Jiteng is a professional manufacturer and supplier of TL Type Elastic Sleeve Pin Couplings in China. Currently, this flexible coupling component enjoys widespread popularity in the field of small-to-medium-scale power transmission, relying on a combined structure of pins and elastic rubber sleeves to facilitate power transmission. Unlike rigid couplings—which lack cushioning capabilities and risk damaging main shafts or gears under overload conditions—this product leverages the flexible properties of its elastic rubber sleeves to absorb the shock and vibration generated during equipment startup and shutdown, while simultaneously providing a dedicated overload protection mechanism.
1. Because of elastic sleeve distortion and the teeth clearance between ring holes of half-coupling, the coupling has some compensatory of relativity shift and isolation properties.
2. Working temperature is from -20℃ to +70℃
3. Keyway forms and size shaft holes and mark method must accord with the prescnpt of GB/T3852-1977 and 《connecting form sizes and shaft holes of coupling》
For Z and J type with counterbore, it is length of fit not include counterbore, L value as the drawing below.
The standard code of old type is GB4323-84
TL Type Elastic Sleeve Pin Coupling is suitable for general working scenarios with medium and small power, medium and low speed, frequent start-ups and frequent forward-reverse rotation.
It has moderate buffering and vibration damping capacity and can absorb conventional impact, but it is not applicable to working conditions with strong impact and severe vibration.
It is most suitable for equipment with rigid mounting base and high alignment accuracy.
The TL Type Elastic Sleeve Pin Coupling features a built-in passive overload protection mechanism with simple, intuitive logic. It is specifically designed to address critical industry pain points—such as equipment jamming, stalling, or host machine damage caused by instantaneous overload shocks in small-to-medium-sized machinery—thereby enabling a tiered protection strategy.
- Dedicated Overload Pressure Relief Design: Within the entire transmission assembly, the elastic rubber sleeve serves as the core consumable component. Under normal operating loads, the sleeve provides stable cushioning and torque transmission; however, in the event of abnormal conditions—such as material jamming, motor stalling, or instantaneous overload—the elastic sleeve is designed to be the first component to undergo compression, wear, and subsequent failure.
- Isolation of Overload Shock Forces: Once the elastic sleeve fails, the torque transmission path is automatically interrupted. This effectively isolates the overload shock forces, preventing them from propagating further down the transmission chain and thereby fundamentally protecting critical, high-value components such as motors, main shafts, bearings, and gear reducers.
- Cost-Effective Protection Solution: In contrast to the costly damage that can be inflicted upon an entire machine assembly, fault recovery requires only the replacement of the low-cost elastic sleeve. This allows for the resolution of overload-related failures at minimal expense, avoiding both exorbitant repair costs and complex maintenance procedures.
When benchmarked against comparable rigid couplings and high-end elastic couplings, the TL Type Elastic Sleeve Pin Coupling demonstrates significant advantages across three key dimensions: initial procurement cost, failure rate, and spare parts cost. This makes it an ideal choice for large-scale equipment integration and procurement.
- Controllable Costs through Mass Production: Leveraging mature, standardized manufacturing processes and mass-produced components, the production workflow is streamlined and efficient. Consequently, the ex-factory pricing remains highly affordable, making it well-suited for bulk integration by equipment manufacturers and for maintaining ready stock by distributors.
- Stable Structure and Low Failure Rate: Featuring a minimal number of internal components and devoid of complex, precision-dependent structures, the coupling contains no fragile precision parts prone to damage. It is capable of withstanding prolonged periods of continuous operation involving frequent starts and stops, resulting in an extremely low probability of operational failure during daily use.
- Universal and Affordable Spare Parts: Wear-prone components—such as the elastic sleeves—are standard industry parts. They are widely available in the market through numerous procurement channels, resulting in extremely low costs for individual component replacement. Compared to traditional rigid couplings, the overall cost-effectiveness and value proposition are significantly superior.
Note: ① Coupling weights in the sheet calcutated as minimum diameter and max length.
② Short overloading can not exceed 2 times rated normal torque.
③ Forms of shaft holes the lengths of L and L1 can be selected as requirements of clients.
④ Running inertias are similar value.
From a long-term operational perspective, the TL Type Elastic Sleeve Pin Coupling significantly streamlines maintenance and operational processes. It effectively reduces costs associated with manual repairs, spare part replacements, and production downtime, making it ideally suited for general-purpose machinery requiring continuous 24-hour operation.
- Lifetime Lubrication-Free Operation: The product relies on rubber elastomers to cushion power transmission; as it features no internal friction-generating components, it requires no lubrication oil or grease after installation. This eliminates the need for periodic maintenance procedures and reduces labor costs associated with upkeep.
- Simple Replacement of Wear Parts: Should the elastic sleeves eventually age or become damaged, maintenance personnel need only remove the end covers to complete the replacement. The entire process can be performed without having to move the connected host machines on either side, ensuring a simple and highly efficient disassembly and reassembly workflow.
- Reduced Downtime Losses: Repair and replacement tasks are quick to complete—often requiring just a single technician—thereby minimizing equipment downtime. This prevents production capacity losses typically caused by component repairs, making the coupling suitable for various types of continuous-production machinery.
- Pumping Equipment: Widely compatible with fluid-handling equipment such as centrifugal pumps, vacuum pumps, and chemical transfer pumps. It dampens operational vibrations within the pump body, thereby protecting both the pump shaft and the connected motor.
- Fan and Blower Equipment: Suitable for various ventilation systems, including general-purpose fans, HVAC blowers, and induced draft fans. It attenuates vibrations generated during high-speed fan operation, optimizing the overall operational stability of the equipment.
- General Industrial Machinery: Can be integrated with a wide range of equipment—including conveyor systems, light-duty compressors, machine tools, agricultural machinery, and small-to-medium-sized gear reducers—to fulfill the dual requirements of basic power transmission and overload protection.
- Q1: What is the protective mechanism of the TL Type Elastic Sleeve Pin Coupling? How does it differ from a torque limiter?
- A1: The TL Type Elastic Sleeve Pin Coupling employs a passive overload protection mechanism; in the event of an overload, the rubber elastic sleeves are designed to compress, wear down, and eventually shear—thereby disengaging the torque transmission. In contrast, a torque limiter utilizes an active tripping mechanism to disengage the drive. This product specializes in cost-effective, basic protection and shock absorption, making it suitable for standard equipment with low to medium power outputs; conversely, our torque limiters are designed for heavy-duty, high-risk, and high-precision industrial machinery.
- Q2: Does replacing a worn elastic sleeve require disassembling the entire coupling assembly?
A2: No, it is not necessary to dismantle the entire machine, nor do you need to move the connected prime movers—such as motors or pumps—located at either end. You simply need to remove the outer end cover to directly replace the internal elastic sleeve if it has aged or become damaged. The procedure is straightforward, allowing even novice technicians to complete the maintenance task quickly.
- Q3: Does this coupling require periodic lubrication or maintenance during routine operation?
A3: The product is entirely maintenance-free and requires no lubrication; there is no need to apply any grease or lubricants. The replacement interval for the elastic sleeve depends on the specific operating conditions. Under standard conditions—at ambient temperatures and in dust-free environments—the sleeve typically lasts for 1 to 3 years. For applications involving frequent start-stops or high vibration levels, we recommend inspecting the sleeve every six months; simply replace it promptly if you observe any signs of cracking, hardening, or aging.
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