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Servo horns / hooks

Products: 28
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Round aluminum servo horn - 20mm / 6mm

Aluminum servo horn with a diameter of 20 mm and the mounting hole 6 mm. It is circular in shape. Works with standard servos. The set also includes mounting screws.
Index: GRL-12538
Index: GRL-12538
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Delivery 100 pcs scheduled for 2023-04-10
Regular price €0.90 Price €0.90

Round aluminum servo horn Feetech FK-RP-001 - 20mm / 6mm

Aluminium servo horn made by company Feetech, diameter of 2 cm and a diameter of the mounting hole is 6 mm. It is in a circular shape. It works with  standard  servos. The...
Index: FTC-09198
Index: FTC-09198
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Regular price €2.90 Price €2.90

Round aluminum servo horn Feetech FK-AP-9 - 25mm / 6mm

Aluminium servo horn made by company Feetech, length of 2.5 cm and a diameter of the mounting hole is 6 mm. It is in a circular shape. It works with  standard  servos.
Index: FTC-09190
Index: FTC-09190
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Regular price €3.50 Price €3.50

Aluminum servo horn Feetech FK-AP-12 - 50mm / 6mm

Aluminium servo horn made by company Feetech, length of 5 cm and a diameter of the mounting hole is 6 mm. It has one screw for adjustment. It works with  standard...
Index: FTC-09192
Index: FTC-09192
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Regular price €4.90 Price €4.90

Aluminum servo horn 35mm / 6mm

Aluminium servo horn with length of 35 mm and a diameter of the mounting hole 6 mm. It has a shoulder in ranodom colour. Working with standard servos.
Index: GRL-12539
Index: GRL-12539
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Regular price €1.50 Price €1.50

Aluminum servo horn Feetech FK-AP-2 - 30mm / 6mm

Aluminium servo horn made by company Feetech, length of 3 cm and a diameter of the mounting hole is 6 mm. It comes in blue color. Working with standard  servos.
Index: FTC-09183
Index: FTC-09183
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Regular price €2.90 Price €2.90

Aluminum servo horn Feetech FK-AP-4 50mm / 6mm

Aluminium servo horn made by company Feetech, length of 5 cm and a diameter of the mounting hole is 6 mm. It has two shoulders, comes in color black. Working with  standard...
Index: FTC-09185
Index: FTC-09185
Waiting for delivery
Delivery 2 pcs scheduled for 2023-04-07
Regular price €2.50 Price €2.50

Aluminum servo mount Feetech FK-LS-001

Aluminum plate made by company Feetech in the form of the letter L, length 3.6 cm. Compatible in particular with standard servos.
Index: FTC-09206
Index: FTC-09206
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Regular price €2.50 Price €2.50

Aluminum servo mount Feetech FK-LS-001 - black

Aluminum plate made by company Feetech in the form of the letter L, length 3.6 cm. Compatible in particular with standard servos.
Index: FTC-12129
Index: FTC-12129
Waiting for delivery
Delivery 3 pcs scheduled for 2023-04-07
Regular price €2.50 Price €2.50

Aluminum servo horn Feetech FK-AP-3-BK - 35mm / 6mm

Aluminium servo horn made by company Feetech, length of 3.5 cm and a diameter of the mounting hole is 6 mm. There are two screws for adjustment. Working with  standard...
Index: FTC-09184
Index: FTC-09184
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Regular price €3.90 Price €3.90

Aluminum servo horn Feetech FK-AP-16 - 26mm / 6mm - black

Aluminium servo horn made by company Feetech, length of 2.6 cm and a diameter of the mounting hole is 6 mm. It has a shoulder in black. It works with  standard  servos.
Index: FTC-09195
Index: FTC-09195
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Regular price €2.90 Price €2.90

Aluminum servo horn Feetech FK-AP-14 - 32mm / 6mm

Aluminium servo horn made by company Feetech, length of 3.2 cm and a diameter of the mounting hole is 6 mm. It has a shoulder in copper. It works with  standard  servos....
Index: FTC-09193
Index: FTC-09193
Waiting for delivery
Delivery 10 pcs scheduled for 2023-04-07
Regular price €3.90 Price €3.90

Torque or lesson of physics

The measure of how "strong" the servo is, i.e. with which mechanical loads it can cope, is torque in mechanics. Without going into vector complexities, we can assume that in the case of a drive shaft, the so-called torque is the product of the arm length and the force exerted on the end of the arm by our drive (motor or servo). Therefore the unit used for stepper motors or DC motors (especially those with built-in gears) is the newton meter - denoted by the unit Nm. For servos, it is customary to use a slightly different unit for torque, i.e. kg*cm (1 kg*cm = 0.0981 Nm) - in the case of RC models or small mechanisms, this conversion turns out to be much more intuitive. In addition to determining the power of the drives themselves, you must also select the appropriate servo cranks that will be able to transmit the set forces without excessive overload.

Choosing the right horn for your application

It is obvious that the longer the arm that transmits the drive, the more torque will be required to perform the job. Therefore, the mechanical strength becomes particularly important for longer armatures. Metal servo arms are irreplaceable in this case, not only because of the lack of deformation (which may occur in longer plastic servo arms), but also due to solid execution of holes which are used for connecting to cables or other elements of the mechanism. The basic parameters are the length of the arm and the number of arms - sometimes a single-arm type is sufficient, but for other applications where you need to operate two cables moving in opposite directions, you will need a double-ended type. Some orifice plates are shaped like a round disc with several mounting holes. Such elements are especially suitable for servos with unlimited rotations (servos 360 degrees, i.e. designed for continuous operation).

Servos at Botland online store

In our offer you will find a wide selection of aluminum orbs, compatible with standard type servos. The 25T mark, visible on the upper surfaces of the eartags, informs about the design of the servo drive shaft - it is a knurled shaft with 25 teeth and mounting hole diameter of 3 mm. We have both straight orbs of various lengths, with one or two arms, as well as circular (disk) or even custom profiled orbs (e.g. Feetech FK-AP-10). We offer double-armed spanners in symmetrical (e.g. FK-AP-4) or asymmetrical (FK-AP-15) versions. In this category you will also find a range of metal holders, allowing you to build "gimbal" type mechanisms.