MBW Compaction and Concrete Construction Equipment

MBW works continuously to lower maintenance and extend life expectations of its rammers. We now introduce the industry's first percussion system completely free of high friction/heat/wear metal-on-metal reciprocating wear surfaces. The patented design features c-shaped, non-metallic, slide bearings between spring separator and spring box, ram shaft and spring box, and spring box and guide tube. Wear characteristics of the MBW bearings are several times better than traditional steel-on-cast iron designs. Lower operating friction/heat provide positive implications for engine, lubricant and bellows life. In the event percussion system lubricant is lost,

MBW percussion systems are designed to fail a single slide bearing, locking up the system and preventing damage to other bearing surfaces, as well as bearings and seals in the rammer's gearbox. Because MBW percussion systems generate less internal friction, rammers operate more efficiently, consume less fuel, and deliver more compaction force for the purpose intended. When replacement is eventually called for, MBW slide bearings are replaced at low cost, returning percussion systems to original specification. 

Endurance testing of the new design exceeded even MBW's expectations. As a result, MBW gas powered rammers now provide a 5 YEAR WARRANTY on percussion system slide bearings and bellows.

LIMITED WARRANTY. Some restrictions may apply.

MBW R422 Rammer MBW R442 Rammer
MBW R422 Rammer MBW R442 Rammer


The 422 & 442 Rammers are ideally suited for the compaction of granular, mixed and cohesive soils in confined areas. A mainstay in contractor and municipal fleets, the 422 & 442 offer highly productive percussion rammers at less than 145 or 150 lbs. respectively. The contoured fuel tank provides the largest fuel capacity in its class and effectively baffles engine noise. Power is supplied by Honda engines. Model 442 delivers approximately 25% more compaction force and is recommended for heavy clay soils. Available with a choice of three engines...Honda GX100, Honda GX100 with oversized air filter or Honda GXR120

• Elevated bellows placement for trench applications
• Patented polyethylene slide bearings provide minimal internal wear
• 11” ductile cast iron tamping shoe
• 4” and 6” trench shoes available for the 422

The 482 rammers are equipped with an integral tachometer and hour meter that indicates when maximum operational performance is being reached and when maintenance intervals are needed. The result is higher productivity and increased service life. Weighs between 158-177 lbs. (72-80 kg). Available with a choice of three engines...Subaru Robin EH12, Honda GX100 or Honda GXR120.


MBW Rammers Specifications

Manuals and Literature

Rammer Brochure

R422 Rammer Manual

R442 Rammer Manual R482/483 Rammer Manual
Rammer Product Brochure MBW R422 Rammer Manual MBW R442 Rammer Manual MBW R482/483 Rammer Manual


Rammers -R422/R442/R482 Rammer Assembly
Rammers Video Rammer Assembly Video






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