If you're shopping for replacement bearings in a power transmission setup, you're looking at two very different options: a multi-pack of small 604ZZ bearings and a single industrial bearing. The right pick isn't about which one is cheaper-it's about which one matches the machinery you're fixing.
Quick verdict
Choose the 604ZZ Deep Groove Ball Bearing set if you need small, metal-sealed bearings for compact equipment like gearboxes, fans, printers, or small motors. The set gives you a full pack of bearings, so you can handle multiple repairs without repurchasing. Choose the Timken QAF07046SM if you're working on an industrial power transmission or automation system that needs a single, robust bearing unit.
At a glance
| Aspect | 8 Pcs 604ZZ Deep Groove Ball Bearing | Timken 2 Bolt Bearing QAF07046SM |
|---|---|---|
| Price | USD 17.75 | USD 150.00 |
| Contents | 8 bearings | 1 bearing unit |
| Size | 4mm inner diameter, 12mm outer diameter, 4mm width | 2-bolt industrial bearing unit |
| Best for | Small motors, gearboxes, printers, fans | Power transmission and automation machinery |
Where each wins
- 604ZZ set wins for quantity and versatility: you get multiple small bearings in one pack, ready for a range of compact gear-driven devices.
- Timken QAF07046SM wins for industrial-duty configuration: this bearing unit is built for a power transmission line where one reliable component is worth the higher investment.
Product notes
8 Pcs 604ZZ 4x12x4mm Deep Groove Ball Bearing Metal Sealed Industrial Bearing
At $17.75, this Uxcell set is the lower-priced path to having spare bearings on hand. Every bearing is made from bearing steel with a polished, smooth surface and a metal seal, making it a good fit for lightweight gearboxes, small motors, power tools, household appliances, and garden machinery. With the full pack, you can repair a CNC machine, a remote control car, a printer, a copier, a fax machine, a fan, a mixer, a juicer, a treadmill, a massager, or a reducer without hunting for a single replacement. The trade-off is size: the 4mm bore and 12mm outer diameter are meant for compact shafts, so they won't replace the larger bearing used in heavy industrial equipment.
Timken 2 Bolt Bearing QAF07046SM
The Timken 2 Bolt Bearing QAF07046SM is a single industrial-grade bearing unit designed for mechanical power transmission and industrial automation. At $150.00, it's the more expensive choice by far, but you get a specific configuration with the model number QAF07046SM, so you know exactly what you're installing. It's intended for machinery that needs smooth, long-lasting operation in a production setting, and it's aimed at businesses and industries that rely on efficient bearing operation. The unit is new, and the model number gives you a precise reference for future purchases. The limitation is quantity: one unit for $150 means that if you're replacing bearings at several points on the same line, the total cost adds up quickly.
Final choice by use case
If you're repairing a hobby motor, a small gearbox, a fan, or a copier, the 604ZZ set is the practical, lower-priced pick. If you're maintaining an industrial power transmission line or automation equipment and need a reliable bearing, the Timken QAF07046SM is the unit to buy.
