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Borelli Splined Coupling Halves with 1:5 Tapered Bore – 10500 Series
The Borelli Splined Coupling Halves with 1:5 Tapered Bore – 10500 Series are precision components designed for hydraulic applications, manufactured from heat-treated UNI 16CrNi4/Pb steel. High-strength versions are manufactured from quenched and tempered UNI 38NiCrMo4/Pb steel with Tenifer nitriding treatment, providing mechanical strength of up to 105 kg/mm². Featuring DIN 5482 B spline profiles, they ensure compatibility with major hydraulic pump coupling standards. The available product codes are: 10501, 10502, 10503, 10504, 10505, 10506, 10518, 10507, 10508, 10509, 10510, 10519, 10511, 10512, 10513, 10514, 10520, 10515, 10516, 10521, 10517, 10522, 10523, 10524.
Borelli Splined Coupling Halves with 1:5 Tapered Bore – 10500 Series
The Borelli Splined Coupling Halves with 1:5 Tapered Bore – 10500 Series are manufactured to ensure maximum reliability in hydraulic power transmission systems. The standard series is manufactured from UNI 16CrNi4/Pb steel, which undergoes specific heat treatments to optimize wear resistance and long-term durability. For applications requiring higher mechanical strength, selected models (product codes 10503 and 10508) are manufactured from quenched and tempered UNI 38NiCrMo4/Pb steel. These models undergo a nitriding treatment (Tenifer), which increases mechanical strength to values ranging from R = 95 to 105 kg/mm², ensuring excellent performance even under demanding operating conditions.
The design of these coupling halves is based on strict dimensional standards. They feature a tapered bore with a taper ratio of 1:5 (Taper Ratio 1:5 / Keilneigung 1:5), ideal for precise centring and uniform torque distribution along the shaft. The splined coupling profile complies with DIN 5482 B standards, ensuring precise tolerances and accurate engagement with the corresponding hydraulic pump shafts. The number of teeth ranges from 12 to 36 depending on the selected size and pump group, allowing different flow rates and torque requirements to be accommodated according to system specifications.
The versatility of the Borelli Splined Coupling Halves with 1:5 Tapered Bore – 10500 Series is reflected in their extensive compatibility with leading hydraulic pump manufacturers, including BOSCH, KRACHT and HPI. The coupling halves are classified according to pump types A, B, C, D and Group 4. They cover a wide range of pump groups, from Group 1 to Group 7/4, accommodating different dimensional configurations and installation requirements. This detailed classification simplifies the selection of the correct component for maintenance operations or the assembly of new hydraulic power units.
| Specification | Value |
|---|---|
| Standard Material | UNI 16CrNi4/Pb steel (heat-treated) |
| High-Strength Material (*) | Quenched and tempered UNI 38NiCrMo4/Pb steel |
| Surface Treatment (*) | Nitriding (Tenifer) |
| Mechanical Strength (*) | R = 95 – 105 kg/mm² |
| Taper Ratio | 1:5 |
| Spline Profile | DIN 5482 B |
| Compatible Pump Manufacturers | BOSCH, KRACHT, HPI |
| Product Code | Pump Type | Pump Group | DIN 5482 B Profile | Number of Teeth |
|---|---|---|---|---|
| 10501 | A | 1 | 20×17 | 12 |
| 10502 | A | 2/1 | 25×22 | 14 |
| 10503 (*) | B | 2 | 25×22 | 14 |
| 10504 | B | 2 | 28×25 | 15 |
| 10505 | A | 2.5/1 | 32×28 | 17 |
| 10506 | B | 2.5/2 | 32×28 | 17 |
| 10518 | C | 2.5 | 32×28 | 17 |
| 10507 | B | 3/2 | 35×31 | 18 |
| 10508 (*) | D | 3 | 35×31 | 18 |
| 10509 | B | 3.5/2 | 40×36 | 20 |
| 10510 | C | 3.5/2 | 40×36 | 20 |
| 10519 | D | 3.5/3 | 40×36 | 20 |
| 10511 | B | 4/2 | 48×44 | 23 |
| 10512 | C | 4/2.5 | 48×44 | 23 |
| 10513 | D | 4/3 | 48×44 | 23 |
| 10514 | Group 4 | 4 | 48×44 | 23 |
| 10520 | B | 5/2 | 58×53 | 27 |
| 10515 | C | 5/2.5 | 58×53 | 27 |
| 10516 | D | 5/3 | 58×53 | 27 |
| 10521 | Group 4 | 5/4 | 58×53 | 27 |
| 10517 | D | 6/3 | 72×66 | 33 |
| 10522 | Group 4 | 6/4 | 72×66 | 33 |
| 10523 | D | 7/3 | 80×74 | 36 |
| 10524 | Group 4 | 7/4 | 80×74 | 36 |