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LMS Double Flange Plum Coupling | Maintenance-Free, 25-25000 N·m
Model Number
Check below, custom
LMS1 LMS2 LMS3 LMS4 ….
- Phone : +86 13431039760
- Wechat : +86 13431039760
- Whatsapp : +86 13431039760
- Email : ella@apexcoupling.com
Product Description
LMS Double Flange Plum Coupling – Maintenance-Free, 25-25000 N·m, Radial Spider Change
Factory Direct | 45# Steel / Cast Iron Hubs | Polyurethane Spider | 25-25000 N·m Torque | -35°C to +80°C | Radial Spider Change Without Moving Shafts | GB/T5272-2002 | OEM Customizable
The Apexcoupling LMS series is a high-performance double flange plum coupling engineered for heavy-duty industrial applications where maintenance downtime must be minimized. Featuring a unique double flange design, this coupling allows the polyurethane spider to be replaced radially without moving the connected shafts or realigning equipment – reducing maintenance time from hours to minutes. Manufactured from 45# steel with high-strength polyurethane elastomer, the LMS series delivers exceptional vibration damping, misalignment compensation, and zero-backlash torque transmission. With torque ratings from 25 to 25000 N·m and a wide operating temperature range of -35°C to +80°C, the LMS coupling is the ideal solution for mining, metallurgy, conveyors, pumps, fans, and heavy industrial machinery.
✅ Radial spider change – no shaft movement, no realignment. Maintenance-free polyurethane spider – no lubrication required. High misalignment compensation – angular, radial, and axial. Wide temperature range -35°C to +80°C. GB/T5272-2002 standard – quality assured.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Brand | Apexcoupling |
| Model Series | LMS (Double Flange Plum Coupling) |
| Also Known As | MLS series (original designation), double-flange jaw coupling |
| Standard | GB/T5272-2002 |
| Type | Flexible / Jaw / Plum blossom / Spider |
| Structure | Two hubs + split double flange ring + polyurethane spider |
| Hub Material | 45# steel / Cast iron (LMS1-LMS8) / Ductile iron (LMS9-LMS13) |
| Surface Treatment | Natural, black oxide |
| Spider Material | High-strength polyurethane (PU) – wear-resistant, oil-resistant |
| Spider Hardness Options | 80 Shore A (a) / 60 Shore D (b) |
| Backlash | Zero – no rotational clearance |
| Bore Tolerance | H7 |
| Bore Diameter Range | 12 – 160 mm (varies by model) |
| Nominal Torque Range | 25 – 25000 N·m |
| Maximum Speed | 6200 – 15300 RPM (varies by model) |
| Operating Temperature | -35°C to +80°C |
| Misalignment Compensation | Angular, radial (parallel), and axial |
| Vibration Damping | Excellent – polyurethane spider absorbs shock |
| Maintenance | None required – maintenance-free |
| Customization | OEM – custom bores, keyways |
| Applicable Industries | Mining, metallurgy, petroleum, chemical, hoisting, transport, light industry, textile, pumps, fans, conveyors, heavy machinery |
| Place of Origin | Guangdong, China |
Radial Spider Change – The LMS Advantage
The double flange design is the defining feature of the LMS series, offering a significant maintenance advantage over standard LM couplings:
| Feature | Standard LM Coupling | LMS Double Flange Coupling |
|---|---|---|
| Spider replacement | Requires axial hub movement | Radial flange removal – no shaft movement |
| Equipment realignment | Required after maintenance | Not required |
| Axial space required | Hub slide clearance needed | Standard L0 only |
| Maintenance downtime | Hours | 20-45 minutes |
| Best for | General drives with easy axial access | Fixed-shaft drives, heavy plant, high-maintenance frequency |
✅ How it works: The LMS coupling replaces the monolithic hub body with a removable outer flange ring. To replace the spider, simply unbolt the outer flange ring, slide it radially to expose the spider lobes, extract the worn spider, insert the new polyurethane element, replace the flange ring, and retorque the bolts. Both machines stay in their aligned positions throughout – no shaft movement, no realignment required.
