326 Каталог GEDORE 2014 Профессиональный слесарный инструмент и оборудование Стр.324

Каталог GEDORE 2014 Слесарный инструмент Стр. 324 0326 ENG Lab2u

GEDORE What makes for a good torque multiplier Light yet with the appliance remaining sturdy. The torque and repeatability accuracy is at + -3 %. Only in this way is dependable screw tightening work assured with reproducible accuracy. Both the torque settings and individual appliance components can be traced back. A factory test certificate ensures traceability of operations on the basis of ISO 9000. An individual factory test certificate is prepared for each and every torque multiplier and contains comprehensive information on readings deviations torque sensors and environmental influences. Particularly when unloosening seized screw connections minimised impacts on the tooth flanks appear in a low backlash planet gear. The greater the precision with which the components fit together the more stable the overall structure and the longer the service life. This precision can only be assured by a high in-house manufacturing proportion and consistent quality checks. An overload safety mechanism should be integrated at torques upwards of 2000 N-m. No damage occurs to the gear should it be overloaded. Tip Raise the level of your safety in the your daily work Choose a qualitatively good torque multiplier and adjust it precisely to the screw tightening situation involved. Read the operating instructions. Do you require a competent form of consultation Just turn to us -We would be glad to tender any advice. Selection criteria 1.Torque Select your torque multiplier on the basis of the maximum output torque. 2. Loading factor and frequency (load spectrum) It would be wrong to constantly operate the appliance at its maximum capacity -just as it would be for any machine or any car. This also holds good for the choice of the torque multiplier. Permanently operating a torque multiplier for screw-tightening applications at maximum torque may impact negatively on its service life. 3. Supporting situation Various supporting situations may be a determining factor in the selection of the torque multiplier. Support at a raised position The L-form reaction arm would be suitable should you want to attach the reaction arm to a point above the screwing-tightening level. A warning here in that the inputted bending forces result in a reduction of the maximum permitted torque Support at the level of the screw Our recommendation - should you want to attach the reaction arm at the screw-tightening level - is either for a Z-form reaction arm or the straight L-form with adjustable reaction square. 4. Anti-wind-up ratchet A minimum 180 torque wrench field of movement should be on hand. As such the recommendation is for an appliance complete with an anti-wind-up ratchet. In this way pre-tension in the appliance is maintained and does not need to be re-created with each lift. 3 Application case Screw connections - quantity per year 8000 screws a year are to be tightened at 4000 N-m. The following calculation needs to be carried out on the basis of the diagram to find the right appliance Torque x 100 % Loading 4000 N-m x 100 % 62 % Choose an appliance with a max. 6452 N-m torque. The DVV-60ZRS would be ideally suitable here. Plan for a sufficient reserve in unloosening the screw connection. The torque needed to unloosen a screw connection can be many times the tightening torque. 324