Drum Gear Couplings
Symuren Drum Gear Couplings are designed to transmit high torque between connected shafts while accommodating specified angular misalignment. With bore diameters up to 1,200 mm and torque capacity up to 8,190,000 N·m, they are suitable for demanding industrial transmission applications.
Product Introduction
Symuren Drum Gear Couplings are designed to transmit high torque between connected shafts while accommodating specified angular misalignment. With bore diameters up to 1,200 mm and torque capacity up to 8,190,000 N·m, they are suitable for demanding industrial transmission applications.
Key Specifications
|
Parameter |
Specification |
|
Maximum Bore Diameter |
Up to 1,200 mm |
|
Maximum Torque Capacity |
Up to 8,190,000 N·m |
|
Maximum Angular Misalignment |
Up to 1.5° |
|
Parallel Misalignment |
Approx. 0.5 mm, depending on size |
|
Tooth Profile |
Crowned |
|
Material Options |
42CrMo / 40Cr |
|
Lubricant |
EP2 lithium-based grease |
How Drum Gear Couplings Accommodate Shaft Misalignment
Drum Gear Couplings transmit torque through meshing external and internal gear teeth. The crowned external teeth accommodate limited angular misalignment while maintaining gear engagement.
Angular misalignment: Up to 1.5°, depending on the model and operating conditions.
Parallel misalignment: Approximately 0.5 mm, depending on coupling size.
Selection Note: Allowable misalignment must be evaluated together with torque, speed, and operating conditions. Maximum angular and parallel misalignment values should not be assumed to apply simultaneously.
Match the Coupling to Your Drive System
Final selection should account for torque, speed, shaft dimensions, and operating misalignment within the limits of the selected model.
|
Selection Factor |
Information to Confirm |
|
Torque |
Continuous torque, peak loads, and starting conditions |
|
Shaft Dimensions |
Shaft diameters, keyways, and connection geometry |
|
Operating Speed |
Required rpm and model-specific speed limits |
|
Misalignment |
Angular and parallel offsets under operating conditions |
|
Installation Space |
Overall length, outside diameter, and mounting arrangement |
|
Operating Environment |
Temperature, dust, vibration, and maintenance access |
Engineering Application Considerations
High-Impact Loads: For frequent starts, stops, or sudden load changes, evaluate peak torque, shock frequency, and load cycles rather than relying on nominal torque alone.
Coupling Damage Assessment: If tooth wear, pitting, or breakage occurs, review the damage pattern, lubrication condition, and operating history to help identify the cause before replacing components.
Dusty Environments: Inspect seals for damage and check for grease contamination. Adjust maintenance intervals according to actual contamination levels and operating conditions.
Materials, Manufacturing and Quality Control
Materials and Manufacturing
Material options include 42CrMo and 40Cr, depending on component design. Manufacturing may include gear-tooth machining, bore and keyway machining, and specified heat treatment.
Key Inspection Items
• Dimensions: Bore diameter, keyways, overall length, and critical tolerances.
• Gear Teeth: Tooth profile and conformity to approved drawings.
• Material and Heat Treatment: Compliance with specified material grades and heat-treatment requirements.
Quality Control and Documentation
• Drawing Review: Confirm dimensions, tolerances, materials, and technical requirements before production.
• In-Process Inspection: Check critical dimensions and specified manufacturing requirements during production.
• Final Acceptance: Inspect the finished coupling against approved drawings and technical requirements agreed by both parties before shipment.
• Quality Documents: Supply material certificates, dimensional inspection reports, and heat-treatment records as agreed in the order.
Replacement Couplings and Compatibility Checks
To assess replacement compatibility, Symuren recommends providing the following information:
Part Details: Existing coupling model, manufacturer, or equipment nameplate.
Connection Dimensions: Shaft diameters, keyways, and relevant fitting dimensions.
Installation Dimensions: Overall length, outside diameter, and mounting arrangement.
Technical References: Existing drawings, photographs, or part numbers.
Operating Conditions: Torque, speed, and shaft misalignment.
Compatibility Check Process
Submit available drawings, dimensions, or photographs.
Review connection dimensions, installation space, and operating requirements.
Confirm the replacement specifications before ordering.
If original drawings are unavailable, measured dimensions and clear photographs can support preliminary identification.
Lubrication and Maintenance Schedule
Symuren recommends EP2 lithium-based grease for the stated application, subject to confirmation of the lubricant specification and operating conditions.
|
Operating condition |
Recommended grease replacement interval |
|
Normal conditions |
Every 3 months |
|
Dusty or high-temperature environments |
Every 2 months |
During maintenance, inspect grease condition, seal integrity, leakage, tooth wear, and signs of overheating or abnormal vibration.
Standard Supply and Custom Manufacturing
Standard Sizes: Selected standard configurations are available from stock, subject to inventory confirmation.
Custom Manufacturing: Non-standard dimensions can be manufactured according to approved drawings and technical requirements.
Lead Time: Custom orders typically require approximately 15–25 days, subject to drawing approval, order specifications, and production scheduling.
FAQ
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