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Toroidal Roller Bearings

Toroidal roller bearings are self-aligning bearings that support axial displacement in non-locating positions. They combine the capabilities of spherical roller bearings (misalignment compensation) and cylindrical roller bearings (axial displacement). These bearings feature a single row design with symmetrical, slightly crowned rollers and specially profiled raceways, ensuring uniform load distribution and reduced friction. Toroidal roller bearings are ideal for applications involving high radial loads, shaft deflection and misaligned bearing arrangements. BKZ Industry is a professional toroidal roller bearing manufacturer, offering a full range of designs including caged, full complement and sealed versions. Our toroidal roller bearings are widely used in mining, steel, paper production and food processing industries.
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Toroidal Roller Bearings Are Self Aligning Bearings

Features & Advantages of BKZ Industry Toroidal Bearings

BKZ Industry’s toroidal roller bearings combine excellent self-aligning capability, smooth axial displacement, high load capacity, and long service life, delivering reliable performance in demanding applications. Backed by ISO 9001 certification, a strict quality control system, and extensive export experience, BKZ Industry stands out as a dependable choice for toroidal roller bearing solutions.

Key Features of Toroidal Roller Bearings

Self-Aligning Capability

The rollers feature a slightly crowned (toroidal) profile and operate in a matching curved raceway. This geometry allows the rollers to automatically align within the raceway, accommodating misalignment and shaft deflection.

Axial Displacement Capability

With no guiding flanges and a toroidal roller design, the rollers are self-guiding and can move freely in the axial direction. This enables the bearing to accommodate thermal expansion and axial displacement while primarily carrying radial loads.

High Load Carrying Capacity

The line contact between rollers and raceways provides a larger contact area for load distribution. Combined with long rollers and an optimized crowned profile, this design supports high radial load capacity.

Low Friction and Low Operating Temperature

Self-guiding rollers minimize internal friction, while the optimized contact between rollers and raceways ensures even load distribution. The absence of axial forces and the formation of a stable lubricant film help reduce friction and operating temperature.

Long Service Life

Reduced friction, lower operating temperatures, and the absence of internal axial stress contribute to less wear and extended bearing service life.

Why Choose BKZ Industry

ISO Certified with 15+ Years of Manufacturing Experience

BKZ Industry is an ISO 9001 certified bearing manufacturer with over 15 years of production experience. We operate two modern factories and own a Shenzhen base, ensuring consistent quality and reliable supply.

Strict Quality Control System

We implement a comprehensive quality control system throughout the entire production process, including raw material inspection, in-process quality control, heat treatment monitoring, material performance testing, and final inspection, ensuring every bearing meets international standards and customer requirements.

Extensive Export Experience

BKZ Industry has served customers in more than 50 countries worldwide, with strong export experience and a deep understanding of international market requirements. We provide complete export documentation and certifications to ensure smooth and efficient global delivery.

Stable Supply Chain & On-Time Delivery

With over 15 production lines and 400+ employees, we achieve a daily production capacity of more than 60,000 bearings. Our strong manufacturing capability and well-managed supply chain enable us to guarantee stable supply and on-time delivery for every order.

Customization & OEM Capability Available

Supported by an experienced engineering team, BKZ Industry offers flexible OEM and customization services, including customized dimensions, special coatings, optimized designs, and various cage types, providing tailored solutions to meet specific application and industry needs.

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Types of Toroidal Roller Bearings

Toroidal roller bearings can be classified into various types based on their design features, sealing configurations, and other application-specific requirements.

Caged Toroidal Roller Bearings

Caged Toroidal Roller Bearings

Designed with a cage to evenly space toroidal rollers, this structure reduces friction and prevents roller contact. The crowned rollers and curved raceway enable self-alignment and axial displacement. They offer stable operation, low heat generation, and long service life. Widely used in gearboxes, electric motors, conveyors, and heavy industrial machinery.

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Sealed Toroidal Roller Bearings

Sealed Toroidal Roller Bearings

Equipped with integrated seals on one or both sides, these bearings protect against contamination and retain lubricant. The toroidal roller design allows misalignment and axial movement while maintaining smooth rotation. They reduce maintenance requirements and improve reliability, making them ideal for agriculture, mining, material handling, and dusty or wet environments.

