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Borelli DIN and SAE Pump Coupling Halves – 35000 and 35500 Series
The Borelli DIN and SAE Pump Coupling Halves – 35000 and 35500 Series are highly reliable components manufactured from heat-treated UNI 16CrNi4/Pb steel. Designed to withstand severe mechanical stresses, they are also available in optional versions manufactured from quenched and tempered UNI 38NiCrMo4/Pb steel with Tenifer nitriding treatment, providing a mechanical strength of R = 95–105 kg/mm². They ensure highly precise connections in hydraulic systems, strictly complying with DIN 5482 standards (35000 Series) and SAE standards (35500 Series). The available product codes are: 35001, 35002, 35003, 35004, 35005, 35006, 35007, 35008, 35009, 35010, 35011, 35012, 35501, 35502, 35503, 35504, 35505, 35506, 35507, 35508, 35509, 35510, 35511.
Borelli DIN and SAE Pump Coupling Halves – 35000 and 35500 Series
The Borelli DIN and SAE Pump Coupling Halves – 35000 and 35500 Series provide an ideal solution for hydraulic applications, designed to ensure maximum power transmission efficiency. The standard construction of these splined coupling halves uses UNI 16CrNi4/Pb steel, which undergoes rigorous heat treatment to ensure durability and wear resistance during continuous operating cycles. For applications requiring superior mechanical performance, the range includes variants manufactured from quenched and tempered UNI 38NiCrMo4/Pb steel. This optional configuration undergoes an advanced nitriding process, commonly known as Tenifer treatment, which increases mechanical strength to values ranging from R = 95 to 105 kg/mm².
The 35000 Series is engineered to comply strictly with DIN 5482 standards, offering a wide range of splined connections for hydraulic pumps. The range is organized into several size groups: 3 C, 3.5 C, 4 C, 5 C and 6 C. These coupling halves feature internal spline profiles with dimensions ranging from 35×31 to 72×66 on the primary side, combined with a number of teeth ranging from a minimum of 18 to a maximum of 33. The dimensional configurations on side B feature DIN 5482 spline profiles ranging from 25×22 (14 teeth) to 50×45 (24 teeth), ensuring precise mechanical compatibility with pump shafts of different sizes and tolerances.
The 35500 Series complies with SAE specifications, which are essential for applications involving internationally manufactured machinery and hydraulic components. This series includes groups 3 A, 3 B, 3.5 A, 3.5 B, 4 D, 4 B, 4 A, 5 B and 5 D. The main technical difference lies in side B of the coupling, which features Diametral Pitch (DP) spline profiles typical of SAE standards. The models offer 16/32″ DP profiles (with 13, 15, 21 or 23 teeth) and 12/24″ DP profiles (with 14 teeth), ensuring precise, low-backlash connections and smooth torque transmission within hydraulic systems.
Borelli splined coupling halves play an essential role in the safe and reliable operation of hydraulic components. Their dimensional specifications, detailed from dimension C (overall length) to dimension H, provide optimized overall dimensions, with lengths (dimension C) ranging from a minimum of 26 mm to a maximum of 72 mm and external diameters suited to different installation spaces. The reliability of these couplings helps prevent misalignment and vibration, reducing premature wear on connected pumps and extending the service life of the entire system.
| Specification | Value |
|---|---|
| Standard Base Material | Heat-treated UNI 16CrNi4/Pb steel |
| Optional Material | Quenched and tempered UNI 38NiCrMo4/Pb steel |
| Optional Heat Treatment | Nitriding (Tenifer) |
| Mechanical Strength (Optional) | R = 95 ÷ 105 kg/mm² |
| 35000 Series Standard | DIN 5482 |
| 35500 Series Standard | SAE (16/32″ DP, 12/24″ DP) |
| Application | Hydraulic pumps / Hydraulic power transmission |
| Product Code | Group and Series | Standard A (DIN 5482) – Teeth | Standard B – Teeth |
|---|---|---|---|
| 35001 | 3 C (35000 Series) | 35×31 – 18 teeth | DIN 5482 25×22 – 14 teeth |
| 35002 | 3.5 C (35000 Series) | 40×36 – 20 teeth | DIN 5482 30×27 – 16 teeth |
| 35003 | 4 C (35000 Series) | 48×44 – 23 teeth | DIN 5482 25×22 – 14 teeth |
| 35004 | 4 C (35000 Series) | 48×44 – 23 teeth | DIN 5482 30×27 – 16 teeth |
| 35005 | 4 C (35000 Series) | 48×44 – 23 teeth | DIN 5482 35×31 – 18 teeth |
| 35006 | 5 C (35000 Series) | 58×53 – 27 teeth | DIN 5482 30×27 – 16 teeth |
| 35007 | 5 C (35000 Series) | 58×53 – 27 teeth | DIN 5482 35×31 – 18 teeth |
| 35008 | 5 C (35000 Series) | 58×53 – 27 teeth | DIN 5482 40×36 – 20 teeth |
| 35009 | 5 C (35000 Series) | 58×53 – 27 teeth | DIN 5482 45×41 – 22 teeth |
| 35010 | 6 C (35000 Series) | 72×66 – 33 teeth | DIN 5482 40×36 – 20 teeth |
| 35011 | 6 C (35000 Series) | 72×66 – 33 teeth | DIN 5482 45×41 – 22 teeth |
| 35012 | 6 C (35000 Series) | 72×66 – 33 teeth | DIN 5482 50×45 – 24 teeth |
| 35501 | 3 A (35500 Series) | 35×31 – 18 teeth | SAE 16/32″ DP – 13 teeth |
| 35502 | 3 B (35500 Series) | 35×31 – 18 teeth | SAE 16/32″ DP – 15 teeth |
| 35503 | 3.5 A (35500 Series) | 40×36 – 20 teeth | SAE 16/32″ DP – 13 teeth |
| 35504 | 3.5 B (35500 Series) | 40×36 – 20 teeth | SAE 16/32″ DP – 15 teeth |
| 35505 | 4 D (35500 Series) | 48×44 – 23 teeth | SAE 16/32″ DP – 13 teeth |
| 35506 | 4 B (35500 Series) | 48×44 – 23 teeth | SAE 16/32″ DP – 15 teeth |
| 35507 | 4 A (35500 Series) | 48×44 – 23 teeth | SAE 16/32″ DP – 21 teeth |
| 35508 | 5 B (35500 Series) | 48×44 – 23 teeth | SAE 12/24″ DP – 14 teeth |
| 35509 | 5 B (35500 Series) | 58×53 – 27 teeth | SAE 16/32″ DP – 21 teeth |
| 35510 | 5 B (35500 Series) | 58×53 – 27 teeth | SAE 16/32″ DP – 23 teeth |
| 35511 | 5 D (35500 Series) | 58×53 – 27 teeth | SAE 12/24″ DP – 14 teeth |