SX Series Crossed Roller Bearings

The SX series crossed roller bearings are one of the basic types of crossed roller bearings. The outer ring is split into two halves, while the inner ring features an integral design. Due to their thin‑walled construction, both the inner and outer rings require flanges and supporting brackets for secure mounting. The SX series is particularly suited for applications where high rotational accuracy of the inner ring is required, such as the rotary stages of precision worktables.

The SX series crossed roller bearings are one of the basic types of crossed roller bearings. The outer ring is split into two halves, while the inner ring features an integral design. Due to their thin‑walled construction, both the inner and outer rings require flanges and mounting brackets for secure fixation. The SX series is particularly suited for applications where high rotational accuracy of the inner ring is required, such as the rotary stages of precision worktables.

I. Precautions for Installing SX-Series Crossed Roller Bearings

1. Use of Lubricating Oil

During installation, applying grease inside the housing of SX-series crossed roller bearings can provide lubrication. However, it is important to avoid over‑greasing: excessive grease can accumulate in the bearing housing and, as the bearing rotates, may be forced into the bearing interior. Therefore, minimize the amount of grease applied and ensure that no excess grease remains in the housing.

2. Dynamic and Static Balancing

Dynamic and static balancing can be performed prior to bearing installation because, once the SX-series crossed roller bearings have been mounted, attempting to balance them afterward may allow metal debris generated during equipment operation to enter the bearing interior, thereby compromising its normal operation.

3. Specialized assembly molds

When installing SX-series crossed roller bearings—components known for their high precision—specialized assembly jigs should be used, as improper installation can easily damage the bearing raceways. During installation, avoid striking the bearing; when press-fitting onto the shaft, apply force only to the inner ring, and when press-fitting onto the outer ring, apply force only to the outer ring.

4. Rotational Flexibility

When properly installed, SX-series crossed roller bearings should rotate smoothly with no noticeable drag. If a distinct “rustling” sound is heard during rotation, it may indicate excessive shaft tolerance or poor shaft roundness. Conversely, if the bearing exhibits significant stiffness or resistance to rotation, the tolerance specifications should be tightened.

II. Methods for Lubrication and Maintenance of SX-Series Crossed-Roller Bearings

1. Oil-bath lubrication method

Oil-bath lubrication is a commonly used lubrication method for thin‑walled crossed roller bearings and is particularly suitable for SX‑series crossed roller bearings. In this method, the bearing is partially immersed in an oil reservoir; as the bearing rotates, the lubricant is carried upward by the rotating components and then flows back into the reservoir.

2. Circulating Oil Lubrication Method

The circulating oil lubrication method uses an oil pump to deliver filtered oil to the bearing components; after passing through the bearings, the lubricating oil is filtered and cooled before being recirculated. The circulating oil effectively removes heat from the bearings, thereby reducing their temperature; consequently, this method is commonly employed in bearing assemblies operating at relatively high speeds.

3. Oil-Drip Lubrication Method

The oil‑drip lubrication method involves dispensing a measured amount of lubricant into the bearing, with drops applied every 2 to 7 seconds. Excessive oil can lead to elevated bearing temperatures. This method is suitable for SX‑series crossed roller bearings.

4. Spray Lubrication Method

The spray lubrication method employs an oil mist generated by mixing dry compressed air with lubricant through a nozzle, which is then directed into SX-series crossed roller bearings. The airflow carrying the oil mist cools the bearings and helps prevent the ingress of contaminants. This method is well suited for lubricating high-speed, low-temperature bearing components.

Product Specifications

 

SX Series Crossed Roller Bearing Model Parameters
Model	Main Dimensions					Axial dynamic load rating	Axial static load rating	Radial dynamic load rating	Radial static load rating	Weight
	Inner	Outer	Height	Chamfer	Oil hole
	d	D	B, B1	rs	s	C a	C oa	C r	C or	Kilogram
SX 01 1814	70	90	10	0.6	1.2	18	60	12	30	0.3
SX 01 1818	90	115	13	1	2	26	96	17	47	0.4
SX 01 1820	100	125	13	1	2	28	106	18	52	0.5
SX 01 1824	120	150	16	1	2	41	153	26	75	0.8
SX 01 1828	140	175	18	1.1	2.5	64	237	41	116	1.1
SX 01 1832	160	200	20	1.1	2.5	69	272	44	133	1.7
SX 01 1836	180	225	22	1.1	2.5	98	381	63	187	2.3
SX 01 1840	200	250	24	1.5	2.5	106	425	68	208	3.1
SX 01 1848	240	300	28	2	2.5	149	612	95	300	5.3
SX 01 1860	300	380	38	2.1	2.5	245	1027	156	504	12
SX 01 1868	340	420	38	2.1	2.5	265	1148	167	563	13.5
SX 01 1880	400	500	46	2.1	2.5	385	1699	244	833	24
SX0118/500	500	620	56	3	2.5	560	2538	355	1244	44