Rulmeca Motorized PulleysInstalled in Cline Resources

Underground Coal Mines Cline Resources recently added more ”EZMP” dualdrive systems to their inventory of Rulmeca MotorizedPulley conveyor drives.

After verifying the reliability of the compact dual driveat their West Virginia and Illinois mines, the coal pro-ducer decided to install the system at multiple mines.

The trial consisted of moving 1,200 tph of ROM coalat 600 fpm on a 48” wide conveyor belt with two 75HP model 630H Rulmeca Motorized Pulleys, nestedinto a special frame by Kerco, Inc. of Madisonville, KY.

The EZMP drive system was tested on conveyors whichextend from 800' to 1,200' long to accommodate the move-ment of the continuous miners. With a 24.8" diameter and a55.12" face width, the model 630H Motorized Pulley has a nar-row footprint. And each 75 HP drive only weighs 2,200 lbs.The drive’s compactnessand light weight areadvantageous whenmoving belt conveyors inrestricted spaces.

Todd Leverton, MaryanMine superintendent,said, “I first heard aboutthe Rulmeca MotorizedPulleys several yearsago, but didn’t have achance to try them untilrecently. I’m happywe’ve incorporated thesedrives into our minebecause their reliabilityand low maintenancerequirements will help us maintain our aggressive productionrate. We have a great esprit de corps at the Maryan Mine. Weproduce 9 tons of 11,000 btu coal per man-hour with two con-tinuous miners. We’re very proud of that.”

Two 75 HP Rulmeca Motorized Pulleys in “nested dual” arrangementmove 1,200 tph of ROM coal at 600 fpm on 48” wide 1,200’ longunderground conveyor belt. Note the absence of external motor,gearbox, and pillow blocks. All mechanical components are hermeti-cally-sealed within the pulley’s oil-filled shell.

COAL PEOPLE MAGAZINE - www.coalpeople.com March 2011

Rulmeca's AC motor and gearbox, hermetically sealed with-in the oil-filled Motorized Pulley shell, offer high reliabilityand low maintenance requirements.

Rulmeca Motorized Pulleys were tested at MacoupinEnergy’s Maryan Mine in the Illinois Coal Basin in 2010.

Todd Leverton, superintendent ofMaryan Mine

Developed in 1953 in Europe, Rulmeca MotorizedPulleys offer mines and prep plants an optimal alter-native to exposed drive systems with diametersfrom 5.5” to 40", powers up to 330 HP, and beltspeeds up to 1,320 fpm.

Since they enclose all drive components within anoil-filled and hermetically-sealed pulley shell,Rulmeca Motorized Pulleys increase system relia-bility, lower maintenance expense, improve person-nel safety, save space, and reduce power consump-tion. For more information, contact Mike Gawinski,Rulmeca Corp., Wilmington, NC, at 910-794-9294.

“We’ve been actively promoting Rulmeca Motorized Pulleyssince the early 1990’s,” said Kerco’s president, Chuck Reed,“but it wasn’t until our company packaged Rulmeca MotorizedPulleys into our EZMP Dual Drive (patent pending) in 2008 thatwe began to see significant interest from coal producers.” Withunderground coal mines in three states now using the dualdrive system, Rulmeca has invested in stock to decrease pro-duction lead time to serve US coal mines.

March 2011COAL PEOPLE MAGAZINE - www.coalpeople.com

Built for underground coal mines, Kerco's 150 HP driveincludes two 75 HP Rulmeca Motorized Pulleys and maybe mounted to mine floor or ceiling. Optional boom con-verts system from booster to discharge end drive.

With 24.8" diameter and 55.12" face width, model 630H MotorizedPulley has narrow footprint. Each 75 HP drive only weighs 2,200 lbs.Drive compactness and light weight are advantageous when movingconveyor in restricted spaces below the earth’s surface.

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