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deva.tex

®

maintenance-free

5

Fits

Recommanded fitting and tolerance ranges

Fit • deva.tex

®

is pressed into the housing with aninterference fit by means of screw press, hydraulic press or press mandrel. Tapping or driving into place is not permissible.•The standard housing bore is H7. •Average roughness of housing:R

Standard Precision Housing bore H7 H7 Bearing bore (after installation) D11
1) H8
1) Shaft h8 h7d7, e7
a

= 3.2 µm.•The housing should be provided with a 20 - 40° chamferfor easier installation.•Higher precision standards (IT7 or better) can beachieved by machining the bearing bore after installation. For this purpose,

1) Exception for diameter ≤ 40 mm : Quality IT9 Table 5.1 – Fits and tolerances

deva.tex

®

can beproduced with a machining allowance.• deva.tex

®

precision bearings with inside diametersof 150 mm and above can also be installed by supercooling in liquid nitrogen.

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Design

Fits

1a)1b)2) 1a)Sliding plate for radial segment1b)Sliding plate screwed in place2)Axial segment

Design Figure 6.2 – deva.tex
® guide vane bearing, water turbine D8, E8 Figure 6.1 – deva.tex
® radial and axial segments

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