Catalogs >
VARVEL >
RG series

RG series
20Pages

Catalog excerpts

MOTION CONTROL SINCE 1955 technology made in Italy

Technology Made in Italy Since 1955 Varvel has been making speed reducers and variators for light industry applications. Reliable partner in power transmission equipment offers also customized solutions always according to a socially responsible company values. Modularity and flexibility lead Varvel products by a unique kit form, common to all gearbox series. This feature allows distri- butors an easier job to set up required products in few minutes.

Open the catalog to page 2

RG LOW BACKLASH PLANETARY GEARBOXES Coupling to brushless, DC and IEC/NEMA standard motors

Open the catalog to page 3

Planetary gearboxes RG Description One-piece body of hardened and tempered steel and modular design of input and output flanges Gears one-piece broached ring gear sun and planet gears of alloy steel, case-hardened and skiving finished Input Servo, DC, IEC and NEMA motor adapters with clamping clutch Bearings 2Z ball types on input shaft 2RS ball types on output shaft needle types between planet gear and planet shaft Output flanges fitted on output bearing spigot Planet carrier Temperature Bearings -40 / +100 °C -40 / +212 °F Ambient -15 / +40 °C +5 / +104 °F overhanging with high stiffness...

Open the catalog to page 4

Planetary gearboxes RG Description GENERAL SPECIFICATIONS Ct [Nm / arcrmin] Torsional rigidity Fr2 [N] Catalogue radial load (output) Fa2 [N] Catalogue axial load (output) FS Shock factor i J1 [kgcm2] Reduction ratio (finite values) Moment of inertia at gearbox input shaft T2acc [Nm] Gearbox max. output acceleration torque (S5 operation - max. 1000 cycles per hour) T2ISO [Nm] Gearbox nominal output torque according to ISO 6336 (S1 continuous operation) T2max [Nm] Gearbox emergency output torque (max. 1000 times in gearbox life) n1 [min-1] Input speed n1max [min-1] Max. input speed P [kg]...

Open the catalog to page 5

Planetary gearboxes RG Descrizione TECHNICAL SPECIFICATIONS Size, RG... 051 052 071 072 091 092 121 122 One-stage ratios [i] 3, 4, 5, 7, 9, 10 Two-stage ratios [i] 12, 15, 16, 20, 25, 28, 30, 35, 40, 45, 50, 63, 70, 81, 90, 100 Output torque [Nm] 6 18 45 110 Acceleration torque [Nm] 12 35 90 220 Max. torque [Nm] 26 75 190 480 Radial load (OHL) [N] 650 1450 2400 4600 Axial load [N] 700 1550 1900 4000 Average lifetime [h] 20,000 20,000 20,000 20,000 Noise level [dB A] < 68 < 70 < 72 < 74 Nominal input speed [min-1] 4000 3700 3400 2600 Max. input speed [min-1] 6000 6000 6000 4800 Torsional...

Open the catalog to page 6

Planetary gearboxes RG Duty cycle - Operation Duty cycle The correct investigation of actual duty cycle is the basic rule in planetary gearbox selection. An operative and basic duty cycle can be pictured as follows: : Torque Nm T2 max T2 mid Time T2 mid Speed rpm n2 max n2 mid Time t1 t2 t3 t4 ttot = Cycle where: n2 max [ rpm ] n2 mid [ rpm] t1 [s] [s] t2 t3 [s] [s] t4 T2 max [ Nm ] T2 mid [ Nm ] T2 dec [ Nm ] - Max. speed - Average speed - Acceleration time - Operation time - Deceleration time - Pause time - Max. acceleration torque - Operation torque - Deceleration torque Operation The...

Open the catalog to page 7

Gearbox selection is made according to the following formulas for Continuous or Intermittent operation. T2nom [Nm] = Gearbox nominal torque Ti nom [Nm] = Motor nominal torque T2 iso [Nm] = Gearbox nominal torque according to ISO ri2nom [rpm] = Output nominal speed n2eqv [rpm] = Output average speed n2eqv [rpm] = Cycle equivalent speed t1...t4 [ s ] = Acceleration, operation, deceleration, pause times Reduction ratio Shock factor (see graph) Gearbox efficiency Cycle number per hour Equivalent torque, resultant by individual torques of duty cycle Cycle speed Cycle times Shock factor is a...

Open the catalog to page 8

Planetary gearboxes RG Motor fitting Step 1 - Remove the protection cap. Step 2 - Apply anti-loosening paste (Loctite 243 or similar) on screw thread. - Tighten the screws according to table torque values. - Rotate the gearbox input bush until tightening screw head is aligned with the access hole of the flange. - Screw resistance class: recommended 12.9 - Loosen the tightening screw. - Correctly align the motor shaft to the gearbox. - Fit the motor vertically. Screw diameter M4 Screw class 12.9 [Nm] 4.9 RG 071/072 VC 5.20 9.7 RG 091/092 VC 6.30 16 RG 121/122 VC 8.40 77 12.9 Step 4 - Reset...

Open the catalog to page 9

Planetary gearboxes RG Abstract of OPERATION AND MAINTENANCE INSTRUCTIONS (complete manual on www.varvel.com) Variable speed and reduction gearboxes are not part of the field of application of the Machinery Directive, art.1(2), and they must not be put into service until the machinery into which they are to be incorporated, has been declared in conformity with the provision of art. 4(2), annex II(B) of Machinery Directives 98/37/ CEE/22.6.98 and for Italy only, of DL 459/24.7.96. Installation Check if the unit to be installed, is properly selected to perform the required function and that...

Open the catalog to page 18

A socially responsible company To the scope of intensifying our commitment to society, Varvel since 2004 started an ongoing support programme with three non-profit institutions: UNICEF (United Nations Children's Fund), MSF (Medicins sans Fronteres) and ANT (National Cancer Association). Environmental respect and protection are also part of Varvel's values and this is why varvel certified in 2001 its Environmental System to standard UNI EN ISO 14001.

Open the catalog to page 19