Mesh data

Worm gear units Materials and design features (PC) Materials The PC construction is modular and therefore it can be supplied as a separate unit to be mounted on any type of fitted geared motor (PAM). In this connection, the various possibilities of flange/output shafts. Case in aluminium alloy. Gears in case hardened, hardened, tempered steel 20MnCr5 (UNI7846) accurately ground on the involute. Fitting the pre-stage helical module on the main reduction unit is easily done as for any motor of type B14. The pre-stage unit cannot be used by itself, but only coupled with another reduction unit....

CHALLENGES* Worm gear units Mounting positions "U" version is related to sizes from CMRV 025-075 and CRV 030-063. For thèse sizes it is not necessary to specify mounting position. Unless specified otherwise, the standard positions are B3. For positions not envisaged, it is necessary to email ourTechnical Every effort has been taken to ensure that the data listed in this catalogue is correct. Challenge accepts no liability for any inaccuracies or damage caused. AN dimensions in millimètres unless otherwise stated.

Worm gear units Execution of double reduction CMRV-CMRV / CRV-CMRV AS1 The position of the 1st reducer with respect to the 2nd gear reducer depend on the version. Unless otherwise specified at the time of order, combination groups are supplied in version BS2. The specified mounting position refers to the 2nd gear reducer. See page 11 for the possible mounting positions. Unless specified otherwise, the reduction unit is supplied with the flange in pos. D referred to position B3. In the case of specific requirements, when ordering, specify the position of the terminal box as shown in the...

Worm gear units CMRV Performance input n1 = 1400 rpm i Geared Motors Size Gear Units Motor Frame Every effort has been taken to ensure that the data listed in this catalogue is correct. Challenge accepts no liability for any inaccuracies or damage caused. All dimensions in millimetres unless otherwise stated.

Worm gear units CMRV Performance input n1 = 1400 rpm i Geared Motors Size Gear Units Motor Frame All dimensions in millimetres unless otherwise stated. Every effort has been taken to ensure that the data listed in this catalogue is correct. Challenge accepts no liability for any inaccuracies or damage caused.