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Jan 17, 2016, 12:19 AM
Which shall it be, Passworthy?
Thread OP
Discussion

speed vs. torque: servo gearsets interchangeable?


In a family of servos with a torque version and a speed version, such as Futaba 9650 vs. 9257 or Align DS510 vs DS520, are the gearsets always interchangeable?

Dave
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Jan 19, 2016, 06:58 PM
Which shall it be, Passworthy?
Thread OP
I can tell you now that an Align DS520 gearset will fit and function in a DS510 servo. Whether it will survive or have other issues I cannot say. I have not installed it in an aircraft, only tested it with a spare rx.

The Align servos and also the ones used in the Curtis Youngblood Stingray 500 quad appear to be rebranded Savox units. The CY one is metal-geared, and its gears will *not* fit the Align DS510 because the mounting pins are a different diameter. I have not positively identified the source Savox models for these servos, but most likely variations of the SH-1350/1357. FYI.
Last edited by hancockdw; Jan 20, 2016 at 11:03 PM. Reason: wrong model numbers - 1250/57 are std size.
Jan 20, 2016, 09:56 PM
TigreJohn
Within the Hitec line, the gears sets between the 645 and 625 (5625/5645) units are interchangeable. One is torque, the other is speed.
Jan 20, 2016, 10:47 PM
Which shall it be, Passworthy?
Thread OP
Thanks, JJ. Good to know.

Part of my question is whether there are other differences between these family members. Are the motors different? Something in the electronics? Or is it really just the gear ratios?
Jan 21, 2016, 09:22 PM
TigreJohn
Its mostly the gear ratios. The motors for the four numbers are the same. The electronics differ from analog to digital.
Jan 22, 2016, 06:59 PM
Which shall it be, Passworthy?
Thread OP
Then it's a fair bet that if Hitec does it that way, most or all of the other brands follow the practice. Cool.

Dave


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