Manufactured by CHG Bearing, the 021.30.1120 is a precision Double-Row Ball Slewing Bearings. Key dimensional parameters include a 978 mm bore diameter, a 1262 mm outer diameter, and a 124 mm overall width. This component is designed to meet standard load requirements and ensure consistent operational performance. For comprehensive technical evaluation, please explore the detailed specifications, dimensional data, product images, and CAD drawings provided below. A complete PDF data sheet is also readily available for direct download to support your engineering and procurement needs.
021.30.1120 - Double-Row Ball Slewing Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | 021.30.1120 |
| Brand | CHG® |
| Gear Type | External Gear |
| Characteristics | |
| Bearing Type | Double-Row Ball Slewing Bearing |
| Row Configuration | Double Row |
| Dimensions | |
| Bore Diameter (d) | 978 mm |
| Width (B) | 124 mm |
| Outer Diameter (D) | 1262 mm |
| End-face Height Difference h | 29 mm |
| Number of Lubrication Holes n1 | 6 |
| Ring Height H1 | 114 mm |
| Mounting Hole Diameter Φ | 22 mm |
| Performance | |
| Mounting Hole Count n | 36 |
| Tangential Tooth Force, Normalized Z (×10⁴ N) | 10 ×10⁴ N |
| Tangential Tooth Force, Quenched T (×10⁴ N) | 14 ×10⁴ N |
| Mounting Dimensions | |
| Outer Ring Mounting Hole P.C.D. D1 | 1218 mm |
| Inner Ring Mounting Hole P.C.D. D2 | 1022 mm |
| Lubrication Port Thread / Size Φ1 | M10×1 |
| Gear Data | |
| Gear Module m | 10 mm |
| Gear Tip Diameter De | 1318 mm |
| Number of Gear Teeth z | 129 |
| Gear Face Width b | 80 mm |
| Addendum Modification Coefficient x | 0.5 |
| Reference Data | |
| Reference Mass (kg) | 340 kg |
021.30.1120 1262 mm 978 mm 124 mm 1218 mm 1022 mm Frequently Asked Questions about 021.30.1120 Double-Row Ball Slewing Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
Engineered according to international ISO boundary plans, CHG Bearing supplies 021.30.1120 with a precision bore diameter (d) of 978 mm, an outside diameter (D) of 1262 mm, and a nominal ring width (B) of 124 mm. This configuration yields an effective cross-sectional wall thickness of 142.0 mm and an envelope ratio (D/d) of 1.29, delivering compact rigidity for OEM machinery housings.
Yes, 100% of 021.30.1120 Double-Row Ball Slewing Bearings leaving CHG Bearing production lines are subjected to multi-frequency Anderometer sound testing. All units satisfy baseline Z1V1 levels, with dedicated quiet-running electric motor quality (EMQ) lots certified to Z2V2 and Z3V3 standards for silent machinery integration.
To ensure optimum performance of CHG Bearing 021.30.1120 Double-Row Ball Slewing Bearings under general rotational loads, our application engineers advise an inner-ring shaft tolerance of m5 or k5 for the 978 mm bore. For the 1262 mm outer ring, an H7 or J7 housing bore fit is recommended to eliminate creep while accommodating normal thermal gradient expansion.
In its sealed configuration (Open Type), CHG Bearing pre-charges 021.30.1120 with premium wide-temperature lithium-complex or polyurea grease, calibrated to a 30%–35% cavity volume ratio. For open-type variants, synthetic PAO or refined mineral lubricating oils with appropriate EP (Extreme Pressure) additives should be circulated.
