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Crossed Roller Bearings Series RA

It has extremely high rotational accuracy, which can ensure the high - precision positioning and stable rotation of the equipment during operation. At the same time, it has a strong load - bearing capacity and can adapt to various complex working load conditions. In addition, this series of bearings also has good rigidity and impact - resistance performance. It can maintain stable performance under high loads and high speeds, reduce vibration and noise, and prolong the service life of the equipment.

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	Type	Main dimensions			Rated load		Rated speed
					Dynamics	Static	Speed limit
Mail		d[mm]	D[mm]	B[mm]	C[kN]	C₀[kN]	[r/min]
	RA20013	200	226	13	25.8	54.7	-
	RA19013	190	216	13	24.9	51.5	-
	RA18013	180	206	13	24.5	49.8	-
	RA17013	170	196	13	23.5	46.5	-
	RA16013	160	186	13	23.3	44.9	-
	RA15008	150	166	8	8.82	20.6	-
	RA14008	140	156	8	8.33	19.1	-
	RA13008	130	146	8	7.94	17.6	-
	RA12008	120	136	8	7.84	16.5	-
	RA11008	110	126	8	7.45	15.0	-
	RA10008	100	116	8	7.15	13.9	-
	RA9008	90	106	8	6.76	12.4	-
	RA8008	80	96	8	6.37	11.3	-
	RA7008	70	86	8	5.98	9.8	-
	RA6008	60	76	8	5.68	8.68	-
	RA5008	50	66	8	5.1	7.19	-

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Structural Analysis

Roller Arrangement: The rollers inside are precisely arranged in a 90° mutually perpendicular crossed pattern. This layout breaks the convention and endows the bearing with the powerful ability to handle radial, axial loads, and overturning moments simultaneously, greatly expanding its application scenarios.
Isolation Elements: Spacer blocks or spacer rings are skillfully placed between adjacent rollers. This design detail is of great significance. It not only eliminates the risk of jamming caused by the collision and friction of the rollers during operation but also ensures the smooth and stable operation of the entire bearing system, prolonging its service life.
Inner and Outer Ring Design: It adopts an innovative split - type structure. This characteristic brings great convenience to the installation process. Operators can flexibly adjust the clearance according to the on - site working conditions and apply pre - tightening force as needed, significantly improving the rigidity and accuracy performance of the bearing to meet diverse usage requirements.

Performance Highlights

Rotational Accuracy: It reaches the top level in the industry. With extremely small radial runout and axial displacement errors, it ensures that the equipment can achieve high - precision positioning throughout the operation process. Whether it is high - speed operation or low - speed fine - tuning, it can be accurate without error.
Load - Bearing Capacity: It has super strong load - bearing toughness. Facing complex and changeable working loads - from the light - load, high - frequency working conditions of precision instruments to the heavy - load, low - frequency scenarios of large machinery, it can handle them with ease and stably bear the loads.
Rigidity and Impact Resistance: It exhibits excellent rigidity characteristics. Under high - load impacts, such as the instantaneous start of heavy machinery and the high - speed operation of aero - engines, the bearing structure remains stable without deformation, effectively resisting the impact, reducing vibration and noise, creating a quiet and stable operating environment for the equipment, and significantly prolonging the overall life of the equipment.

Application

The bearings can be used in the following industries

Semiconductor Manufacturing:In core links such as lithography machines and wafer handling equipment, the high - precision positioning function of the bearing meets the nanometer - level precision requirements of the semiconductor process and satisfies the strict standards of the ultra - clean environment, helping chip manufacturing to move towards higher precision.
Precision Machine Tools:Used in key components such as spindles and rotary tables, it empowers the machining accuracy upgrade of machine tools. With excellent load - bearing and rotational accuracy, it ensures the accurate cutting trajectory of the tool and the excellent surface quality of the processed workpiece, greatly increasing the product value.
Industrial Robots:It is suitable for joint parts and is a key link for robots to achieve flexible and precise movements. It enables robots to quickly and precisely position and move in complex tasks, such as precision assembly and high - risk environment exploration, unlocking more application potentials.
Aerospace:It is applied to key parts such as the attitude control mechanism of aircraft and aero - engines. Under extreme conditions such as high altitude, high speed, and low temperature, with its reliability and high - precision characteristics, it ensures flight safety and promotes aerospace technology to climb to higher peaks.