 
| Old No. | 638/3-ZZ |  Two Shields ZZ | |
| Dimensions (metric) | d | 3 | |
| D | 7 | ||
| B | 3 | ||
| Approx. Wgt. lbs | .0008 | ||
| Interchange | ADR | AX3ZZ | |
| ISC | 683ZZS | ||
| Nachi | 683ZZ | ||
| NMB | L-730ZZ | ||
| NTN | W683ZZA | ||
| RMB | ULZ307 | ||
| SKF | AX3ZZ | ||
| 1)  Also available with one shield - suffix “Z”. No change in width dimensions. | |||
| Model No. | Inner Diameter | Outer Diameter | Width | Brand | Type | 
| 108 | 8 | 22 | 7 | NSK | Self-Aligning Ball Bearings | 
|---|---|---|---|---|---|
| 16005 | 25 | 47 | 8 | NSK | Deep Groove Ball Bearings | 
| 22315EG15KW33 | 75,000 | 160,000 | 55,000 | SNR | Thrust Roller Bearings | 
| 23130-MB-W33 | 150 | 250 | 80 | NKE | Spherical Roller Bearings | 
| 231SM380-MA | 380 | 650 | 200 | FAG | Spherical Roller Bearings | 
| 32936 | 180 | 250 | 45 | ISB | Tapered Roller Bearings | 
| 3NC6008MD4 | 40 | 68 | 15 | KOYO | Deep Groove Ball Bearings | 
| 51336 | 180 | 300 | 95 | NACHI | Thrust Ball Bearings | 
| 5200A-2NS | 10 | 30 | 14.3 | NACHI | Angular Contact Ball Bearings | 
| 6206NR | 30 | 62 | 16 | NTN | Deep Groove Ball Bearings | 
| 6911-RS | 55 | 80 | 13 | CYSD | Deep Groove Ball Bearings | 
| 7919DF | 95 | 130 | 18 | NTN | Angular Contact Ball Bearings | 
| CRD-6148 | 305 | 500 | 200 | NTN | Tapered Roller Bearings | 
| G1009KLLB | 14,2875 | 40 | 27,78 | Timken | Deep Groove Ball Bearings | 
| SL11-924 | 120,000 | 165,000 | 66,000 | NTN | Cylindrical Roller Bearings | 
| TP75100 | 75 | 100 | 4 | KOYO | Needle Roller Bearings | 
| UCC211-35 | 55,5625 | 55,6 | FYH | Bearing Units | |
| VEX 9 /NS 7CE1 | 9 | 24 | 7 | SNFA | Angular Contact Ball Bearings | 
| RMS-29 | 11.0000 | 20.0000 | 3.5000 | CONSOLIDATED | CYLINDRICAL ROLLER BEARINGS | 
| LER-121 | 4.8750 | 25.37 | CONSOLIDATED | TRIPLE RING ALUMINUM SEALS FOR SAF TYPE PILLOW BLOCKS | 
Hot number:KOYO 52424 FAG 61807 SNR 6209EE Timken 9120K SKF D/W R2 R-2RS1 ISO DAC42820037 INA K89448-M NTN NU419 SKF PCMW 223801.5 M NBS SCW 50 AS INA TWA2031 IKO AZ557816 NMB SSR1560ZZ MRC 103-KSFFG Sealmaster SFT-14 NTN 22226BK FBJ 23140K NTN 4T-25877/25821 ISB 6210-2RS CX 71936 ATBP4 CX CX519 INA K40X45X13 INA NN3076-AS-K-M-SP CX NUP3312 SKF RNA6902 KOYO UCF313-40 Thomson SR8 Nachi F6M12ZZ NTN F624ZZ SKF (Old No.) XRK12015504
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