Borelli Support for Group 2 Pumps – 25409 Series
The Borelli Support for Group 2 Pumps – 25409 Series ensures robust and reliable mechanical coupling for Group 2 hydraulic pumps. It features a compact housing, a 17×14 UNI 5482 female splined shaft with an M12x1.5 threaded tapered end, two 6006 radial bearings, UNI 7435-30 Seeger retaining rings, a 30x40x7 shaft seal and an O-ring for static sealing. It supports a maximum permissible load of 100 daN (with a specified radial load of 90 daN).
The available product and component codes are: 25409, 25006.3, AC02/1714, 506006, 903000, 303040, 403200, 601215, 801200, 700365, COPO55.
The pump support belongs to the Borelli technical series designed for mechanical coupling with Group 2 hydraulic pumps. The assembly is built around a machined housing with standardized mounting hole spacing: two 11 mm diameter through-holes (100 mm center-to-center spacing across an 86 mm width) and M10 threaded holes with 71.4 mm center-to-center spacing. The main housing has a depth of 47 mm, with a 25 mm thick mounting flange and a centering dimension of 34.9 mm.
The drive shaft features a 17×14 female internal spline profile compliant with UNI 5482 (geometric concentricity tolerance of 0.08 relative to datum A). The external end features a standard taper with a Woodruff keyway (3×6.5 mm) and an M12x1.5 metric threaded end, secured by an M12 nut and a 12.5 mm diameter washer. The shaft projects 40.4 mm beyond the mounting face, resulting in an overall assembly length of 87.4 mm.
Rotation and dynamic load distribution are managed by two 6006 radial ball bearings. The bearing assembly is axially secured by two UNI 7435-30 Seeger retaining rings and completed by a positioning and centering ring. This dual-bearing configuration enables the support to withstand external stresses with a specified maximum permissible load of 100 daN (with a radial load acting on the shaft of 90 daN).
The integrity of the assembly and protection against leakage and contaminants are ensured by a dual-barrier sealing system: a 30x40x7 mm radial shaft seal mounted on the shaft and a static O-ring seal positioned at the rear flange interface.
| Specification | Value |
|---|---|
| Product Series | Borelli 25409 Series |
| Compatible Pump Group | Group 2 (Gr. 2) |
| Internal Shaft Profile | 17×14 UNI 5482 spline profile |
| External Shaft Thread | M12x1.5 (with M12 nut and 12.5 mm diameter washer) |
| Key / Keyway | 3×6.5 mm key |
| Radial Bearings | 2x 6006 bearings |
| Axial Retaining Rings | 2x Seeger retaining rings UNI 7435-30 |
| Radial Shaft Seal | 30x40x7 mm |
| Static Interface Seal | O-ring |
| Maximum Permissible Load | 100 daN (shaft radial load: 90 daN) |
| Housing and Shaft Dimensions | Overall length 87.4 mm (47 mm housing + 40.4 mm shaft projection) |
| Mounting Hole Spacing | 2 through-holes, dia. 11 mm, 100 mm center-to-center spacing / 2 M10 holes, 71.4 mm center-to-center spacing |
| Geometric Tolerance | Concentricity 0.08 relative to datum A |
| Position | Product Code | Component Description | Quantity |
|---|---|---|---|
| Assembly | 25409 | Complete Support for Group 2 Pumps – 25409 Series | 1 |
| 1 | 903000 | Seeger retaining ring UNI 7435-30 | 2 |
| 2 | 303040 | 30x40x7 shaft seal | 1 |
| 3 | 801200 | Washer, dia. 12.5 mm | 1 |
| 4 | 403200 | O-ring | 1 |
| 5 | 601215 | M12 nut | 1 |
| 6 | 506006 | 6006 bearing | 2 |
| 7 | 25006.3 | Housing | 1 |
| 8 | AC02/1714 | Shaft (17×14 splined) | 1 |
| 9 | 700365 | 3×6.5 key | 1 |
| 10 | COPO55 | Ring | 1 |