Follow us
Search keyword

Web Menu

Product Search

Language

Share

Products · Products · Products · Products · Products · Products · Products · Products · Products · Products · Products · Products · Products · Products · Products · Products ·

PXQ Series Parallel Tangent Elastic Coupling

Home · Products · Coupling / Nut Housing · PXQ Series Parallel Tangent Elastic Coupling
  • PXQ Series Parallel Tangent Elastic Coupling
PXQ Series Parallel Tangent Elastic Coupling

PXQ Series Parallel Tangent Elastic Coupling

The PXQ series is a non-metallic elastic coupling with a parallel tangent design. Its main body consists of two metal half-couplings and a set of parallel, embedded rectangular polyurethane (PU) elastic rods. These elastic rods primarily bear shear force during torque transmission, unlike the compressive force in traditional jaw couplings. This mechanical advantage allows it to transmit greater torque at the same size, and provides higher fatigue life and better misalignment compensation capabilities.

Inquiry
PREV: SZHK Series Oldham Type Cross-shaped Coupling Next: DMP Series Double Diaphragm Coupling

Technology

The core value of the PXQ Series Parallel Tangent Elastic Coupling lies in its triple advantages of "high elasticity, high load capacity, and long lifespan." It differs significantly from common jaw couplings (MH series) in principle and performance.

Performance Dimensions PXQ Series Parallel Tangential Couplings MH Series Star Couplings Application Selection Guide
Core Positioning Suitable for medium-to-low-speed power transmission applications involving heavy loads, impact and significant misalignment. Precision transmission for general-purpose, light to medium-duty, high-speed applications. Choose PXQ for heavy-duty applications; choose MH for general-purpose precision applications.
Force Transmission Principles Shear forces act in the tangential direction. High utilisation of the elastomer ensures uniform stress distribution. Subject to radial compression forces. Subject to axial forces, which may lead to stress concentration. The PXQ offers higher torque density and greater fatigue resistance.
Torque Capacity Very high. For the same dimensions and outer diameter, the rated torque is typically significantly higher than that of a star coupling. Moderate. The PXQ offers clear advantages where space is limited but high torque transmission is required.
Elasticity and Compensation Excellent. The elastomer has ample space for deformation, enabling it to absorb greater impact and compensate for larger radial and angular misalignments. Good. The PXQ is better suited for equipment subject to high levels of vibration and shock, or where alignment is poor.
Shock Absorption and Vibration Damping Excellent. The large number of elastic elements and highly elastic design make it an excellent ‘vibration isolator’. Good. PXQ is the preferred choice for equipment such as crushers, compressors and mixers.
Rotational Speed and Balance Suitable for medium to low speeds. Due to the high proportion of non-metallic components and limitations on mass distribution uniformity, the maximum permissible speed is typically lower than that of all-metal or compact couplings. Suitable for medium to high speeds. In high-speed servo applications (e.g. >4000 rpm), MH or diaphragm couplings should be given priority.

Main Technical Parameters and Design
Structural Analysis:
Elastomer: Uses wear-resistant polyurethane rods, with different hardness options available depending on load requirements. The elastic rods can be replaced individually, resulting in low maintenance costs.
Metal Parts: Typically made of ductile iron or steel, with a robust structure suitable for harsh environments.
Key Performance:
High Elastic Constant: Its torsional stiffness can be adjusted according to the hardness and number of elastic rods, providing different options from soft start to high rigidity.
Lubrication-free and maintenance-free: No lubrication is required, making it environmentally friendly.
Electrical Insulation: The polyurethane elastomer provides good insulation performance.

Selection Considerations:
Focus on peak torque (not just rated torque) to ensure it can withstand impact loads during equipment startup or jamming.
Clearly define the operating speed range to avoid failure due to centrifugal deformation of the elastomer at excessively high speeds.

Applications
The PXQ series is an ideal power transmission link for the following heavy industry and high-impact applications:
Heavy machinery: Transmission connections for mining crushers, ball mills, and rolling mills.
Power equipment: Motor and load connections for diesel generators, water pumps, and large fans.
Construction machinery: Drive parts for mixing plants, conveyors, and hoists.
Any industrial transmission system with severe misalignment, heavy load impact, and relatively low speed.

