MRO Field Guide

604ZZ Bearing 8-Pack vs Dunkermotoren BG65X50SI: Which Power Transmission Part Do You Need?

Deciding between an 8-pack of 604ZZ sealed ball bearings and a Dunkermotoren BG65X50SI motor strap feed? This head-to-head compares price, purpose, and condition to help you choose the right part for your power transmission job.

Last updated Aug 17, 2026

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

FeatureUxcell 604ZZ 8-PackDunkermotoren BG65X50SI
Price$17.75$155.00
Part type8 deep groove ball bearingsMotor strap feed
Size/Model604ZZ, 4x12x4mmModel BG65X50SI
BrandUxcellDunkermotoren
ConditionNewNew - Open box
Best forSmall motors, gearboxes, appliancesIndustrial 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

8 Pcs 604ZZ 4x12x4mm Deep Groove Ball Bearing Metal Sealed Industrial Bearing

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

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.
Products in this article
8 Pcs 604ZZ 4x12x4mm Deep Groove Ball Bearing Metal Sealed Industrial BearingUSD 17.75View on eBayNEW BG65X50SI Motor Strap Feed DunkermotorenUSD 155.00View on eBay
8 Pcs 604ZZ 4x12x4mm Deep Groove Ball Bearing Metal Sealed Industrial BearingUSD 17.75View on eBayNEW BG65X50SI Motor Strap Feed DunkermotorenUSD 155.00View on eBay

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