HRB Harbin bearing 7312 ACTA P5 P4 DB DF precision machine tool spindle bearing
- Samples:
- 60 mm , 130 mm , 7312 ACTA P5 P4 DB DF$25.50/Piece | 1 Piece (Min. Order) |
Description of bearing accuracy.
Bearing precision refers to the dimension precision and rotation precision of the bearing, while the main difference between high precision and low precision is:
The size deviation of the product with high accuracy grade (inner diameter, outer diameter, ellipse, etc.) is smaller than that of the product with low accuracy grade.
Rotation accuracy requirements are different, the product with high precision grade the rotation accuracy (radial runout, outer diameter to beat, end face a race to beat, etc.) are lower than the accuracy grade of the value of the product requirements should be strictly;
Surface shape and surface quality is not the same as the required value, high precision grade of the surface shape and surface quality (race or surface roughness of the channel, circular deviation, furrowed deviation, etc.) are lower than the accuracy grade of the value of the product requirements should be strictly;
The product with high accuracy grade is superior to the product of general precision grade.
The accuracy grade of the domestic brand bearing is based on the international ISO standard, and the accuracy level is from the P0 level of the common level to P6, P5, P4 and P2. For general purpose P0 stage had enough, and high precision bearing used for high-speed rotation, small friction friction/change, beating and placed high precision machine tool in mechanical or precise instrument.
Description of paired bearings.
Angular contact ball bearings in need under high axial load or two-way axial load when the need to use double row or more matching bearing, commonly used way of pairing with back to back (suffix DB), face-to-face (DF), and the same series (DT).
Note though is the single bearing (with no matching suffix) and paired bearings is the same as in the specification, but the matching parameters such as the width of the bearing outer ring, is has more stringent requirements, and a single bearing just meets the requirements of a single bearing. Therefore, the general single bearing will not be used in combination with the paired bearing. Instead, it USES the universal mating type bearing (suffix DU) to mix and match with the paired bearing.
| No. | No. | No. | Bore | Out Dia | Width |
| d(mm) | D(mm) | B(mm) | |||
| 7210C | 7210AC | 7210B | 50 | 90 | 20 |
| 7211C | 7211AC | 7211B | 55 | 100 | 21 |
| 7212C | 7212AC | 7212B | 60 | 110 | 22 |
| 7213C | 7213AC | 7213B | 65 | 120 | 23 |
| 7214C | 7214AC | 7214B | 70 | 125 | 24 |
| 7215C | 7215AC | 7215B | 75 | 130 | 25 |
| 7216C | 7216AC | 7216B | 80 | 140 | 26 |
| 7217C | 7217AC | 7217B | 85 | 150 | 28 |
| 7218C | 7218AC | 7218B | 90 | 160 | 30 |
| 7219C | 7219AC | 7219B | 95 | 170 | 32 |
| 7220C | 7220AC | 7220B | 100 | 180 | 34 |
| 7221C | 7221AC | 7221B | 105 | 190 | 36 |
| 7222C | 7222AC | 7222B | 110 | 200 | 38 |
| 7224C | 7224AC | 7224B | 120 | 215 | 40 |
| 7226C | 7226AC | 7226B | 130 | 230 | 40 |
| 7228C | 7228AC | 7228B | 140 | 250 | 42 |
| 7230C | 7230AC | 7230B | 150 | 270 | 45 |
| 7232C | 7232AC | 7232B | 160 | 290 | 48 |
| 7234C | 7234AC | 7234B | 170 | 320 | 52 |
| 7236C | 7236AC | 7236B | 180 | 320 | 52 |
| 7238C | 7238AC | 7238B | 190 | 340 | 55 |
| 7240C | 7240AC | 7240B | 200 | 360 | 58 |
| 7244C | 7244AC | 7244B | 220 | 400 | 65 |
Description of bearing accuracy.
Bearing precision refers to the dimension precision and rotation precision of the bearing, while the main difference between high precision and low precision is:
The size deviation of the product with high accuracy grade (inner diameter, outer diameter, ellipse, etc.) is smaller than that of the product with low accuracy grade.
Rotation accuracy requirements are different, the product with high precision grade the rotation accuracy (radial runout, outer diameter to beat, end face a race to beat, etc.) are lower than the accuracy grade of the value of the product requirements should be strictly;
Surface shape and surface quality is not the same as the required value, high precision grade of the surface shape and surface quality (race or surface roughness of the channel, circular deviation, furrowed deviation, etc.) are lower than the accuracy grade of the value of the product requirements should be strictly;
The product with high accuracy grade is superior to the product of general precision grade.
The accuracy grade of the domestic brand bearing is based on the international ISO standard, and the accuracy level is from the P0 level of the common level to P6, P5, P4 and P2. For general purpose P0 stage had enough, and high precision bearing used for high-speed rotation, small friction friction/change, beating and placed high precision machine tool in mechanical or precise instrument.
Description of paired bearings.
Angular contact ball bearings in need under high axial load or two-way axial load when the need to use double row or more matching bearing, commonly used way of pairing with back to back (suffix DB), face-to-face (DF), and the same series (DT).
Note though is the single bearing (with no matching suffix) and paired bearings is the same as in the specification, but the matching parameters such as the width of the bearing outer ring, is has more stringent requirements, and a single bearing just meets the requirements of a single bearing. Therefore, the general single bearing will not be used in combination with the paired bearing. Instead, it USES the universal mating type bearing (suffix DU) to mix and match with the paired bearing.
