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6209 Deep Groove Ball Bearing 45x85x19mm
The 6209 bearing is the 45mm-bore deep groove ball bearing in the 6200 heavy series — the last size in the series where a single deep groove bearing commonly serves as the sole drive-end support before designers transition to cylindrical roller bearings for higher radial loads. At 85mm OD and 19mm width, it carries 32.7 kN dynamic load with nine 12.7mm balls, spanning IEC frame 180 through 200 motors from 15 kW to 18.5 kW. The step up from the 6208 bearing where shaft diameter crosses 40mm — a common transition point for industrial pump shafts, medium-duty gearbox output shafts, and heavy conveyor drive pulleys. GCr15 bearing steel, ABEC-1 or ABEC-3 precision, and three sealing configurations.
Key Specifications
Sealing: Open, ZZ metal-shielded, or 2RS double rubber-sealed configurations. ZZ shields maintain 7,800 RPM without friction penalty. 2RS nitrile seals for wet, washdown, or outdoor industrial environments at 5,100 RPM.
Speed and Load: 7,800 RPM in open and ZZ configurations; 5,100 RPM in 2RS sealed. 32.7 kN dynamic load (Cr) and 20.5 kN static load (Cor) at standard CN clearance. Nine 12.7mm balls per row — same ball diameter as the 6208 bearing, with increased load capacity from the larger pitch diameter at 85mm OD.
Material and Precision: Rings and balls in GCr15 bearing steel (AISI 52100 equivalent), through-hardened to HRC 60–64. Standard ABEC-1 and ABEC-3 precision grades. 100% dimensional inspection with batch-traceable reports.
Operating Direction: Single-row deep groove geometry absorbs combined radial and bidirectional axial loads. Axial capacity approximately 25 percent of radial dynamic rating — adequate for locating bearing duty on industrial pump, gearbox, and conveyor drive shafts up to 18.5 kW.
Temperature Range: Standard polyurea grease rated -20°C to 120°C continuous. High-temperature synthetic grease and FKM seal options to 180°C for OEM orders.
For any inquiries, please contact with our Supporting Team at sales@yuanhecd.com.
| Model | 6209 |
| Type | Open / ZZ Shielded / 2RS Sealed |
| Bore (d) | 45 mm |
| OD (D) | 85 mm |
| Width (B) | 19 mm |
| Dynamic Load Cr | 32.7 kN |
| Static Load Cor | 20.5 kN |
| Max Speed | 7,800 RPM (Open/ZZ) / 5,100 RPM (2RS) |
| ABEC | ABEC-1 / ABEC-3 |
6209 bearing: the 45mm-bore deep groove ball bearing in the 6200 heavy series. At 85mm OD and 19mm width, 32.7 kN dynamic load with nine 12.7mm balls. The last size where a single deep groove bearing commonly serves as the sole drive-end support before designers transition to cylindrical roller bearings. Spans IEC frame 180-200 motors from 15 kW to 18.5 kW. The step up from the 6208 bearing where 45mm shaft diameter becomes the standard for industrial motors above 15 kW.
Bore x OD x Width
45 x 85 x 19 mm
Dynamic Load Cr
32.7 kN
Static Load Cor
20.5 kN
Max Speed
7,800 RPM
Sealing
Open / ZZ / 2RS
Precision
ABEC-1 / ABEC-3
Shielding and Lubrication
The 6209 bearing ships in three configurations. Open bearings suit oil-bath, circulating-oil, or oil-mist lubrication at the full 7,800 RPM speed rating. ZZ metal shields use non-contact SPCC steel covers pressed into the outer ring, forming a labyrinth gap that blocks workshop debris, belt dust, and airborne contamination without friction penalty; speed remains 7,800 RPM.
2RS rubber seals employ nitrile (NBR) contact lips riding on the inner ring shoulder. Seal friction reduces the speed rating to 5,100 RPM. At 85mm OD — the largest seal contact diameter in the 6200 series below 6210 — the seal friction torque reaches 20 to 30 watts per bearing at 3,600 RPM. For IE3 premium-efficiency motors where the total loss budget is tight, the recommended configuration is ZZ shields with a non-contact labyrinth seal integrated into the motor end bell, providing IP5X protection with zero seal friction.
Factory fill is polyurea-thickened mineral grease at 25 to 30 percent. The 19mm width and 85mm OD provide approximately 17.8 cmu00b3 of grease capacity. For mining conveyor pulleys, a lithium-complex grease with MoSu2082 EP additives resists water washout. For food-processing washdown, 440C stainless steel rings and FKM seals are available. For high-temperature industrial fan applications, fluorinated grease with PTFE thickener supports 180u00b0C intermittent with an open configuration and machined brass cage.
Performance
The 6209 bearing delivers 32.7 kN dynamic load and 20.5 kN static load. Nine 12.7mm balls — same diameter as the 6208 bearing — run at a larger pitch diameter (approximately 65mm vs 60mm) due to the 85mm OD. The larger pitch circle increases the number of balls in the loaded zone at any instant, contributing 12 percent to the dynamic load increase over the 6208 bearing. The 32.7 kN rating supports belt-tension side loads up to approximately 8.2 kN at a 1.2 service factor.
