>> P.50
Table 30 Clearance between grooved shaft and housing bore unit: mmShaft dia.ClearanceIncl. 50 mmOver 50 mm0.25〜0.40.5〜13 LabyrinthAlthough it is a little difficult to make, the labyrinth is very effective in preventing oil leakage especially at high speeds. At low speeds, lling the labyrinth with grease is effective in preventing the entry of dust. In Fig. 17, it is necessary to split the housing or cover plate into two. In Fig. 18, it is easy to assemble, and if combined with an oil seal, it improves the sealing effect.Table 31 shows the labyrinth clearances generally used.Fig. 152 FlingerThe oil flinger is a disk attached to the shaft which throws off oil due to the centrifugal force of rotation and thus prevents oil leakage and the entry of foreign particles. Fig. 16 (1) shows an example in which the inger is located inside the housing, mainly to prevent oil leakage. Since it sucks in dust and dirt, it should be used in a dust free environment. Fig. 16 (2) shows an example in which the inger is located outside the housing, and is used in combination with another sealing device, to prevent entry of foreign particles.(1)(2)Fig. 16A47(1)(2)Fig. 17Fig. 18Table 31 Labyrinth clearance unit: mmShaft dia.Incl. 50 mmOver 50 mmClearanceRadial directionAxial direction0.25〜0.40.5〜11〜23〜5
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