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These sliding drop hammers are used to compact soil samples for moisture-density relationship (Proctor) testing. Gilson Hammers are constructed from rust-resistant plated steel and have a 2in (51mm) circular face. Hammer masses are enclosed in guide sleeves with vent holes to insure unrestricted free-fall.
HM-550 Standard Compaction Hammer has 5.5lb (2.5kg) mass with 12in (305mm) drop. Dimensions: 21x2.2in (533x55mm) LxDia.
HM-551 ASTM Modified Compaction Hammer has 10lb (4.5kg) mass and 18in (457mm) drop. Dimensions: 31x2.2in (787x55mm) LxDia.
Inquire for old-style U.S. Army Corps of Engineers compaction hammers. Contact Us.
HM-550: 21 x 2.2in (533 x 55mm) L x Dia.
HM-551: 31 x 2.2in (787 x 55mm) L x Dia.
HM-550: 9.0lbs (4.08kg)
HM-551: 15.0lbs (6.80kg)
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