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Open Toroidal Roller Bearings

Open Toroidal Roller Bearings

Featuring an open design without seals, these bearings allow flexible external lubrication such as oil or grease systems. The toroidal rollers and raceway provide self-alignment and axial displacement capability. They are suitable for high-speed or high-temperature applications where controlled lubrication is required, commonly used in industrial gearboxes, paper mills, and processing equipment.

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Customized Toroidal Roller Bearings

Customized Toroidal Roller Bearings

We support customized toroidal roller bearing solutions tailored to your specific requirements, including special designs such as split configurations and full complement options. Additional customization can involve internal clearance, cage materials, coatings, and lubrication methods, ensuring optimal performance, reliability, and extended service life in demanding industrial applications.

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*We also offer bearings not listed here. Contact us for more options.

Toroidal Roller Bearings Size Chart

Toroidal roller bearings do not follow a dedicated ISO size chart, and their dimensions are primarily defined by manufacturers, with partial reference to ISO boundary standards. The models below represent selected bearings we have previously produced for customer reference. For specific requirements or customized solutions, please contact us.

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Bearing Designation Bore Diameter d (mm) Outside Diameter D (mm) Width B (mm) Chamfer Radius r_min (mm) Basic Dynamic Load Rating Cr (kN) Basic Static Load Rating C0r (kN) Reference Speed (r/min) Limiting Speed (r/min) Weight (kg)
BKZ C3040 200 310 82 2.1 1120 1730 1700 2400 22
BKZ C4040V 200 310 109 2.1 1630 2650 260 30.5
BKZ C3140 200 340 112 3 1600 2320 1500 2000 40
BKZ C4140V 200 340 140 3 2360 3650 800 54
BKZ C3044 220 340 90 3 1320 2040 1600 2200 29
BKZ C4044V 220 340 118 3 1930 3250 2000 40
BKZ C3144 220 370 120 4 1900 2900 1400 1900 51
BKZ C2244 220 400 108 4 2000 2500 1500 2000 56.5
BKZ C3048 240 360 92 3 1340 2160 1400 2000 31.5
BKZ C3148 240 400 128 4 2320 3450 1300 1700 63
BKZ C3052 260 400 104 4 1760 2850 1300 1800 46
BKZ C3152 260 440 144 4 2650 4050 1100 1500 87
BKZ C3056 280 420 106 4 1860 3100 1200 1600 50
BKZ C3156 280 460 146 5 2850 4500 1100 1400 93
BKZ C3060M 300 460 118 4 2160 3750 1100 1500 71
BKZ C4060M 300 460 160 4 2900 4900 850 1200 95
BKZ C3160 300 500 160 5 3250 5200 1000 1300 120
BKZ C3064M 320 480 121 4 2280 4000 1000 1400 76.5
BKZ C3164M 320 540 176 5 4150 6300 950 1300 160
BKZ C3068M 340 520 133 5 2900 5000 950 1300 100
BKZ C3168M 340 580 190 5 4900 7500 850 1200 205
BKZ C3972M 360 480 90 3 1760 3250 1000 1400 44
BKZ C3072M 360 540 134 5 2900 5000 900 1200 105
BKZ C3172M 360 600 192 5 5000 8000 800 1100 215
BKZ C3976MB 380 520 106 4 2120 4000 950 1300 65.5
BKZ C3076M 380 560 135 5 3000 5200 900 1200 110
BKZ C3176MB 380 620 194 5 4550 7500 750 1000 230
BKZ C3980MB 400 540 106 4 2160 4150 900 1300 69
BKZ C3080M 400 600 148 5 3650 6200 800 1100 140
BKZ C3180MB 400 650 200 6 5000 8650 700 950 275
BKZ C3984M 420 560 106 4 2160 4250 850 1200 71
BKZ C3084M 420 600 150 5 3800 6400 800 1100 150
BKZ C3184M 420 700 224 6 6000 10400 670 900 340
BKZ C3988MB 440 600 118 4 2750 5300 800 1100 98
BKZ C3088MB 440 650 157 6 3750 6400 750 1000 185
BKZ C3188MB 440 720 226 6 5700 9300 670 900 360
BKZ C3992MB 460 620 118 4 2700 5300 800 1100 100
BKZ C3092M 460 680 163 6 4000 7500 700 950 200
BKZ C3192M 480 760 240 7.5 6800 12000 600 800 430
BKZ C4192M 480 760 300 7.5 8300 14300 480 630 535
BKZ C3996M 480 650 128 5 3100 6100 750 1000 120
BKZ C3096M 480 700 165 6 4050 7800 670 900 210
BKZ C3196MB 480 790 248 7.5 6950 12500 560 750 490

