Single-row cylindrical roller bearings
NU3188 Cylindrical Roller Bearing Dimensions & Specifications
NU3188 cylindrical roller bearing: 440 mm bore (d), 720 mm outside diameter (D), 226 mm width (B). Review the available technical values below. Matching dimensions alone do not confirm interchangeability between designations or suffixes.
Technical specifications
| Bore d | 440 mm |
|---|---|
| Outside diameter D | 720 mm |
| Width B | 226 mm |
| Mass | 374 kg |
| Catalogue dynamic load Cr | 4750 kN |
| Catalogue static load Cor | 9800 kN |
| Grease-lubricated speed grease | 700 rpm |
| Oil-lubricated speed oil | 850 rpm |
Mounting dimensions & additional parameters (7)
| Abutment dimension Da Da | 700 mm |
|---|---|
| Abutment dimension db db | 480 mm |
| Minimum chamfer r12 r12 | 6 mm |
| Minimum chamfer r34 r34 | 6 mm |
| Maximum fillet ra ra | 5 mm |
| Maximum fillet rb rb | 5 mm |
| Roller envelope diameter Fw Fw | 508 mm |
Fields without confirmed values are omitted. Final supply configuration and application suitability require technical confirmation.
Selection & installation
Which mounting dimensions are listed for NU3188?
The NU3188 catalogue lists Da = 700 mm; ra ≤ 5 mm. Check these symbols against the bearing drawing and the shaft/housing shoulders; they are not shaft or housing fit tolerances.
What speed values are available for NU3188?
The listed values for NU3188 are grease: 700 rpm; oil: 850 rpm. These catalogue references do not determine a safe operating speed on their own. Confirm load, clearance, lubrication and heat conditions for the application.
What is the reference mass of NU3188?
The catalogue reference mass for NU3188 is 374 kg. Confirm the supplied assembly and packed shipment weight separately when planning handling or transport.