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Blocks

Blocks

Ronstan designs and manufactures world-class blocks and pulleys for all types of sailing. The comprehensive range allows customers to choose sheave material, bearing style, and configuration, with sizes to suit anything from a small dinghy to a Maxi yacht. Click below or contact us for assistance in selecting the perfect block for your specific budget and application.

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479 Products

  2. Ball Bearing
    Series 15 Ball Bearing Block with Loop Top
    RF15101 Series 15 Ball Bearing Block with Loop Top
    A lightweight yet strong block with a single 15mm sheave, stainless steel cheeks and a loop head with an o-ring.
    A$17.49 inc. GST
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  3. Ball Bearing
    Series 15 Ball Bearing Block to suit Webbing Attachment
    RF15107 Series 15 Ball Bearing Block to suit Webbing Attachment
    A lightweight yet strong block with a single 15mm sheave and stainless steel cheeks, specifically made for webbing attachments up to 10mm (3/8").
    A$18.74 inc. GST
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  4. Ball Bearing
    Series 15 Ball Bearing Block with Loop Top and Becket
    RF15111 Series 15 Ball Bearing Block with Loop Top and Becket
    A lightweight yet strong block with a single 15mm sheave, stainless steel cheeks, becket and a loop head with an o-ring.
    A$21.34 inc. GST
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  7. Ball Bearing
    Series 15 Ball Bearing Cheek Block with Single Fastener Hole
    RF15151A Series 15 Ball Bearing Cheek Block with Single Fastener Hole
    A lightweight yet strong cheek block with a single 15mm sheave, stainless steel cheeks, and a single fastener hole.
    A$21.57 inc. GST
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  8. Ball Bearing
    Series 15 Ball Bearing Block with Hook
    RF15180 Series 15 Ball Bearing Block with Hook
    A lightweight yet strong block with a single 15mm sheave, stainless steel cheeks, and a 4.6mm (3/16") diameter pivoting hook.
    A$28.93 inc. GST
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Category
Bearing Type
  1. All Purpose 85items
  2. Ball Bearing 236items
  3. High Load 7items
  4. Special Purpose 27items
Price
Type of Block
  1. Single 158items
  2. Double 38items
  3. Triple 28items
  4. Quad 3items
  5. Quin 3items
  6. Ratchet 29items
  7. Fiddle 30items
  8. Cheek/Foot 29items
  9. Stand-Up 16items
  10. Deck Organisers 6items
  11. Exit 16items
  12. Snatch 13items
  13. Low Friction Rings & Shocks 16items
  14. Upright Lead 25items
  15. Over the Top 1item
  16. Flip-Flop 6items
  17. Two-Speed 6items
  18. Linked 6items
Sheave Size Range (mm)
  1. Less than 15 1item
  2. 15-20 53items
  3. 21-30 58items
  4. 31-40 73items
  5. 41-50 30items
  6. 51-60 67items
  7. 61-70 2items
  8. 71-80 35items
  9. 91-100 18items
  10. 121-130 5items
  11. 141-150 4items
  12. 171-180 3items
  13. 191-200 1item
M.W.L. Range (kg)
  1. 1-150 20items
  2. 151-300 99items
  3. 301-450 58items
  4. 451-600 60items
  5. 651-750 17items
  6. 751-900 9items
  7. 901-1050 24items
  8. 1051-1300 7items
  9. 1301-1450 1item
  10. 1451-1600 12items
  11. 1601-1750 1item
  12. 1751-1900 6items
  13. 1901-2050 5items
  14. 2051-2300 9items
  15. 2301-2450 1item
  16. 2451-2600 1item
  17. 2901-3050 6items
  18. 3051-3300 7items
  19. 3451-3600 1item
  20. 3601-3750 1item
  21. Greater than 3751 21items
Max. Rope diameter (mm)
  1. 3 2items
  2. 4 4items
  3. 5 38items
  4. 6 45items
  5. 8 63items
  6. 9 19items
  7. 10 102items
  8. 12 73items
  9. 14 59items
  10. 16 11items
  11. 18 11items
  12. 19 3items
  13. 20 4items
  14. 22 2items
  15. 24 2items
  16. 25 3items
  17. 26 1item
  18. 28 1item
  19. 32 2items
  20. 8 + 6 1item
Sheave diameter (mm)
  1. 13mm 1item
  2. 15mm 20items
  3. 19mm 5items
  4. 20mm 36items
  5. 22mm 1item
  6. 25mm 16items
  7. 26mm 1item
  8. 28mm 3items
  9. 29mm 1item
  10. 30mm 51items
  11. 32mm 1item
  12. 38mm 2items
  13. 39mm 2items
  14. 40mm 82items
  15. 45mm 8items
  16. 50mm 28items
  17. 51mm 2items
  18. 55mm 26items
  19. 59mm 1item
  20. 60mm 50items
  21. 64mm 2items
  22. 66mm 1item
  23. 73mm 1item
  24. 75mm 50items
  25. 80mm 2items
  26. 100mm 23items
  27. 120mm 1item
  28. 140mm 1item
  29. 150mm 6items
  30. 180mm 3items
  31. 200mm 1item
  32. 20mm, 30mm 1item
  33. 40mm + 25mm 1item
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ABOUT US

Ronstan International Pty. Ltd. 
19 Park Way, Braeside 
Victoria 3195, Australia

Official Sponsors of the Australian Sailing Team

© 2026 Ronstan International Pty. Ltd. all rights reserved.