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Accelerated Polishing Machine

Select Item: $18,223.50 HM-614  Accelerated Polishing Mach,ASTM/AASHTO,115V/60Hz $18,223.50 HM-614F  Accelerated Polishing Mach,ASTM/AASHTO,230V/50Hz $22,379.50 HM-615  Accelerated Polishing Mach,BS 812,115V/60Hz $22,379.50 HM-615F  Accelerated Polishing Mach,BS 812,230V/50Hz Specify Quantity:     Accessory Selection Guide     Estimated Shipping Weight: 450.0 pounds   204.1 kilograms Test Methods AASHTO T279 ASTM D 3319 Recent Items Accelerated Polishing Mach,ASTM/AASHTO,115V/60Hz Gilson Durability Index Apparatus, 115V/60Hz Specific Gravity Asphalt Bulk Device, 120-240V/50-60Hz Specific Gravity-Hubbard Bottle Methylene Blue Value Set

HM-614 pictured

HM-614

The Accelerated Polishing Machine determines aggregate wear through action of vehicle tires. 3/8-1/2in (9.5-2.7mm) pieces of aggregate are bonded in molds to form fourteen curved segments. Segments are clamped to the road wheel to form a continuous aggregate surface 1-3/4in (44.5mm) wide and 16in (406mm) in diameter. In testing, the road wheel is driven at 315-325rpm in loaded contact with an 8in or 200mm diameter rubber-tired wheel while abrasive is fed to the contact area. Friction values are determined after polishing by use of a Surface Friction Tester (See Gilson HM-602W).

The HM-614 consists of a welded steel frame on adjustable pads. This unit maintaining an 88lbf (391N) load on the road wheel and utilizes silicon carbide grit abrasive with a special grit feeder and Goodyear pneumatic-tired wheel assembly. The road wheel is driven by TEFC motor via an adjustable timing belt. Tests are automatically terminated by a preset revolution counter. Water is gravity fed from a tank through a calibrated flow meter, and is collected with used abrasive in a removable tray. Tire loadings to the road wheel are controlled by a mechanical lifting device. Units are supplied with two specimen molds, two mold plates, required feeders, wheel assemblies, wrenches, mounting pads, and operating instructions. Order abrasives separately. Each ASTM/AASHTO test requires about 10lb (4.5kg) of silicon carbide grit. Overall Machine Dimensions: 30x28x42in (762x711x1,067mm), WxDxH. Est. Ship Wt.: 450lb (205kg).