tamper(redirected from tampered)
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a power tool for compacting soil, concrete mixes, and other substances. Tampers are used for small, isolated jobs, for hard-to-reach and cramped spaces, and for the consolidation of molding sand in foundry work.
A tamper may have an electric or pneumatic drive, which imparts a reciprocating motion to an impact mechanism with a sole plate. The control handle has a shock absorber. Electric tampers produced in the USSR weigh up to 150 kg, and their productivity is as high as 80 cu m per hr. The tampers used in foundry work are mainly pneumatic; they weigh up to 25 kg and have a productivity of up to 20 cu m per hr.