M3 threaded holes spaced 31mm apart from center to center.
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In practice, when the motor is driven at its rated current, surface temperature can reach around 60.6°C under normal operation, which is well within the insulation class (typically Class B or higher) of these motors. The acceptable winding temperature under continuous operation is typically up to 80°C, but this can be confirmed by a product’s insulation rating. M3 threaded holes spaced 31mm apart from center to center