Basic Specifications
Material
W4 Stainless Steel
Packaging
Plastic Bag Placed in Box, Box on Pallet
Clamping Range
10 mm-16 mm (0.39"-0.63")
Band Thickness
0.6 mm (0.024")
Non-perforated Worm Gear Hose Clamps (WN)
Worm gear hose clamps, also known as worm drive hose clamps or DIN 3017 German type hose clamps, feature a non-perforated band design. This German-type clamp offers high clamping force, exceptional vibration resistance, and optimal hose protection. The smooth non-perforated bands and rolled edges effectively eliminate hose abrasion, making them especially suited for soft silicone hoses.
Material, clamping range, and custom logos can be stamped on the band upon request.
Technical Parameters
| Feature |
Specification Details |
| Product Series | WN |
| Band Width | 9 mm (0.35") and 12 mm (0.47") |
| Diameter Range | 8-12 mm to 180-200mm (0.32"-7.87") |
| Band Thickness | 0.6 mm (0.024") for both widths |
| Material Options | W1, W2, W4, W5 available |
| Suggested Torque | Varies by width and material (see torque table) |
| Packaging | Plastic bag in box, palletized |
Material Classification
| Code |
Corrosion Resistance |
Material Composition |
| W1 | Normal | Screw, Housing, and Band are all zinc plated. |
| W2 | Average | Screw is zinc plated; Housing and Band are 201/304 stainless. |
| W4 | High | Screw, Housing, and Band are all 201/304 stainless steel. |
| W5 | Maximum | Screw, Housing, and Band are all 316 stainless steel. |
Diameter Range Selection
| Range (mm) |
Range (inch) |
Range (mm) |
Range (inch) |
| 8-12 | 0.32-0.47 | 10-16 | 0.39-0.63 |
| 12-20 | 0.47-0.79 | 12-22 | 0.47-0.87 |
| 16-25 | 0.63-0.98 | 20-32 | 0.79-1.26 |
| 25-40 | 0.98-1.57 | 32-50 | 1.26-1.97 |
| 50-70 | 1.97-2.76 | 70-90 | 2.76-3.54 |
| 100-120 | 3.94-4.72 | 140-160 | 5.51-6.30 |
Installation Torque Standards
| Material |
9mm Free Torque |
9mm Breaking Torque |
12mm Free Torque |
12mm Breaking Torque |
| W1 | ≤ 0.8 Nm | ≥ 5.5 Nm | ≤ 0.8 Nm | ≥ 6.0 Nm |
| W2/W4/W5 | ≤ 0.6 Nm | ≥ 6.0 Nm | ≤ 0.6 Nm | ≥ 7.0 Nm |
Wide Range of Applications
- Automotive Industry - Fuel hoses, coolant lines, radiator pipes, and air intake connections.
- Industrial Equipment - Machinery, compressors, and hydraulic systems for oil and air hoses.
- Marine & Offshore - Corrosion-resistant sealing for boat engines and marine pipelines.
- Plumbing & HVAC - Water hoses, drain pipes, and ventilation ducts.
- Agricultural Machinery - Hydraulic and pneumatic hoses on tractors and excavators.
- Chemical Processing - Sanitary hose connections where non-perforated bands prevent contamination.
Core Product Advantages
- High Quality & Reliability: Premium stainless steel resistant to harsh environments.
- Consistent Clamping Force: Constant torque design prevents leaks under vibration.
- Hose Protection: Non-perforated band with rolled edges prevents hose damage.
- Fast Delivery: Efficient logistics systems ensure timely global shipment.
- OEM & ODM Support: Custom sizes and packaging to meet specific requirements.
Frequently Asked Questions
Q1: What is the benefit of a non-perforated band?
A: Unlike perforated bands, the smooth inner surface and rolled edges protect the hose from being cut or abraded during tightening, which is critical for soft silicone or rubber hoses.
Q2: What do the material codes W1, W2, W4, and W5 stand for?
A: These codes indicate the level of corrosion resistance. W1 is fully zinc-plated steel, while W4 is full 304 stainless steel and W5 is full 316 stainless steel for maximum marine-grade protection.
Q3: Are these clamps resistant to vibration?
A: Yes, the German-type design features a symmetric housing that ensures even distribution of tension and excellent resistance to loosening under high-vibration conditions.
Q4: Can I get a custom logo on the hose clamps?
A: Yes, we provide OEM services where the material grade, clamping range, and your specific logo can be stamped directly onto the metal band.
Q5: How do I select the correct clamping size?
A: Measure the outside diameter (OD) of your hose after it has been pushed onto the fitting. Choose a clamp range where your measured OD falls near the middle of the range.
Q6: What industries commonly use WN series clamps?
A: They are widely used in the automotive, industrial machinery, marine, and HVAC industries due to their high torque capacity and reliability.
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