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7603 Series Ball Screw Support Bearings With Double Seals

The 7603 series ball screw support bearings with double seals are key matching components specially designed for ball screw transmission systems and play an important role in the field of mechanical transmission. This type of bearing has an ingenious structural design and mainly consists of an inner ring, an outer ring, rolling elements (usually balls), and a cage. Its characteristic lies in its double seal structure.
The inner and outer rings are made of high-quality steel and undergo precision machining, possessing excellent dimensional accuracy and surface quality to ensure accurate mating with the ball screw and related components. The rolling elements are evenly distributed on the raceways between the inner and outer rings and move orderly under the guidance of the cage to achieve efficient force transmission and relative rotation. The double seal design is a highlight of this series of bearings. It is generally composed of a combination of a contact rubber seal ring and a non-contact labyrinth seal. The contact seal ring can effectively block external contaminants such as dust, moisture, and debris from entering the interior of the bearing and prevent the leakage of grease, maintaining a good lubrication state. The non-contact labyrinth seal further enhances the sealing effect. By utilizing its tortuous channel structure, even in complex and harsh working environments, it can minimize the intrusion of impurities and extend the service life of the bearing.

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	Type	Main dimensions	Rated load	Rated speed
	760305TN1 2RZ	25	62	17	28.5	41.5	9000.0
	760304TN1 2RZ	20	52	15	24.5	32.0	11000.0

Type

Main dimensions

Rated load

Rated speed

Dynamics

Static

Speed limit

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d[mm]

D[mm]

B[mm]

C[kN]

C₀[kN]

[r/min]

760305TN1 2RZ

760304TN1 2RZ

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Excellent sealing performance: The double seal structure provides a reliable protective barrier for the bearing, enabling it to work stably in dusty, humid, or even corrosive media environments. For example, in woodworking machinery, where wood dust is pervasive, this series of bearings, with its outstanding sealing, prevents the erosion of the bearing interior by the dust, ensures the smooth transmission of the ball screw, and reduces equipment downtime due to failures.
High-precision retention ability: Every aspect from raw material selection to manufacturing process is strictly controlled, giving the bearing extremely small radial clearance and axial displacement and enabling it to maintain high-precision operation for a long time. In precision CNC machining equipment, the 7603 series bearings, as the support for the ball screw, ensure the precise positioning of the cutting tool during the machining process, making the machined parts reach extremely high standards in terms of dimensional accuracy and surface quality.
High load-carrying capacity: Reasonable ball size, quantity, and raceway design endow it with strong radial and axial load-carrying capacities. In the linear motion units of industrial automation equipment, such as the handling manipulators of automated production lines, the bearings need to bear the forces generated by the frequent start-stop, acceleration, and deceleration of the robotic arm. The 7603 series can provide stable support and ensure the reliable operation of the equipment.
Long life and low maintenance: Good sealing reduces the damage to the bearing caused by external impurities, a stable lubrication environment, and a reliable structural design all contribute to the long-life characteristics of the bearing. At the same time, due to the good sealing effect, the grease is not easily lost. During the equipment's service life, only a few maintenance times are required, reducing operating costs. In the packaging machinery field, where the equipment operates continuously for a long time, the long-life and low-maintenance features of this series of bearings make them highly favored, reducing the shutdown and maintenance time of the production line and improving production efficiency.

Application

The bearings can be used in the following industries

CNC machine tools: As the support for the ball screw, it ensures the accurate movement of the machine tool axes. Whether it is milling, turning, or drilling, it can ensure the precise positioning of the cutting tool and achieve the precision machining of complex parts. It is an indispensable part of modern CNC machine tools.
Automated production lines: In the linear motion mechanisms of automated handling equipment and conveyor equipment, it provides stable support and precise movement guarantee for robotic arms, conveyor belts, etc., adapts to frequent start-stop and high-speed operation, ensures the efficient and stable operation of the production line, and improves production efficiency.
Industrial robots: The joints and each motion axis of industrial robots cannot do without ball screw transmission. The 7603 series bearings play a crucial role here, supporting robots to flexibly and precisely complete various complex tasks, such as welding, assembling, spraying, etc., enhancing the quality and reliability of robot operations.
Precision measurement instruments: In precision measurement equipment such as coordinate measuring machines and laser interferometers, the high-precision characteristics of the bearings are fully demonstrated, ensuring the accurate movement of the measurement platform and measurement head and ensuring the accuracy of measurement data, providing a reliable basis for scientific research and product quality inspection.
Medical devices: Some high-end medical devices, such as the fine-tuning mechanism of surgical microscopes and the lifting device of dental treatment chairs, require high-precision, stable and reliable transmission components. The 7603 series bearings, with their excellent characteristics, meet these special requirements, facilitating the precise operation of medical devices and providing guarantee for medical services.