Against the 6009 bearing — same 45mm bore — the 6209 bearing adds 10mm OD (85mm vs 75mm) and 3mm width (19mm vs 16mm) for a 55 percent increase in dynamic load capacity (32.7 vs 21.1 kN). In an 18.5 kW belt-driven industrial fan at 1,450 RPM with 6.5 kN radial load, the 6209 bearing delivers approximately 28,000 hours L10 versus 11,000 hours for the 6009 bearing.
Compared to the 6208 bearing (40x80x18mm, 29.1 kN), the 6209 bearing steps up to 45mm bore with a 12 percent load gain. Both share the 12.7mm ball diameter, but the larger pitch circle distributes load across more rolling elements. Against the 6309 bearing (45x100x25mm, 52.7 kN), the 6209 bearing saves 15mm OD and 6mm width while retaining 62 percent of the load capacity.
OEM and Customization
Yuanhe supplies the 6209 bearing with full customization. Standard internal clearance is CN. C3 for motor drive-end and gearbox applications. C2 for machine tool spindles. C4 and C5 for press-fit housings and high thermal gradients. Grease options: standard polyurea, low-noise polyurea, fluorinated to 180u00b0C, NSF H1 food-grade. Stainless steel 440C available; dynamic load decreases to approximately 26.2 kN. Cage materials: PA66, machined brass, pressed steel. Z2/V2 and Z3/V3 noise sorting available. Standard lead time 7 to 15 days. Submit your specification or drawing for a quote.
Applications
Electric motors from 15 kW to 18.5 kW (IEC frame sizes 180-200), industrial fan and blower drive-end and non-drive-end bearings, centrifugal and split-case pump impeller and motor shaft bearings, air and refrigerant compressor crankshaft and motor shaft bearings, industrial gearbox intermediate and output shaft bearings, heavy conveyor head and tail pulley bearings, automotive alternator and water pump bearings in heavy-duty and off-highway applications, machine tool spindle and feed-axis support bearings, agricultural combine harvester and forage harvester shaft bearings, textile spinning frame and loom drive shaft bearings, material handling roller and idler bearings, HVAC air-handling unit and industrial oven recirculation fan shaft bearings, dryer drum support roller bearings, and belt-conveyor drive, snub, and bend pulley bearings. Any application requiring a 45mm shaft within an 85mm housing bore.
Frequently Asked Questions
What is the difference between the 6209 bearing and the 6009 bearing? +
Both fit a 45mm shaft. The 6209 bearing measures 85mm OD x 19mm width with 32.7 kN dynamic load. The 6009 bearing measures 75mm OD x 16mm width with 21.1 kN dynamic load — 55 percent less capacity. In an 18.5 kW belt-driven fan at rated load, the 6209 bearing delivers more than double the L10 life of the 6009 bearing. Choose the 6009 bearing when housing diameter is the binding constraint. Choose the 6209 bearing when drive-end loads and fatigue life are the primary specification drivers.
How does the 6209 bearing compare to the 6208 bearing when both use the same 12.7mm balls? +
Both bearings use nine 12.7mm balls, but the 6209 bearing runs them at a larger pitch diameter (approximately 65mm vs 60mm) due to its 85mm OD versus the 80mm OD of the 6208 bearing. The larger pitch circle increases the number of balls simultaneously in the loaded zone, distributing the applied radial force across more rolling elements. This contributes approximately 12 percent to the dynamic load increase (32.7 vs 29.1 kN). The 6209 bearing is the choice when a 45mm shaft is required — the standard shaft diameter for motors above 15 kW.
What is the seal friction penalty for a 6209 2RS bearing in an IE3 motor? +
At 85mm OD, the 6209 bearing has the largest seal contact diameter in the 6200 series below 6210. At 3,600 RPM, NBR contact seals consume approximately 20 to 30 watts per bearing — roughly 0.3 percent of an 18.5 kW motor output for a bearing pair. For IE3 premium-efficiency motors, the recommended configuration is ZZ shields with a non-contact labyrinth seal integrated into the motor end bell. This eliminates seal friction entirely and provides IP5X-level contamination protection.
At what point should I step up from a 6209 bearing to a cylindrical roller bearing? +
The 6209 bearing at 32.7 kN represents the practical upper limit for a deep groove ball bearing as the sole drive-end support. Consider a cylindrical roller bearing (NU or N series) when: (1) radial load exceeds 16.3 kN (50 percent of Cr) — fatigue life shortens to a service-replacement interval; (2) shaft speed exceeds 3,600 RPM with combined radial and axial loading — separate load paths improve reliability; (3) the application requires a separable inner ring for ease of mounting on long shafts. Cylindrical roller bearings carry 1.5 to 2 times the radial load of an equivalent-size deep groove ball bearing but require a separate thrust bearing for axial load management.
