BLDC FDB SP2

FDB (Fluid Dynamic Bearing) motors are high-precision brushless motors engineered to achieve the high rotational accuracy and reliability demanded by the hard disk drive market. They operate without mechanical contact, using the hydrodynamic pressure of oil sealed between the shaft and bearing, generated by hydrodynamic grooves on both the radial and thrust surfaces. This design delivers rotational precision superior to conventional ball bearings, effectively minimizing non-repeatable run-out (NRRO) to ensure quiet operation and long-term reliability.
Our lineup also includes low-profile models, supporting device miniaturization and space-saving designs.

Features

Fluid dynamic bearing technology
Low noise
sound power overall max. 20 dB(A) re 1 pW Low vibration
Low NRRO < 40 nm
Wobble error < 3‘‘
Run out rotor axial: < 10 µm radial: < 10 µm
Static imbalance < 35 mg ∙ cm

Mounting position : arbitrary
Bearing system : FDB (Fluid Dynamic Bearing)
Torque constant kt : 6.6 mN ∙ m/A
Motor weight : max. 45 g
Polar rotor inertia : 1.4 ∙ 10-6 kg ∙ m2
Temperature range :
operating : -40 °C to +105 °C**
non operating : -40 °C to +105 °C**
Direction of rotation : CCW only
Number of poles/slot : 12/9
Speed range : 1000 - 12000 rpm**
Recommended load : < 100 g**

** Operating conditions and load depending on specific application requirements.
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Rated Voltage
[V]

Rated Speed
[rpm]

Power at
rated speed
[W]

Friction Torque at
rated speed
[mN・m]

Current at rated Speed
(without load)
[A]

5 3600 0.45 1.19 0.18

Z.Nr.

1224-888-00052

Memo

*The specification for Rated Voltage and Nominal Speed are just example values. These parameters are depending on customer requirements and electronics. The Speed Range is also depending on the rotor mass and center of gravity.
Integrated Drive Electro.: No
Planetary Gearbox: No
Sensorless Operation: Yes
Associated Data
- PDF product catalog

Rated Voltage [V]	Rated Speed [rpm]	Power at rated speed [W]	Friction Torque at rated speed [mN・m]	Current at rated Speed (without load) [A]
5	3600	0.45	1.19	0.18

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