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© Steve Jost
Harken Vang-Master
Harken is now collaborating with Marine Products Engineering to offer 
Vang-Master rigid pneumatic boom vangs. Vang-Master boom vangs 
use air pressure to provide extension force to hold the boom up, 
without the need for metal springs. This reduces parts and weight 
while keeping operation squeak free, providing an infinitely adjustable, 
turnkey solution for maintaining optimal mainsail shape. Construction 
is hardcoat-anodized 6061-T6 aluminum, making them light and strong. 
Tubing and end fittings are threaded together 
eliminating fasteners and dissimilar metals to reduce corrosion.
Harken Vang-Masters are designed to be easy to install. Options 
available are external purchase systems which feature Harken 
hardware exclusively. They come pre-measured, spliced and 
finished with line specifically-selected for the application.  
Harken distribution makes the vangs easy to obtain, while 
offering fast turnaround on spare parts and technical service.
Vang-Masters are available in eight standard sizes for boats 5-17 m 
(18-56 ft). Stainless steel mast and boom fitting and custom lengths 
are also available. Contact Harken for a price and lead time.
Part
No.
Description
Pin center 
length (closed)
Pin center 
length (open)
Stroke
Weight
Pin
Ø
Jaw width
Maximum
return force
in
mm
in
mm
in
mm
lb
kg
in
mm
in
mm
lb
kg
 VM13240 
 Vang-Master 1 
 32 
 813 
 40 
 1016 
 8 
 203 
 2.75 
 1.25 
 3/8 
 10 
 1/4 
 6 
 350 
 159 
 VM24353 
 Vang-Master 2 
 43 
 1092 
 53 
 1346 
 10 
 254 
 3.4 
 1.54 
 3/8 
 10 
 1/4 
 6 
 350 
 159 
 VM33444 
 Vang-Master 3 
 34 
 864 
 44 
 1118 
 10 
 254 
 4.35 
 1.97 
 1/2 
 12.7 
 1/4 
 6 
 500 
 227 
 VM44656 
 Vang-Master 4 
 46 
 1168 
 56 
 1422 
 10 
 254 
 5.5 
 2.49 
 1/2 
 12.7 
 1/2 
 12 
 500 
 227 
 VM54860 
 Vang-Master 5 
 48 
 1219 
 60 
 1524 
 12 
 305 
 8.3 
 3.76 
 1/2 
 12.7 
 1/2 
 12 
 800 
 363 
 VM66274 
 Vang-Master 6 
 62 
 1575 
 74 
 1880 
 12 
 305 
 10 
 4.54 
 5/8 
 15.9 
 5/8 
 16 
 800 
 363 
 VM76274 
 Vang-Master 7 
 62 
 1575 
 74 
 1880 
 12 
 305 
 12.9 
 5.85 
 5/8 
 15.9 
 5/8 
 16 
 1500 
 680 
 VM87385 
 Vang-Master 8 
 73 
 1854 
 85 
 2159 
 12 
 305 
 14.6 
 6.62 
 5/8 
 15.9 
 5/8 
 16 
 1500 
 680 
Purchase systems are available for 
each Vang-Master size with 4:1 or 6:1 
mechanical advantage in single- or 
double-ended configurations.

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