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MRC

MRC is a brand of precision ball bearings, historically associated with the Marlin-Rockwell Corporation, a manufacturer with origins in the early 20th century. The brand is recognized for producing angular contact ball bearings, particularly double-row configurations, used in applications requiring combined radial and axial load capacity. MRC bearings are specified by engineers for their dimensional accuracy, material consistency, and adherence to ABEC (Annular Bearing Engineers Committee) tolerance classes. The product line includes metric-series double-row angular contact bearings with 30° contact angles, available in open, shielded, and sealed variants. These bearings are constructed with steel or thermoplastic cages and are rated to ABEC 1 precision, suitable for general industrial machinery, pumps, compressors, and gearboxes. 3G Electric supplies a range of MRC double-row angular contact bearings, covering bore sizes from 20 mm to 80 mm and industry numbers such as 3202/5202 through 3216/5216 and 3306/5306. Each SKU is supported with datasheets containing dimensional specifications, load ratings, and lubrication recommendations. The inventory includes shielded (FF suffix) and sealed (ZZ suffix) options for applications requiring contamination protection, as well as open designs for oil-lubricated systems. 3G Electric provides logistics support for global shipment, enabling procurement teams to source these bearings without geographic restriction. For maintenance managers and plant engineers, MRC bearings offer a standardized replacement path for existing equipment, with interchangeability across common metric bearing series. The double-row angular contact design provides inherent rigidity and can accommodate axial loads in both directions, reducing the need for paired bearing arrangements in certain applications. 3G Electric's catalog includes 181 SKUs of MRC bearings, each listed with manufacturer part numbers and technical specifications to facilitate direct cross-referencing with existing bills of materials.

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About MRC

MRC is a brand of precision ball bearings, historically associated with the Marlin-Rockwell Corporation, a manufacturer with origins in the early 20th century. The brand is recognized for producing angular contact ball bearings, particularly double-row configurations, used in applications requiring combined radial and axial load capacity. MRC bearings are specified by engineers for their dimensional accuracy, material consistency, and adherence to ABEC (Annular Bearing Engineers Committee) tolerance classes. The product line includes metric-series double-row angular contact bearings with 30° contact angles, available in open, shielded, and sealed variants. These bearings are constructed with steel or thermoplastic cages and are rated to ABEC 1 precision, suitable for general industrial machinery, pumps, compressors, and gearboxes. 3G Electric supplies a range of MRC double-row angular contact bearings, covering bore sizes from 20 mm to 80 mm and industry numbers such as 3202/5202 through 3216/5216 and 3306/5306. Each SKU is supported with datasheets containing dimensional specifications, load ratings, and lubrication recommendations. The inventory includes shielded (FF suffix) and sealed (ZZ suffix) options for applications requiring contamination protection, as well as open designs for oil-lubricated systems. 3G Electric provides logistics support for global shipment, enabling procurement teams to source these bearings without geographic restriction. For maintenance managers and plant engineers, MRC bearings offer a standardized replacement path for existing equipment, with interchangeability across common metric bearing series. The double-row angular contact design provides inherent rigidity and can accommodate axial loads in both directions, reducing the need for paired bearing arrangements in certain applications. 3G Electric's catalog includes 181 SKUs of MRC bearings, each listed with manufacturer part numbers and technical specifications to facilitate direct cross-referencing with existing bills of materials.

Common Applications

  • Industrial pump shafts — MRC 5200 series double-row angular contact bearings for radial and axial load support
  • Gearbox output shafts — MRC 5210C open bearing for oil-lubricated, high-speed applications
  • Electric motor bearing housings — MRC 5202SBKFF shielded bearing for contamination resistance in clean environments
  • Conveyor roller assemblies — MRC 5306MG open bearing for moderate load and speed conditions
  • Compressor crankshafts — MRC 5214C double-row bearing for combined load capacity in reciprocating machinery
  • Machine tool spindles — MRC 5213MFF shielded bearing for precision rotation with minimal maintenance

Frequently asked questions

Common questions about MRC from 3G Electric.

What is the typical contact angle of MRC double-row angular contact bearings?

MRC double-row angular contact bearings in the 3200/5200 and 3300/5300 series have a 30° contact angle. This angle is designed to handle combined radial and axial loads, with the axial load capacity increasing as the contact angle increases. The 30° angle is a common standard for general industrial applications, providing a balance between radial and thrust load handling.

What do the suffixes FF and ZZ mean on MRC bearing part numbers?

On MRC bearings, the suffix FF indicates double shields (non-contact metal shields on both sides), while ZZ indicates double seals (contact rubber seals on both sides). Shielded bearings (FF) are suitable for applications where low friction is required and contamination is minimal. Sealed bearings (ZZ) provide better protection against dirt and moisture but have slightly higher torque. Both options are available in the 5200 series double-row angular contact bearings.

Are MRC double-row angular contact bearings available in open configurations?

Yes, MRC double-row angular contact bearings are available in open designs, as seen in models like 5210C, 5214C, and 5306MG. Open bearings have no shields or seals and are intended for applications where oil lubrication is used or where the bearing is housed in a sealed enclosure. They allow for higher speed operation and easier lubrication flow compared to shielded or sealed variants.

What cage materials are used in MRC double-row angular contact bearings?

MRC double-row angular contact bearings are supplied with either steel cages or thermoplastic cages. Steel cages (often denoted by the absence of a specific cage suffix or by the letter M in some part numbers) offer high strength and are suitable for high-temperature or high-vibration applications. Thermoplastic cages (as in the 5202SBKFF model) are lighter, reduce noise, and provide good wear resistance in moderate-speed applications. The choice depends on operating conditions and lubrication method.

What ABEC tolerance class do MRC double-row angular contact bearings typically meet?

MRC double-row angular contact bearings in the 3200/5200 and 3300/5300 series are manufactured to ABEC 1 tolerance class. ABEC 1 is the standard precision level for general industrial bearings, providing adequate accuracy for most machinery applications such as pumps, fans, and gearboxes. For applications requiring higher precision, other bearing series or matched sets may be specified, but the standard MRC double-row offerings are ABEC 1.

Does 3G Electric supply MRC products?

Yes — 3G Electric (S) Pte. Ltd. supplies MRC products. We stock the MRC catalog and supply genuine factory-original products with full manufacturer warranty and technical support.