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China Suppliers Factory Universal Coupling for Heavy-Duty Petroleum Applications - MTPM Spherical Ball-Cage Design
Product Specifications
| Product name | Ball cage coupling, spherical roller gear coupling, ball cage gear coupling |
| Chinese Model | MTBCC series |
| Temperature rating | -40°C to 120°C |
| Material | Mostly made of high-strength alloy steel 42CrMo (AISI 4140/4340) |
| Service life | When properly aligned and lubricated, the coupling is expected to operate for over 20,000 hours, which generally corresponds to 3 ~ 5 years of service in standard drilling applications. |
| Application | As a key component in heavy-duty drive systems such as drilling rigs, mud pumps, and rotary table and other transmission machinery. |
| Third party witness and inspection report available | Bureau Veritas (BV), CCS, ABS, SJS etc. |
Product Features
The ball-cage universal coupling combines advanced design with reliable performance:
- Provides damping and vibration reduction, effectively lowering noise, with an automatic recirculating lubrication system.
- Offers 0.5 to 1 times higher load capacity compared to conventional universal couplings with the same rotation diameter and inclination angle.
- Ensures excellent synchronization between driving and driven shafts, even when using a single ball plunger type structure.
- Allows large axial and radial displacement compensation; axial displacement can be achieved without external spline connections.
- Compact and lightweight structure with high manufacturability, supporting efficient mass production and reduced costs.
- Reliable in operation, easy to assemble and disassemble, convenient to maintain, and delivers long service life.
- Applicable to a wide range of working conditions, from low speed heavy loads to high speed drives, particularly effective for shafts with large inclination angles or restricted radial dimensions.
- Allows significant axial and radial displacement, with a large angular misalignment capacity, eliminating the need for external spline connections in axial movement.
Product Parameters
| Model | Nominal Torque Tn (N.m) |
Fatigue Torque Tf (N.m) |
Max. Angular Misalignment (A) | Allowable Axial Movement ∆ |
|---|---|---|---|---|
| MTBCC225F | 24,800 | 9,000 | 12° | ±25 |
| MTBCC250F | 37,500 | 13,700 | 10° | ±30 |
| MTBCC285F | 44,000 | 16,000 | 10° | ±30 |
| MTBCC300F | 58,000 | 21,000 | 10° | ±30 |
| MTBCC315F | 80,000 | 29,000 | 10° | ±35 |
| MTBCC350F | 109,000 | 40,000 | 10° | ±35 |
| MTBCC390F | 150,000 | 66,500 | 10° | ±38 |
| MTBCC440F | 210,000 | 84,000 | 8° | +30 / -50 |
| MTBCC490F | 320,000 | 160,000 | 8° | ±45 |
| MTBCC550F | 390,000 | 195,000 | 8° | +40 / -60 |
Frequently Asked Questions (FAQ)
Q
What is a ball cage coupling and how does it differ from a conventional universal coupling?
A ball cage coupling (also known as a spherical roller gear coupling or ball cage gear coupling) uses a ball-and-cage mechanism to transmit torque between shafts. Compared to conventional universal couplings of the same rotation diameter and inclination angle, it offers 0.5 to 1 times higher load capacity, better synchronization between driving and driven shafts, and allows larger axial and radial displacement compensation without external spline connections.
Q
What material is used in the MTBCC series ball cage couplings?
The MTBCC series couplings are mostly manufactured from high-strength alloy steel 42CrMo, which is equivalent to AISI 4140/4340. This material provides excellent toughness, fatigue resistance, and durability for heavy-duty industrial applications.
Q
What is the expected service life of the MTBCC ball cage coupling?
When properly aligned and lubricated, the MTBCC series coupling is expected to operate for over 20,000 hours, which generally corresponds to 3 to 5 years of service in standard drilling applications. Regular maintenance and correct installation are key factors in achieving maximum service life.
Q
What are the typical applications for the MTBCC series ball cage couplings?
The MTBCC series is designed as a key component in heavy-duty drive systems, including drilling rigs, mud pumps, rotary tables, and other transmission machinery. It is particularly effective for shafts with large inclination angles or restricted radial dimensions, and is suitable for both low-speed heavy-load and high-speed drive conditions.
Q
What third-party inspection and certification bodies are available for these couplings?
Third-party witness inspection and reports are available from recognized international certification bodies including Bureau Veritas (BV), CCS, ABS, SJS, and others. These certifications ensure the product meets international quality and safety standards for industrial and marine applications.
Q
What is the operating temperature range and maximum angular misalignment of the MTBCC couplings?
The MTBCC series ball cage couplings are rated for operating temperatures from -40°C to 120°C, making them suitable for a wide range of environmental conditions. Depending on the model, the maximum angular misalignment ranges from 8° to 12°, with the smaller models (e.g., MTBCC225F) supporting up to 12° and larger models (e.g., MTBCC440F and above) rated at 8°.