Servo Shaft Coupler Schematic

1/8”

HSA125

$12.99

5/32”

HSA156

$12.99

1/4”

HSA250

$12.99

3/16”

HSA187

$12.99

5/16”

HSA312

$12.99

3/8”

HSA375

$12.99

4mm

HSA4MM

$12.99

5mm

HSA5MM

$12.99

6mm

HSA6MM

$12.99

Bore

Part #

Price

Status

Qty

Buy

Features
• Handles over 1,500 oz-in. of torque without slipping
• 6061 T6 Aluminum
• Fits right onto servo spline
• Offered in both Hitec (24T spline) & Futaba (25T spline)

Pictures below show included hardware for the various couplers.

A Servo to Shaft Coupler offers a simple and solid way to attach a shaft in line with the output spline of a servo. Each servo to shaft coupler is machined from 6061 T6 aluminum with a broached Acetyl insert that snugly fits over the servo spline. Once installed onto the servo the coupler is then fastened to the servo using a servo screw (details on servo screw). The shaft can then be slid into place and clamped using the supplied 5-40 socket head screw (requires a 5/64” hex key). Offered in 24T (C1 Hitec) and 25T (3F Futaba) splines. Patented

Servo Shaft Coupler on servo
Servo Shaft Couplers inline with servo
Servo Shaft Couplers in a line
Patented

1/8”

FSA125

$12.99

5/32”

FSA156

$12.99

1/4”

FSA250

$12.99

3/16”

FSA187

$12.99

5/16”

FSA312

$12.99

3/8”

FSA375

$12.99

4mm

FSA4MM

$12.99

5mm

FSA5MM

$12.99

6mm

FSA6MM

$12.99

Bore

Part #

Price

Status

Qty

Buy

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Fig. 1

Fig. 2

Fig. 3

C1 Hitec Spline2

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Hitec C1 Standard Spline (24T)

Futaba 3F Spline

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Futaba 3F Standard Spline (25T)

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Servo-Shaft-Couplers-Included-hardware-Group

HSA250
HSA312
HSA375
HSA6mm

FSA250
FSA312
FSA375
FSA6mm

HSA187
HSA5mm

 

HSA125
HSA156
HSA4mm

FSA125
FSA156
FSA187
FSA4mm
FSA5mm

No servo screws included. Stock servo screw supplied with Hitec or Futaba servo should be used.
Coarse thread micro head screw (for plastic gear servo) is included. Will not fit metal gear servo as no machine screw is supplied for this bore size.
Coarse thread micro head screw (for plastic gear servo) is included and a M2.6 x 8mm screw (for metal gear servo) are included.

Hardware key:

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Servo to Shaft Couplers
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