Let’s learn about Rathi-Ringfeder Servo Couplings RJB with Dai Hong Phat, through the following article!
1. About Dai Hong Phat Corp – Rathi India
– Dai Hong Phat Corp is the official authorized representative of Rathi India in Vietnam (Rathi Vietnam), Laos, Cambodia, Philippines and Bangladesh. We provide genuine transmission shaft coupling solutions that meet international standards, helping to optimize the performance and durability of machinery systems.
– Established in 1993 in Pune, India, under Rathi Group. The company has achieved ISO 9001 certification and specializes in manufacturing transmission couplings. With a global distribution system and strict quality control processes, Rathi quickly became an internationally prestigious brand.
– In 2024, Rathi officially merged into Ringfeder.
– The Rathi-Lovejoy Servo Couplings RJB supplied by Dai Hong Phat are 100% genuine imports, with full CO/CQ, meeting international quality standards.
View more: Ringfeder Servo Couplings lines
2. Characteristics of Rathi-Ringfeder Servo Couplings RJB
– Manufacturer brand: Rathi-Ringfeder/India.
– Rathi-Lovejoy RJB servo couplings are designed to resist backlash during operation. The design includes 2 steel hubs and a damping ring to create a rigid block that protects the transmission.
– Easy assembly and disassembly: Rathi-Lovejoy RJB servo couplings allow for easy removal and replacement of rubber parts, minimizing costs and saving warranty/maintenance time.
– Operating environment: Can operate in temperatures ranging from -40°C to 120°C.
View more product: Jaw Flex Couplings Type L
| FOR ANY INQUIRIES OR QUOTATION REQUESTS, PLEASE CONTACT: SALES DEPARTMENT HOTLINE: +84 906 955 057 – EMAIL: INFO@DHP-CORP.COM.VN |
3. Applications of Rathi-Ringfeder Servo Couplings RJB
Servo Shaft Couplings Type RJB are widely utilized across industries such as machine tools, automation, power transmission, medical technology, packaging, and servo motor applications. They provide precise torque transmission, accommodate misalignment, and dampen vibration, ensuring reliable performance and smooth operation in various machinery and equipment.

4. Technical specifications of the Curve-Flex Couplings Type RJB

| Coupling Size | Hub TYPE | kW at 100 rpm | Torque Nm | Max. Speed RPM | Min. Bore | Max. Bore | Dimensions [mm] | WEIGHT (kg.) | |||||
| Gray | Blue | Light Ivory | Gray | Blue | Light Ivory | L1 | L2 | ||||||
| RJB-24 | I | 0.35 | 0.65 | 0.8 | 33 | 62 | 76 | 10600 | 9 | 24 | 30 | – | 0.24 |
| II | 22 | 28 | 30 | – | 0.34 | ||||||||
| RJB-28 | I | 0.95 | 1.75 | 2.07 | 91 | 167 | 198 | 8500 | 10 | 28 | 35 | – | 0.39 |
| II | 28 | 38 | 35 | – | 0.54 | ||||||||
| RJB-38 | I | 1.9 | 3.47 | 4.21 | 182 | 332 | 402 | 7100 | 12 | 40 | 45 | – | 2 |
| II | 12 | 48 | 45 | – | 2.4 | ||||||||
| III | 12 | 48 | – | 70 | 3.6 | ||||||||
| RJB-42 | I | 2.65 | 4.99 | 5.86 | 253 | 477 | 560 | 6000 | 14 | 45 | 50 | – | 3.5 |
| * II | 14 | 50 | 50 | – | 3.54 | ||||||||
| II | 14 | 55 | 50 | – | 3.8 | ||||||||
| III | 14 | 55 | – | 75 | 5.5 | ||||||||
| RJB-48 | I | 3.1 | 5.49 | 6.98 | 296 | 524 | 667 | 5600 | 15 | 52 | 56 | – | 4.4 |
| * II | 15 | 55 | 56 | – | 4.76 | ||||||||
| II | 15 | 62 | 56 | – | 5.2 | ||||||||
| III | 15 | 62 | – | 80 | 4.2 | ||||||||
5. Why choose Dai Hong Phat Corp?
– 100% genuine products imported directly from Rathi-Ringfeder India.
– Protect customers from counterfeit goods and always provide full CO/CQ documents.
– Goods in stock, fast delivery nationwide 24/7.
– Free technical consultation and support for drawings, catalogs.
– Refined processing workshop to meet individual requirements.
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With more than 15 years of experience, Dai Hong Phat Transmissions Shaft Couplings is proud to be a trusted partner of hundreds of domestic and foreign enterprises.
Let us accompany your sustainable development!
DAI HONG PHAT ENGINEERING SERVICE TRADING MANUFACTURE COMPANY LIMITED
– Ho Chi Minh City Office: 22 Street 11, Khang Dien Residential Area, Duong Dinh Hoi Street, Phuoc Long Ward, Ho Chi Minh City.
– Hanoi Office: No. 14-15A, 7th Floor, Charmvit Building, No. 117 Tran Duy Hung, Thanh Xuan Ward, Hanoi City.
– Tel HCM: +84.28.22536631 – 22536632 – 66818587 | | Fax: 028.22536632
– Hotline: +84906.955.057 | – Email: info@dhp-corp.com.vn
– Website: https://en.daihongphat.asia/ – https://khopnoitruc.com/ – https://ringfeder.com.vn/









