Manufactured by CHG Bearing, the 1787/235 is a precision Crossed Roller Slewing Bearings. Key dimensional parameters include a 235 mm bore diameter, a 380 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.
1787/235 - Crossed Roller Slewing Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | 1787/235 |
| Brand | CHG® |
| Gear Type | External Gear |
| Characteristics | |
| Bearing Type | Single-row Crossed Roller Slewing Bearing |
| Row Configuration | Single-row |
| Dimensions | |
| Bore Diameter (d) | 235 mm |
| Width (B) | 55 mm |
| Outer Diameter (D) | 380 mm |
| Inner/Outer Ring Height H1 | 45 mm |
| End-face Height Difference h | 8 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 | ZG1/4 |
| Inner Ring Mounting Hole Count n2 | 27 |
| 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 | 403.5 mm |
| Number of Gear Teeth z | 88 |
| Gear Face Width b | 39 mm |
| Addendum Modification Coefficient x | 0 |
| Reference Data | |
| Reference Mass (kg) | 24 kg |
1787/235 380 mm 235 mm 55 mm 358 mm 259 mm Frequently Asked Questions about 1787/235 Crossed Roller Slewing Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
Model 1787/235 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.
To ensure optimum performance of CHG Bearing 1787/235 Crossed Roller Slewing Bearings under general rotational loads, our application engineers advise an inner-ring shaft tolerance of m5 or k5 for the 235 mm bore. For the 380 mm outer ring, an H7 or J7 housing bore fit is recommended to eliminate creep while accommodating normal thermal gradient expansion.
Each 1787/235 produced in CHG Bearing manufacturing facilities features accurately profiled corner chamfers complying with DIN 5412 / ISO standard corner radii. When designing mating shafts and housing shoulders, machining an undercut or fillet radius strictly within the inner ring clearance limit (235 mm bore side) ensures perfect planar contact without edge binding.
To match diverse operational dynamics, CHG Bearing supplies 1787/235 with multiple cage configurations: high-strength pressed steel ribbon cages for standard duty, solid machined brass cages (M/CA) for heavy vibration and shock loads, or lightweight glass-fiber reinforced polyamide cages (TN9/TVP) for high acceleration and ultra-low noise.
