Cylindrical Roller Bearing

Rolling Out Top-Notch Engineered Bearings

With the most advanced technologies coupled with new generation manufacturing machines and an experienced team of engineers, MARC is constantly raising its growth index. The success is attributed to production of high quality bearings conforming to international specifications and standards.

To ensure that the quality is retained at all levels of production, MARC follows a streamlined process of bearing manufacturing. The process is performed in a devoted Production Unit equipped with Automatic CNC machines and also PLC machines. Furthermore, WMW and CINCINATI machines make the manufacturing process more efficient and smooth.

The manufacturing process divided into following stages:

Selection of Raw Materials

Raw material, SAE 52100 Steel conforming to international standards is used for manufacturing MARC bearings and same steel is used for all the bearing components like races, cages and rolling elements. All the cages are composed of CRC material and brass as per international standard specification.

Quality Check

The chemistry of the SAE 52100 Steel is checked, tested and verified through metallurgical testing performed by expert metallurgists. Before commencing the actual manufacturing the steel to be used is thoroughly inspected.

Forging & Annealing

Forging is a metal shaping treatment that works through the forces of heat and impact to give the desired shape to the metal. The process is performed on SAE 52100 Steel so as to deliver a perfect shape. Anneling is an association of heating and cooling treatment performed on the bearings so as to enhance the ductility of the bearings. This makes the bearings more workable with regards to molding them to any desired shape.

CNC Turning

Forged material is further used to do turning with the help of automatic CNC Machines. These machines are known worldwide for reliable operation and increased productivity when it comes to manufacturing complicated components with highest degree of accuracy and perfection.

Heat Treatment

All the components of the bearing including Inner & Outer races, rings and the rollers are heat treated to provide resistance to wear and tear. Both the inner and outer races are hardened to 60 ± 2 HRC as per international standard. The hardness of the races as well as the rolling elements is further checked and tested using a hardness tester.

Adoption of Standard Dimensions

Dimensions of a bearing play a vital role in the performance and usability of the bearing. This includes the inner diameter, the outer diameter and the diameter of the bearing width. All these three conform to international standards when it comes to verifying the bearing dimension at MARC.

Crack Testing

After the adoption of dimensional parameters bearings undergo magnaflux testing. This is an effective method for detecting any sort of cracks, pits, voids or laps in the steel. This is to ensure that the material is completely free of flaws before the actual production starts.

Grinding

The grinding process undergoes four stages namely:

• Face Grinding: In the face grinding process, duplex machine is used. Components are checked for size variations, flatness, roughness, parallelism and burning.

• OD Grinding: In this stage material is checked for 2 point ovality, 3 point ovality, roundness and roughness.

• Track Grinding: In this stage of the grinding process the size of the track is checked along with curvatures, taper, eccentric, roughness, 2 point ovality and 3 point ovality.

• ID Grinding: In this stage, an electronic measuring system known as marposs system is used to control size variation. The system checks for size precision in terms of ovality, roughness, roundness and other errors.

Super Finishing

After the grinding process, we reduce Roughness Average (Ra) value on Track with the help of Honing & Lapping machine & maintain RA value which provides super finished bearing components.

Cleaning & Assembly

After the super finishing process, all the races and rolling elements are washed and cleaned ultrasonically to clear off all the remaining dirt and dust. Thereafter, based on the specific customer requirements, the components are assembled with precision and excellence using

Fully automatic assembly line.

Packing

After assembling the components, bearings are neatly and securely packed under hygienic conditions. The manufactured bearings are first oiled to ensure protection against varied atmospheric effects and then wrapped securely in plastic bags. Further to that, these are packed in individual boxes which are collectively packed in a master box for transportation.

Types of Bearings

Tapered Roller Bearing

Tapered roller bearings are bearings especially constructed to endure both radial and axial loads simultaneously even under extreme environmental conditions and varying speeds. The type iscomposed of four inter-reliant components: the cone, the cup, tapered rollers and the cage. The rolling elements are positioned in a way that all of them meet a common axial point so as to provide a perfect rotating movement with low friction and increased power density.

Applications

• Automotive

• Agriculture

• Aerospace

• Construction

• Food

• Electrical

At MARC, we manufacture Tapered Roller Bearings ranging from 50 mm to 500 mm outer diameter suiting diverse industry needs.

