Mackay M80155045 Duro 45 Recessed Flange Isolator 172 x 150 x 100mm

The Mackay 172 x 150 x 100mm recessed flange isolator is listed as four Duro grades under the catalogue base number M801550. Mackay makes its recessed flange isolators for high load capacity with relatively large static deflections in the axial direction, and says the rubber is used in both compression and shear to give a high loading for the size (manufacturer-stated).

The four part numbers (M80155045, M80155050, M80155060 and M80155070, Duro 45, 50, 60 and 70) each carry two figures in the Max Load column: 400 to 1200 kg at 7 mm displacement and 640 to 1860 kg at 11 mm displacement. The plate is 172 x 150 mm with four ø11 mm holes, the centre bolt is M24 torqued to 260 Nm, and each isolator weighs 4.5 kg (manufacturer-stated). Mackay lists the overload and rebound washers as ordered separately, with M181550C for both positions (manufacturer-stated).

Where this product is used

• Supporting equipment that needs high load capacity with relatively large static deflections in an axial direction (manufacturer-stated).
• Installations where overload and rebound washers control and limit the movement of the suspended equipment under shock loads (manufacturer-stated).

Features

• Rubber is used in both compression and shear, which gives high loading for the size (manufacturer-stated)
• Four Duro grades (45, 50, 60 and 70), each with two Max Load figures at 7 mm and 11 mm displacement (manufacturer-stated)
• Parts are colour coded by Duro and also stamped with their Duro (manufacturer-stated)
• Overload and rebound washers (M181550C) are ordered separately (manufacturer-stated)
• M24 centre bolt with a recommended assembly torque of 260 Nm (manufacturer-stated)

Common specifications

Key specifications

Figures are from the Mackay Vibration Isolators catalogue (Industrial Edition 09/2026). Dimensions are in millimetres. Mackay prints all properties as nominal and asks you to contact them for technical advice. The earlier Industrial Rubber Technology catalogue lists different colours for Duro 45, 50 and 70 (blue, pink and orange), so check the Duro stamped on the part rather than relying on colour.

Selecting the right option

Choose the Duro by load first. Each part number has a Max Load at 7 mm displacement and a higher Max Load at 11 mm displacement, so compare the load each mount carries with the figure at the displacement you are designing for. Check the base plate against your steelwork: 172 x 150 mm, with four ø11 mm holes on 144 x 100 mm centres. Order the M181550C overload and rebound washers separately (linked below) and torque the M24 centre bolt to 260 Nm. Mackay prints all properties as nominal, so contact Mackay for technical advice on critical loads.

Related products

Overload and rebound washer for this isolator: Mackay Recessed Flange Steel Washer M181550C. Other Mackay recessed flange isolators: Mackay Recessed Flange Isolator Type 70, Mackay Recessed Flange Isolator Type 31 and Mackay Recessed Flange Isolator Type 409, 89 x 54 x 30mm.