H4-SV20A experience in many industries and in the acquisit Helical gear unit H4

Flender/Flender Gear Units/Helical gear unit H4

Fig. 8: Gear unit features on gear units type .. 1 3 1 4 3 5 4 5 5 9 1 7 2 2 Fig. 9: Gear unit features on gear units type .. 1 Housing 2 Lifting eye3 Cover 4 Cover 5 Shaft seal6 Oil dipstick7 Housing supply and exhaust ventilation8 Oil draining screw9 Rating plate 1 Gear unit fastening1 Inspection and/or assembly cover 1 Alignment surface 1 Alignment thread1 Oil filling point1 Fastening for torque arm1 Oil sight glass For detailed illustration of the gear unit and the position of the add-on parts, please refer to the drawings in the gear unit documentation. 2 / 9BA 5 en 0/2.4 Toothed components The externally toothed components of the gear unit are case-hardened. The helical gear teeth are ground. The high quality of the teeth leads to significant noise reduction and ensures safe and reliable running. The gears are connected with the shafts by interference fits and parallel keyways or shrink fits. These types of joints transmit the torques generated with adequate reliability. 5.5 Lubrication 5.5.1 Splash lubrication Unless otherwise agreed in the order, the teeth and bearings are adequately splash-lubricated with oil. The gear unit thus requires very little maintenance. 5.6 Shaft bearings All shafts are fitted in rolling bearings. 5.7 Shaft seal Radial shaft sealing rings or Taconite seals on the shaft outlets prevent oil from escaping the gear unit or dirt from penetrating the gear unit. 5.7.1 Radial shaft sealing rings Radial shaft sealing rings are the standard type of seal. They are preferably fitted with an additional dust lip to protect the actual sealing lip from external contamination. NOTICE Property damage Destruction of the radial shaft sealing ring caused by high dust concentrations is possible. Radial shaft sealing ring is not to be used in high concentrations of dust. Fig. 1: Radial shaft sealing ring 2 / 9BA 5 en 0/2.7.2 Taconite seal Taconite seals have been specially developed for use in dusty environment. The penetration of dust is prevent