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BENDIX KING 4000918-7321 Servo ST873R

4000918-7321 Bendix King Trim Servo St873r Pn - Working As Removed

( Brand: Bendix King ), ( Manufacturer Part Number: 4000918-7321 ), ( Part Type: Servo ), ( Compatible Make: Avionics ), ( Country Of Origin: United States )

Review BENDIX KING Trim Servo Pn Working As Removed

The BendixKing Model 4000918-7321 Servo, specifically the ST873R variant, is a versatile and reliable actuator designed for various applications in the aviation industry. This servo is manufactured by Honeywell Aerospace, a leading supplier of advanced technology and engineered products for aerospace and defense industries.

The ST873R servo is a compact and lightweight actuator, weighing only 1.12 pounds (508 grams) with dimensions of 6.5 inches (165.1mm) long, 3.2 inches (81.3mm) wide, and 2.0 inches (50.8mm) high. Its compact size makes it an excellent choice for installations where space is limited.

The servo is engineered to deliver high precision and reliability, making it suitable for critical control functions in aircraft systems. It boasts a continuous torque rating of 14.3 ounces-inch (360 Nm), peak torque of 21 ounces-inch (535 Nm), and a speed range of 0.02 to 100 inches per second (0.05 to 254.4 mm/s).

The ST873R servo features a robust design with a rugged aluminum housing and a hardened steel output shaft, ensuring durability and resistance to harsh environmental conditions. It also incorporates a built-in thermal protection system to prevent overheating and ensure optimal performance.

This servo is designed with a wide operating voltage range of 10 to 36 volts DC, making it adaptable to various power sources and aircraft systems. It also comes equipped with a fail-safe feature, which returns the output shaft to a known position in the event of a power loss or failure.

The ST873R servo's output is available in several configurations, including continuous rotation, bi-directional rotation, and braked position hold. It can be controlled using analog voltage or pulse width modulation (PWM) signals. Additionally, it offers various communication interfaces, such as ARINC 429, MIL-STD-1553, and RS-232, ensuring compatibility with various aircraft systems and avionics.

In summary, the BendixKing Model 4000918-7321 Servo ST873R is a high-performance, compact, and reliable actuator designed for various applications in the aviation industry. It offers high precision, robust design, and versatile control features, making it a preferred choice for critical control functions in aircraft systems.

Buying the BendixKing Servo St873R (Model 4000918-7321): A Comprehensive Analysis

Introduction:

The BendixKing Servo St873R (Model 4000918-7321) is a popular servo used in various avionics applications. In this analysis, we will discuss the key features, advantages, disadvantages, and provide a final recommendation based on an unbiased evaluation.

Features:

1. Continuous torque output: 4.4 lb-in (54.7 Nm)

2. Operating voltage range: 4.5-6.0V

3. Operating temperature range: -40 F to 158 F (-40 C to 70 C)

4. Reversible operation

5. Quad-Bearing design for smooth operation

6. Integrated potentiometer for position feedback

Advantages:

1. High torque output: The St873R is capable of generating a significant amount of torque, making it suitable for demanding applications, such as controlling large flight surfaces.

2. Extended operating temperature range: This servo can operate in extreme temperatures, ensuring reliable performance in various environments.

3. Reversible operation: This feature is essential for applications that require servos to move in opposite directions at different times.

Disadvantages:

1. Size and weight: The St873R is larger and heavier than some competing servos, which may impact the overall weight and balance of the avionics system.

2. Cost: This servo is more expensive than some other options in the market.

Conclusion:

The BendixKing Servo St873R (Model 4000918-7321) offers several advantages, including high torque output, extended operating temperature range, and reversible operation. However, it also has some disadvantages, such as a larger size, weight, and higher cost compared to some alternatives.

Recommendation:

Based on the analysis, the BendixKing Servo St873R (Model 4000918-7321) is a suitable choice for applications that require a high torque servo with a wide operating temperature range and reversible operation. However, if size, weight, and cost are primary considerations, there may be competing options that could be more suitable. Ultimately, the decision to purchase the St873R depends on the specific requirements of the avionics system and the trade-offs between the advantages and disadvantages presented.

Details:

The Bendix King Trim Servo ST873R PN is a high-quality aviation part manufactured in the USA by.

part #: 40009187321 price

  • $950.00

specifications avionicavioni:

  • brand: Bendix King
  • mpn: 4000918-7321
  • part type: Servo
  • compatible make: Avionics
  • country of origin: United States

returns avionicavioni:

  • policy: No Returns

seller avionicavioni:

  • city: Winter Haven, Florida
  • rating: 100.0%
  • # reviews: 23

payments avionicavioni:

  • credit card: Visa
  • wallet: Google-pay
  • other

offer avionicavioni:

  • sold: 0
  • quantity: 1
  • started: December 27, 2025
  • availability: In Stock
  • best offers: True
  • options: Ship-to-home

shipping avionicavioni:

  • cost: $25.21
  • carrier: FedEx
  • type: Calculated
  • class: Economy
  • transit: 6-13 Days
  • service: FedEx Ground Economy

general avionicavioni:

  • Aviation Parts Accessories > Avionics > Other Avionics
  • condition: Used
part type: servo, compatible make: avionics, country of origin: united states,
category: auto parts > aviation parts accessories > avionics, sku: 15255875229725604,
Bendix King 4000918-7321 Is Similar To:
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1 offer $950.00 USD
  • Used. Offer #1 priced at $950.00 + $25.21 shipping estimate = $975.21* total. The Bendix King Trim Servo PN is a high-quality aviation part manufactured in the United States by Bendix King.+$25.21 shipping

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