Ball Bearing

RF46100M

Series 40 Ball Bearing Orbit Block™, Manual Ratchet

Single ratchet block with manual ON/OFF ratchet selection and swivel shackle head

FEATURES

Up to 14:1 holding power - highest available!.

Smooth easing of sheetsManual ON/OFF ratchet selection.

Swivel shackle head for unlimited block rotation.

Stainless steel shackle head and compatibility with sharp fixing points.

Specifications

Product Specifications
B.L. (kg)500
M.W.L. (kg)175
Max. Rope diameter (mm)9
Weight (g)38
Pin Ø (mm)4

Product Information

Manual ratchet option

Now you can enjoy the flexibility of setting up your fitout exactly to suit yourself. Ronstan is the only company that offers a 40mm ratchet block with both auto and manual engagement models.*

Manual modes allow the ratchet mechanism to be switched on or off as required. This is the preferred mainsheet set-up for many top sailors.

* Selected Series 40 models.

Awesome ratchet block holding power

Quite simply, Ronstan Ratchet Orbit blocks™ have the highest holding power available. The sophisticated NC-machined sheave features Generation 2 of our patented sheave cross-hole geometry. The Series 40 delivers up to 14:1 holding power, almost double that of our nearest competititor.

The unique sheave design has 8 gripping faces which directly resist loaded line movement. Traditional designs have an angled resistance to line movement.  Our Generation 2 design has straight resistance faces which both distribute the load and minimise rope wear. These faces are offset from the radial line, to draw the rope down into the gripping area when under load.

Smooth easing of sheets

With auto models the sheet runs out smoothly and freely as soon as the ratchet mechanism disengages. When engaged, and with manual models, the sheave cross - hole geometry eliminates the 'shuddering' ease-out that you can expect from traditional v-groove ratchet blocks.

Low profile stand-up kit allows  0° or 90° alignment

Stand-up kits feature a clatter-free rubber boot.  It's a neat low-profile solution which allows full articulation.

Technical Information

Applications

  • Dinghy mainsheet systems
  • Mainsheet fine tune systems on sportsboats & small keel boats
  • Mainsheet systems on sportsboats using RF7 mainsheet swivel cleat unit
  • Spinnaker and job sheets on dinghies - especially modern asymmetric classes
  • Control line applications on larger yachts

 

Materials

  • Sheave: Anodised Aluminium
  • Ball Bearings: High compression strength carbon black Acetal
  • Frame/Cheeks: Toughened, glass fibre reinforced Nylon
  • Shackle and Head fitting: Grade 316 stainless steel

 

Resource Files

dwg
zip

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