https://www.bernati.com/en/bvpc63-50fa180635/
BVPC Worm Gearbox Size 63/50 Gear Ratio 180 PAM 63B5 with integrated pre-stage and connection...
BERNATI BVPC Worm gearboxes, with integrated pre-stage and connection flange for IEC motors
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RICKA Flatwater, BVPC and Wilderness Postings: Re: Tuesday paddle - West River, Uxbridge