1203
Chrome Steel Self-Aligning Ball Bearings
The 1203 designation defines the size and shape of this ball bearing. Materials, clearances and tolerances can be tailored to your application during quotation — the specifications below are the standard configuration.
Specifications — 1203
Bearing Dimensions
| d (mm) | 17 |
|---|---|
| D (mm) | 40 |
| B (mm) | 12 |
| r min | 0.6 |
Design & Construction
| Serie | Chrome Steel Self-Aligning Ball Bearings |
|---|---|
| Material | GCr15 / AISI 52100 Chrome Steel |
| Bearing type | Ball bearing |
| Weight (ZrO2) | 0.056 |
| Weight (Si3N4) | 0.03 |
| Weight (440C) | 0.073 |
Lubrication & Operating Temperature
- Open version: oil lubrication recommended for maximum speed.
- Sealed version (2RS): maintenance-free grease lubrication.
- Standard greases typically limit continuous operation to about 120 °C; the GCr15 / 52100 chrome steel rings and cage typically permit continuous operation up to about <strong>150 °C</strong> (stabilised grades higher).
- Food-grade (H1) or high-temperature lubrication available on request — contact us.
Typical Applications
Every batch is inspected for dimensional tolerance, noise and vibration levels before shipment.
About the 1203
The 1203 is a Self Aligning Chrome Steel bearing manufactured by ZGBK Bearings (Wuxi, China). It features a bore (inner diameter) of 17 mm, an outer diameter of 40 mm, a width of 12 mm. Built from high-carbon chromium GCr15 / AISI 52100 chrome steel, it delivers high hardness (60–66 HRC), heavy radial and axial load capacity and long rolling-contact fatigue life for demanding industrial applications. Full specifications are listed below.
ZGBK manufactures the 1203 as part of the Chrome Steel Self-Aligning Ball Bearings, using GCr15 / AISI 52100 Chrome Steel for high hardness, load capacity and long service life in general industrial duty. Every batch is inspected for dimensional tolerance, noise and vibration levels before shipment. As a direct factory in Wuxi, China, we support small-batch orders, custom dimensions and fast samples for qualified buyers.