Deep Groove Ball Bearings FAG 6003 -Z

The FAG 6003-Z deep groove ball bearing (17x35x10 mm) features a sheet metal cover on one side, providing protection against dirt whilst allowing lubrication from the open side.

The 6003-Z deep groove ball bearing is a single-row radial ball bearing, manufactured from standard rolling-element bearing steel (100Cr6). Fitted with a dimensionally stable sheet steel cage and standard bearing clearance, this component primarily accommodates radial loads as well as moderate axial loads in both directions. The version with the suffix ‘-Z’ features a non-contacting cover plate made of sheet steel on one side, whilst the opposite side remains open. This design combines basic dust protection with flexible lubricant supply whilst the housing is in operation.

In which installation environments does the 6003-Z deep groove ball bearing prove its worth?

Design engineers and maintenance personnel prefer to use this bearing design in sealed housings and shaft mountings. The single-sided shielding protects the rolling elements from coarse particles from inside the housing, whilst the open side allows for the unhindered replacement of gear oil or relubrication grease. With compact main dimensions of 17 mm internal diameter and 35 mm external diameter, the unit is suitable for medium-speed drives where low friction and smooth running are required.

What function does the single-sided Z-cover plate fulfil during operation?

Compared to abrasive rubber seals, the metallic gap seal of the Z-disc generates no additional frictional torque. The shaft starts up with minimal resistance, which keeps temperature rise low at higher speeds. Installation depends on the specific application: The closed side typically faces the potential source of contamination, whilst the open side is mounted facing the lubricant reservoir. Thanks to tolerance class P0 (normal tolerance), the bearing fits precisely onto standardised shaft seats.