15.8 mm Constant Torque Hose Clamp
The DISLAB PRECISION 15.8 mm constant torque hose clamp combines worm-drive adjustment with a Belleville spring compensation mechanism. It is designed to maintain more consistent clamping pressure as a hose expands, contracts or relaxes during temperature changes, vibration and extended operating cycles.
Constant Clamping Support for Changing Hose Conditions
Standard worm-drive clamps remain in a fixed tightened position. When a hose changes in diameter because of heat, cold, vibration or material relaxation, the original clamping force may decrease. A constant torque clamp adds an elastic compensation system that follows these dimensional changes more effectively.
How the Clamp Operates
The clamp is installed by tightening the worm-drive screw around the hose and fitting. The Belleville spring stack is compressed during installation and continues to transfer controlled force into the clamp band.
As the hose connection expands or contracts, the spring assembly can change its compressed height. This helps the clamp maintain sealing pressure without relying on a completely rigid adjustment.
Designed for Demanding Hose Joints
The 15.8 × 0.8 mm band provides a wider and heavier construction than lighter-duty worm-drive clamps. Rolled band edges and the extended liner help distribute pressure and protect flexible hose surfaces from localized damage.
The design is suitable for vehicle cooling, air-intake and industrial fluid-transfer connections where temperature movement and vibration are common.
What Problems Does a Constant Torque Clamp Help Solve?
The clamp is intended for hose assemblies where a fixed-tension clamp may lose effective sealing pressure as operating conditions change.
Cold-Flow Leakage
Rubber and silicone hoses can gradually relax after installation. The spring-compensated design helps reduce the loss of clamping pressure associated with hose cold flow.
Thermal Expansion and Contraction
Cooling and intake hoses repeatedly change dimensions as operating temperatures rise and fall. The Belleville spring mechanism helps the clamp respond to these changes.
Hose Surface Damage
The extended inner liner separates the hose from the working area of the outer band, while rolled edges help prevent cutting, pinching and excessive surface marking.
Frequent Retightening
A spring-loaded clamp can maintain a more consistent load over changing conditions, helping reduce unnecessary maintenance and repeated manual adjustment in suitable applications.
15.8 mm Constant Torque Clamp Structure
Each component has a specific function in maintaining adjustment, spring compensation, pressure distribution and hose protection.
Why Buyers Select 15.8 mm Constant Torque Hose Clamps
The wider band and spring-compensated assembly are designed for applications requiring more stable sealing pressure than a conventional light-duty worm-drive clamp can provide.
Automatic Load Compensation
The spring pack can increase or decrease its working height as the hose connection changes, helping maintain a more consistent sealing load.
Reduced Leakage Risk
More stable pressure around the hose connection helps reduce leakage caused by temperature cycling, material relaxation and vibration.
Improved Hose Protection
Rolled edges and an extended inner liner help prevent localized pressure points, cutting and extrusion of softer hose materials.
Heavy-Duty Construction
The 15.8 mm wide and 0.8 mm thick band is suitable for larger hose diameters and demanding commercial vehicle or industrial applications.
Band Dimensions, Size Range and Material Options
Select the clamp according to the measured outside diameter of the installed hose, required corrosion resistance and operating environment.
