Pit & Quarry, April 2010

ant guard True costs include the actual labor involved to design construct and install the guard as well as the overall cost of the materials used An additional problem with this class of guard is that it routinely weighs much more than one person can effectively install and remove Such guards normally do not allow for ease of maintenance and are not designed to allow for any type of routine maintenance There are commercially available return roll guarding solutions that are economical and highly effective When The primary objective of any return roll guard is to help prevent injury to personnel considering which option is best for the application the mine operator should consider the following design features that increase the value and utility of the point guard including A 180 degree cage that provides complete pinch point protection and catches the roll if it breaks away from the brackets Slots that promote self cleaning in the bottom and help resist material buildup inside the guard UV inhibited plastic which will not corrode It will resist degradation from sunlight resist impact damage and resist premature wear from abrasion and it will not damage the belt on contact An integrated side shield totally encapsulating the roll that snaps into place easily and securely A slotted steel heavy gauge mounting bracket that retrofits to most return rolls without the need to remove the drop brackets Compatibility with the widest possible variety of return rolls and the ability to retrofit to most CEMA return idler bolt patterns Warning labels that clearly identify the hazard There are a variety of ways to enhance the safety of belt conveyors where return rolls are concerned The various types of guards available whether available commercially as a total solution or produced on site allow mine operators to choose the best available options in order to protect miners from the potential hazards that exist at the pinch point of return rolls Paul D Ross II is president of Douglas Manufacturing and holds a U S patent on the Guardian Premium Return Roll Guard For more information on Title 30 visit www msha gov 30CFR CFRINTRO htm Metsos new vibratory feeders the future of mining is here today Metso a global leader in the manufacture of process machinery has introduced a new line of vibratory feeders for the aggregates industry These feeders provide smooth quiet conveyance action They are available in variable or fixed rate These rugged heavy duty feeders have no belts to maintain and no springs to tune or air gaps to adjust They come with above below or side mounted drives and trough lengths and designs to meet your needs Metso also offers a quiet twin motor conversion kit that replaces old noisy worn out electromagnetic or natural frequency drives on existing vibratory feeders and screeners Contact us today for more information 1071 Industrial Parkway North Brunswick OH 44212 8008279237 3302731277 Fax 3302258740 www bestvibes com Expect results www pitandquarry com April 2010 PIT QUARRY 15