ML Plum Blossom Jaw Coupling | 16-5600 N·m, 45# Steel, GB/T5272-2002

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ML / XLD / XL Jaw Coupling – Plum Blossom Elastic Coupling, 16-5600 N·m

Model Number
Check below, custom

ML1
ML2
ML3
ML4
ML5
ML6
ML7
ML8
ML9
ML10
ML11
ML12

Product Description

ML / XLD / XL Jaw Coupling – Plum Blossom Elastic Coupling, 16-5600 N·m, GB/T5272-2002

The Apexcoupling ML Series (also known as Plum Blossom Coupling, Jaw Coupling, or LM Series under GB/T5272-2002) is a high-performance flexible shaft coupling designed for reliable power transmission in medium-speed, medium-torque applications. Featuring a three-piece construction – two metal hubs with protruding claws and a plum-shaped polyurethane spider – this coupling delivers excellent vibration damping, shock absorption, and misalignment compensation. With no lubrication required and a simple, compact design, the ML coupling is the ideal solution for mining, metallurgy, petroleum, chemical, hoisting, transportation, light industry, textile, pumps, fans, and general industrial machinery.

✅ Compact, lightweight design – low moment of inertia for medium to high-speed applications. Polyurethane spider – oil-resistant, wear-resistant, excellent vibration damping. Maintenance-free – no lubrication required. High load capacity – reliable and durable. Easy maintenance – spider replacement without disassembling hubs.

Key Technical Specifications

Parameter	Value
Brand	Apexcoupling
Model Series	ML (Plum Blossom / Jaw Coupling)
Also Known As	LM series (GB/T5272-2002), XLD, XL
Standard	GB/T5272-2002 (replaces GB5272-85)
Type	Flexible / Jaw / Spider / Plum blossom
Structure	Two hubs + plum-shaped polyurethane spider
Hub Material	45# carbon steel, cast iron, ductile iron, stainless steel (custom)
Spider Material	High-strength polyurethane (PU) – oil-resistant, wear-resistant
Spider Hardness	95-98 Shore A (standard)
Backlash	Zero (with preloaded spider)
Nominal Torque Range	16 – 5600 N·m
Maximum Speed	Up to 15300 RPM (varies by model)
Bore Diameter Range	6 – 160 mm (varies by model)
Operating Temperature	-35°C to +80°C
Misalignment Compensation	Angular, radial, and axial
Vibration Damping	Excellent – polyurethane spider absorbs shock
Lubrication	None required – maintenance-free
Customization	OEM – custom bores, keyways, and materials
Applicable Industries	Mining, metallurgy, petroleum, chemical, hoisting, transportation, light industry, textile, pumps, fans, printing, packaging, woodworking
Place of Origin	Guangdong, China

🔧 Custom bores, keyways, and materials available. Contact us with your specifications.

ML Series – Model Range & Specifications

Model	Nominal Torque (N·m)	Max Speed (RPM)	Bore Range (mm)	D (mm)	L0 (mm)	Weight (kg)
ML1	25	8000	6-20	–	–	–
ML2	50	7600	12-25	108	38	1.74
ML3	100	6900	20-32	117	40	2.33
ML4	140	6200	22-40	130	45	3.38
ML5	350	5000	25-50	–	–	–
ML6	400	4100	30-55	–	–	–
ML7	630	3700	35-65	–	–	–
ML8	1120	3100	45-75	–	–	–
ML9	1800	2800	50-90	–	–	–
ML10	2800	2500	60-110	–	–	–
ML11	5000	2280	60-125	–	–	–
ML12	5600	1980	70-140	–	–	–

📐 Additional sizes (ML13-ML16) and custom dimensions available upon request. Contact our engineering team for custom sizing.

Product Structure

Two Hubs – Precision-machined from 45# steel or cast iron with H7 bores and keyways.
Plum-Shaped Polyurethane Spider – The elastic element that transmits torque, absorbs shock, and compensates for misalignment.
Bore & Keyway – Standard H7 bore with keyway per GB/T3852-1997.