Applications of Toroidal Roller Bearings

Designed to handle heavy radial loads, misalignment, and axial displacement, toroidal roller bearings are widely used in demanding industrial applications to improve reliability, reduce maintenance, and extend service life.

FAQs About Toroidal Roller Bearings

Q1. What Are CARB Toroidal Roller Bearings?

CARB toroidal roller bearings are a type of toroidal roller bearing developed and trademarked by SKF, where “CARB” is SKF’s branded name for this design. They combine self-aligning capability with axial displacement, allowing them to accommodate misalignment and thermal expansion simultaneously. Functionally, CARB bearings and toroidal roller bearings are the same in principle, but “CARB” refers specifically to SKF products. BKZ Industry can manufacture toroidal roller bearings with equivalent design and performance, but cannot use the CARB trademark.

Cylindrical roller bearings are designed to carry high radial loads with line contact but typically have flanges that restrict axial movement, making them suitable for fixed or semi-floating positions. In contrast, toroidal roller bearings have a curved raceway and barrel-shaped rollers without flanges, allowing both misalignment and axial displacement. The relationship is that both are radial roller bearings, but toroidal bearings can replace cylindrical bearings in non-locating positions where axial movement and alignment flexibility are required.

Tapered roller bearings are designed to carry combined radial and axial loads, with rollers and raceways arranged at an angle, requiring precise adjustment and typically used in paired configurations. Toroidal roller bearings, however, primarily carry radial loads while allowing axial displacement and misalignment due to their toroidal geometry. Both use line contact and offer high load capacity, but their applications differ significantly: tapered bearings for combined load support, and toroidal bearings for non-locating positions with shaft movement.

A toroidal roller bearing mainly consists of an inner ring, outer ring, toroidal (barrel-shaped) rollers, and a cage. The inner and outer rings have curved raceways that match the roller profile, enabling self-alignment and axial displacement. The rollers are slightly crowned to reduce stress concentration, while the cage separates and guides the rollers to minimize friction and ensure stable operation under load.

Toroidal roller bearings are typically made from high-quality bearing steels such as 100Cr6 (AISI 52100 or GCr15), which provide high hardness, fatigue resistance, and wear resistance. For demanding applications, materials may include carburized steels, stainless steels, or special alloy steels. Cages can be made from pressed steel, machined brass, or polymer materials, while optional coatings or surface treatments can enhance corrosion resistance and performance.

Toroidal roller bearings can be lubricated with either grease or oil, depending on operating conditions such as speed, load, and temperature. Grease lubrication is commonly used for general applications due to its simplicity and sealing benefits, while oil lubrication is preferred for high-speed, high-temperature, or heavily loaded systems where better heat dissipation is required. Proper lubrication ensures a stable lubricant film between rollers and raceways, reducing friction, wear, and operating temperature, and significantly extending bearing service life.

Toroidal roller bearings use different cage types depending on application requirements, including pressed steel cages for cost-effective and general use, machined brass cages for high load and heavy-duty conditions, and sometimes polymer cages for reduced weight and lower friction. The cage design plays a critical role in guiding and spacing the rollers, reducing friction, and ensuring stable performance under varying loads and operating conditions.

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More Bearings from BKZ Industry

Beyond toroidal roller bearings, BKZ Industry offers a comprehensive range of products, including slewing bearings, stainless steel bearings, ceramic bearings, and other customized bearing solutions.

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Submit your toroidal roller bearing requirements, and our engineering team will provide fast, customized solutions with competitive pricing. Backed by strong technical support and quick response, we help you select the right bearing for your application with confidence.

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Complete the form below for a quote, or contact us at sales@bkzindustry.com or +86 18901426056 (WhatsApp/phone).