RAS Bearings
Ball Bearing
What is a Ball Bearing?
A ball bearing is one of the most important components in both industrial machines and household appliances. Its primary function is to connect two machine parts one usually a rotating shaft and the other a fixed housing and allow them to move smoothly with minimal friction.
Although some contact friction occurs at the surface, the spherical balls roll between the inner and outer rings, ensuring frictionless motion, reduced wear and efficient performance. This makes ball bearings essential in applications ranging from automotive systems and industrial gearboxes to fans, motors and daily-use appliances.
RAS Ball Bearings Product Range
| Type | Series / Range | Details |
|---|---|---|
| Deep Groove Ball Bearings (DGBB) | 6000–6060, 6200–6240, 6300–6334, 6403–6420, 16004–16052, 61800–61880, 61900–61996 | EMQ bearings, Miniature options, Open/ZZ/RS/2RS/N/NR variants |
| Angular Contact Ball Bearings | 7200–7230, 7302–7320, 7404–7420, 3200–3220, 3302–3320 | Single row (axial loads one direction), Double row (both directions), 25°/30°/40° contact angle |
| Four Point Contact Ball Bearings | QJ204M–QJ220M, QJ304M–QJ320M | Compact axial design, 35° contact angle, non-split rings |
| Self-Aligning Ball Bearings | 1204–1230, 1304–1320, 1404–1420, 2204–2220, 2304–2320 | Available in B, BG, BMG series, misalignment tolerance |
| Thrust Ball Bearings | 51100–51160, 51200–51260, 51304–51330, 51404–51430, 52200–52220 | Brass cage options, handles axial loads efficiently |
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Technology
Types of Ball Bearings
Deep Groove Ball Bearings (DGBB)
These versatile bearings carry radial and axial loads in both directions at high speeds. RAS® offers EMQ (Electric Motor Quality) bearings and miniature options with open, ZZ, RS and 2RS seals. Widely used in motors, pumps, conveyors and fans.
Angular Contact Ball Bearings
Available in single-row and double-row designs, these bearings are built for combined radial and axial loads. Offered with 25°, 30°, and 40° contact angles, they deliver high precision, accuracy and performance for gearboxes, pumps and precision machinery.
Four Point Contact Ball Bearings
Four point contact ball bearings feature a 35° contact angle and dual raceways, saving axial space compared to angular contact bearings. Designed for stability and reliability, they perform efficiently in compressors, machine tools and gear drives.
Self-Aligning Ball Bearings
Self-aligning ball bearings have two rows of balls and a sphered raceway that automatically compensates for shaft misalignment. They provide smooth running, reduced friction and dependable high-speed performance in agricultural, textile and flexible mounting applications.
Thrust Ball Bearings
Built for axial load handling, thrust ball bearings provide stability in vertical shafts and assemblies. Compact in size yet efficient, they are widely used in automotive, heavy machinery and industrial systems requiring thrust load support.
Best for: automotive assemblies, vertical shafts and heavy industrial applications.
Customize & Special Ball Bearings
Compact, lightweight and highly precise, these bearings are designed for space-constrained applications. Available in metric and inch sizes, they are commonly used in medical devices, robotics, electronics and consumer products requiring efficient miniature motion solutions.
Best for: medical devices, robotics, electronics and consumer products.
Key Features of RAS Ball Bearings
- Smooth and low-friction operation with reduced wear and heat generation.
- Wide versatility with DGBB, Angular Contact, Four Point, Self-Aligning and Thrust designs.
- Long service life using premium SAE 52100 / 100Cr6 bearing steel.
- Tolerates misalignments for stable, efficient performance.
- Compact and lightweight design for space-constrained applications.
- Custom options with seals, shields, cages and lubricants for specific needs.
Applications of Ball Bearings
Aerospace & Defence
- Aircraft controls, jet engines and helicopter systems
- Specialised bearings for defence and high-performance equipment
Automotive & Transportation
- Cars, tractors, motorcycles, trucks and buses
- Wheel hubs, engines, transmissions and gearboxes
Railways
- Locomotives, coaches and axle-boxes
- Bearings designed for high speed, heavy load and long service life
Industrial & Engineering
- Pumps, compressors and conveyor systems
- Machine tools, motors, reducers and heavy-duty equipment
Textile Machinery
- Spinning mills, weaving machines and high-speed processing units
- Bearings designed for continuous operation with minimal downtime
Medical & Dental
- Miniature bearings for medical devices and surgical tools
- Precision applications in dental equipment and diagnostic machines
Consumer & Sporting Goods
- Skates, skateboards, fishing reels and household appliances
- Bearings for smoother motion in electronics and lifestyle products
Construction of Ball Bearings
A ball bearing is not a single piece but an assembly of precision components:
- Inner Ring (Raceway): Fits onto the rotating shaft.
- Outer Ring (Raceway): Fits into the housing to provide support.
- Balls: Hardened steel balls positioned between the rings to carry the load.
- Cage (Retainer): Maintains spacing and guides the balls for uniform rotation.
This compact design ensures low rolling resistance, smooth operation and extended life.
Why Choose RAS Ball Bearings?
- Over 18 years of expertise in rolling-element bearing design and manufacturing.
- IATF 16949:2016 certified processes ensuring zero-defect supplies.
- 500+ skilled employees and a fully equipped R&D centre with modern simulation and testing facilities.
- Custom-engineered solutions tailored to industry-specific requirements.
- Global supply chain with reliable after-sales support.
FAQs on Ball Bearings
What is the main purpose of ball bearings?
Ball bearings are used to reduce friction between moving parts, allowing smooth rotation while supporting both radial and axial loads. They make machines run more efficiently and last longer.
How do ball bearings work?
Ball bearings work by replacing sliding friction with rolling friction. Small steel balls roll between the inner and outer rings, reducing wear, lowering heat and ensuring smoother, more efficient rotation of shafts and components.
What materials are used in RAS ball bearings?
RAS ball bearings are made using SAE 52100 / 100Cr6 chrome steel and stainless steel. These materials provide high strength, hardness, corrosion resistance and fatigue resistance, making them suitable for heavy-duty Indian industries.
How are ball bearings measured?
Ball bearings are measured by their bore diameter (inner ring), outer diameter and width. These measurements follow ISO standards, ensuring global compatibility and easy replacement between different brands.
What is the size and radius of a ball bearing?
Size means the bearing’s bore, outer diameter and width.
Radius refers to the curvature of the races that match the balls, ensuring smoother rolling, less stress and longer life.