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Operating Instructions – Explosion-Proof AC Motors DR63/eDR63, DVE250/280
4
Installation tolerances
Mechanical Installation
4.4 Installation tolerances
4.5 Assembling the input elements
Input elements that are mounted on the motor shaft end, e.g. pinions, must be warmed
up prior to assembly in order to prevent damages to the encoder of stand-alone motors.
4.6 Turning the terminal box
4.6.1 Terminal box with terminal board and anti-twist frame
The following figure shows a terminal box with anti-twist frame:
Shaft end Flanges
Diameter tolerance according to EN 50347
• ISO j6 with Ø ≤ 28 mm
• ISO k6 with Ø ≥ 38 mm up to ≤ 48 mm
• ISO m6 at Ø ≥ 55 mm
• Center bore in accordance with DIN 332, shape
DR..
Centering shoulder tolerance in accordance with
EN 50347
• ISO j6 with Ø ≤ 250 mm
• ISO h6 with Ø ≥ 300 mm
K1M6 / K1M8 in with aluminum or gray cast
design
K1M12S made of gray cast
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