Precision Crossed Roller Bearings

BBH Series Crossed Roller Bearings

The BBH Series Crossed Roller Bearing is a high-precision, integral ring bearing featuring cylindrical rollers arranged perpendicularly in a 90° V-shaped raceway. This unique crossed-roller configuration enables a single bearing to simultaneously support radial, axial, and moment loads with exceptional rigidity and rotational accuracy. Designed with un-split inner and outer rings, the BBH series offers enhanced structural integrity and simplified installation. It is ideal for demanding applications such as industrial robotics, CNC rotary tables, medical imaging equipment, and precision measuring instruments.
Interchangeable with mainstream CRBH type crossed roller bearings for industrial robots, rotary tables and precision automation systems.

Equivalent: Compatible with CRBH Series Crossed Roller Bearings

Inner Ring Diameter(shaft diameter)：20mm——800mm

Precision Class: P5/P4/P2

Basic Load Rating(radial): 2.9kN——468 kN

Delivery time: In Stock

What is BBH Series Crossed Roller Bearing?

The BBH Series is a high-performance crossed roller bearing designed with a thin-walled, compact structure. It features cylindrical rollers arranged orthogonally—crossing each other at 90° angles—within a single V-groove track.

This series is engineered by BYBearings to provide high rotational accuracy and rigidity while occupying minimal space. Unlike standard bearings, the BBH series can handle radial, axial, and moment loads simultaneously, making it an efficient solution for complex mechanical joints.

Features of BBH Series Crossed Roller Bearings

BYBearings manufactures the BBH series to ensure the following advantages:

Ultra-High Rotational Accuracy: With precision classes reaching P2, these bearings ensure minimal runout for critical applications.
High Load Capacity in Compact Size: Optimized linear contact between rollers and raceways allows for a basic radial load rating of up to 468 kN.
Multi-Directional Load Support: The 90° cross-array enables a single bearing to replace a combination of multiple traditional bearings.
Lightweight & Space-Saving: The thin-walled design reduces the overall weight of the equipment without sacrificing structural stiffness.

Applications of BBH Series Crossed Roller Bearings

Because of their high precision and compact nature, BBH bearings from BYBearings are widely used in:

Industrial Robotics: Ideal for harmonic reducers and robotic arm joints.
Precision Rotary Tables: Used in CNC indexing heads and machining centers.
Medical Instruments: Providing stable and smooth motion for precision surgical robots and imaging devices.
Semiconductor Manufacturing: Essential for wafer handling systems and precision positioning stages.

Techspecs of BBH Series Crossed Roller Bearings

The BBH Series from BYBearings follows rigorous technical standards:

Shaft Diameter (d): Wide range from 20mm to 800mm.
Precision Class: Available in P5, P4, and P2 grades for various accuracy needs.
Basic Load Rating (Radial): High performance ranging from 2.9 kN to 468 kN.
Material: Premium GCr15 bearing steel with professional heat treatment for long service life.

How does BBH Series Crossed Roller Bearings work?

The magic lies in the 90° V-groove. Because the rollers are alternatingly crossed, they act like two rows of bearings compressed into one track. When an axial force pushes from the top, half the rollers take the load; when a radial force pushes from the side, the other half stabilize the bearing. This unique geometry allows the BBH series to maintain its position even under complex, fluctuating forces.

How to Install BBH Series Crossed Roller Bearings

Installation is critical for maintaining high precision. BYBearings recommends the following:

Preparation: Clean the mounting surface and ensure the shaft and housing are free of burrs.
Alignment: Carefully align the bearing with the housing. For thin-walled BBH models, ensure the mounting seat is rigid enough to prevent deformation.
Press-Fitting: Apply pressure evenly to the ring being fitted (inner or outer) to avoid tilting.
Verification: Rotate the bearing by hand to check for smooth, consistent movement before final assembly.

Price of BBH Series Crossed Roller Bearings

The pricing for the BBH series is influenced by several factors:

Dimensions: Larger bore diameters (up to 800mm) require more material and intensive grinding.
Precision Requirements: P2 ultra-precision models involve higher manufacturing costs than P5/P4 grades.
Customization: Special clearances or surface treatments tailored to your project.
BYBearings Advantage: We offer competitive factory-direct pricing with a focus on cost-performance.

Supplier of BBH Series Crossed Roller Bearings

BYBearings is a globally recognized supplier and manufacturer of premium crossed roller bearings. We pride ourselves on:

Immediate Availability: Most standard BBH models are In Stock, ensuring the fastest delivery times in the industry.
Strict Quality Control: Every bearing undergoes rigorous testing to meet P5/P4/P2 standards.
Technical Support: Our engineers assist you in selecting the perfect model for your specific torque and load requirements.

