Futaba S3115 Micro Precision Servo — compact micro servo for small electric models  [S3115]

Futaba S3115 Micro Precision Servo
Price:
CAD$45.15
Brand:
Futaba
Model:
S3115
Please kindly input your name and email address, we will inform you once we have the restocking.
Or you may find similar product under the
category
Write a review

Futaba S3115: compact servo overview

The Futaba S3115 is a micro-size precision servo made for RC electric models where minimal weight and tight installation space matter. Its compact case and nylon gear train offer controlled motion for small control surfaces and cyclic inputs on micro aircraft. For installation, position the servo in the recommended bay, attach the supplied horn that matches your linkage, and route the lead neatly to the receiver.

Mind the electrical and mechanical limits when using this servo. It is intended for battery-powered electric models and can draw higher current under load; ensure your battery and BEC/ESC can supply peak current. Avoid high-torque uses, and do not exceed recommended supply voltage to preserve service life.

Packing includes

  • Futaba S3115 Micro Precision Servo - 1 pcs
  • 1" (25.4mm) 4-arm servo horn, installed - 1 pcs
  • 1.5" (39mm) 4-arm servo horn - 1 pcs
  • 1.75" (45mm) straight servo horn - 1 pcs
  • 1.4" (35mm) diameter round servo horn - 1 pcs
  • Eyelets - 2 pcs
  • Rubber grommets - 2 pcs
  • 2x12mm washer head self-threading screws (Phillips) - 2 pcs

Specifications

  • Item Futaba S3115 Micro Precision Servo
  • Material Nylon gear train
  • Model Number S3115
  • Compatibility Small electric planes and micro helicopters
  • Torque (4.8V) 39 oz-in (2.8 kg/cm)
  • Speed (4.8V) 0.15 sec/60
  • Dimensions 1.1 x 0.5 x 1.2" (28 x 13 x 30 mm)
  • Weight 0.60 oz (17 g)
  • Lead Length 6.5" (165 mm)

Use the included horns and mounting hardware, observe the recommended operating voltage, and avoid installing this servo in gas or high-power engine models, large gliders, or any airframe that needs continuous high torque; replacement gears are available as part number FUTM3404.

How should I mount the S3115 in a micro airframe?

Secure the servo in the recommended bay using the supplied rubber grommets and screws, fit the correct horn for your linkage, and ensure the lead is routed to avoid sharp bends or interference. Tighten screws progressively to avoid warping the case.

Can I power the S3115 directly from my LiPo pack during installation trials?

You can, but verify your battery and BEC/ESC can meet peak current draw during servo movement. Monitor voltage under load to prevent overcurrent or undervoltage conditions that could affect setup and range testing.

Which servo horn is shipped installed and what extras come in the pack?

The 1" (25.4mm) 4-arm servo horn is preinstalled. The box also includes a 1.5" 4-arm horn, a 1.75" straight horn, a 1.4" round horn, eyelets, grommets, and screws for mounting.

Is the S3115 appropriate for gas or high-power engine models?

No. The S3115 is not designed for gas or high-power engine applications or any setup demanding continuous high torque; using it in such conditions will shorten service life.

How do I proceed if the internal gears fail?

Order the replacement gear set FUTM3404 and follow correct disassembly steps. Use the supplied horns and avoid overloading the servo to reduce the chance of gear damage.

Copyright © 2008-2026 rcjaz.ca All rights reserved