RD, XA, RC series
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" w " MOTION CONTROL SINCE 1955 technology made in Italy

Technology Made in Italy Since 19 55 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 distributors an easier job to set up required products in few minutes.

Gearboxes Series RD Product description Multipurpose housing Foot & Foot/Flange Mountings One housing for 2- & 3-stages Housing & Covers Input Aluminium die cast (5 sizes) NEMA and IEC Cast iron (2 sizes) motor adapters and Universal elastic coupling Gearing Oil seals 20MnCr5 alloy steel Nitrile Butadiene Rubber -NBR as standard; Case hardened Profile ground or shaved Viton and Silicon on request Bearings Output Ball or roller types Solid shafts according to sizes imperial and metric and technical requirements Lubrication Synthetic long-life oil Grade ISO VG 320 No oil plugs In-house...

Gearboxes Series RD Product description GENERAL SPECIFICATIONS Range 7 sizes 28 ratios in 2 and 3 stages Sizing According to ISO6336/DIN3990. 15,000 hours average lifetime with service factor SF1 Housing, Covers Pressure die cast aluminium AlSi12Cu2Fe up to size 4 and cast iron G25 from size 5. Toothed parts Steel 20MnCr5 case hardened. Tooth profile ground or shaved Shafts & Keys Steel 39NiCrMo3 Shafts h6 - Bores E8 Bearings Ball- or roller-types according to sizes and technical requirements Oilseals Type NB - nitrile-butadiene with additional anti-dust lip Lubricant Synthetic long-life...

Gearboxes Series RD Modular system -4-

Gearboxes Series RD Modular system -5-

Gearboxes Series RD Elastic coupling “G” description Reducer half-coupling • Material: Alloy 20MnCr5 • Input shaft built-in • Two bearing set • Unchanged casing dimensions Spider • External tooth connection • Material: Thermoplastic Elastomer - Elastollan ® TPU - Polyurethane TPE - Polyester - Hytrel ® • Hardness - TPU 98 Shore A - TPE 72 Shore D • Temperature - TPU -20/+75° C (-4 / +167° F) - TPE -30/+100° (-22 / +212° C F) Motor half-coupling • Material: - Aluminium die cast (G3, G5, G6) - Steel 36SMnPb14 (GS8) - Steel C43 on demand (GS3, Gs5, GS6) • Dynamic balancing • Fitting: - Clamp...

Gearboxes Series RD Symbols D [mm] PCD of transmission element k(t) Fr [N] Application radial load Fr1 [N] Catalogue radial load (input) Fr2 [N] Catalogue radial load (output) Fr2b(x) [N] Permissible radial load at position “X” on output shaft. Based on bearing Fr2s(x) [N] Permissible radial same as Fr2b(x). Based on shaft bending and torsional stress. FS in M2 M (app) Nominal reduction ratio ir FS = Service factor Actual reduction ratio J1 [kgm2] Moment of inertia of the gearbox at gearbox input shaft J2 [kgm2] Moment of inertia of the application Jm [kgm2] Moment of inertia of the motor...

Gearboxes Series RD External loads OUTPUT RADIAL LOADS Radial (overhung) loads have to be checked with the rating factor given in the RD gearbox selection tables. The k(t) rating factor will vary according to the transmission element fitted on the gearbox output shaft according to the below table. Application radial load Fr = 2000 ∗ M 2 ∗ k(t) D k(t) Transmission element 1,15 1,40 1,25 1,00 2,50 1,25 Gear - Tooth No. < 17 Chain sprocket - Tooth No. < 13 Chain sprocket - Tooth No. < 20 Chain sprocket - Tooth No. > 20 “V” belt pulley Timing belt pulley D a Catalogue radial load at shaft...

Gearboxes Series RD Service factors SERVICE FACTOR of the motor The specifications of various duty types are defined by the Standard CEI EN 60034-1 / IEC34-1. S1 – Continuous duty The specifications of various duty types are defined by the Standard CEI EN 60034-1 / IEC34-1 fs =1.0 N c t = Operation time = Load = Temperature S3 – Periodic intermittent duty Operation according to cycle (C) including steady load time (N) and rest time (R). Starts/stops do not affect temperature. The reference cycle (C) is up to a total of 10 minutes. Intermittence ratio is calculated as follows: N 60% (N+R)...

Gearboxes Series RD Mounting positions B3 Foot mounting B5 Flange mounting - 14 -

Gearboxes Series RD Designation GEARBOX DESIGNATION F R 32 /B3 H 31.5 IEC71 -B14 AU30 DFU200 Output flange diametre ø ... mm Output shaft diametre ø ... mm B5, B14 = Electric motor format Electric motor frame Reduction ratio H, V = Gearbox mounting position B3, B5, B3/B5 = Gearbox format Gearbox size Gearbox type M = Geared motor F = Gearbox with input flange IEC S = Gearbox without input flange IEC … = (nihl) Gearbox with input free shaft MOTOR DESIGNATION MT 0.37 kW 71 B 4 B14 230/400/50 IP55 F X4 Terminal box position Class F (std) = Insulation class IP55 (std) = Protection class Voltage...

Gearboxes Series RD Electronic catalogue Modularity and flexibility have been leading the design of Varvel products since the years 2000: this way, the gearboxkit concept was carried out allowing anyone to assemble the unit in few minutes with standard tooling. This feature provides the highest flexibility to Varvel’s distributors and resellers who - thanks to a limited kit selection are able to immediately configure the required product. ® VARSIZE selection programme - available from our site www.varvel.com - allows a friendly sizing of Varvel product range. 3D-models and 2D-drawings A...

Gearboxes Series RD Component parts TWO GEAR STAGE REDUCER A - IEC motor flange B - 2-stage input cover & T3 pinion C - Housing & T4, T5, T6 gears D - Output flange THREE GEAR STAGE REDUCER A - IEC motor flange B - 3-stage input cover & T1, T2, T3 gears C - Housing & T4, T5, T6 gears D - Output flange - 47 -

Gearboxes Series RD 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 its...