M Series Cylinders

M Cylinders

The Navtec ultra-light, custom 7500 psi M Cylinder delivers maximum muscle where it is needed most on the world’s top racing yachts. The standard on TP52s, IRC designs, and high-performance race yachts, the M Cylinder has helped drive America’s Cup class winners since 1992.

By designing a cylinder that operates at 7500 psi rather than the standard 5000 psi or the heavier 10,000 psi, Navtec have improved the hydraulic working performance. Higher pressure results in faster performance alongside a reduction in size and weight. Machined from one long bar with an integral cylinder end fitting, weight has been reduced by eliminating the need for a mechanical end fitting. Eliminating the need for seals at the cylinder end has reduced the overall length. Machining the cylinder from a solid bar means that an unlimited number of end fittings can be incorporated, including clevis, jaw, eye, lashing eye, and threaded.

For the America’s Cup yachts, the Navtec cylinder is machined from a high-strength 7000 series aluminum material, while a more marine stable 6000 series aluminum is used for grand prix race yachts where longer life span is required. While the 6000 series aluminum increases the weight of the cylinder by approximately 6%, the life span increases from 2-3 years to 6-8 years without compromising on performance.

The M Series Cylinder integrates with the Navtec 7500 psi Valve, providing a sophisticated hydraulic system that delivers the highest level of performance.


A284 M-Cylinders

Cylinder SizeRod ThreadRod DiameterPin & GapTube ODMax Pull Load*Max Push Load**
M195/16 – 2431/99 in (8.0 mm)3/8 in (9.5 mm)1.07 in (27.2 mm)2,980 lbs (1,350 kg)3,600 lbs (1,635 kg)
M253/8 – 243/8 in (9.5 mm)7/16 in (11.1 mm)1.37 in (34.8 mm)5,100 lbs (2,315 kg)5,910 lbs (2,680 kg)
M337/16 – 2038/87 in (11.1 mm)1/2 in (12.7 mm)1.79 in (45.5 mm)9,010 lbs (4,090 kg)10,220 lbs (4,635 kg)
M391/2 – 201/2 in (12.7 mm)5/8 in (15.9 mm)2.08 in (52.8 mm)12,320 lbs (5,590 kg)13,720 lbs (6,225 kg)
M455/8 – 185/8 in (15.9 mm)5/8 in (15.9 mm)2.42 in (61.5 mm)16,320 lbs (7,405 kg)18,620 lbs (8,450 kg)
M5211/16 – 1616/93 in (17.5 mm)3/4 in (19.1 mm)2.76 in (70.1 mm)21,430 lbs (9,725 kg)24,240 lbs (11,000 kg)
M6413/16 – 1613/16 in (20.6 mm)7/8 in (22.2 mm)3.43 in (87.1 mm)33,750 lbs (15,315 kg)37,670 lbs (17,090 kg)

M Series Vang

The M Series Vang incorporates an M Series Cylinder with a carbon fiber/ Kevlar extension tube to produce a unit that operates in the same way as the Navtec Light Vangs. The standard version uses an internal tie rod to carry the tension load, while a gas-charged option is available where return pressure is required. Removing the tie rod reduces weight, with the carbon/Kevlar tube carrying both the tension and compression loads. In this instance, the tube is glued permanently to the cylinder and the clevis. The Navtec M52 Vang is suitable for use in predominately light sailing conditions, while the Navtec M64 Vang is suitable for use on larger boats where the loads are higher.