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Blocks
 

Blocks by Type & Sheave Size 

Single Block Double Blocks Triple Blocks Cheek Blocks Fiddle Blocks Snatch Blocks Lead Blocks
Singles Doubles Triples Cheeks Fiddles Snatches Leads
Micro Micro Micro Micro Micro Micro Micro
Small Small Small Small Small Small Small
Medium Medium Medium Medium Medium Medium Medium
Large Large Large Large Large Large Large
Maxi Maxi Maxi Maxi Maxi Maxi Maxi
 

Sheave  Sizing Chart 

Micro Small Medium Large Maxi
mm in mm in mm in mm in mm in
16 5/8 27 1-1/4 40-42 1-9/16 60-64 2-5/8 90-110 4
19-20 3/4 29-30 1-5/16 43-48 1-7/8 66-70 2-3/4 120-130 5
22-23 7/8 33-36 1-3/8 50-51 2 75-76 3 140-175 6
25-26 1 37-38 1-1/2 55-57 2-3/16 80-90 3-1/2 180+ 7
 

Blocks by Working Load Limit in lbs 

Singles Doubles Triples Cheeks Fiddles Snatches Leads
0-150            
151-300            
301-500            
501-750            
751-1000            
1001-1500            
1501-2000            
2001-2500            
2501-3000            
3001-4000            
4001-5000            
5001-7000            
7001-10000            
10000-15000            
15000+            
 

Blocks by Manufacturer 

Ronstan Harken Schaefer Lewmar
 

Spare Parts and Sheaves 

Sheaves Shackle Attachments Bearings