Quick Verdict
The 8 Pcs 604ZZ Deep Groove Ball Bearing Metal Sealed Industrial Bearing and the Delrin Coupler Plastic Sprocket Coupling Chain for Line Shaft Conveyor - Qty 2 do not compete for the same spot in your toolbox. The 604ZZ set is all about replenishing small rotating parts in compact machines. The Delrin coupler two-pack is about making sprocket connections easier to handle. Pick the part that matches the machine you are putting back into service.
Comparison at a Glance
| Product | Price | Quantity | Use For | Price Position |
|---|---|---|---|---|
| 8 Pcs 604ZZ Deep Groove Ball Bearing Metal Sealed Industrial Bearing | $17.75 | 8 bearings | Compact rotating equipment | |
| Delrin Coupler Plastic Sprocket Coupling Chain for Line Shaft Conveyor - Qty 2 | $69.71 | 2 couplers | Sprocket coupling jobs |
Where Each Product Wins
The 604ZZ set wins when the repair needs a 4x12x4mm deep groove ball bearing in a compact machine. The bearing steel construction gives you a polished, wear-resistant surface that suits the kind of low-load rotating parts found in small motors, appliances, and hobby equipment.
The Delrin coupler wins when you want to join sprockets without dealing with a greasy steel chain coupler. The lock-pin design keeps the installation straightforward, and the plastic material is lighter and easier to clean up than a traditional steel alternative.
Closer Look at Each Part
8 Pcs 604ZZ 4x12x4mm Deep Groove Ball Bearing Metal Sealed Industrial Bearing
Working on a small motor, gearbox, or appliance? This set contains eight metal-sealed deep groove ball bearings in the 4x12x4mm size. The inner diameter is 4mm, the outer diameter is 12mm, and the width is 4mm, which makes the bearings suitable for compact rotating parts in CNC machines, remote control cars, printers, copiers, fax machines, fans, mixers, juicers, and treadmills. The bearing steel material is polished to keep rotation smooth and to resist everyday wear. If you maintain several small machines, having eight spares on hand means you can keep going without another trip to the parts bin. The limitation is the fixed dimensions. You must match the 4x12x4mm size to your shaft and housing, and if your equipment needs a larger bore or a wider bearing, this eight-pack will not cover that job. Uxcell is the brand on this bearing set.
Delrin Coupler Plastic Sprocket Coupling Chain for Line Shaft Conveyor - Qty 2
These two Delrin couplers come with lock pins and are built for the common 4016 sprocket size used in line shaft conveyor systems. Installation is clean: align the coupler around the sprocket teeth, start the locking pin into the hole, and compress it through. Because it is made of Delrin rather than steel, the coupler avoids the grease and fiddly small parts that make steel chain couplers a headache. The lock pins are included, so you have what you need for the job in the two-piece set. The limitation is fit specificity. The coupler is designed for a 4016 sprocket setup, so a conveyor with a different sprocket size will need a different coupling solution. If your line shaft conveyor runs on 4016 sprockets, this two-pack gives you a ready-to-install replacement. It is made in the United States.
Final Choice by Use Case
If the machine you are repairing uses small deep groove ball bearings in a compact setup, the 604ZZ bearing set is the practical choice. If you need to connect 4016 sprockets and want a cleaner, simpler install, the Delrin coupler two-pack is the better fit.
