INA
Angular Contact Ball Bearing
From US$16.95
Excl. VAT| Spec | Price | Quantity |
|---|---|---|
| ina:3904-2Z | US$16.95 |
EX-WORKS (Incoterms 2020) Seoul, Korea — Buyer arranges freight, duties, and insurance.
INA 3904-2Z Angular Contact Ball Bearing supports combined radial and one-direction axial load through a defined contact angle. It is a high-speed, high-precision choice for pumps, compressors, machine tools, and spindle-related positions where axial rigidity and rotational accuracy matter.
The inner and outer ring raceways are offset to create a contact angle. Single-row, double-row, or matched arrangements can be used to meet axial load direction, preload, and rigidity requirements.
Select by contact angle, arrangement, preload, precision class, axial load direction, and operating speed.
| Symbol | Value | Description |
|---|---|---|
| d | 20 mm | Bore diameter |
| D | 37 mm | Outside diameter |
| B | 13 mm | Width |
| Cr | 9.100 N | Basic dynamic load rating, radial |
| C0r | 6.800 N | Basic static load rating, radial |
| Cur | 355 N | Fatigue load limit, radial |
| nG | 15.000 1/min | Limiting speed |
| nϑr | 12.100 1/min | Reference speed |
| ≈m | 55 g | Weight |
| Symbol | Value | Description |
|---|---|---|
| rmin | 0,6 mm | Minimum chamfer dimension |
| D1 | 32,85 mm | Shoulder diameter outer ring |
| D2 | 33,45 mm | Caliber diameter outer ring |
| d1 | 27,08 mm | Shoulder diameter inner ring |
| d2 | 24,6 mm | Caliber diamter inner ring |
| a | 18,8 mm | Distance between the apexes of the pressure cones |
| α | 25 ° | Contact angle |
| Item | Code | Description |
|---|---|---|
| Design variant | B | Bearing without filling slot |
| Sealing | 2RZ | Non-contact seal on both sides |
| Cage | TVH | Solid cage made of glass-fiber reinforced polyamide PA66 |
| Tolerance class | PN | Normal (PN) |
| Dimensional / heat stabilization | SN | Rings dimensional stabilized up to 120° |
| Lubricant | GA14 | Ball bearing grease, low noise |
| Axial internal clearance | CN | Group N (CN) |
| Symbol | Value | Description |
|---|---|---|
| da min | 23,2 mm | Minimum diameter shaft shoulder |
| Da max | 33,8 mm | Maximum diameter of housing shoulder |
| ra max | 0,6 mm | Maximum fillet radius |
| Symbol | Value | Description |
|---|---|---|
| Tmin | -20 °C | Operating temperature min. |
| Tmax | 100 °C | Operating temperature max. |
The same part number can be written with or without separators, or in progressive prefix form. We index these common variants so your search reaches this page:
39042Z3904 2Z3904INA39042ZINA 3904 2ZINA3904 2ZINA 39042ZINA3904From US$16.95
Excl. VAT| Spec | Price | Quantity |
|---|---|---|
| ina:3904-2Z | US$16.95 |
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