Grinding Balls are used for testing in accordance with ASTM D409 and the Hardgrove Machine Method to determine the Hardgrove Grindability Index (HGI) of coal samples. The 1in (25.4mm) Dia. polished steel grinding balls come in a set of 8, and are available as replacement or additional units for testing with LC-100 Hardgrove Grindability Tester.

Features:
Made of durable polished steel
Performs in accordance with ASTM D409

Included Items:

Grinding Balls for Hardgrove Grindability Tester

Product tags

ASTM D409/409M (3)

Specifications

Attribute name	Attribute value
Diameter	1in (25.4mm)
Material	Polished Steel
Quantity	Set of 8
Estimated Shipping Weight	2.0lb (0.91kg)

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.