Essential Power Transmission Pvt. Ltd. Offers Helical and Bevel Gear Unit [RP Series]. Essential Power Transmission Pvt. Ltd. Is an ISO 9001:2008 certified company. The company manufactures Standard and Customized Industrial Gear Unit. .The Helical and Bevel Gear Unit are designed and made on the basis of advanced scientific computer aided design and study of gear tooth geometry and shaft deflection. For maximum gear efficiency the product is carburized, hardened, tempered and subsequently flank ground an accuracy.