Spherical Roller Bearings

230 Series Spherical Roller Bearings

The 230 series spherical roller bearings are classified as ultra-light thin-section bearings, featuring a slim wall structure, large bore diameter and relatively compact outer diameter. This streamlined design minimizes radial installation space occupation, making it the ideal solution for machinery with strict dimensional assembly restrictions. The bearings maintain excellent self-aligning performance and stable heavy radial load capacity, with limited axial load bearing capability for standard low-speed operating scenarios.

Equipped with comprehensive cage configurations including CC stamped steel, E optimized internal geometry, and solid brass CA & MB variants, these bearings accommodate diverse lubrication conditions and steady low-speed continuous operation, delivering consistent and reliable long-term performance in heavy industrial environments.

Primarily engineered for large low-speed rotary equipment, this series is widely utilized for metallurgical rolling mill support rolls, paper and chemical industry drying cylinders, auxiliary support structures of large rotary kilns, oversized low-speed ventilation devices and low-speed heavy-duty turntable machinery.

Size range: Inner Diameter: 170-700mm

Material: GCr15/GCr15SiMn/G20Cr2Ni4A

Load Capacity: High radial and axial load capacity

Cage Types: CC / E /CA / MB / others

1. What are 230 Series Spherical Roller Bearings

The 230 series are thin-wall wide-section double-row spherical roller bearings. Featuring large bore diameter, relatively small outer diameter, thin and wide cross-section, they belong to lightweight heavy-duty bearings. Designed specifically for large-diameter hollow shafts and compact large-scale rotary equipment, they adopt a self-aligning spherical outer ring structure to compensate for assembly deviation of large mechanical facilities.

2. Designation System of 230 Series Spherical Roller Bearings

Take model 23048CA/W33 for detailed breakdown:

230: Series code. Digit 2 stands for double-row barrel-shaped rollers; 30 refers to the thin-wall wide large-bore series.

48: Bore code, corresponding to a bearing bore diameter of 240mm.

CA: Machined solid brass cage; K: 1:12 standard tapered bore for adapter sleeve mounting; W33: Outer ring with integral lubrication groove and grease hole for online relubrication; C3: Increased internal clearance specially for high-temperature working conditions.

3. Characteristics of 230 Series Spherical Roller Bearings

1. Adopt large-bore thin-wall outer ring structure, compatible with hollow shaft mounting, saving installation space and realizing equipment lightweight design.

2. Equipped with evenly arranged wide double-row rollers, it boasts strong radial load capacity and can bear moderate bidirectional combined axial loads.

3. Large self-aligning angle provides strong error tolerance, applicable to large drums and rotary cylinders with long-term eccentricity and shaft deflection.

4. Complete bore size range covers hollow transmission shafts of medium and large industrial equipment, with high universal adaptability.

5. Lighter weight than standard thick bearings with the same bore size, which reduces rotating friction and lowers equipment operating energy consumption.

4. Applications of 230 Series Spherical Roller Bearings

Large paper-making dryer cylinders, metallurgical continuous casting support rolls, industrial large rotary drums, aluminum foil rolling mills, marine auxiliary machinery, building material large drying rotary equipment, large hollow-shaft rotary main units.

Series	Bearing Models	d (mm)	D (mm)	T (mm)	Approx Weight (KGS)
23022	23022CC / 23022E / 23022CA / 23022MB	110	170	45	3.7
23024	23024CC / 23024E / 23024CA / 23024MB	120	180	46	4.05
23026	23026CC / 23026E / 23026CA / 23026MB	130	200	52	5.8
23028	23028CC / 23028E / 23028CA / 23028MB	140	210	53	6.3
23030	23030CC / 23030E / 23030CA / 23030MB	150	225	56	7.9
23032	23032CC / 23032E / 23032CA / 23032MB	160	240	60	9.14
23034	23034CC / 23034E / 23034CA / 23034MB	170	260	67	12.5
23036	23036CC / 23036E / 23036CA / 23036MB	180	280	74	16.5
23038	23038CC / 23038E / 23038CA / 23038MB	190	290	75	17.5
23040	23040CC / 23040E / 23040CA / 23040MB	200	310	82	22
23044	23044CC / 23044E / 23044CA / 23044MB	220	340	90	29.5
23048	23048CC / 23048E / 23048CA / 23048MB	240	360	92	32.5
23052	23052CC / 23052E / 23052CA / 23052MB	260	400	104	46.5
23056	23056CC / 23056E / 23056CA / 23056MB	280	420	106	50.5
23060	23060CC / 23060E / 23060CA / 23060MB	300	460	118	70
23064	23064CC / 23064E / 23064CA / 23064MB	320	480	121	76.5
23068	23068CC / 23068E / 23068CA / 23068MB	340	520	133	100
23072	23072CC / 23072E / 23072CA / 23072MB	360	540	134	105
23076	23076CC / 23076E / 23076CA / 23076MB	380	560	135	110
23080	23080CC / 23080E / 23080CA / 23080MB	400	600	148	145
23084	23084CC / 23084E / 23084CA / 23084MB	420	620	150	155
23088	23088CC / 23088E / 23088CA / 23088MB	440	650	157	180
23092	23092CC / 23092E / 23092CA / 23092MB	460	680	163	205
23096	23096CC / 23096E / 23096CA / 23096MB	480	700	165	210

Production Process

Blueprint · Designing Precision

Given the structural characteristics of crossed roller bearings (rollers arranged in a 90° cross pattern), our technical team uses 3D CAD and finite element analysis (FEA) software to accurately calculate raceway angles, spacing, and interference.

Customizing products based on customer operating conditions, we benchmark against P2/P4/P5 tolerance classes and simulate post-assembly rotational precision in advance. The blueprint serves as the sole standard guiding all subsequent turning, grinding, and inspection processes.

Turning & Grinding · Rough to Mirror

Turning and grinding are the core processes that determine the bearing's geometric precision. We use high-rigidity CNC lathes for step-by-step ring processing, ensuring basic inner/outer diameter and raceway dimensions through rough, semi-finish, and finish turning while leaving grinding allowances.

We employ plunge grinding with formed grinding wheels for the V-shaped raceways of crossed roller bearings, and perform combination matching for the split inner/outer rings to ensure rotational plane runout meets P5 or higher standards.

Assembly · Interlocking Precision

The assembly of crossed roller bearings is more delicate than standard bearings: rollers must be arranged in an alternating cross pattern and precisely guided by spacers or cages.

All components are ultrasonically cleaned, dried, and grouped according to measured dimensions. High rigidity and stable torque are then imparted to the crossed roller bearings through negative clearance or preload adjustments. Assembly is completed in a constant temperature and humidity cleanroom to ensure P4/P2 level precision.

Inspection · Not Missing a Micron

As tolerance classes P5, P4, and P2 become progressively stricter, our inspection equipment and processes are upgraded accordingly:

We use high-precision roundness measuring instruments for dimensional tolerances, dial indicators with dedicated test mandrels for radial and axial runout, profilometers and Coordinate Measuring Machines (CMM) to verify raceway profiles and angles, and dedicated clearance and torque testers to determine clearance and starting torque.

Packaging · Anti-Rust & Protection

The packaging process is equally strict, ensuring zero loss of precision for the crossed roller bearings from the factory until pre-installation.

Eco-friendly anti-rust oil is evenly sprayed to ensure no residual particles in the inner cavity. Each bearing is vacuum-sealed in a thickened PE bag and film for water and dust protection, then boxed using wrapping tape. The outer carton is lined with high-density foam and pearl cotton to prevent transport collisions, and is marked with the model, precision grade (P5/P4/P2), and production batch number.