Friction Torque Limiters

The table lists 10 sizes with trip torque from 2.94 to 1087.8 N·m, bores up to Ø65 mm. The slip torque is set on the machine within each size's range; other bores and combined sprocket / pulley / coupling versions are made to drawing.

RTL friction torque limiters use disc-spring pressure on friction plates: RTL50 / 65 / 89 adjust by a single nut, RTL127 / 178 by three bolts; tolerant of high temperatures and widely used in conveying, packaging and machine-tool drives needing overload protection. Torque range 2.94–1087.8 N·m, 5 sizes × two stages. The RTL is the workhorse friction torque limiter for heavy drives with frequent overloads: disc springs press multi-plate friction faces, the slip torque is widely adjustable (one nut on RTL50/65/89, three bolts on RTL127/178) and it tolerates heat. Mount a sprocket, pulley or gear on the centre member and it slips on jams instead of breaking the drive.

Yes. Everything on this page is made to drawing, and the table is only the standard-size subset of the catalogue. Minimum order quantity is one piece — we routinely make single replacement parts for OEMs whose original supplier has discontinued the item. Send a DWG, STEP or PDF drawing (or a sample part): you get a formal quotation within 24 hours after the information is complete, and the first article ships within 30 days of drawing approval, with inspection records.

Send: the torque at which the drive should slip (or motor power and speed so we can calculate it), bore diameters and keyways, speed, duty (how often overloads occur), space available, operating temperature, and whether you want a sprocket, pulley, gear or coupling built onto the limiter. We will confirm size and pre-set the trip torque before shipping.