The PXQ Series Parallel Tangent Elastic Coupling is an outstanding representative of the "using flexibility to overcome rigidity" transmission philosophy. Through its unique parallel tangent force design, it elevates the buffering, compensation, and load-bearing capabilities of elastic couplings to a new level. Choosing the PXQ series means you are selecting a "tough yet flexible partner" for heavy-duty equipment facing demanding working conditions.  It effectively protects expensive drive motors and load equipment from damage caused by shocks and deviations, significantly reducing downtime risks and maintenance costs, and serving as a reliable foundation for ensuring continuous and stable production in heavy industry.

Parameters

Model No. d1/d2 pore size D
(mm)		       L
(mm)		 L1
(mm)		 L2
(mm)		 F
(mm)		 H
(mm)		 Screw size
M		 Tightening torque
(N.m)		 Rated torque
(N.m)		 Maximum torque
(N.m)		 Maximum speed
(RPM)		 Moment of inertia
(kg·m²)		 Static torsional stiffness
(N.m/
rad)		 Permissible eccentricity
(mm)		 Permissible deviation
(° )		 Axial runout
(mm)
Min
(mm)		 Max
(mm)
PXQ-D12L18.5 3  5  12  18.5  6  6.5  2.75  3.25  M2 1.5  0.5  1  10000  8.8*10-6 110  0.1  1.5  ±0.2
PXQ-D16L23 3  6  16  23  8  7  3.75  4.25  M3 1.5  0.5  1  9500  9.1*10-6 110  0.1  1.5  ±0.2
PXQ-D20L20 4  10  20  20  7.5  5  3.75  6.25  M3 1.5  1  2  7600  8.8*10-6 110  0.1  1.5  ±0.2
PXQ-D20L26 4  10  20  26  7.5  11  3.75  6.25  M3 1.5  1  2  7600  9.1*10-6 100  0.1  1.5  ±0.2
PXQ-D25L25 5  12  25  25  10  5  5  7.5  M3 1.5  2  4  6100  2.3*10-6 165  0.15  1.5  ±0.2
PXQ-D25L31 5  12  25  31  10  11  5  7.5  M3 1.5  2  4  6100  2.6*10-6 165  0.15  1.5  ±0.2
PXQ-D28L38 6  14  28  38  13  12  6.5  7.5  M4 3.5  3  6  5600  1.5*10-4 190  0.15  1.5  ±0.2
PXQ-D32L32 6  15  32  32  13  6  6.5  9.5  M4 3.5  4  8  5000  1.8*10-4 228  0.15  1.5  ±0.2
PXQ-D32L41 6  15  32  41  13  15  6.5  9.5  M4 3.5  4  8  5000  7.2*10-6 228  0.15  1.5  ±0.2
PXQ-D38L41 8  16  38  41  13  15  6.5  12.5  M5 3.5  7  14  4200  2.7*10-6 280  0.2  1.5  ±0.2
PXQ-D40L50 8  20  40  50  19.5  11  9.75  10.25  M5 3.5  8  16  3800  2.7*10-5 340  0.2  1.5  ±0.2
PXQ-D40L56 8  20  40  56  19.5  17  9.75  10.25  M5 3.5  8  16  3800  9.0*10-5 340  0.2  1.5  ±0.2
PXQ-D50L50 10  28  50  50  19.5  11  9.75  15.25  M6 6  20  40  3100  2.8*10-4 700  0.2  1.5  ±0.2
PXQ-D50L71 10  28  50  71  19.5  32  9.75  15.25  M6 6  20  40  3100  2.8*10-4 700  0.2  1.5  ±0.2
PXQ-D63L71 12  35  63  71  27  17  9.75  21.75  M8 8  35  70  3000  2.8*10-4 850  0.2  1.5  ±0.2
PXQ-D63L90 12  35  63  90  27  36  9.75  21.75  M8 8  35  70  3000  2.8*10-4 850  0.2  1.5  ±0.2

Drawings

Related Products