EXTEX manufactures the highest performing flight critical PMA parts for MD Helicopters. Our life limited and critical aftermarket replacement parts excel under the most demanding conditions. Since 1973, Heli-Mart, Inc. set out to provide exceptional support and service for helicopter operators worldwide. More than 40 years later, we continue our on-going mission to provide a superior level of customer service, getting you the helicopter parts you need at the most critical of times. Heli-Mart keeps its customers up and running, housing an extensive on-shelf inventory of MD Helicopter, Bell Helicopter, Airbus Helicopters (formerly Eurocopter) and Sikorsky (formerly Schweizer) parts. Our ability to ship parts same-day, worldwide, ensures same or next day delivery on most orders. Heli-Mart and its wholly owned subsidiary, California Aero Components (CAC), are headquartered in Irvine, California—just off the runway of Orange County’s John Wayne Airport (SNA). CAC is FAA Approved (CRS #Y5CR165Y) and EASA Certificated (EASA 145.5247) to overhaul and repair MD500/600 Series and Schweizer Helicopter components. Learn more here >

Drive Train Components

EXTEX provides an MD Helicopter main rotor driveshaft that offers superior performance with extended service life, resulting in unequaled PMA eligibility, increased readiness, and cost-effectiveness for the MDHI series aircraft. Our maintenance-free tail rotor coupling has been the first choice for helicopter applications where failure is not an option.
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MD500 Helicopter Bearings

We offer a variety of bearings for the MD500 Transmission & Tail Rotor Assembly.
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