Ronstan Marine Systems DivisionRonstan Marine Systems Division
 
Roller Ball Bearing Blocks
 

Series 75mm

Range Information | Applications | Materials | Related Items

Smart Features
  •  High static and dynamic load capacity
  •  Minimal friction across the working load range
  •  Reliable, trouble-free performance
  •  Simplicity of design and construction facilitate maintenance and servicing

 

   
Product No.
Desc.
Sheave ØMax. Rope ØMax. Cable ØPin ØM.W.L.B. L.Weight

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Stock

Price

  in.in.inin. lb.lb.oz.        
 RF71100 RF71100 > Single, AP sheave/bearing

3

9/16

-

5/16

3310

8770

15.6


 
 

NOT
AVAILABLE
ONLINE

---

Price

$ 203.05

 RF78100 RF78100 > Single

3

9/16

-

5/16

4390

8770

16.8


 
 

NOT
AVAILABLE
ONLINE

---

Price

$ 347.24

 RF78108 RF78108 > Single, halyard

3

9/16

-

3/8

3660

7320

10.5


 
 

  QTY
 

IN
STOCK

Price

$ 306.92

 RF78110 RF78110 > Single, becket

3

9/16

-

5/16

4390

8770

18.7


 
 

NOT
AVAILABLE
ONLINE

---

Price

$ 389.03

 RF78140 RF78140 > Single, stand-up

3

9/16

-

-

4390

8770

20.3


 
 

NOT
AVAILABLE
ONLINE

---

Price

$ 473.45

 RF78202 RF78202 > Double, non-swivel head

3

9/16

-

-

4390

8770

22.6


 
 

NOT
AVAILABLE
ONLINE

---

Price

$ 599.45

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Range Information
These blocks have the strength and durability to meet the requirements of racing and cruising. Block cheeks are manufactured from the highest quality alloy for maximum strength. The cut-away design minimises weight and allows easy fresh water rinsing of salt and debris from the bearings. Blocks can be disassembled for servicing or customisation.

  
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Applications
  • Mainsheet on boats to 14m (46ft)
  • Halyard and spinnaker sheets on boats to 15m (50ft)
  • Backstay applications on boats to 11m (36ft)
  • General control line applications on larger yachts
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Materials
  • Alloy cheek plates
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