Manufactured by CHG Bearing, the 172.20.0744.00.00.10 is a precision Four-Point Contact Ball Slewing Bearings. Key dimensional parameters include a 649.2 mm bore diameter, a 816 mm outer diameter, and a 56 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.
172.20.0744.00.00.10 - Four-Point Contact Ball Slewing Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | 172.20.0744.00.00.10 |
| Brand | CHG® |
| Gear Type | Internal Gear |
| Characteristics | |
| Bearing Type | Single-row Four-point Contact Ball Slewing Bearing |
| Row Configuration | Single-row |
| Dimensions | |
| Bore Diameter (d) | 649.2 mm |
| Width (B) | 56 mm |
| Outer Diameter (D) | 816 mm |
| Number of Lubrication Holes n1 | 4 |
| Mounting Dimensions | |
| Outer Ring Mounting Hole P.C.D. D1 | 790 mm |
| Inner Ring Mounting Hole P.C.D. D2 | 705 mm |
| Lubrication Port Thread / Size Φ1 | 8 |
| Inner Ring Mounting Hole Count n2 | 40 |
| Inner Ring Mounting Hole Specification Φ2 (Ø / Thread) | 12 |
| Outer Ring Mounting Hole Count n3 | 40 |
| Outer Ring Mounting Hole Specification Φ3 (Ø / Thread) | 13.5 |
| Gear Data | |
| Gear Module m | 6 mm |
| Gear Tip Diameter De | 660 mm |
| Number of Gear Teeth z | 110 |
| Gear Face Width b | 45.5 mm |
| Addendum Modification Coefficient x | 0 |
| Reference Data | |
| Reference Mass (kg) | 57.2 kg |
172.20.0744.00.00.10 816 mm 649.2 mm 790 mm 705 mm 56 mm Frequently Asked Questions about 172.20.0744.00.00.10 Four-Point Contact Ball Slewing Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
The CHG Bearing 172.20.0744.00.00.10 is rated for limiting speeds up to standard rated RPM under forced oil-mist or circulating oil lubrication regimes. When lubricated with factory-filled synthetic high-speed grease, safe continuous velocity is maintained at approximately 75% to 85% of the maximum nominal limit, preventing thermal runaway.
Built for demanding industrial environments, the 172.20.0744.00.00.10 Four-Point Contact Ball Slewing Bearings by CHG Bearing boasts a dynamic load rating (Cr) of standard dynamic and a static load threshold (C0r) of standard static. The optimized internal raceway geometry balances stress distribution, mitigating edge loading even when operating under peak mechanical stresses.
When fitting 172.20.0744.00.00.10 over a 649.2 mm shaft, CHG Bearing strictly recommends uniform induction heating (controlled between 90°C and 110°C) or precision hydraulic press sleeves. Under no circumstances should direct impact blows be struck against the rings or cage, as shock loads cause brinelling indents and premature spalling.
In its sealed configuration (Open Type), CHG Bearing pre-charges 172.20.0744.00.00.10 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.
