How to choose bearings suitable for parallel axis F57-NA40-1.1KW gear reducer

The following is a selection guide for selecting bearings suitable for parallel axis F57-NA40-1.1KW gear reducers, combined with load characteristics, installation space, and operating requirements for comprehensive explanation:
1、 Core parameters for bearing selection

Load characteristic analysis

Radial load: Parallel axis gear reducers mainly bear radial loads, and deep groove ball bearings (6000 series) or cylindrical roller bearings (NU/N series) are preferred.

Axial load: If there is an axial force component (such as helical gear transmission), angular contact ball bearings (7200 series) or tapered roller bearings (30000 series) should be selected.

Speed matching

The 1.1KW motor corresponds to a speed of approximately 1400rpm (4-pole motor), and bearings with a maximum speed of ≥ 3000rpm (such as deep groove ball bearings) need to be selected.

2、 Installation space adaptation

Matching of shaft diameter and bearing seat

According to the output shaft diameter of F57-NA40 reducer (usually 40mm), choose a standard bearing with an inner diameter of 40mm (such as 6208 deep groove ball bearing).

When the radial space is limited, narrow series bearings (such as 618 series) or thin-walled deep groove ball bearings can be selected.

Axial positioning requirements

If bidirectional axial positioning is required, it is recommended to use angular contact ball bearings paired back-to-back (DB configuration) or tapered roller bearings.

3、 Optimization of adaptability to working conditions

Lubrication and Sealing

When the internal lubrication conditions of the reducer are good, open type bearings (such as 6208ZZ with dust cover) are preferred.

Contact sealed bearings (such as 6208-2RS) should be selected for dusty environments.

Economic considerations

When purchasing in bulk, priority should be given to universal models (such as 6208 deep groove ball bearings), which have a cost 30% -50% lower than tapered roller bearings.

4、 Selection verification process

Load verification
Calculate the equivalent dynamic load (P), requiring the rated dynamic load (Cr) of the bearing to be ≥ 1.2 times P.

Extreme speed verification
The maximum bearing speed (nlim) should be ≥ 1.5 times the actual speed (2100rpm).