| Structure | Single row deep groove ball bearings |
| Brand Name | CHIK / OEM / Be customized |
| Series | 6300 series deep groove ball bearing |
| Seals Type | Z; ZZ; RS; 2RS; RZ; OPEN |
| Ring Material | Chrome Steel/Stainless Steel/Carbon Steel |
| Hardness | HRC60~HRC65 / 304C or 440C / HRC50-55 |
| Steel Pressed Cage | Bending claw form or rivet form |
| Material of Cage | SPCC / Nylon /Brass |
| Surface | Smooth and Antirust |
| Tolerance Grade | GB/T307.1-205 |
| Precision Rating | ABEC1(P0) / ABEC3(P6) / ABEC5(P5) / ABEC7(P4) |
| Vibration/Noise Level | Z1/V1; Z2/V2; Z3/V3 |
| Clearance | C2; C0; C3; C4 |
| Grease /Oil | As your requirement |
| Subject | Symbol | Description |
| Seal type | ZZ | Metal shields on both sides. |
| 2RS | Rubber seals on both sides. | |
| Z | Metal shield on one side. | |
| RS | Rubber seal on one side. | |
| Radial internal clearance | C2 | Less than normal. |
| CN | Normal clearance. Is not indicated as a standard. | |
| C3 | Greater clearance than normal. | |
| C4 | Greater than C3. | |
| C5 | Greater than C4. | |
| Other technical modifications | NR | Groove with inserted snap ring in outer ring. |
| N | Snap ring groove in the outer ring. | |
| SS | Stainless steel. | |
| Cage type | M | Brass cage ball guided. |
| MB | Brass cage, inner ring centered. | |
| MA | Brass cage, outer ring centered. | |
| Speed ratings | V | Normal vibration level. Is not indicated as a standard. |
| V2 | Lower vibration level than normal. | |
| V3 | Lower vibration level than V2. | |
| V4 | Lower vibration level than V3. | |
| Tolerances | P0 | Normal tolerance level. Is not indicated as a standard. |
| P6 | Greater tolerance level than P0. | |
| P5 | Greater tolerance level than P6. |
| I SO | GOST | Dimensions (mm) | Basic Load Rating (N) | Limitting speed ( r/min ) | Weight | ||||
| Lubrication | |||||||||
| d | D | B | Dyn. C | Stat. C0 | Grease | Oil | |||
| 6306 | 306 | 30 | 72 | 19 | 28100 | 16000 | 10000 | 12000 | 0.36 |
| 6306 ZZ | 80306 | 30 | 72 | 19 | 28100 | 16000 | 10000 | 12000 | 0.36 |
| 6306 2RS | 180306 | 30 | 72 | 19 | 28100 | 16000 | 6300 | - | 0.36 |
| 6307 | 307 | 35 | 80 | 21 | 33200 | 19000 | 8800 | 10000 | 0.467 |
| 6307 ZZ | 80307 | 35 | 80 | 21 | 33200 | 19000 | 8800 | 10000 | 0.467 |
| 6307 2RS | 180307 | 35 | 80 | 21 | 33200 | 19000 | 6000 | - | 0.467 |
| 6308 | 308 | 40 | 90 | 23 | 41000 | 24000 | 7800 | 9200 | 0.64 |
| 6308 ZZ | 80308 | 40 | 90 | 23 | 41000 | 24000 | 7800 | 9200 | 0.64 |
| 6308 2RS | 180308 | 40 | 90 | 23 | 41000 | 24000 | 5000 | - | 0.64 |
| 6309 | 309 | 45 | 100 | 25 | 52700 | 31500 | 7000 | 8200 | 0.843 |
| 6309 ZZ | 80309 | 45 | 100 | 25 | 52700 | 31500 | 7000 | 8200 | 0.843 |
| 6309 2RS | 180309 | 45 | 100 | 25 | 52700 | 31500 | 4500 | - | 0.843 |
| 6310 | 310 | 50 | 110 | 27 | 61800 | 38000 | 6400 | 7500 | 1.097 |
| 6310 ZZ | 80310 | 50 | 110 | 27 | 61800 | 38000 | 6400 | 7500 | 1.097 |
| 6310 2RS | 180310 | 50 | 110 | 27 | 61800 | 38000 | 4300 | - | 1.097 |