Mackay Isomount Type 1, Large-M240075

Mackay Isomount isolator is a general-purpose vibration isolator for mobile and static equipment installations, suitable for marine applications. The Isomount has a mechanically galvanised base, offers 3-way control of engine movement with excellent isolation efficiency, and has bump and rebound control that prevents excessive movement under shock loads.

This is the Type 1 Isomount, which Mackay supplies without a height adjuster. It covers 11 part numbers (M200045 to M240075) in three sizes: small with an M12 centre thread (M200045 to M200065, Duro 45 to 65), medium with M16 (M220045 to M220075, Duro 45 to 75) and large with M20 (M240045 to M240075, Duro 45 to 75). The maximum load without thrust runs from 50kg to 1000kg and the maximum load with thrust from 35kg to 700kg, depending on size and Duro. Both height adjusters are available separately for each size and are linked below. Fitting an inappropriate height adjuster has in the past damaged the centre spindle and caused early failure of the isolator, so use the matching adjuster part numbers.

Where this product is used

• Mobile and static equipment installations
• Operation under all types of engines, with 3-way control of engine movement
• Marine applications, including isolation against propeller thrust when the isolator is arranged with its maximum stiffness (X) in line with the crankshaft

Features

• Mechanically galvanised base
• 3-way control of engine movement with excellent isolation efficiency
• Bump and rebound control that prevents excessive movement under shock loads
• Nominal stiffness ratios X = 2.5, Y = 0.75 and Z = 1.0, with maximum flexibility (Y) at right angles to the engine crankshaft and maximum stiffness (X) in line with it
• The Duro rating is stamped on the base plate, because Isomount isolators do not have Duro colour coding
• Type 1 is supplied minus a height adjuster, both adjuster types are available separately for each size

Key specifications

Choosing the right option

Choose the size from the load each isolator carries, then the Duro. The load figures are a reference to the maximum load acceptable for each rubber mix, so keep the load on each mount at or below the figure for its part number, and use the with-thrust figure where the mount takes thrust. Tighten the centre bolt to the recommended torque (45-50Nm for M12, 100-110Nm for M16, 150-170Nm for M20) and check there is no excessive distortion, misalignment or rotation of the top cap relative to the base afterwards. Where precise alignment is needed, use shims or packing pieces under the base plate or above the top cap, or step up to a Type 2 or Type 3 isolator with a height adjuster (linked below).

Related Mackay products: Mackay Isomount With General Purpose Height Adjuster, Mackay Isomount With High Thrust Height Adjuster, Mackay Isomount General Purpose Height Adjuster, Mackay Isomount High Thrust Height Adjuster.