Fenner RT4902 heavy-duty straight arm round belt idler tensioner for maintaining tension in round belt drives. Robust straight arm construction ensures reliable performance in industrial applications.

T-Max medium duty and heavy duty rotary tensioners are our most rugged T-Max tensioners. The heavy duty construction pairs well with heavy load applications. The torsion spring is designed to absorb momentary overloads and reduce vibration. The medium duty RT3000 series is best suited for single or double groove v-belt drives using A/13 (4L), SPA, B/17 (5L), SPB or 3V and 5V narrow wedge belts. RT4100 and RT4900 series tensioners are designed for use on drives with two to four B/17, SPB or 5V narrow wedge belts or one to two C/22 or SPC cross section belts. Constructed from high-quality materials for proven durability. Maximum load no more than 1-1/2 in distance from front face of tensioner arm to centerline of idler. Requires a fixed head, hook style spanner wrench for tensioning (supplied with unit).