Mackay Isomount Type 3, item type 3

Mackay Isomount with high thrust height adjuster is the Type 3 version of the Isomount, 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 3 Isomount, fitted with the high thrust height adjuster, available for mobile applications where thrust is an issue. It covers 11 part numbers (M200245 to M240275) in three sizes: small with an M12 centre thread (M200245 to M200265, Duro 45 to 65), medium with M16 (M220245 to M220275, Duro 45 to 75) and large with M20 (M240245 to M240275, Duro 45 to 75). The maximum load without thrust runs from 50kg to 1000kg and the maximum load with thrust from 35kg to 700kg. The Type 3 weights are 0.6kg, 1.4kg and 2.9kg for the small, medium and large sizes. Recommended height adjusters where precise alignment is required and warns that excessive bending forces must not be put on the centre spindle.

Where this product is used

• Mobile applications where thrust is an issue (the Type 3 adjuster)
• 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

• Fitted with the high thrust height adjuster (Type 3) for mobile applications where thrust is an issue, with a top lock nut, adjusting nut and washer
• 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

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. When fitting the adjuster, place the washer hard against the top cap, fully locate the adjusting spindle into the isolator and fit the isolator with the adjuster in its mean position, then recheck alignment after tightening. If the adjuster does not give enough height, use shims or packing pieces under the mounting base.

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