Rotary Table Bearings

BRT Rotary Table Bearings

BRT Series Rotary Table Bearings are high-precision axial-radial units featuring a triple-row roller configuration. They consist of housing washers, shaft washers, thrust washers, needle roller cages, and radial cylindrical rollers. This integrated design handles simultaneous bidirectional axial and radial loads. Key features include P2/P4 precision grades, extreme rigidity, and integrated mounting holes. Interchangeable with mainstream YRT type rotary table bearings for industrial robots, rotary tables and precision automation systems.

Equivalent: Compatible with YRT Series Rotary Table Bearings

Size: 50mm - 1030mm

Precision Class: P4 / P2

Radial/Axial Runout: 0.002mm - 0.005mm

Bore Diameter Range: 50mm - 1030mm

Axial Static Load : 125 kN - 12,500 kN

Tilt Rigidity: 150 - 60,000 Nm/mrad

Lead Time: 30 Days

What are BRT Series Rotary Table Bearings?

BRT series rotary table bearings are high-precision axial-radial combined cylindrical roller bearings specifically designed for high-accuracy rotating applications. Their unique structure consists of two axial roller rows and one radial roller row, enabling them to support large axial loads, radial loads, and tilting moments simultaneously with extreme stability.

At BYBearings, we provide more than just hardware; we deliver precision-engineered axial-radial solutions. As a professional manufacturer, we design the BRT series to serve as the critical foundation for high-end machinery, ensuring the zero-play performance and micro-meter positioning accuracy required in modern industrial manufacturing.

Technical Specifications

Our BRT series is manufactured to meet the most demanding engineering standards:

Size: 50mm - 1030mm

Precision Class: P4 / P2

Radial/Axial Runout: 0.002mm - 0.005mm

Axial Static Load: 125 kN - 12,500 kN

Tilt Rigidity: 150 - 60,000 Nm/mrad

Core Features of BRT Bearings

High Load Capacity: The triple-row roller configuration provides vastly superior rigidity compared to standard ball-type rotary bearings.

Ready-to-Mount Design: Features integrated mounting holes on both inner and outer rings, allowing for direct installation without complex clamping flanges or housings.

Extreme System Stiffness: Factory-set preloading ensures maximum tilt rigidity and eliminates internal clearance for ultra-stable rotation.

High Positioning Accuracy: Designed specifically for indexing tasks where sub-micron rotational accuracy is mandatory.

Versatile Applications Across Industries

BYBearings' BRT solutions are the industry standard for high-torque and high-precision equipment:

Machine Tools: 4th and 5th-axis CNC rotary tables and indexing heads.

Precision Machining: High-accuracy milling heads, face plates, and grinding machines.

Measuring Instruments: Precision turntables for calibration and quality testing equipment.

Automation: High-speed indexing tables and heavy-duty robotic arm bases.

Expert Manufacture & Customization at BYBearings

As a specialist BRT Rotary Table Bearings supplier, we utilize state-of-the-art CNC processing and advanced heat treatment to ensure every bearing withstands extreme work cycles. We recognize that industrial needs vary by project.

Looking for Custom BRT Rotary Table Bearings? If your equipment requires specialized dimensions, high-speed variants, or unique mounting patterns, BYBearings offers complete OEM/ODM customization. Our engineering team collaborates with you to transform your technical blueprints into high-performance components.

Price & Inquiry Support

The price of BRT series rotary table bearings is based on the specific dimensions, precision grade (P4 vs P2), and volume requirements. We provide competitive factory-direct pricing to ensure your precision projects remain cost-effective without compromising on durability.

Contact BYBearings today for a technical datasheet or a fast price quote for your BRT series bearing requirements!

BRT Rotary Table Bearings Techspecs

Model Number	Boundary Dimensions (mm)								Axial Load (KN)		Radial Load (KN)		Limiting Speed (Grease)	Weight (Kg)
Model Number	d	D	H	H1	C	D1	J	J1	Ca	Coa	Cr	Cor	Limiting Speed (Grease)	Weight (Kg)
BRT50	50	126	30	20	10	105	63	116	38	158	28.5	49.5	600	1.6
BRT80	80	146	35	23.35	12	130	92	138	56	255	42.5	100	530	2.4
BRT100	100	185	38	25	12	160	112	170	76.5	415	47.5	120	430	4
BRT120	120	210	40	26	12	184	135	195	102	540	52	143	340	5.3
BRT150	150	240	40	26	12	214	165	225	112	630	56	170	320	6.2
BRT180	180	280	43	29	15	244	194	260	118	710	69.5	200	280	7.7
BRT200	200	300	45	30	15	274	215	285	120	765	81.5	220	260	9.7
BRT260	260	385	55	36.5	18	345	280	365	160	1060	93	290	200	18.3
BRT325	325	450	60	40	20	415	342	430	275	1930	120	345	170	25
BRT395	395	525	65	42.5	20	486	415	505	300	2280	186	655	140	33
BRT460	460	600	70	46	22	560	482	580	355	2800	200	765	120	45
BRT580	580	750	90	60	30	700	610	720	490	4250	228	965	80	89
BRT650	650	870	122	78	34	800	680	830	1040	8000	490	1800	65	170
BRT850	850	1095	124	80.5	37	1018	890	1055	1000	8650	455	1730	50	253
BRT950	950	1200	132	86	40	1130	990	1160	1290	11400	530	2040	40	312
BRT1030	1030	1300	145	92.5	40	1215	1075	1255	1380	12000	620	2650	35	375
BRT1200	1200	1490	164	108	52	1410	1240	1445	1435	12850	745	2800	25	450

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.