Profile: Challenge Power Transmission PLC is a manufacturer and distributor of power transmission components & the complete range of Challenge branded products. Our adapters are ideal for pilot bored components, and it's extended range includes keyed and keyless versions. Our torque limiters are used to prevent machine damage and eliminate downtime. They work with plate wheel sprockets, gears, sheaves, or flange plates. Our troughing rollers are made from seamless steel tubing with machined seat for end covers. They are used for permanent lubrication. Our Milock pulleys and bushes are ideal for multi-speed drives, and are manufactured from high grade iron and balanced to Q6.3.