13 April 2026 Continued.pdf
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- Attached to
- Azimuth Gearbox Assembly Procurement
- Solicitation number
- FA8507-26-R-B002
- Issued by
-
Department of the Air Force
About this file
This file is a Questions and Answers document dated 13 April 2026 addressing inquiries related to an Azimuth Gearbox procurement.
Question 2 addresses the motor load requirements for the gearbox when unloaded. The response specifies that the motor interfacing to the Azimuth Gearbox is a Powertec Industries Motors unit with Part Number F259V1J1N0A3910, rated at 55 HP operating at 3600 RPM. Question 3 clarifies the measurement units for gearbox backlash specifications, confirming that measurements are taken in inches using a dial-type device rather than arc seconds. The response provides detailed methodology for backlash inspection, including mounting an anti-rotation bar (part #CT-14991) to the gearbox, positioning 0.0001-inch indicators on the output pinion tooth and anti-rotation bar, inserting a backlash gauge shaft (#8GD-W180DD) into the input coupling, and applying 0-150 foot-pounds of torque in a clockwise direction until 5-10 foot-pounds of resistance is achieved and all gears are fully engaged. The document includes photographic illustrations demonstrating the backlash measurement setup and dial gauge positioning for recording the backlash reading.
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13 April 2026 Continued
For question 2, I understand that the gearbox is not under load but what does the gear box present to the motor as a load? Or another way of stating this, how many horsepower is required to drive the gearbox when it is unloaded?
A: The motor that interfaces to the Azimuth Gear Box is a Powertec Industries Motors, PN:
F259V1J1N0A3910, Motor, 55 HP, 3600 RPM
For Question 3, I am a little confused with the units. Are those arc seconds? If so, those would be very small. And I am assuming those specifications are for the gearbox after break-in?
A:Pictures are worth a thousand words, but measurement is in inches using a dial type device. See below pictures on what method is currently used to measure backlash:
| 2026-04-13T18:08:32-0400 | |
| JONES.BRANDON.A.1512993709 |
File details come from the government source that posted it. Updated .