9 mm German-Type Worm-Drive Hose Clamps
A DIN 3017-style worm drive hose clamp with a non-perforated 9mm band, rolled edges and controlled clamping force for secure, hose-friendly connections in automotive, machinery, ventilation and fluid-handling systems.
- Heavy-duty non-perforated band
- Rolled edges protect the hose surface
- W1, W2, W4 and W5 material options
- Compact 7mm screw configuration
Designed for Secure Clamping Without Cutting the Hose
The 9mm German type hose clamp uses a solid, non-perforated metal band rather than an open-slot band. The smooth internal surface distributes pressure more evenly around the hose and reduces the risk of soft rubber or silicone being forced into perforations.
Rolled band edges further reduce the possibility of cutting, pinching or marking the hose during tightening. The compact housing and screw assembly provide reliable adjustment where installation space is limited.
- Even radial pressure helps maintain a consistent seal.
- Non-perforated band construction supports delicate hose materials.
- Rolled edges reduce damage caused by sharp band surfaces.
- Compact geometry is suitable for crowded equipment layouts.
Reliable Sealing for Demanding Hose Connections
The clamp combines controlled tightening, vibration resistance and material flexibility for equipment that requires dependable, serviceable hose joints.
Even Clamping Force
The smooth band applies pressure around the hose more uniformly, helping create a tight seal without concentrated pressure points.
Hose Surface Protection
Rolled edges and a non-perforated inner surface help protect rubber, silicone and other flexible hose materials from abrasion and cutting.
Vibration Resistance
The screw-driven housing maintains controlled tension and supports stable connections in automotive, machinery and ventilation applications exposed to regular vibration.
Corrosion-Resistant Options
Galvanized steel, 200/300-series stainless steel and SS316 configurations allow the clamp material to be matched to the operating environment.
What the German Type Hose Clamp Helps Prevent
A hose joint can fail even when the hose itself remains in good condition. The correct clamp design helps address common sealing and installation problems at the connection point.
Hose Damage from Perforated Bands
The non-perforated band prevents soft hose material from extruding through open slots while the clamp is tightened.
Leaks Caused by Uneven Pressure
More uniform pressure around the hose helps reduce localized gaps between the hose, fitting and clamp.
Clamp Loosening Under Vibration
The worm gear mechanism provides controlled adjustment and helps maintain tension in equipment exposed to movement and recurring vibration.
Limited Installation Space
The narrow 9mm band and compact housing make the clamp easier to position around small hoses and crowded assemblies.
9 mm German-Type Worm-Drive Hose Clamp Specifications
Select the material combination according to the required corrosion resistance, service environment and project cost.
| Parameter | Galvanized Steel Version | Stainless Steel Version |
|---|---|---|
| Band Width | 9mm | 9mm |
| Band Thickness | 0.7mm | 0.6mm |
| Clamp Construction | Non-perforated band with rolled edges | Non-perforated band with rolled edges |
| Screw Size | 7mm | 7mm |
| Screw Drive | Slotted or cross-head configuration | Slotted or cross-head configuration |
| Size Availability | Starting from 8–12mm | Starting from 8–12mm |
| Reference Standard | DIN 3017-style construction | DIN 3017-style construction |
W1, W2, W4 and W5 Material Configurations
The band, screw and housing can be supplied in different material combinations to balance corrosion resistance and procurement cost.
| Material Grade | Band | Screw | Housing |
|---|---|---|---|
| W1 | Galvanized steel | Galvanized steel | Galvanized steel |
| W2 | 200/300-series stainless steel | Galvanized steel | 200/300-series stainless steel |
| W4 | 200/300-series stainless steel | 200/300-series stainless steel | 200/300-series stainless steel |
| W5 | SS316 | SS316 | SS316 |
For Automotive, Machinery and Fluid Line Connections
The 9mm German type worm drive hose clamp is used where a compact, adjustable and hose-friendly connection is required. It is suitable for both maintenance replacement and production assembly.
How to Specify the Correct Hose Clamp
Accurate sizing and material selection help the clamp provide sufficient sealing force without overtightening the hose.
Measure the Installed Diameter
Measure the outside diameter of the hose after it has been fitted over the pipe, connector or hose barb.
Select the Clamp Range
Choose a size range that places the installed hose diameter near the middle of the clamp’s adjustment range.
Confirm the Material Grade
Select W1, W2, W4 or W5 according to moisture, chemicals, corrosion exposure and operating conditions.
Confirm Application Conditions
Provide operating temperature, pressure, hose material and installation environment when requesting a quotation.
German Type Hose Clamp FAQ
Practical answers for engineers, distributors and industrial buyers selecting a 9mm worm drive hose clamp.
What is the difference between a German type hose clamp and a perforated hose clamp?
A German type hose clamp normally uses a solid, non-perforated band with rolled edges. This creates a smoother contact surface and reduces the risk of soft hose material being cut, pinched or pressed through band slots.
Why is a 9mm band used on this worm drive clamp?
The 9mm band provides a compact profile for small and medium hose connections. It is particularly useful where clearance around the hose is limited or where a wider clamp would interfere with nearby components.
How should I choose between W1, W2, W4 and W5?
W1 is a fully galvanized steel option. W2 combines a stainless steel band and housing with a galvanized screw. W4 uses stainless steel for the band, housing and screw. W5 uses SS316 throughout for environments requiring higher corrosion resistance.
Does the rolled edge prevent all hose damage?
Rolled edges significantly reduce the risk of cutting and abrasion, but correct sizing and tightening remain important. A clamp that is too small or excessively tightened can still damage the hose or fitting.
How do I determine the correct clamp size?
Install the hose over its fitting and measure the resulting outside diameter. Choose a clamp range that includes this diameter, preferably without placing the clamp at the extreme minimum or maximum end of its adjustment range.
Can this clamp be used for automotive cooling and fuel lines?
It is commonly used for cooling water, ventilation and automotive hose connections. For fuel or pressurized systems, the final clamp, hose and fitting combination should always be checked against the system pressure, temperature and fluid compatibility requirements.
What information should be included in an RFQ?
Include the clamp size range, material grade, required quantity, hose outside diameter, operating environment and any packaging or marking requirements. Photos or drawings of the connection are also helpful for confirming the correct configuration.
Request a Quote for 9 mm German-Type Worm-Drive Hose Clamps
Send DISLAB PRECISION your required size range, material grade, quantity and application conditions. Our team will review the specification and prepare a suitable quotation.
Explore the Complete Industrial Clamps Range
Download the DISLAB PRECISION Industrial Clamps Catalog to compare clamp families, materials, construction options and typical applications. Use it to shortlist a suitable design, then send us your dimensions, operating conditions and required quantity for 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.
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