Hardgrove Grindability Tester, 220V/1PH/50Hz

Z90-9301-01Preiser Hardgrove Grindability Tester 220V/1PH/50Hz

Preiser Scientifics Grindability Tester is a compact precision built instrument designed specifically for the determination of the relative hardness or abrasive potential of coal. Unit is constructed in strict accordance with ASTM Designation D-409 and conforms to procedures proposed by ISO for the determination of the Hardgrove Grindability index of coal and coke.


  • Stationary lower steel grinding bowl is mated with an upper grinding ring consisting of eight steel balls that rotate at 20 rpm.
  • Grinding ring is rotated by a motor/belt driven spindle to which 29kg of removable weights are attached that bear onto the eight rotating balls.
  • A counter/switch assemble totals the number of revolutions and automatically stops the machine at the end of 60 revolutions.
  • Sample loading is remarkably easy because of the design of the machine.
  • Machine is virtually maintenance free because high-quality and durable materials have been used in the manufacture of this instrument.
  • Shipping weight: 180lbs.

Supplied with

  • Grinding Balls (8/set).
  • Upper and Lower Grinding Elements.
  • Automatic Counter/Switch and Timing Belt.
  • 29kg removable wts.

Additional Models

Catalog Number Volts/Phase/Hertz

Additional Information

Brochure   PDF PDF 105kb

Parts Drawing   PDF PDF 159kb

Manual  PDF PDF 69kb

Catalog # Product Description
Z90-9301-01Preiser Hardgrove Grindability Tester 220V/1PH/50Hz By Quote Only
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ISO Certificate

Certificate of Analysis