Spherical Roller Bearings

202 & 203 Series Single Row Spherical Roller Bearings

The 202 and 203 series single row spherical roller bearings are engineered for compact light-duty rotary equipment that demands stable load bearing and basic self-aligning capacity. Differentiated from double-row spherical roller bearing ranges, this line adopts a single row of symmetrical barrel rollers matched with a spherical outer ring raceway, which effectively offsets slight shaft deflection and assembly misalignment without sacrificing rotational stability.

Supplied with two standard cage options: glass fibre reinforced TVP polyamide cages and solid machined brass M cages. The bearing structure steadily bears radial loads plus limited bidirectional axial loads under medium rotating speeds. Small overall footprint and lightweight body greatly save radial and axial assembly space, enabling seamless installation and integration into miniature rotary components with tight dimensional limits.

They are widely adopted for light-load rotary parts across multiple industries, including small industrial fans, light conveyor rollers, compact agricultural machinery, miniature automation devices, textile processing equipment and other general light-duty mechanical systems.

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 202 and 203 Series Spherical Roller Bearings

The 202 and 203 series are miniature and small-size double-row spherical roller bearings belonging to the light-duty small-sized spherical roller bearing category. Compact in overall dimension, they feature basic self-aligning performance and are applied to medium & small rotary mechanisms under light loads with minor eccentricity.The 202 series features small bearings with narrow cross-sections, while the 203 series refers to small bearings with widened cross-sections.

2. Nomenclature of 202 & 203 Series Spherical Roller Bearings

Examples: 20208, 20310

First digit "2": Double-row roller construction
02 = Small bearing with narrow cross-section; 03 = Small bearing with widened cross-section
Last two digits stand for bore size: 08 corresponds to 40 mm bore diameter, 10 corresponds to 50 mm bore diameter
Suffix CC: Stamped steel sheet cage; Tapered bore and lubrication grooves are rarely equipped for these series.

3. Characteristics of 202 & 203 Series Spherical Roller Bearings

Compact footprint with minimal installation space occupation, perfect for small lightweight machinery
Basic self-aligning capacity to offset minor mounting misalignment
Simple structure, low cost and excellent interchangeability
The widened 203 series delivers higher load capacity than the narrow 202 series with identical bore size
Higher limiting speed than large-size spherical roller bearing series, suitable for medium-low speed and light-load working conditions

4. Applications of 202 & 203 Series Spherical Roller Bearings

Small conveying equipment, miniature woodworking machine tools, light-duty fans, small food processing rollers, rotary shafts of packaging machinery, transmission components for small agricultural machinery

Series	Bearing Models	d (mm)	D (mm)	T (mm)	Approx Weight (KGS)
20204	20204 TVP / 20204 M	20	47	14	0.11
20205	20205 TVP / 20205 M	25	52	15	0.135
20206	20206 TVP / 20206 M	30	62	16	0.2
20207	20207 TVP / 20207 M	35	72	17	0.28
20208	20208 TVP / 20208 M	40	80	18	0.37
20209	20209 TVP / 20209 M	45	85	19	0.42
20210	20210 TVP / 20210 M	50	90	20	0.48
20211	20211 TVP / 20211 M	55	100	21	0.64
20212	20212 TVP / 20212 M	60	110	22	0.8
20213	20213 TVP / 20213 M	65	120	23	1.08
20214	20214 TVP / 20214 M	70	125	24	1.12
20215	20215 TVP / 20215 M	75	130	25	1.24
20216	20216 TVP / 20216 M	80	140	26	1.5
20217	20217 TVP / 20217 M	85	150	28	2.1
20218	20218 TVP / 20218 M	90	160	30	2.76
20219	20219 TVP / 20219 M	95	170	32	3.1
20220	20220 TVP / 20220 M	100	180	34	3.9
20221	20221 TVP / 20221 M	105	190	36	4.67
20222	20222 TVP / 20222 M	110	200	38	5.5
20224	20224 TVP / 20224 M	120	215	40	6.66
20226	20226 TVP / 20226 M	130	230	40	7.3
20228	20228 TVP / 20228 M	140	250	42	9
20230	20230 TVP / 20230 M	150	270	45	10.5
20232	20232 TVP / 20232 M	160	290	48	14.4
20234	20234 TVP / 20234 M	170	310	52	17.9
20236	20236 TVP / 20236 M	180	320	52	18.9
20238	20238 TVP / 20238 M	190	340	55	22.4
20240	20240 TVP / 20240 M	200	360	58	26.6
20244	20244 TVP / 20244 M	220	400	65	37.4
20304	20304 TVP / 20304 M	20	52	15	0.15
20305	20305 TVP / 20305 M	25	62	17	0.25
20306	20306 TVP / 20306 M	30	72	19	0.37
20307	20307 TVP / 20307 M	35	80	21	0.5
20308	20308 TVP / 20308 M	40	90	23	0.7
20309	20309 TVP / 20309 M	45	100	25	0.88
20310	20310 TVP / 20310 M	50	110	27	1.12
20311	20311 TVP / 20311 M	55	120	29	1.56
20312	20312 TVP / 20312 M	60	130	31	1.96
20313	20313 TVP / 20313 M	65	140	33	2.65
20314	20314 TVP / 20314 M	70	150	35	3.1
20315	20315 TVP / 20315 M	75	160	37	3.76
20316	20316 TVP / 20316 M	80	170	39	4.56
20317	20317 TVP / 20317 M	85	180	41	5.24
20318	20318 TVP / 20318 M	90	190	43	6.12
20319	20319 TVP / 20319 M	95	200	45	7.08
20320	20320 TVP / 20320 M	100	215	47	8.62
20322	20322 TVP / 20322 M	110	240	50	11.8
20324	20324 TVP / 20324 M	120	260	55	15.1
20326	20326 TVP / 20326 M	130	280	58	18.5
20328	20328 TVP / 20328 M	140	300	62	22.4
20330	20330 TVP / 20330 M	150	320	65	27

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.