NNU4921-S-K-M-SP
Cylindrical roller bearing
Super precision cylindrical roller bearings NNU49..-S-K-M-SP, non-locating bearing, double row, with tapered bore, taper 1:12, separable, with cage
Replaces
NNU4921SK.M.SP
Description
Metric
Imperial
Main Dimensions & Performance Data
| d | 105 mm | Bore diameter |
| D | 145 mm | Outside diameter |
| B | 40 mm | Width |
| Cr | 130,000 N | Basic dynamic load rating, radial |
| C0r | 260,000 N | Basic static load rating, radial |
| Cur | 34,500 N | Fatigue load limit, radial |
| nG Grease | 5,500 1/min | Limiting speed for grease lubrication |
| nG Oil | 6,500 1/min | Limiting speed for oil lubrication |
| ≈m | 1.95 kg | Weight |
Mounting dimensions
| da | 117 mm | diameter shaft shoulder |
| h12 | diameter shaft shoulder tolerance | |
| Da | 134 mm | diameter of housing shoulder |
| H12 | diameter of housing shoulder tolerance | |
| ra1 max | 1 mm | Maximum recess radius |
Dimensions
| r1 min | 1.1 mm | Minimum chamfer dimension |
| F | 118 mm | Raceway diameter inner ring |
| ns | 6.5 mm | Width of lubricating groove |
| ds | 3.2 mm | Diameter lubrication hole |
| s | 2 mm | Axial displacement |
Temperature range
| Tmin | -30 °C | Operating temperature min. |
| Tmax | 150 °C | Operating temperature max. |
Your current product variant
| Cage | M | Brass Cage |
| Tolerance class | SP | tolerance class SP |
| Bore type | K | Tapered, taper 1:12 |
| Locating Feature , bearing outer ring | S | Lubrication holes and lubrication groove in outer ring |
| Radial internal clearance | C1 | Group 1 (C1) |
| Number of rolling element rows | 2 | Double-row design |
Characteristics
