Choosing between an 8-pack of tiny sealed bearings and a complete motor strap feed comes down to which component your power transmission job actually needs. The Uxcell 604ZZ 8-Pack Deep Groove Ball Bearings is a $17.75 set of eight 4x12x4mm bearings for small rotating parts. The Dunkermotoren BG65X50SI Motor Strap Feed is a $155.00 motor feed with a specific model number for industrial automation and motion control. These are not interchangeable parts, so the buying decision starts with matching the part to the repair.
Quick Verdict
If you need to replace small 4x12x4mm deep groove bearings, get the Uxcell 604ZZ 8-Pack at $17.75. If you need a Dunkermotoren motor strap feed with a model number for an industrial motion control setup, get the BG65X50SI at $155.00.
At a Glance
| Feature | Uxcell 604ZZ 8-Pack | Dunkermotoren BG65X50SI |
|---|---|---|
| Price | $17.75 | $155.00 |
| Part type | 8 deep groove ball bearings | Motor strap feed |
| Size/Model | 604ZZ, 4x12x4mm | Model BG65X50SI |
| Brand | Uxcell | Dunkermotoren |
| Condition | New | New - Open box |
| Best for | Small motors, gearboxes, appliances | Industrial automation, motion control |
Where Each Part Wins
- Price: The Uxcell 604ZZ 8-pack costs $17.75, which is much less than the $155.00 Dunkermotoren motor strap feed.
- Purpose: If the job is a small bearing replacement, the 8-pack is the clear fit. If the job is a motor strap feed, the BG65X50SI is the part designed for it.
- Condition and model: The bearing set is listed as new, while the motor feed is listed as new open box and carries the model number BG65X50SI.
Product Notes
Uxcell 604ZZ 8-Pack Deep Groove Ball Bearings

The 8-pack of 604ZZ deep groove ball bearings is sized at 4mm inner diameter, 12mm outer diameter, and 4mm width, making it a good match for miniature gearboxes, small motors, power tools, household appliances, and garden machinery. Each bearing uses bearing steel and metal seals, so you get eight pieces that are ready for use in equipment that calls for this size. At $17.75, the set is the lower-priced option and gives you multiple spares in one purchase. The condition is new. The limitation is that this pack is only for the 604ZZ size, and it includes a California Prop 65 warning, so make sure the 4x12x4mm size fits your application before you order.
NEW BG65X50SI Motor Strap Feed Dunkermotoren

The Dunkermotoren BG65X50SI is a motor strap feed built for industrial automation and motion control. It has a specific model number, so it is a straightforward choice when your equipment specifies a BG65X50SI. The price is $155.00, making it the higher-cost part in this comparison, but it is a complete motor feed rather than a collection of loose bearings. The condition is listed as new open box. If your system needs this Dunkermotoren model, the concrete model ID and the motor feed design are the reasons to choose it. The trade-off is the higher price and the open-box condition.
Final Choice by Use Case
- Small bearing replacement: Choose the Uxcell 604ZZ 8-Pack at $17.75.
- Industrial motor strap feed: Choose the Dunkermotoren BG65X50SI at $155.00.
- Bearings only: If the repair calls for 604ZZ bearings and nothing else, the 8-pack is the lower-cost buy.