Spherical Roller Bearings

Spherical roller bearings are self-aligning bearings designed to withstand all sorts of extreme conditions like heavy loads, shocks, vibrations, infected environment and severe misalignments. The type comprises of two rows of rollers, an outer ring raceway and two inner ring raceway all arranged in a manner so as to permit angular rotation about a common axial point. This angular rotation ensures seamless performance by smoothly handling both axial and radial load in both the directions.

Applications

Spherical roller bearings are used in numerous applications like mining, power generation and waste water treatment. However, these are majorly used in the following industries.

Automotive

Agriculture

Aerospace

Electrical

Industrial Equipments

At MARC, we manufacture Spherical Roller Bearings ranging from 50 mm to 500 mm outer diameter as per the diverse requirements of various industries.

Cylindrical Roller Bearings

Cylindrical roller bearings are designed to withstand heavy radial loads even for high speed applications. These can even bear axial load to a certain extent and also allow a misalignment of about 0.06 degree. The type is easy to assemble and disassemble as both the rings are interchangeable within the specified tolerance and clearance limits. These also have a strong resistance to overloads and shocks that makes them more widely used and accepted in varied industry verticals.

Applications

Cylinder roller bearings have a line contact between the bearings and hence are best suited for high speed applications. The most common applications of cylindrical roller bearings are in the following industries.

• Automotive

• Aerospace

• Construction

• Electrical

• Power

At MARC, we manufacture Cylindrical Roller Bearings ranging from 50 mm to 500 mm outer diameter to cater to diverse industry requirements.

Ball Bearings

Ball bearings are the most common types of bearings designed to withstand both axial and radial load while reducing heat and friction to its optimum. The type comprises of balls between two layers that transmit the load from the outer race to the inner race to ensure smooth performance at a lower coefficient of friction. Apart from the two races and the balls, ball bearings also comprise of:

• Snap rings are used to locate the position of ball bearings

• Shields are used to cover all the open spaces that exist between the two races

• Seals is used to retain lubricants and push out contaminants

Applications of ball bearings are endless with a touch on our day-to-day life. Some of the most important applications are in the following industries.

• Automotive

• Aerospace

• Electronics

• Industrial Equipments

At MARC, we manufacture Ball Bearings ranging from 40 mm to 300 mm outer diameter to meet the specific requirements of our valued buyers from different industries.

Special Types of Bearings

Apart from the roller and ball bearings, we manufacture wide range of Special Types of Bearings as per customers design, sample and specifications ranging from 50 mm to 400 mm outer diameter.

Quality

Undying Quality Defines MARC

Quality is the core value that defines the existence of MARC. The brand’s quality system is based on international standards committed to Quality-First Methodology in every aspect of the bearing manufacturing processes - starting from purchasing quality raw materials to delivering high performance bearings across the globe.

As a test for undying quality, all manufactured bearings undergo a rationalized process of various assessments and quality checks. The process works as follows:

• Procurement of SAE 52100 Steel: The SAE 52100 Steel is purchased after an analysis and verification done through Spectro Analysis. The process is performed in the laboratory for a complete assessment of composition, characteristics and quality of the steel. A test certificate of the same is also availed to ensure quality that satisfies the core business of manufacturing international quality bearings.

• In-House Quality Checks: Before the actual process begins, all the required instruments are calibrated and checked for quality by the appointed quality inspector.

• Quality of Production: At each and every stage of production, respective production workers along with appointed supervisors and inspectors carry out random checking to counter check the process performance and quality. Processes like forging, annealing, turning, grinding, super finishing, cleaning and assembly operations are outperformed using the best of quality control instruments like Hardness Tester, Surface Plate, Roundness Tester, Roughness Tester and Counter Machine.

• External Quality Checks: At regular intervals, external agencies also take care of quality through metallurgical testing for chemical and physical analysis. This is done to ensure high level of satisfaction in terms of producing quality bearings.

• Final Inspection: After the bearings are completely ready for packing and dispatch, quality check experts carry on meticulous inspection for dimensional parameters and other essentials specified by the customers.

MARC Bearings aims at creating its own benchmark in the global bearings industry by consistently enhancing bearings quality as well as process performance.

Cylindrical Roller Bearing Series:
Designed for heavy radial loads, however can tolerate light or intermittent thrust loads. Speed capabilities comparable to ball bearings.