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Help CenterGrid Coupling for Pumps, Motors & Gearboxes | Flexible Mechanical Coupling Supplier
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Snake Spring Coupling – Detailed Description (Serpentine / Grid Coupling)
1. Product Features & Working Principle
1.1 Structure and Working Principle
Our Grid Coupling is a high-performance flexible mechanical coupling designed specifically for connecting motors, pumps, gearboxes, and other heavy-duty rotating equipment. Unlike traditional rigid or elastomeric couplings, the grid coupling utilizes a specially shaped spring steel grid element that flexes under load to absorb shock, dampen vibration, and compensate for angular, parallel, and axial misalignment. This unique design delivers up to 36% vibration reduction and near-zero backlash, ensuring smooth power transmission and extended service life for your drivetrain components. Ideal for heavy-duty applications such as conveyor drives, crushers, compressors, and industrial pumps, our flexible grid coupling reduces maintenance downtime and protects expensive machinery from damaging peak loads. Whether you need a pump coupling for a water treatment plant, a motor coupling for a production line, or a gearbox coupling for a mining conveyor, our grid coupling offers a reliable, cost-effective solution that outperforms conventional alternatives. Manufactured from high-strength spring steel with optional stainless steel for corrosive environments, each coupling is ISO 9001 certified and available in standard torque ratings from 5 Nm to 2000 Nm, with custom bores and configurations to match your exact shaft dimensions.
1.2 Core Performance Parameters
Parameter |
Value / Description |
Remarks |
|---|---|---|
Vibration damping rate |
Up to 36% |
Spring absorbs shock and vibration |
Transmission efficiency |
99.47% |
Near rigid transmission |
Short-term overload |
2–3 times rated torque |
Reliable operation |
Operating temperature |
–30 ~ +150 °C (heavy/mining standard); Our page: –30 ~ +120 °C, special material ≥250 °C |
High temperature requires customized spring steel heat treatment |
Maximum speed |
Small/medium range ≤ 10,000 rpm; JS heavy/mining range 1,500–5,000 rpm |
|
Torque range |
Our page: 5–500 Nm (customizable up to 2,000 Nm); JS national standard series: 160–160,000 N·m |
1.3 Common Structural Types (Domestic JS Series System)
Note: Your current page focuses on small/medium torque general-purpose models with customization options. The JS heavy/mining series below is provided as an “extended selection for high torque” reference, so you have answers ready when customers ask.
Type |
Code |
Feature |
|---|---|---|
Basic type |
JS |
No brake wheel, most universal |
Axial mounting housing |
JSB |
Housing assembled/disassembled axially |
With brake wheel |
JSZ / JSS |
Cranes, hoists |
With brake disc |
JSP |
Space-limited braking applications |
High-speed type |
JSG |
High rotational speed conditions |
With intermediate shaft |
SJS |
Larger span transmissions |
2. Application Scenarios
Grouped by industry and equipment for easy buyer reference:
Heavy Industry Key Equipment
Mining: Crushers (jaw/cone), ball mills, vibrating screens. In these applications, the snake spring coupling resists strong impact and vibration, extending equipment life.
Metallurgy: Rolling mills, continuous casting machines, hot rolling straighteners. Requires high temperature resistance (+350 °C special material) and ability to handle instantaneous high torque.
Cement production lines: Long-term continuous heavy-load transmission.
Heavy Material Handling & Construction Machinery
Large belt conveyors: Suitable for dusty, high-humidity environments with corrosion-resistant operation.
Crane winches / hoists: Smooth torque transmission; JSS/JSZ types with brake wheels are suitable.
Excavator swing mechanisms: Compensate for dynamic misalignment between hydraulic motor and turntable.
General Industrial Equipment (Your Page’s Main Focus)
Pumps / fans: Reduce starting/stopping shock on shafting, suitable for stable torque conditions.
Gearboxes / reducers: Compensate for installation misalignment, protect bearings.
Compressors, mixers, conveyors.
Servo drives / production lines: Select zero-backlash version with low inertia.
Selection Tip: For stable torque conditions, choose straight-tooth type (JS basic type). For impact load conditions, choose curved-tooth type (optimized load capacity + vibration damping). For heavy duty, prioritize hydraulic expansion sleeve mounting.
3. Purchasing Process (How to Order)
Follow the actual B2B factory-direct path. Buyers can fill in the required information to avoid back-and-forth communication.
Step 1 – Inquiry
Contact the factory/sales and provide the following mandatory technical parameters (missing any one may lead to wrong model selection):
Inquiry Checklist
-
Motor power (kW) + speed (rpm)
-
Shaft diameters on both ends (drive side / driven side – may differ; select based on larger diameter)
-
Installation space constraints (overall length / outer diameter allowance)
-
Misalignment conditions: approximate radial / angular / axial values
-
Operating conditions: continuous or intermittent? Any impact? Ambient temperature? Corrosive environment? (determines spring steel or stainless steel 304/316)
-
Quantity required (affects unit price and delivery time)
The factory can calculate torque and recommend a model based on “power + speed + shaft diameter.” Your page FAQ already promises this – include it in the process.
Step 2 – Model Selection / Drawing
Standard models: Simply provide model number + bore diameter (e.g., SSC-42, drive end Ø30, driven end Ø35).
Non-standard / custom: Provide shaft layout drawing or dimensional sketch; factory provides solution + quotation within 1–2 working days.
Confirmation: Material (spring steel / SS304/316), surface treatment (zinc plating / black oxide / nickel), bore type (keyway / clamp hub).
Step 3 – Sample (Optional)
Sample orders supported; delivery in 7–10 days.
For large first-time orders, sample cost deduction may be negotiable.
Step 4 – Order Confirmation
MOQ: 10 pcs (as stated on your page).
Payment: T/T 30% deposit + 70% against copy of bill of lading (standard international trade terms).
Delivery time: Standard models 15–20 days, custom models 25–35 days; faster if stock available.
Step 5 – Production & Quality Inspection
ISO 9001 process control.
Static balancing (for high-speed models), torque spot check, full dimensional inspection before shipment.
Step 6 – Shipment
Port of loading: Tianjin (also Shanghai or Qingdao available).
Packaging: Wooden case / carton / pallet, standard export packing.
Documents provided: Packing list, commercial invoice, material certificate, certificate of conformity.
Step 7 – After-Sales Service
Installation guidance (video / drawings).
The spring is a wear part; normal service life is long but may shorten under overload or excessive misalignment. After-sales support allows separate purchase of spring strips without replacing the entire coupling – this is a key advantage of the snake spring coupling and should be highlighted in the process.
Send Inquiry to This Supplier
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