Handwheels |  Chainwheels |  Locking Device DT/SRD/BG  | Locking Device SD Handwheels are manufactured in both cast iron,  fabricated carbon and stainless steel from 6 inch through 48 inch diameters. The fabricated handwheels are manufactured to both recessed and flat designs. Locking devices are manufactured for all of DynaTorque's gear operators as well as many other makes of gear operators. DynaTorque's Field Mountable Locking Device® is designed to prevent inadvertent handwheel rotation in critical service valve applications. DynaTorque chainwheel kits consist of: Purchased chainwheels from internationally known chainwheel manufactures. (Babbit, Rotohammer, etc) Fabricated chainwheel adapters that couple the chainwheel directly to the input shaft of your DynaTorque actuator. All necessary hardware Caution: DynaTorque recommends the use of chainwheel tethers in all chainwheel applications.  DynatTorque does not recommend mounting chainwheels to the rims of dish style handwheels.