4 & 6 Idler Approach-Retreat NTEP Certified Belt Scales

Models NAR 4 and 6 idler Belt Scales are designed for applications on conveyor belts of 18 to 96 inches wide, operating at belt speeds between 100 and 1000 ft/min, under loading of 34 to 340 lb/ft, at flow rates of 102 to 10,200 T/hr. The Model NAR family uses the same “graded sensitivity” weighbridge that has been used by THAYER for commercial applications for over 30 years. It is particularly well suited for applications involving high belt speeds (>600 fpm) and steep inclines (>12 deg.).

THAYER 4 or 6 Idler NAR Belt Scale Features

• Depth of suspension stringers are 4, 6 or 8 inches to meet deflection criterion.
• Mass counterbalance weights are used to counterbalance the dead load of the main frame weigh idlers and conveyor belt. The use of the mass counterbalance permits maximum utilization of the load cell.
• Special pentagonal (5-sided) tubular stringers employed to meet combination needs of tensional/bending rigidity and low material buildup area.
• Patented rocking-flexure primary pivot is wear-less and uniquely accommodates a distorting foundation (as is characteristic of typical conveyor structures).
• Isolation lever suspended by stainless steel pre-stressed aircraft cable protects load cell from extraneous forces that arise from distorting foundation and serves to provide means to optimize load cell utilization factor.
• Patented calibration method utilizing a controlled belt travel interval makes one-shot adjustment possible.
• Unique test weight system eliminates need for test chains.
• Accurate belt speed measurement uses precision wheel and high resolution pulser