Manufactured by CHG Bearing, the 75704301-183JD is a precision Four-Point Contact Ball Slewing Bearings. Key dimensional parameters include a 235 mm bore diameter, a 377 mm outer diameter, and a 55 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.
75704301-183JD - Four-Point Contact Ball Slewing Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | 75704301-183JD |
| Brand | CHG® |
| Gear Type | External Gear |
| Characteristics | |
| Bearing Type | Single-row Four-point Contact Ball Slewing Bearing |
| Row Configuration | Single-row |
| Dimensions | |
| Bore Diameter (d) | 235 mm |
| Width (B) | 55 mm |
| Outer Diameter (D) | 377 mm |
| Number of Lubrication Holes n1 | 2 |
| Mounting Dimensions | |
| Outer Ring Mounting Hole P.C.D. D1 | 358 mm |
| Inner Ring Mounting Hole P.C.D. D2 | 259 mm |
| Lubrication Port Thread / Size Φ1 | 10 |
| Inner Ring Mounting Hole Count n2 | 28 |
| Inner Ring Mounting Hole Specification Φ2 (Ø / Thread) | 13 |
| Outer Ring Mounting Hole Count n3 | 24 |
| Outer Ring Mounting Hole Specification Φ3 (Ø / Thread) | 13 |
| Gear Data | |
| Gear Module m | 4.5 mm |
| Gear Tip Diameter De | 396 mm |
| Number of Gear Teeth z | 88 |
| Gear Face Width b | 37 mm |
| Addendum Modification Coefficient x | 0 |
| Reference Data | |
| Reference Mass (kg) | 27.7 kg |
75704301-183JD 377 mm 358 mm 235 mm 55 mm 259 mm Frequently Asked Questions about 75704301-183JD Four-Point Contact Ball Slewing Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
When fitting 75704301-183JD over a 235 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.
As standard production, CHG Bearing subjects 75704301-183JD to precision bainite or martensite quenching, offering dimensional stability up to 120°C (248°F). For high-heat processing equipment, CHG Bearing also supplies custom S0 (150°C), S1 (200°C), or S2 (250°C) stabilization heat treatments upon request to prevent residual austenite transformation.
Model 75704301-183JD is manufactured by CHG Bearing in standard Normal clearance (CN) for ambient temperature transmission, and C3 or C4 clearance for heavy duty applications. C3 clearance compensates for radial shrinkage caused by tight shaft press-fits (bore 235 mm) and steep thermal gradients between inner and outer rings.
The CHG Bearing 75704301-183JD 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.
