Piston Extension Set for Field CBR Test properly positions the CBR Penetration Piston for California Bearing Ratio (CBR) field testing. Extensions allow extra flexibility when the setting distance between the loading jack base and soil surface. The kit contains one 36in (914mm) tube, one 24in (610mm) tube, three 12in (305mm) tubes, two 4in (102mm) tubes, and two 1.5in (38mm) tubes.

Features:

Extensions supplied in five different lengths
Designed to properly position penetration piston

Included Items:

Piston Extension Set for Field CBR Test

Product tags

ASTM D4429 (6)

Specifications

Attribute name	Attribute value
Length	Tube Lengths: 1.5in (38mm), 4in (102mm), 12in (305mm), 24in (610mm), and 36in (914mm)
Estimated Shipping Weight	48.0lb (21.77kg)

Product Q&A

Q: How are longer specimens extracted and the piston returned?

Specimens longer than 5in are extracted by repositioning the Adapter Ring after maximum piston travel, and the spring-loaded piston automatically returns to the start position when the release valve is opened.