Series BS Worm Gear
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Series BS Compact Worm Gear Technical Up to - 4kW / 315 Nm Worm Gearbox CBS-2.00GB1211

PRODUCTS IN THE RANGE Serving an entire spectrum of mechanical drive applications from food, energy, mining and metal; to automotive, aerospace and marine propulsion, we are here to make a positive difference to the supply of drive solutions. Series A Worm Gear units and geared motors in single & double reduction types Series BD Screwjack worm gear unit Series BS Worm gear unit Series C Right angle drive helical worm geared motors & reducers Series F Parallel angle helical bevel helical geared motors & reducers Series G Helical parallel shaft & bevel helical right angle drive gear units...

ATEX Compliance Assured Total compliance with the ATEX Directive safeguarding the use of industrial equipment in potentially explosive atmospheres is assured for users of our geared products. Certification is available for standard gearboxes and geared motors with badging displaying the CE Mark and the Ex mark, name and location of the manufacturer, designation of series or type, serial number, year of manufacture, Ex symbol and equipment group/category. ATEX directive 94/9/EC (also known as ATEX 95 or ATEX 100A) and the CE Marking Directive are enforced in all EC member states. Compliance...

SERIES BS CONTENTS Technical information ____________________________________________________________ 2 Selection of worm gears and worm geared motors _____________________________________ 3 Mounting positions ______________________________________________________________ 8 Worm Geared Motors Power ratings - Output speeds ____________________________________________________ 9 - 18 Dimensions ___________________________________________________________________ 19 - 30 Worm Gears Power ratings - Output speeds ____________________________________________________ 31 - 37 Dimensions...

SERIES BS THE PROGRAMME BS 40-71 BS 40-71 BS 40-71 Single input shaft Hollow shaft Single input shaft BS 40-71 BS 40-71 BS 40-71 BENZLERS BENZLERS Output shaft Motoflange Hollow shaft BS 40-71 BS 40-71 BS 40-71 Feet Feet Horizontal BS 40-71 BS 40-71 BS 40-71 BENZLERS Bolt the gear to a wall or foundation without feet or flange Output flange BS 40-71 Output flange BS 40-71 BENZLERS Double input shaft BS 40-71 BENZLERS Double worm gear 1 Double worm gear

SERIES BS TECHNICAL INFORMATION Motorflanges Benzler worm gears BS 40-71 have a symmetrical gear-housing manufactured in aluminium. BS 88 and 112 have a gearhousing of cast-iron. The motorflanges up to IEC-size 112 are made of aluminium and are available in B5 and B14, larger motorflanges are made of cast-iron and available in B5. A finished bore shaft coupling is always delivered together with the motorflange. The worm wheel is made of centrifugal cast tinbronze and the worm screw is case-hardened and ground. All motor connections are according to IEC-standard and for BS 40-112 with...

SERIES BS SELECTION OF GEARS AND GEARMOTORS Power and torque ratings for gears on page 40-47 apply to service factor 1.0. Service factor for geared motors can be found after the output speeds. Service factor 1.0 is valid for continous operation 8 hours/ day without shocks and with 10-200 starts per hour. The inertia of the driven machine is less than 20% of the electric motor. Occasional shock loads may not exceed 1.8 times the gear rating at service factor 1.0. 10. or conditions other than above described, for F instance extreme environments, high inertia systems or other, please contact...

SERIES BS SELECTION OF GEARS AND GEARMOTORS Service factors Table 1. Service factor fb Daily operations in hours 4 hours 8 hours 16 hours 24 hours Starts per hour <10 10-200 >200 <10 10-200 >200 <10 10-200 >200 <10 10-200 >200 I 0.8 0.9 1.0 0.9 1.0 1.1 1.1 1.2 1.3 1.3 1.4 1.5 Ia 1.1 1.2 1.3 1.1 1.3 1.5 1.3 1.5 1.6 1.4 1.6 1.8 II 1.3 1.4 1.6 1.3 1.6 1.8 1.4 1.7 1.9 1.5 1.8 2.0 III 1.5 1.6 1.8 1.6 1.8 2.0 1.7 1.9 2.1 1.8 2.0 2.2 Load classification Table 2. Ambient temperature factor ft For other ambient temperatures then 20° C, always multiply the thermal rating with the following factors....

SERIES BS SELECTION OF GEARS AND GEARMOTORS Overhung load Pe = Permissible overhung load (N) fb = Service factor (tables page 7) fe = 1.10 for sprockets = 1.30 for gearwheels = 1.50 for pulleys Dmin T2b = Pe x 9 550 n2 = Output speed (rpm) Fr2 T2b = Torque required (Nm) = Power kW n2 If a sprocket, gear wheel or pulley is mounted on a shaft, a load check must be made. The overhung load in middle of the shaft may not exceed values shown in tables below. For calculation of minimum permissible diameter the following formula should be used. Dmin 2000 x T2b x fe x fb mm = Fr2 = Minimum...

SERIES BS QUESTIONAIRE To specify a drive precisely certain data are essential. The most important questions are listed in the table below. If you do not have the required data available in this form, we advice you to use a technical handbook or other suitable documentation. Should you have any question, please do not hesitate to contact us, Benzlers specialists will be pleased to assist you. Load designation Output power (kW): Pe at nmax at nmin Motor Enclosure IP Output speed (RPM): nemax nemin Output torque (Nm): Te at nmax at nmin Overhung load (N): Fr2e at output shaft at input shaft...

SERIES BS DIMENSIONS Execution with torque arm LN 20° LS LS BL TF 20° 20° BL TF BO LN BO HT øSB øSB HT 20° Torque arm shall be mounted for tension (see arrows). LS AK 20° AS LS AS AT ØS 20° HT AK ØS HT AT LS Size AK AS AT BO HT BL LN min/max S SB TF Kgs - . - - 16 16 8 8 3/8” 3/8” - - 4 5 5 5 - - 4.0 5.8 7.5 10.7 40.0 57 BS 40 BS 50 BS 63 BS 71 BS 88 BS 112 - - - - 47 60 - - - - 18 18 - - - - - 5 9 9 11 11 - - 76 88 106 120 190 240 36.5 70 39 85 41 103 50.7 107.5 - - 46 165/245 165/245 190/290 190/290 460/600 480/600

SERIES BS WORM GEAR WITH ENVIRONMENTAL CLASSIFICATION With BS (size 40-71) classified acc to environmental class we are able to recommend the gears for installation in ambient conditions where normally only materials in stainless steel are accepted. The gears are classified acc to environ-mental class M2-M3, Swedish standard stBK-N4. 48