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

Shandong Star Create Bearings Technology Co., Ltd.
1. Corporate background and production strength
Twenty years of deep cultivation in the industry
Founded in 2000, the company focuses on bearing research and development and manufacturing, has more than 20 years of technical accumulation, and completed the upgrade of the modern production base in 2020.
Scaled production guarantee
The new factory is located in Guangtao County Bearing Creative Industrial Park, covering an area of ​​27,000 square meters, with a registered capital of 5 million yuan, equipped with advanced production lines, and an annual production capacity covering millions of sets of high-precision bearings.

2. Core product technology matrix
The company focuses on the mid-to-high-end bearing market and focuses on four major categories of products:
High-precision tapered roller bearings
Applicable to heavy-duty machinery, engineering vehicles and other fields, with high speed and impact resistance.
Automobile hub unit bearings
Meet the lightweight needs of new energy vehicles and passenger cars, and the integrated design reduces maintenance costs.
Deep groove ball bearing series
Covering civilian industrial scenarios such as home appliances and motors, with industry-leading silent performance and service life.
Thrust ball bearing solutions
For axial load Load scene optimization, widely used in precision transmission systems such as machine tool spindles and gearboxes.

3. Flexible customization service capabilities
Multi-brand OEM system
Supports the production of international standards (such as SKF, NSK) or independent brand bearings according to customer needs, covering ISO, DIN, JIS and other certification systems.
Quick response mechanism
The delivery cycle from drawing design to sample delivery is compressed to 15-30 days, providing customized services such as material selection (chrome steel/ceramic) and lubrication solutions.

4. Industry positioning and development strategy
As a representative enterprise of bearing industry upgrading in North China, the company is driven by "technology research and development + intelligent manufacturing":
Investment in the construction of an intelligent testing center, and the yield rate of key processes has increased to 99.3%
Layout of bearing research and development in emerging fields such as rail transit, wind power and new energy
Build a global sales network, and products are exported to Europe, the United States, and Southeast Asian markets

Company vision: to create a benchmark for China's precision bearing intelligent manufacturing and help the localization substitution process of high-end equipment.