| Specification | Details |
|---|---|
| Product Name | 15.8 mm Constant Torque Worm Drive Hose Clamp |
| Nominal Band Width | 15.8 mm |
| Band Thickness | 0.8 mm |
| Compensation Mechanism | Belleville spring stack |
| Band Protection | Rolled edges and extended inner liner |
| Material Options | W2 and W4 |
| Available Diameter Range | 25–232 mm across listed size options |
Available Clamp Size Ranges
| Clamping Range | Band Width | Thickness |
|---|---|---|
| 25–45 mm | 15.8 mm | 0.8 mm |
| 32–54 mm | 15.8 mm | 0.8 mm |
| 45–66 mm | 15.8 mm | 0.8 mm |
| 57–79 mm | 15.8 mm | 0.8 mm |
| 70–92 mm | 15.8 mm | 0.8 mm |
| 83–105 mm | 15.8 mm | 0.8 mm |
| 95–117 mm | 15.8 mm | 0.8 mm |
| 108–130 mm | 15.8 mm | 0.8 mm |
| Clamping Range | Band Width | Thickness |
|---|---|---|
| 121–143 mm | 15.8 mm | 0.8 mm |
| 134–156 mm | 15.8 mm | 0.8 mm |
| 146–168 mm | 15.8 mm | 0.8 mm |
| 159–181 mm | 15.8 mm | 0.8 mm |
| 172–194 mm | 15.8 mm | 0.8 mm |
| 184–206 mm | 15.8 mm | 0.8 mm |
| 197–219 mm | 15.8 mm | 0.8 mm |
| 210–232 mm | 15.8 mm | 0.8 mm |
W2 and W4 Material Configurations
| Material Class | Band, Housing and Washer | Screw | Typical Selection Consideration |
|---|---|---|---|
| W2 | SS300 or SS400 series | Carbon steel | General industrial and vehicle applications where a carbon-steel screw configuration is acceptable. |
| W4 | All components in SS304 | SS304 | Applications requiring a fully stainless steel clamp configuration and improved corrosion resistance. |
Additional sizes and material configurations can be produced according to customer requirements. Confirm the hose outside diameter, material, operating temperature, fluid type, working pressure and order quantity before production.
Where 15.8 mm Constant Torque Clamps Are Used
These clamps are commonly selected for hose connections exposed to temperature cycling, vibration, pressure changes and long operating periods.
Commercial Vehicle Cooling Systems
Suitable for radiator hoses, engine coolant lines and charge-air cooler connections on trucks, buses and other commercial vehicles.
Passenger Vehicle Hose Assemblies
Used on vehicle cooling and air-intake hose joints where thermal cycling can reduce the sealing load of a conventional clamp.
Turbocharger and Intake Systems
Suitable for turbo hoses, intercooler connections and air-intake assemblies exposed to heat, pressure fluctuation and vibration.
Heavy Equipment and Industrial Systems
Applied to construction machinery, mining equipment, HVAC systems and industrial fluid-transfer hoses requiring stable clamping pressure.
DISLAB PRECISION Industrial Clamps Catalog
View the complete collection of constant torque clamps, worm-drive clamps, T-bolt clamps, bridge clamps and other industrial fastening products. PDF file size: approximately 48 MB.
Frequently Asked Questions
Technical and sourcing information for selecting a 15.8 mm constant torque clamp for vehicle or industrial hose assemblies.
What does 15.8 mm refer to on this clamp?
The 15.8 mm measurement refers to the nominal width of the steel band. The listed band thickness is 0.8 mm.
How is a constant torque clamp different from a standard worm-drive clamp?
A standard worm-drive clamp remains at a fixed adjusted position. A constant torque clamp includes a Belleville spring assembly that helps compensate for dimensional changes in the hose connection.
Does the clamp help prevent cold-flow leakage?
The spring-compensated design helps reduce clamping-force loss as rubber or silicone hose material relaxes over time, which can lower the risk of cold-flow leakage.
What is the purpose of the extended inner liner?
The extended liner creates a smoother contact surface between the clamp and the hose. It helps distribute pressure and protects the hose from cutting, pinching and extrusion.
What is the difference between W2 and W4?
The listed W2 version uses stainless steel for the band, housing and washer with a carbon-steel screw. The listed W4 version uses SS304 for all components.
How should the correct clamp size be selected?
Measure the outside diameter of the hose after it is installed on the fitting. Select a clamp range that contains this measured diameter without placing the adjustment near the extreme end of the range.
Can DISLAB PRECISION supply sizes outside the listed range?
Other sizes and material configurations can be evaluated according to the required hose diameter, application, quantity and operating conditions.
What information should be included in a quotation request?
Provide the hose outside diameter, clamp size range, W2 or W4 material requirement, operating temperature, fluid type, order quantity and packaging requirements.
Source 15.8 mm Constant Torque Hose Clamps for Your Project
DISLAB PRECISION supplies constant torque hose clamps for commercial vehicles, passenger vehicles, cooling systems, intake assemblies and industrial hose connections. Send your required diameter, material, quantity and operating conditions for specification review.
Request a Hose Clamp Quotation
Tell us the clamp type, installed hose outside diameter, preferred material, required quantity, application and destination country. Our team will review the details and respond with practical specification and quotation guidance.
Need to send drawings or specifications?
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