Mackay M2255290 ANB Buffer, 70 x 50 x 43 mm, 816 Kg-F Compression Load

The Mackay ANB buffer is a cylindrical rubber body bonded to a square steel baseplate, with a fixing hole at each corner of the plate. Mackay says a special high-hysteresis rubber compound gives as much energy absorption as possible, uses the volume of the rubber at optimum efficiency, and effectively limits movement of equipment or machine components (manufacturer-stated).

This listing has three sizes: the M2255290 (70 mm plate, 816 Kg-F at 21 mm deflection), the M117001 (185 mm plate, 5000 Kg-F at 50 mm) and the M117002 (315 mm plate, 40000 Kg-F at 100 mm). Mackay says the rubber is stiffer under dynamic conditions than under static or pseudo static loading, so more energy is absorbed for a given deformation (manufacturer-stated). The 09/2026 catalogue lists these under Cylindrical Buffers and the older catalogue calls the type ANB.

Where this product is used

• Limiting movement of equipment or machine components (manufacturer-stated).
• Wagons, cabinets, traversing cranes, forestry vehicles, lifting cranes, off-road material handling equipment, working beams, container handling equipment and falling goods are the typical field applications Mackay lists (manufacturer-stated).
• Traverse cranes, where Mackay shows one buffer, or two buffers connected in series (manufacturer-stated).

Features

• Cylindrical rubber body bonded to a square steel baseplate with a fixing hole at each corner (manufacturer-stated)
• Special high-hysteresis rubber compound for as much energy absorption as possible (manufacturer-stated)
• Rubber volume used at optimum efficiency (manufacturer-stated)
• Low resilience of the rubber gives a high degree of energy absorption (manufacturer-stated)
• Simpler designs and lighter calculated forces can be considered on new machine developments, which can lower cost (manufacturer-stated)

Common specifications

Key specifications

* M117002 is marked "Special Order Only" by Mackay. Letters follow Mackay's drawing: K is the plate side, A the hole centre spacing, D the rubber diameter, d the hole diameter, H the height and t the plate thickness. "Not listed" means Mackay does not print a value for that part. Mackay lists compression load in Kg-F.

Selecting the right option

Match the compression load and deflection to the duty, then check your fixing points against the plate side (K), hole spacing (A) and hole diameter (d) of that size. Mackay does not print a plate thickness or weight for the M117001 and M117002, so confirm those with Mackay if you need them. Traversing and lifting cranes appear among Mackay's typical applications; this page does not give a lifting rating for any size, so confirm with Mackay for critical or crane duty. Mackay prints all properties as nominal and asks you to contact them for technical advice.

Related products

Other Mackay buffers: Mackay M113232 ANB Buffer Without Plate 170 x 130mm, Mackay Bonded Rectangular Buffer M15260 and Mackay Cylindrical Bonded Buffer.