33115 3007715E 33115R Chrome Steel 75*125*37mm Single Row Cone and Cup Tapered Roller Bearings

33115 3007715E 33115R Chrome Steel 75*125*37mm Single Row Cone and Cup Tapered Roller Bearings

Calibrated for high-speed stability in mid-size heavy-duty setups without overheating, the bearings leverage optimized roller geometry (to minimize sliding friction between rollers and raceways) and ultra-smooth raceways:
Grease Lubrication: Boasts a reference speed of 3,500 rpm, suitable for heavy-duty industrial machine tool spindles, mid-size transmission systems, or aggregate-handling conveyor motors. Lithium-based NLGI Grade 2 grease (infused with anti-oxidation and extreme-pressure additives) forms a durable lubricating film that reduces friction at high speeds, keeping operating temperatures ≤152°C.
Oil Lubrication: Offers a limit speed of 4,500 rpm, ideal for high-speed industrial drills, centrifugal pumps for heavy fluid transfer, or CNC auxiliary shafts. ISO VG 68 mineral oil (or ISO VG 100 for higher load scenarios) enhances heat dissipation, enabling continuous high-speed operation (e.g., 8+ hours/day of heavy-duty lathe use).
Ultra-precision ground raceways (surface roughness: Ra ≤ 0.16μm) and polished tapered rollers (Ra ≤ 0.08μm) minimize centrifugal skidding—even at maximum speed—avoiding noise spikes (≥70dB) or heat buildup (≥160°C) that damage mid-size equipment housings (e.g., industrial gearbox enclosures, heavy-duty motor casings).

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