6200 Bearing: Dimensions, Load Capacity & Applications

6200 Bearing Dimensions: The Complete Series Reference

The 6200 bearing series follows ISO 15 dimensional standards, ensuring full interchangeability between manufacturers. The series spans bore sizes from 10 mm (6200) to 90 mm (6218), with each increment offering a proportionally larger outer diameter and width to accommodate increasing load requirements.

Suffix codes extend the base 6200 bearing designation to define sealing, clearance, and material variants: -2RS indicates rubber seals on both sides, -ZZ indicates metal shields on both sides, -2RZ indicates non-contact lip seals, and suffix C3 indicates extended internal clearance for high-temperature or press-fit applications.

6200 Bearing Load Capacity: Radial and Axial Ratings Explained

Load capacity in the 6200 bearing is expressed as two ISO-standardized values: the basic dynamic load rating (Cr) and the basic static load rating (Cor). These figures define the bearing's performance envelope under rotating and stationary conditions respectively, and they form the basis of all L10 service life calculations.

Deep groove ball bearings in the 6200 series handle combined radial and axial loads without requiring separate thrust bearing elements — a key design advantage that simplifies housing geometry and reduces component count. For purely axial applications or heavy combined loads, angular contact or tapered roller designs are preferred, but for the majority of general machinery applications, the 6200 bearing load envelope is sufficient without modification.

Speed Rating: How Fast Can a 6200 Bearing Run?

Speed performance in the 6200 bearing is defined by two separate limits: the thermal speed rating, which represents the continuous operating speed under normal lubrication conditions, and the mechanical speed limit, which is the absolute maximum imposed by cage dynamics and centrifugal forces on the rolling elements.

Sealed 6200-2RS variants operate at lower speed limits than open or shielded versions due to the additional frictional torque generated by the rubber lip seals. For high-speed applications above 20,000 RPM, open or non-contact-sealed (2RZ) variants with oil mist or jet lubrication are recommended to avoid seal heating and premature grease degradation.

6200 Bearing Service Life: L10 Calculation and Real-World Factors

The ISO 281 L10 life formula calculates the number of operating hours at which 90% of a batch of identical bearings will still be in service. For the 6200 bearing at its rated dynamic load of 5.10 kN and 3,000 RPM, the calculated L10 life is approximately 3,000 hours — but real-world service life is heavily influenced by operating conditions that the basic formula does not capture.

In practice, correctly installed and lubricated 6200 bearing units running at 30–50% of rated load routinely achieve 20,000 to 40,000 operating hours in clean environments — far exceeding the basic L10 calculation. The ISO 281 modified life rating (aISO factor) accounts for lubrication condition, contamination level, and material fatigue limit to produce a more accurate service life prediction for demanding applications.

6200 Bearing Applications Across Industries

The 6200 bearing series is specified across more than 40 distinct industry sectors, from fractional-horsepower motors to agricultural machinery and precision medical devices. Its dimensional range, sealing options, and load versatility make it a universal solution for rotating shaft support in almost any machinery category.

• Electric motors (fractional to 15 kW): The 6200 through 6206 sizes cover the majority of small and medium motor shaft diameters. The 6200-2RS variant is the default specification for totally enclosed fan-cooled motors where contamination ingress is a risk.
• Agricultural equipment: Pumps, gearboxes, seed drills, and harvester augers use 6200-series bearings extensively. C3 clearance variants are specified to accommodate thermal expansion in outdoor operating environments.
• Conveyor systems: Idler rollers, tail shafts, and take-up assemblies use sealed 6200-series bearings that accept moderate radial loads with minimal maintenance intervals in dusty environments.
• Power tools and appliances: Angle grinders, circular saws, washing machines, and vacuum motors use 6200-2Z or 6200-2RS variants for compact, sealed bearing arrangements.
• Automotive auxiliary components: Water pump impeller shafts, alternator rotors, cooling fan assemblies, and power steering pump shafts commonly use 6202 through 6206 sizes.
• Precision instruments: Medical centrifuges, laboratory equipment, and metrology instruments use ABEC-5 or ABEC-7 tolerance class 6200-series bearings where dimensional accuracy and low vibration are critical.

6200 Bearing vs 6000 Bearing: Which Series to Specify

The 6000 and 6200 series are both ISO-standard deep groove ball bearing families, but they differ in their cross-section proportions — and that difference determines which series is appropriate for a given shaft size and load combination. The 6200 bearing has a wider cross-section (larger outer diameter for the same bore) than the 6000 series, providing higher load ratings at the cost of increased envelope dimensions.

The specification rule is straightforward: where housing space permits and load is the dominant requirement, the 6200 bearing delivers superior capacity. Where envelope space is constrained or operating speed is the primary concern, the 6000 series offers a more compact solution with marginally higher speed ratings at equivalent bore sizes.

FAQ: 6200 Bearing

What is the standard bore tolerance for a 6200 bearing?

Standard 6200-series bearings are manufactured to ISO tolerance class Normal (equivalent to ABEC-1), with bore tolerance of 0 to -8 micrometers for bore sizes up to 18 mm and 0 to -10 micrometers for bores from 18 to 30 mm. Higher precision grades — P6 (ABEC-3), P5 (ABEC-5), and P4 (ABEC-7) — are available for applications requiring reduced runout, tighter bore geometry, and lower vibration levels, such as precision spindles, medical centrifuges, and servo motor shafts.

What grease quantity should be used in a 6200-2RS bearing?

Factory-filled 6200-2RS bearings are typically charged with 30–40% of free internal volume with lithium-based or polyurea grease rated to NLGI Grade 2 or 3. For re-greased or open-bearing arrangements, fill to 30–50% of free cavity volume — overfilling causes churning, elevated operating temperature, and accelerated grease degradation. Regreasing intervals in continuous duty applications typically range from 500 to 2,000 hours depending on speed, load, and contamination exposure.

Can 6200 bearings be used in high-temperature environments?

Standard 6200-series bearings with chrome steel (GCr15 or 52100) races are rated for continuous operation up to 120°C. For temperatures between 120°C and 200°C, heat-stabilized (suffix SN or HT) variants with dimensionally stable ring treatment are required to prevent raceway growth. Above 200°C, stainless steel or ceramic hybrid 6200-series bearings with high-temperature grease are specified. Suffix C3 internal clearance is recommended whenever operating temperature exceeds 50°C above ambient to accommodate thermal expansion of the shaft.

What is the difference between 6200-2RS and 6200-2Z?

The 6200-2RS designation indicates rubber contact lip seals on both sides, which provide superior contamination exclusion and retain grease effectively but generate additional frictional torque that limits maximum speed. The 6200-2Z designation indicates pressed steel shields on both sides — non-contact, lower friction, higher speed capability, but with reduced sealing effectiveness against fine dust and moisture ingress. For wet or dusty environments, 6200-2RS is specified. For clean, high-speed applications where minimizing drag torque is important, 6200-2Z is the preferred variant.