China factory Stainless Steel Curved Jaw Coupling with PU Elastomer

Product Description

CHINAMFG Jaw couplings are designed as 3 piece comination,  including 2 hubs and 1 elastomer made of polyurethane.  The cuved jaw fits CHINAMFG the spider, which minimizes shock to the motor and other sensitive equipment.  
Widely used in various mechanical and hydraulic fields 
High precision in transmission and high rotating speed.
Suitable for wide range of environment, with the higest temperature 280 degree
Good elasticity, hight strength, corrosion resistant, wearable
No need to lubricate,quiet operation 
Quick and easy mounting and disassembly

Item No. Max. Rotation Speed r/min 92 SH A 98 SH A 95 SH A for Φ65 and above 64 SH D
Torque N.m +30° CP Damping Power Tkmax Torsion Angle Torque N.m +30° CP Damping Power Tkmax Torsion Angle Torque N.m +30° CP Damping Power Tkmax Torsion Angle
Max.T kmax Tkw Alternation Max.T kmax Tkw Alternation Max.T kmax Tkw Alternation
UTJC-14 19000 15 2.0 10° 25 3.3 10° 32 4.2 9.0
UTJC-19 19000 20 2.6 4.8 34 4.4 4.8 42 5.5 7.2 3.6°
UTJC-24 14000 70 9.1 6.6 120 16 6.6 150 19.2 9.9 3.6°
UTJC-28 11800 190 25 8.4 320 42 8.4 400 52 12.6 3.6°
UTJC-38 9500 380 49 10.2 650 85 10.2 810 105 15.3 3.6°
UTJC-42 8000 530 69 12 900 117 12 1120 146 18.0 3.6°
UTJC-48 7100 620 81 13.8 1050 137 13.8 1310 170 20.7 3.6°
UTJC-55 6300 820 107 15.6 1370 178 15.6 1650 215 23.4 3.6°
UTJC-65 5600 1250 163 18 1880 244 18 2350 306 27 3.6°
UTJC-75 4750 2560 333 21.6 3840 499 21.6 4800 624 32.4 3.6°
UTJC-90 3750 4800 624 30 7200 936 30 9000 1170 45 3.6°
UTJC-100 3350 6600 858 36 9900 1287 36 12370 1608 54 3.6°
UTJC-110 3000 9600 1248 42 14400 1872 42 18000 2340 63 3.6°
UTJC-125 2650 13300 1729 48 20000 2600 48 25000 3250 72 3.6°
UTJC-140 2360 17100 2223 54.6 25600 3328 54.6 32000 4160 81.9 3.6°

Ubet Jaw coupling grooving type is backlash free, using screws after slotting to eliminate the clearance. This grooving type coupling is suitable for power transmission on main shaft, elevating platform and machine tool.
Material: Alluminum for size below 42
               Steel for size over 42
Finish: Natural or Anodizing
Size Range: 19 to 75
Finished bore: according to ISO fit H7
Keyway width: according to DIN 6885/1
The Tolerance of keyway is Js9

jaw coupling

Installing and Aligning a Jaw Coupling for Optimal Performance

Proper installation and alignment of a jaw coupling are critical to ensure optimal performance, minimize wear, and prevent premature failure. Here are the steps to install and align a jaw coupling correctly:

  1. Inspect the Coupling: Before installation, inspect the coupling components for any damage or defects. Ensure that the elastomeric spider (flexible element) is in good condition and free from any debris.
  2. Prepare the Shaft Ends: Clean the shaft ends and remove any dirt, rust, or burrs. Make sure the shafts are smooth and free from contaminants that could affect the coupling’s grip.
  3. Insert the Spider: Place the elastomeric spider into the jaws of one coupling half. It’s crucial to ensure the spider is seated correctly and evenly distributed within the jaws.
  4. Align the Coupling Halves: Carefully align the two coupling halves, ensuring that the shaft ends are concentric and coaxial. Misalignment can lead to additional stresses and premature wear on the coupling.
  5. Tighten Fasteners: Insert the fasteners (usually set screws or clamping bolts) and tighten them evenly and sequentially. It’s essential to follow the manufacturer’s recommended torque values to avoid overtightening, which could damage the spider or cause stress on the shafts.
  6. Check Alignment: After tightening the fasteners, recheck the alignment of the coupling to ensure the shafts remain properly aligned. If necessary, make any adjustments to achieve accurate alignment.
  7. Lubrication: Some jaw couplings may require lubrication for smooth operation. Check the manufacturer’s guidelines for lubrication requirements and use the recommended lubricant.
  8. Run-In Period: After installation, it’s advisable to run the coupling at low speed and gradually increase the load to allow the spider to settle into its operating position. This run-in period helps ensure proper seating and further verifies alignment.

