Ronstan Ball Bearing, Series 40 - Double, Becket, Swivel Shackle Head 1391 The Z Box Upgrade option

The Z Box Upgrade option is only applicable to Star Gazer Systems

Suit either 1" or 7/8" Shafts

Intrusion: 85mm

(The paddle wheel is no longer required)

EarlyHolden 6 & 8 Cyl

Ronstan Ball Bearing, Series 40 - Double, Becket, Swivel Shackle Head 1391 The Z Box Upgrade optionSheaves running on Acetal or Torlon ball bearings provide high performance & low friction. The 2 stage ball bearing system provides consistent performance over the full load range. Features a swivel shackle head for full 360 rotation. Features: Low friction Acetal or Torlon bearing system Lightweight Cheek cut outs for easy bearing maintenance Non Locking Applications: Mainsheet Halyard Vang Spinnaker control lines on off the beach catamarans, one