Total elapsed time: 20-30 minutes for sizes up to LMS8; under 45 minutes for LMS9 and above.
Product Structure
Two Hubs – Precision-machined from 45# steel or cast iron with H7 bores.
Split Double Flange Ring – Removable outer flange ring on one hub for radial spider access.
Polyurethane Spider – High-strength elastomer that transmits torque, absorbs shock, and compensates for misalignment.
Flange Bolts – Secure the flange ring to the hub.
💡 How it works: The LMS coupling consists of two hubs with a polyurethane spider between them. The double flange design allows the spider to be replaced without moving the connected shafts – simply remove the flange ring, replace the spider radially, and reinstall the flange ring. The polyurethane spider transmits torque while absorbing shock, dampening vibration, and compensating for angular, radial, and axial misalignment. The zero backlash design ensures precise positioning, while the maintenance-free polyurethane spider requires no lubrication.
Product Features & Advantages
| Advantage | Benefit |
|---|---|
| Radial Spider Change | Replace spider without moving shafts or realigning equipment – reduces downtime by up to 80% |
| Maintenance-Free | No lubrication required – reduces operating costs |
| Zero Backlash | No rotational clearance – precise torque transmission |
| Polyurethane Spider | Excellent wear resistance, oil resistance, and vibration damping – long service life |
| High Misalignment Compensation | Accommodates angular, radial, and axial deviations – protects bearings and seals |
| Wide Temperature Range | -35°C to +80°C – suitable for diverse environments |
| High Load Capacity | 25-25000 N·m – handles heavy-duty applications |
| Compact Design | Small radial dimensions – saves installation space |
| GB/T5272-2002 Standard | Manufactured to established Chinese national standard – quality assured |
| OEM Customization | Custom bores and keyways available |
Applications
Mining Equipment – Conveyors, crushers, feeders
Metallurgical Equipment – Rolling mills, continuous casting lines
Petroleum Equipment – Oil and gas machinery
Chemical Industry – Agitators, pumps, compressors
Hoisting & Transport – Cranes, elevators, conveyors
Pumps – Centrifugal, gear, and diaphragm pumps
Fans & Blowers – Industrial ventilation systems
Textile Machinery – Spinning and weaving equipment
Heavy Machinery – General industrial power transmission
Why Choose Apex Coupling for LMS Couplings?
| Advantage | Description |
|---|---|
| Factory Direct | Competitive B2B pricing – no middlemen |
| Radial Spider Change | No shaft movement – reduces downtime |
| Premium Materials | 45# steel hubs + polyurethane spider – durable and reliable |
| Maintenance-Free | No lubrication required – reduces operating costs |
| Wide Model Range | LMS1 to LMS12 – covers most industrial applications |
| GB/T5272-2002 Standard | Manufactured to established standard – quality assured |
| OEM Customization | Custom bores and keyways available |
FAQ
Q: What is the advantage of the double flange design?
A: The double flange design allows for radial spider replacement without moving the connected shafts or realigning equipment – reducing maintenance downtime from hours to minutes.
Q: Does the coupling require lubrication?
A: No. The LMS series is maintenance-free – the polyurethane spider requires no lubrication.
Q: What materials are used?
A: The hubs are made of 45# steel or cast iron. The spider is made of high-strength polyurethane (PU) .
Q: What is the operating temperature range?
A: The operating temperature range is -35°C to +80°C.
Q: What is the torque range?
A: The LMS series covers 25 – 25000 N·m nominal torque.
Q: What are the common applications?
A: Mining, metallurgy, petroleum, chemical, hoisting, transport, pumps, fans, conveyors, and heavy machinery.
Q: Can I get a custom coupling?
A: Yes. We offer OEM customization – custom bores and keyways available.
Request a Quote
Send us your model (e.g., LMS4), bore size, torque, speed, and application details. Our engineers will recommend the optimal model and provide a quotation within 24 hours.
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