Benzlers Screw Jacks
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with you at every turn with you at every turn Benzlers Screw Jacks

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 shaft helical geared motors & reducers Series G Helical parallel shaft & bevel helical right angle drive gear units Series H Large...

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 ATEX zone, 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) enforced in all EC member states. Compliance is compulsory for designers, manufacturers or...

SERIES BD CONTENTS PAGE Introduction ___________________________________________________________________ 2 Standard and variant executions___________________________________________________ 3 Selection guide ________________________________________________________________ Technical data: BDK - BDKL ______________________________________________________ 43 Power ratings BDK - BDKL _______________________________________________________ Universal joint shaft _____________________________________________________________ Bevel gears...

We are a company in the transmission field with comprehensive experience in manufacturing and marketing MECHANICAL WORM GEAR SCREW JACKS, and complete screw jack systems. With this catalogue we have made it easy to select a screw jack or screw jack system suitable for your application. You can also consult our Technical Sales and Engineering department. They will help you with computer calculations and suggestions, for both standard and special applications. With our global subsidiaries and good sales network, we are able to give the optimum solution on a local basis. Please refer to the...

STANDARD & VARIANT EXECUTIONS Standard Executions BD Screw jack with Translating Lifting Screw BDL Screw jack with Lifting nut Screw jack with PVC Bellows Screw jack with Motor Flange Screw jack with Stop nut SM BDK Ball Screw jack with Translating Lifting Screw BDKL Ball Screw jack with Lifting nut

VARIANT & SPECIAL EXECUTIONS Variant Executions LR Locked against rotation LRK Locked against rotation with key LS Limit switches- Tele mecanique MLS Magnetic Limit switches Screwjack with Reinforced Projection Tube Screw jack with Worm gear motor

Contact: Tele: I |bd EUbdl Qbdk | |bdkl Questionnaire screw jacks: Type of screw jack: Number of jacks Please attach drawing of installation if possible. Axial load on lifting screw Dynamic load per screw jack - normal Dynamic load per screw jack - max Static load per screw jack - max Vibrations Shock loads Side loads If yes, define | Compression Tension Compression and Tension Load case Environment Ambient temperature: Placement Humidity: Environment Others, specify Operating cycle Cycles/hour: Hours/day: Days/year: Lifting screw Stroke length: Lifting speed: Mounting position of...

Standard accessories according to catalogue Safety nut SHM, state safety load direction: | |Yes | | No | ~ Locked against rotation: □ LR (square tube) □ LRK (key) Anti backlash ABL: | |Yes Limit switch, state how many: | | Yes Stainless jack body: | lYes Stainless worm screw: | | Yes Stainless end fittings: | | Yes Other accessories for gears Transport conservation (anti-rust) | | Yes | | No Use order template for ATEX, B 74004-1 Motor data: Standard Motor type Voltage Motor flange: Brake Protection class □ No □ Right...

SERIES BD SCREW JACK Fork End (Pos. 12 - Y) Rod end Pos. 12 - Y) Clevis End (Pos. 12 - 7) Top Plate (Pos. 12 - 2) Lifting screw - Standard single start (pos. 10 - L/H) - Double start (pos. 10 - Q/R) - Left hand threaded (pos. 10 - Y) - Locked against rotation with key (pos. 18 - 2) Bellows (pos. 19) - PVC (B) - Hypalon (Y) - Special (Y) Base Unit - Housing (pos. 9) - Anti-backlash (pos. 18 - 1) - Safety Nut (pos. 18 - 3) Shaft Protection (Standard) Bellows (pos. 19) - Steel (S) - Stainl. steel (Y) Hand Wheel Joint Shaft Motor Flange (pos. 21) - IEC (A to V) - NEMA /Special (Y) Coupling...

PRODUCT CODIFICATION - SCREW JACKS Jack codes Pos. 1,2, 3, 4 Type BD-- Screw Jack with Translating screw BDL- Screw Jack with Travelling nut BDK-- Ball screw jack with translating screw BDKL Ball scerw jack with travelling nut Pos. 5, 6, 7 Size 66- Sizes 27 to 200 (BD/BDL) Sizes 27 to 66 (BDK/BDKL) Pos. 8 Revision Version 2 For Sizes 27 to 86 Pos. 9 Screw Jack Execution code <- F Free Input Shaft A Free Input shaft+Stainless Gear Housing (HR) B Free Input shaft+Stainless Worm Screw (PR) C Free Input shaft+ Complete Stainless Steel construction (PH)...

SERIES BD DETERMINATION OF TYPE Position 11: Lifting screw Direction Rotating screw with lifting nut Translating screw Rotating screw with lifting nut (inverted) Translating screw (inverted) Note: For types BD and BDK spindle must be held to prevent rotation. For types BDL and BDKL lifting nut must be held to prevent rotation.

Symbols used: F = Force (N) (1 tonne = 10 000 N) v = Lifting speed (mm/min) s = Pitch of lifting screw (mm) n = Required input speed (rpm) i = Ratio of worm gear set ED% =Intermittence (%) Pd = Running power of screw jack (kW) Ps = Starting power of screw jack (kW) PED = Thermal power (kW) PMnom = Nominal motor power (kW) PMst = Starting power of motor (kW) PMax = Max allowable input power of screw jack (kW) r|d = Running efficiency of screw jack ns = Starting efficiency of screw jack To calculate a screw jack you must at least know the force (F) to be moved and the lifting speed...