It’s essential to follow the manufacturer’s installation instructions and guidelines specific to the jaw coupling model being used. Proper installation and alignment will result in reliable and efficient power transmission, reduced maintenance costs, and extended coupling life.

jaw coupling

How does a jaw coupling help in torque and rotational speed control?

A jaw coupling plays a vital role in torque and rotational speed control by facilitating efficient power transmission while compensating for misalignments and dampening vibrations. Here’s how a jaw coupling helps in achieving torque and rotational speed control:

  • Torque Transmission: Jaw couplings are designed to transmit torque between two shafts with minimal power loss. The elastomer spider, which acts as the flexible element between the two coupling hubs, efficiently transfers torque from one shaft to the other. This precise torque transmission is essential in maintaining consistent rotational motion and controlling the speed of the driven equipment.
  • Misalignment Compensation: In rotating machinery, misalignments between the motor and driven equipment are common due to factors like installation errors, thermal expansion, or shaft deflection. Jaw couplings can handle both angular and parallel misalignments. By accommodating these misalignments, jaw couplings ensure smooth operation and prevent unnecessary stress on the equipment, thus contributing to torque and rotational speed control.
  • Vibration Damping: Vibrations are an inherent characteristic of rotating machinery and can affect torque and rotational speed stability. The elastomer spider in the jaw coupling acts as a damping element, absorbing and dissipating vibrations. This vibration damping capability reduces the risk of speed fluctuations and enhances overall system stability during operation.
  • Start-Up and Overload Protection: During start-up or when the driven equipment experiences sudden overload conditions, there may be spikes in torque and rotational speed. Jaw couplings, with their torsional flexibility, can absorb these sudden torque variations, protecting the equipment from damage and providing smoother start-up and operation.

The combination of precise torque transmission, misalignment compensation, vibration damping, and overload protection makes jaw couplings effective in achieving torque and rotational speed control. However, it is essential to choose the appropriate jaw coupling size and material for the specific application to ensure optimal performance and reliability.

For applications that require even higher torque capacity or stricter speed control, specialized coupling types like gear couplings or servo couplings may be more suitable. These couplings offer advanced features for precision motion control and torque transmission in more demanding applications.

jaw coupling

Limitations and Disadvantages of Using Jaw Couplings

While jaw couplings offer several advantages, they also have some limitations and disadvantages that should be considered when selecting them for specific applications:

  • Angular Misalignment: Jaw couplings are sensitive to angular misalignment, and excessive misalignment can lead to increased wear and reduced service life.
  • Radial Misalignment: Similar to angular misalignment, radial misalignment should be kept within acceptable limits to prevent premature wear.
  • Temperature Limitations: The operating temperature range of jaw couplings may be limited by the material used. For high-temperature applications, other coupling types may be more suitable.
  • Shock Load Absorption: While jaw couplings can handle moderate shock loads, they may not be ideal for applications with severe shock loads, which can lead to increased stress and failure.
  • Torsional Stiffness: Jaw couplings have a certain level of torsional stiffness, which means they may not provide the same level of vibration isolation as other coupling types.
  • Backlash: Jaw couplings can have some degree of backlash due to their elastomeric element, which may not be desirable in precision positioning applications.
  • Speed Limitations: High-speed applications may require careful consideration of the jaw coupling’s design and material selection to avoid issues related to centrifugal forces.

Despite these limitations, jaw couplings remain a popular choice in many applications due to their ease of installation, simple design, and cost-effectiveness. Proper selection, installation, and maintenance can help mitigate some of these limitations and ensure optimal performance and reliability of the jaw coupling.

China factory Stainless Steel Curved Jaw Coupling with PU Elastomer  China factory Stainless Steel Curved Jaw Coupling with PU Elastomer
editor by CX 2023-12-13

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