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Borelli 21 daNm Electromagnetic Clutch – 30990 / 30991 Series
The Borelli 21 daNm Electromagnetic Clutch – 30990 / 30991 Series is a reversible hydraulic component designed for high-performance applications. It delivers a static torque of 21.0 daNm and supports speeds of up to 5000 rpm. Available in 12 V DC and 24 V DC versions, it offers fast engagement times of 25 ms. It integrates seamlessly with Bosch Group 2, Group 3 and SAE A/B flanges, ensuring versatility in industrial applications.
The available product codes are: 30990/2B, 30992, 30992/3B, 30990/SA, 30990/SB, 30991/2B, 30993, 30993/3B, 30991/SA, 30991/SB.
Borelli 21 daNm Electromagnetic Clutch – 30990 / 30991 Series
The Borelli 21 daNm Electromagnetic Clutch – 30990 / 30991 Series is designed to ensure precise control of mechanical power transmission in high-efficiency hydraulic systems. This fully reversible device delivers a nominal torque of 16.0 daNm and a maximum static torque of 21.0 daNm. Its dynamic performance profile demonstrates a wide operating range: torque reaches 14.5 daNm at 500 rpm, progressively decreasing to 8.8 daNm at 2000 rpm and 7.8 daNm at 3000 rpm. The maximum permissible rotational speed is 5000 rpm. Mechanical response times ensure engagement in 25 ms and disengagement in 40 ms. The minimum required interval between consecutive engagements is 20 seconds.
From a mechanical perspective, the unit has a total weight of 8 kg. The transmission shaft (code A30901) features a spline profile compliant with the DIN 5482 35×31 standard. Rotational stability is ensured by high-performance SKF 6009 2RS bearings. The main body, or housing (code 30009.1), is combined with a pulley featuring integrated grooves. The assembly also includes a dedicated 2×2.5 electrical cable for powering the electromagnetic coil. Gaskets, oil seals (35x50x7 and 45x60x7), and the PLV electromagnetic clutch contribute to optimal durability under demanding operating conditions.
The power supply specifications distinguish two main product variants: the 30990 Series operating at 12 V DC and the 30991 Series operating at 24 V DC. At a standard operating temperature of 20°C, the 12 V version draws 4.05 A, with a power consumption of 48.70 W and a resistance of 2.96 Ω. Similarly, the 24 V version draws 1.95 A, with a power consumption of 47.00 W and a resistance of 12.30 Ω. As the operating temperature increases to 120°C, these parameters change due to increased electrical resistance, resulting in a 20% reduction in overall performance.
The versatility of the Borelli 21 daNm Electromagnetic Clutch – 30990 / 30991 Series is ensured by the wide range of coupling flanges available for hydraulic pumps. Mounting configurations support major industrial standards, including specific adapters for Bosch Group 2 and Group 3 pumps, standard Group 3 flanges, and interfaces compliant with SAE A and SAE B specifications.
| Specification | Value |
|---|---|
| Nominal Torque | 16.0 daNm |
| Static Torque | 21.0 daNm |
| Dynamic Torque (at 500 / 3000 rpm) | 14.5 daNm / 7.8 daNm |
| Engagement Time | 25 m/sec |
| Disengagement Time | 40 m/sec |
| Maximum Speed | 5000 rpm |
| Shaft Spline Profile | DIN 5482 35×31 |
| Weight | 8 Kg |
| Voltage (Model) | Product Code | Compatible Flange Type |
|---|---|---|
| 12 V DC (30990 Series) | 30990/2B | Gr. 2 BOSCH |
| 12 V DC (30990 Series) | 30992 | Gr. 3 |
| 12 V DC (30990 Series) | 30992/3B | Gr. 3 BOSCH |
| 12 V DC (30990 Series) | 30990/SA | SAE A |
| 12 V DC (30990 Series) | 30990/SB | SAE B |
| 24 V DC (30991 Series) | 30991/2B | Gr. 2 BOSCH |
| 24 V DC (30991 Series) | 30993 | Gr. 3 |
| 24 V DC (30991 Series) | 30993/3B | Gr. 3 BOSCH |
| 24 V DC (30991 Series) | 30991/SA | SAE A |
| 24 V DC (30991 Series) | 30991/SB | SAE B |