33020 3007120E 33020R Chrome Steel 100*150*39mm Single Row Cone and Cup Tapered Roller Bearings

33020 3007120E 33020R Chrome Steel 100*150*39mm Single Row Cone and Cup Tapered Roller Bearings

The 33020 (standard model), 3007120E (legacy equivalent), and 33020R (KOYO-specific model) single row cone and cup tapered roller bearings are crafted from high-grade 52100 chrome steel (GCr15 equivalent)—a material chosen for its ability to withstand intense stress in compact heavy-duty setups with a 10015039mm footprint (100mm ID, 150mm OD, 39mm width). Through precision quenching and tempering, the steel achieves HRC 58-62 hardness, delivering three core performance advantages:
Exceptional Wear Resistance: Outperforms low-alloy steel bearings by 360-370% in abrasive environments (e.g., metalworking shops with coolant and shavings, agricultural fields with dust). The dense chrome steel microstructure resists particulate erosion that typically reduces standard bearing life by 45-55% .
Robust Impact Toughness: Absorbs sudden load spikes—such as start-stop cycles of 30-40kW motor-driven conveyors or vibration from CNC machining centers—without micro-cracking. This stability is critical for high-cycle applications (2,500+ cycles/day) in manufacturing and construction .
Basic Corrosion Resilience: When paired with anti-rust oil or passivation treatments, it resists humidity-induced rust in semi-outdoor settings (e.g., workshop compressors, small irrigation pumps). This extends maintenance intervals by 35-45% compared to uncoated bearings .
Ideal for 30-40kW electric motors, medium-to-large gearboxes, and heavy-duty precision components, these bearings deliver a service life of 22,000-24,000 operating hours—slashing replacement frequency for compact equipment under continuous heavy loads.

The Shipping Way We Use

We use the main delivery companies are as below

We normally will dispatch your order within 2-7 working days depends on stock level, as soon as the order is shipped, we will list the tracking number on your order detail page, if there is any problem regarding to the shipping, please feel free to contact us. 

Below shows the estimate delivery time for different courier:

- DHL: 10-14 working days 
- FedEx: 7 to 10 working days 
- UPS: 7 to 10 working days 
- EMS: 10-14 working days