Load Chain : Alloy Steel smooth welded short link chain to Gr.80-IS: 6216. Load Chain Wheel : Made of MIC /Cast steel to IS: 1030 Gear & Pinions : Made of alloy steel, case hardened to a high surface hardness , teeth generated ( hob cut ) to perfect involutes, corrected for high bending strength & low wear. Bearing : Extra – heavy ball bearings are provided for load carrying spindle. Frame : Build of steel plates. Load Brake : Automatic mechanical type, comprising screw & brake discs and ratchet and pawl, capable of instantaneously & effectively arresting and sustaining load in all working positions. Hooks : Forged Steel Shank Hooks to IS:15560 High mechanical efficiency & very long life; This is achieved mainly by proper correction & accurate mating of the gearteeth and very smooth & high hard surface of the teeth, use of extra heavy ball bearing for support of high grade alloy steel load chain & cast steel load chain wheel, and perfect matching of chain wheel with the respective chains. SPECIAL FEATURES - Very high lifting speed- so very quick ( manufacturing / assembly / erection / loading & unloading operations. - High Mechanical efficiency & smoothness in operation – so relatively less manual effort required. - Robust in construction & and very long working life.