28 models in the 29 series, 10–140 mm bore. Every row links to the full specification page and to the cross-reference page of that model.
| Model | Brand | Bore d (mm) | OD D (mm) | Width B (mm) | |
|---|---|---|---|---|---|
| 2900 | NACHI | 10 | 26 | 12 | Cross-ref → |
| 2901 | NACHI | 12 | 28 | 12 | Cross-ref → |
| 2902 | NACHI | 15 | 31 | 12 | Cross-ref → |
| 2903 | NACHI | 18 | 35 | 12 | Cross-ref → |
| 2904 | NACHI | 20 | 37 | 12 | Cross-ref → |
| 2904-1/2 | NACHI | 22 | 42 | 14 | Cross-ref → |
| 2905 | NACHI | 25 | 45 | 14 | Cross-ref → |
| 2906 | NACHI | 30 | 50 | 14 | Cross-ref → |
| 2907 | NACHI | 35 | 55 | 16 | Cross-ref → |
| 2908 | NACHI | 40 | 60 | 16 | Cross-ref → |
| 2909 | NACHI | 45 | 68 | 16 | Cross-ref → |
| 2910 | NACHI | 50 | 74 | 18 | Cross-ref → |
| 2911 | NACHI | 55 | 78 | 18 | Cross-ref → |
| 2912 | NACHI | 60 | 82 | 18 | Cross-ref → |
| 2913 | NACHI | 65 | 90 | 20 | Cross-ref → |
| 2914 | NACHI | 70 | 95 | 20 | Cross-ref → |
| 2915 | NACHI | 75 | 100 | 20 | Cross-ref → |
| 2916 | NACHI | 80 | 110 | 22 | Cross-ref → |
| 2917 | NACHI | 85 | 115 | 22 | Cross-ref → |
| 2918 | NACHI | 90 | 120 | 22 | Cross-ref → |
| 2919 | NACHI | 95 | 130 | 25 | Cross-ref → |
| 2920 | NACHI | 100 | 135 | 25 | Cross-ref → |
| 2921 | NACHI | 105 | 140 | 25 | Cross-ref → |
| 2922 | NACHI | 110 | 145 | 25 | Cross-ref → |
| 2923 | NACHI | 115 | 150 | 25 | Cross-ref → |
| 2924 | NACHI | 120 | 160 | 27 | Cross-ref → |
| 2925 | NACHI | 125 | 165 | 27 | Cross-ref → |
| 2928 | NACHI | 140 | 185 | 31 | Cross-ref → |
29 series bearings follow the ISO dimension plan for this family, so a given number is dimensionally interchangeable between brands - see the cross-reference to confirm. Choose the suffix for your duty: shields for dry, clean positions, contact seals for wet or dusty ones, and a larger clearance class where the fit or temperature demands it.
Other Self-Aligning Roller Bearings series: 223 · 222 · 230 · 231 · 240 · 232 · 241 · 213