Borelli SAE A Support for Group 3 Pumps – 25607 Series
The Borelli SAE A Support for Group 3 Pumps – 25607 Series is designed to ensure maximum stability and precision in hydraulic power transmission systems. Featuring a robust housing, the assembly withstands radial and axial loads of up to 318 daN. The unit incorporates a shaft with a nominal diameter of 40 mm, a high-performance 3208A bearing to absorb mechanical stresses, and a complete sealing system to protect the hydraulic circuit against contamination.
The available product codes (series components) are: 25003/C.1, 303545, 403200, 401740, 700610, 503208, 25007.1, 904000, AC 25.4.
The Borelli SAE A Support for Group 3 Pumps – 25607 Series is an advanced structural and mechanical solution specifically developed for integration into modern hydraulic systems. The main component housing is identified by code 25007.1. The mounting dimensions include a horizontal hole center-to-center distance of 120 mm and an overall housing height of 126 mm, providing a compact yet highly rigid mounting base. Flange centering is ensured by a 50.75 H7 fit tolerance, essential for precise alignment between the motor and the hydraulic pump. The primary transmission component is the 40 mm diameter shaft (code AC 25.4), featuring a usable projection and a 25.4 mm end connection (fE), supported by a high-strength 3208A radial bearing (code 503208). Axial stability of the entire rotating assembly is ensured by two Seeger retaining rings compliant with UNI 7435-40 (code 904000). To ensure proper torque transmission without mechanical slippage, the shaft also features a 6×10 keyway compliant with UNI 6606 (code 700610).
In hydraulic applications, preventing fluid contamination and ensuring optimal internal lubrication are critical requirements. For this reason, the system incorporates multiple sealing components directly within the housing structure. The sealing assembly includes a primary radial shaft seal measuring 35x45x7 mm (code 303545), working in conjunction with two specific O-rings (codes 403200 and 401740) and an additional retaining ring (code 25003/C.1) to seal the metal interfaces. External mechanical mounting connections are facilitated by four M10 threaded holes, while the internal shaft profile geometry is designed to accommodate A 35×31 spline profiles, providing a standardized and widely compatible interface.
The entire assembly is designed to withstand substantial directional loads, vibrations and thrust forces typical of mobile and industrial machinery applications. The technical design specifications highlight the structure’s high capacity to withstand demanding vector loads applied directly to the shaft and transferred to the housing. Engineering tests confirm nominal load capacities of 318 daN and 245 daN acting on the main shaft, together with the ability to withstand a transverse load of 140 daN in the front support area. These specifications make the product an essential component for protecting the service life of connected hydraulic pumps.
| Specification | Value |
|---|---|
| Product Series | 25607 |
| Pump Group / Standard | Group 3 / SAE A |
| Flange Seat Tolerance | 50.75 H7 |
| Shaft Diameter / Profile | Dia. 40 mm / A 35×31 compatible profile |
| Shaft End Diameter | 25.4 mm (fE) / M8 thread |
| Hole Center-to-Center Dimensions | 120 mm / 98 mm / 106 mm (external) |
| Supported Vector Loads | 318 daN, 245 daN, 140 daN |
| Flange Fastening | M10 |
| Component / Description | Product Code | Quantity per Assembly |
|---|---|---|
| Housing | 25007.1 | 1 |
| Shaft, dia. 40 mm | AC 25.4 | 1 |
| 3208A bearing | 503208 | 1 |
| 35x45x7 shaft seal | 303545 | 1 |
| Standard ring | 25003/C.1 | 1 |
| O-ring (1) | 403200 | 1 |
| O-ring (2) | 401740 | 1 |
| 6×10 key UNI 6606 | 700610 | 1 |
| Seeger retaining ring UNI 7435-40 | 904000 | 2 |