Description
The EMPH Grand Prix 3.75-ton Aluminium Mast Jack is engineered for high-performance sailing applications where weight, precision, and reliability are critical. Manufactured from high-strength aerospace-grade aluminium and hard-coated for corrosion resistance, this jack delivers professional-grade performance in an extremely compact package.
Designed for internal mast stepping and rig tensioning systems, this model operates efficiently at both 350 bar and 700 bar hydraulic pressures. All EMPH mast jacks are gravity return as standard, with optional spring return available on request.
Port orientation, mounting thread, and stroke length can be customised to suit specific yacht designs and rigging requirements.
Key Features
Aerospace-grade aluminium construction
Hard-coated dark bronze finish
Compact, lightweight design
Internal mast jack configuration
Gravity return (spring return optional)
Custom mounting threads available
Technical Specifications
Capacity @ 350 bar: 1.8 tons
Capacity @ 700 bar: 3.75 tons
Stroke: 50 mm
Barrel Ø: 40 mm
Bore Ø: 26 mm
Rod Ø: 22 mm
Mounting Thread: M42 × 1.5 (or customer specified)
Collapsed Height*: 146 mm
Extended Height*: 196 mm
Port: 1/4″-18 NPT
Mass: 0.41 kg
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