Shaft Dia. (mm)	Model	ID (d) mm	OD (D) mm	Width (B) mm	Chamfer r(min) mm	Mounting Dim. ds (mm)	Mounting Dim. Dh (mm)	Dyn. Load C (kN)	Stat. Load C0 (kN)	Weight (kg)
20	BBH208A	20	36	8	0	22.8	31.2	2.9	2.4	0.04
25	BBH258A	25	41	8	0	27.8	36.2	3.1	2.8	0.05
30	BBH3010A	30	55	10	0.3	35.8	47.2	7.6	8.4	0.12
35	BBH3510A	35	60	10	0.3	40.8	52.2	7.9	9.1	0.13
40	BBH4010A	40	65	10	0.3	46.3	57.7	8.6	10.6	0.15
45	BBH4510A	45	70	10	0.3	51.3	63.2	8.9	11.3	0.17
50	BBH5013A	50	80	13	0.6	56	74	17.3	20.9	0.29
60	BBH6013A	60	90	13	0.6	66	84	18.8	24.3	0.33
70	BBH7013A	70	100	13	0.6	76	94	20.1	27.7	0.38
80	BBH8016A	80	120	16	0.6	88	112	32.1	43.4	0.74
90	BBH9013A	90	115	13	0.6	98	106	18	37	0.42
90	BBH9016A	90	130	16	0.6	98	122	33.1	46.8	0.81
100	BBH10016A	100	140	16	0.6	111.7	128.7	31.7	48.6	0.83
100	BBH10020A	100	150	20	0.6	110	140	50.9	72.2	1.45
110	BBH11012A	110	135	12	0.6	117	127	12.5	24.1	0.4
110	BBH11015A	110	145	15	0.6	118	135	23.7	41.5	0.75
110	BBH11020A	110	160	20	0.6	120	150	34	54	1.56
120	BBH12016A	120	150	16	1	127	141	24.2	43.2	0.72
120	BBH12025A	120	180	25	1	132	168	73.4	108	2.62
130	BBH13015A	130	160	15	0.6	136	150	25	46.7	0.72
130	BBH13025A	130	190	25	1	142	178	75.9	115	2.82
140	BBH14016A	140	175	16	1	147	162	25.9	50.1	1
140	BBH14025A	140	200	25	1	152	188	81.9	130	2.96
150	BBH15013A	150	180	13	1	157	172	27	53.5	0.68
150	BBH15025A	150	210	25	1	162	198	84.3	138	3.16
150	BBH15030A	150	230	30	2	173	211	100	156	5.3
160	BBH16025A	160	220	25	2	173	204	81.7	135	3.14
170	BBH17020A	170	210	20	2	180.7	203.3	29	62.1	2.21
180	BBH18025A	180	240	25	2	195	225	84	143	3.44
190	BBH19025A	190	240	25	1.5	202	222	41.7	82.9	3
200	BBH20025A	200	260	25	2	212	248	92.3	169	4
200	BBH20030A	200	280	30	2.5	218	258	114	200	6.7
200	BBH20035A	200	295	35	2.5	225	270	151	252	9.6
220	BBH22025A	220	280	25	2.5	234.3	262.7	92.8	171	4.1
240	BBH24025A	240	300	25	2.5	256	281	98.3	185	4.5
250	BBH25025A	250	310	25	1.5	262	298	102	207	4.97
250	BBH25030A	250	330	30	2.5	269	306	126	244	8.1
250	BBH25040A	250	355	40	2.5	275	326	195	348	14.8
300	BBH30025A	300	360	25	2	314	342	75.5	178	5.9
300	BBH30035A	300	395	35	2.5	322	368	183	367	13.4
300	BBH30040A	300	405	40	2.5	326	377	212	409	17.2
350	BBH35020A	350	400	20	2.5	360	383	54.1	143	3.9
400	BBH40035A	400	480	35	2.5	422	459	156	370	14.5
400	BBH40040A	400	510	40	1.5	428	479	241	531	23.5
500	BBH50040A	500	600	40	3	526	572	239	607	26
500	BBH50050A	500	625	50	3	536	587	267	653	41.7
600	BBH60040A	600	700	40	3	625.5	668	264	721	29
700	BBH70045A	700	815	45	3	725.5	782	281	836	46
800	BBH80070A	800	950	70	4	836	900	468	1330	105

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.