Sokhi Heli-Wom Gears Private Ltd. Offers Helical Gearboxes with Spiral Bevel Gears. Sokhi Heli-Wom Gears Private Ltd. Is an ISO 9001:2000 certified company. The Helical Gearboxes with Spiral Bevel Gears are available in various types like Horizontal or Vertical, Right angle or Parallel foot mounted or Shaft mounted gear units. The gear units are fully metric and are suitable for most application in both horizontal and vertical drives. Ground helical gears together with spiral bevel gears lapped in pairs; ensure high standards of accuracy, surface finish and quiet running characteristic. High quality alloy case hardening material provide long life wear resistance and fatigue strength. Helical gears are fitted in parallel shaft units whilst units with shaft at right angle incorporate spiral bevel and helical gears.