A Letter From Our President. During the current situation with the COVID-19 virus, Precision Roll Grinders remains open for business to meet all of our customers’ roll servicing needs. The health and safety of our employees, as well as our customers and partners, is of primary concern. We are monitoring the COVID-19 situation very closely, taking appropriate health measures, and are confident we can abide by locally imposed policies while continuing to seamlessly support and provide value to our customers’ business operations. If you have any questions about PRG’s accessibility or operations please do not hesitate to contact us.

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PRG offers dynamic balancing for all rolls, rotors and drums.

Our Schenck Horizontal Dynamic Balancing Machine (hard-bearing with permanent calibration) enables the precise simulation of in-plant operating conditions, and allows us to fine-tune adjustments to units prior to shipment from our plants.

Our dynamic balancing is done in accordance with ISO 1940/1 and ANSI S2.19 standards. We can balance any grade between G-0.4 to G-6.3. Click here for detailed specs.

PRG's Dynamic Balancing
Rotor Mass Limitations
Weight range for rotors in their own bearings,
mounted directly on the dynamometer:
400 - 160,000 lbs.
Rotor weight x speed (Wn2) for H80
Dynamometer not to exceed:
8880 x 106 lb/min2
Rotor polar moment of inertia x speed (Wk2n2)
not to exceed:
20,000 x 106 lb-ft2/min2
The (Wk2)n2 value is based on a 75 hp DC motor.
Instrumentation speed range:
120 - 3300 rpm
Maximum permissible roller speed: 6000 rpm
Rotor Dimensions:
Max. distance between support bearing centerlines:
Min. distance between support bearing centerlines:

555 inches
16 inches
Drive to Workpiece
Balancing speed over a 10" driven diameter based
on 1750 rpm base speed; infinitely variable
up to a maximum of:
Maximum surface speed:



835/1455/3060 rpm
8000 ft/min

PRG’S SERVICE BEGINS WITH A FREE CONSULTATION AT YOUR FACILITY.

Interested in learning more about this PRG service and how it can benefit your company’s rolls? Give us a call. We’ll visit with you to discuss in detail how we can improve roll life in your particular application. The consultation is absolutely free.

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