The core difference between the 31 series and 32 series single row tapered roller bearings lies in the size of the contact angle. The 31 series typically has a large contact angle of 27 ° -30 °, while the 32 series has a contact angle of 10 ° -19 °. The following is a specific analysis of both:
Definition and function of contact angle:
Contact angle is a key parameter of tapered roller bearings, referring to the angle of the outer race raceway, which directly affects the axial load capacity of the bearing. The larger the angle, the stronger the axial load capacity.
31 series tapered roller bearings:
Contact angle range: 27 ° -30 ° (large cone angle design).
.Performance characteristics:
The axial load capacity has been significantly improved, making it suitable for scenarios with large axial loads.
. Enhanced load-bearing capacity to cope with more complex working conditions.Typical application: Components such as small gear shafts in automotive differential devices that require high axial load-bearing capacity.
.2 series tapered roller bearings (taking 32 series as an example):
Contact angle range: 10 ° -19 ° (ordinary taper angle design).
.Performance characteristics:
The axial load capacity is relatively weak, but the radial load capacity is balanced.
.Suitable for scenarios with small axial loads and mainly radial loads. Typical applications: General machinery, transmission systems, and other conventional working conditions.
Series division basis:
Cone roller bearings are divided into ordinary cone angle, medium cone angle, and large cone angle types according to the size of the contact angle.
. The 31 series belongs to the large cone angle type, while the 32 series belongs to the ordinary cone angle type. The contact angle code is reflected in the model: the medium cone angle bearing is marked as C, and the large cone angle bearing is marked as D (the 31 series is not clearly marked with a code, but the contact angle range conforms to the characteristics of the large cone angle).