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Ronstan Series 50 Utility

Ronstan Series 50 Utility

Regular price $82.30
Regular price Sale price $82.30
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Series 50 All Purpose Block - Single - Universal Head

All purpose (AP) blocks are a great all around solution. Self-lubricating Acetal polymer sheaves running on polished stainless steel races perform equally well with dynamic loads and high static loads. For durability and a long service life, these blocks are the right choice for sheets, halyards and control line applications for cruising and racing. Captive Lock™ universal head can be fixed in either of two planes, or free to swivel as required


  • Exceptionally high working loads
  • Low maintenance, long service life
  • Self lubricating sheave
  • Captive Lock™ universal head
  • Slotted pin shackle eliminates fouled lines

Mainsheet and halyard applications, vang and spinnaker control lines on boats to 10M(33\')


  • Nylatron® sheave
  • Grade 316 stainless steel load strap and head fitting
  • Impact and U.V. resistant, fiber reinforced Nylon cheeks

Sheave Ø: 50mm(2")
Max. Rope Ø: 12mm(1/2")
Max. Pin Ø: 5mm(3/16")
M.W.L.: 750kg(1,650lbs)
B. L.: 1,500kg(3,310lbs)
Weight: 118g(4.1oz)

Series 50 All Purpose Block - Single - Universal Head with Becket

50 Series BB Single block with becket

Pulley diameter: 50mm
Maximum line diameter: 12mm
Pin diameter: 5mm
Maximum working load: 500kg
Breaking load: 1500kg
Weight: 133g

Low friction, 2-stage ball bearing system provides consistent performance over the full load range.
High static and dynamic load capacity.
Light weight.
Captive Lock™ universal head can be fixed at 0 or 90 degrees, or left free to swivel 360 degrees.
Cheek cut-outs for easy bearing maintenance.

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