💡 How it works: The ML coupling consists of two half-couplings with identical protruding claws and a plum-shaped elastic element placed between them. The polyurethane spider engages with the claws, transmitting torque through radial compression while absorbing shock, dampening vibration, and compensating for angular, radial, and axial misalignment. The simple three-piece design allows for easy assembly and spider replacement without moving the hubs.

Product Features & Advantages

Advantage	Benefit
Compact & Lightweight	Small radial dimensions, low moment of inertia – ideal for medium to high-speed applications
Polyurethane Spider	Excellent wear resistance, oil resistance, vibration damping, and electrical insulation
Maintenance-Free	No lubrication required – reduces operating costs
Zero Backlash	No rotational clearance – precise torque transmission
High Load Capacity	Handles demanding applications – up to 5600 N·m
Misalignment Compensation	Accommodates angular, radial, and axial deviations – protects bearings and seals
Simple Structure	Easy installation and maintenance – spider replacement without hub movement
Wide Temperature Range	-35°C to +80°C – suitable for diverse environments
GB/T5272-2002 Standard	Manufactured to established Chinese national standard – quality assured
Frequent Start/Stop Capability	Suitable for positive and negative rotation, frequent starting applications
OEM Customization	Custom bores, keyways, and materials available

Applications

Metallurgical Equipment – Rolling mills, continuous casting lines
Mining Machinery – Crushers, feeders, conveyors
Petroleum Equipment – Oil and gas machinery
Chemical Industry – Agitators, pumps, compressors
Hoisting & Transportation – Cranes, elevators, conveyors
Light Industry & Textile – Spinning and weaving equipment
Pumps – Centrifugal, gear, and diaphragm pumps
Fans & Blowers – Industrial ventilation systems
Printing Machinery – Register control, high-speed operation
Packaging Machinery – Wrapping and sealing machines
Woodworking Machinery – Saws, routers, planers

Why Choose Apex Coupling for ML Jaw Couplings?

Advantage	Description
Factory Direct	Competitive B2B pricing – no middlemen
Premium Materials	45# steel or cast iron hubs + high-strength polyurethane spider
Maintenance-Free	No lubrication required – reduces operating costs
Wide Model Range	ML1 to ML12 – covers most industrial applications
GB/T5272-2002 Standard	Manufactured to established standard – quality assured
OEM Customization	Custom bores, keyways, and materials available
ISO9001 Certified	Quality assured manufacturing

FAQ

Q: What is an ML plum blossom coupling?
A: An ML coupling (also called a plum blossom coupling or jaw coupling) is a flexible shaft coupling consisting of two hubs with protruding claws and a plum-shaped polyurethane spider. It transmits torque while absorbing shock, dampening vibration, and compensating for misalignment.

Q: What materials are used?
A: The hubs are made of 45# steel, cast iron, ductile iron, or stainless steel (custom). The spider is made of high-strength polyurethane (PU) – oil-resistant, wear-resistant, and electrically insulating.

Q: Does the coupling require lubrication?
A: No. The ML coupling is maintenance-free – no lubrication required.

Q: What is the torque and speed range?
A: The ML series covers 16–5600 N·m nominal torque and speeds up to 15300 RPM.

Q: What is the operating temperature range?
A: The operating temperature range is -35°C to +80°C.

Q: What are the common applications?
A: Mining, metallurgy, petroleum, chemical, hoisting, transportation, light industry, textile, pumps, fans, printing, packaging, and woodworking machinery.

Q: What standard is this coupling manufactured to?
A: The ML coupling is manufactured to GB/T5272-2002 (replacing GB5272-85).

Q: Can I get a custom coupling?
A: Yes. We offer OEM customization – custom bores, keyways, and materials available.

Q: What is the spider material?
A: The spider is made of high-strength polyurethane – offering excellent wear resistance, oil resistance, and long service life.

Request a Quote

Send us your model (e.g., ML4), bore size, torque, speed, and application details. Our engineers will recommend the optimal model and provide a quotation within 24 hours.