Swiss-engineered StepLess® ear clamps, reusable low profile clamps, screw clamps, and process-reliable installation tooling. HeTone supplies the full Oetiker clamping program across Asia with engineering support and local stock.
Oetiker is the world leader in connecting and clamping solutions, with more than 80 years of Swiss engineering behind every clamp. Its StepLess® ear clamps, reusable low profile clamps, and screw clamps are specified by major OEMs in automotive, data center liquid cooling, medical, and industrial systems, engineered around four pillars: leak-free performance, process reliability, ergonomic design, and built-to-last durability.
HeTone distributes the full Oetiker clamp range together with its matched installation tooling: pneumatic and cordless pincers with closure verification for high-volume assembly, and hand installation tools for service and prototyping. We support design-in from sample evaluation and tooling selection through volume supply with local inventory in Asia; Oetiker quick-connect fittings and further connection lines are available on request.
Single-closure ear clamps with a 360° leak-free seal, high radial load, and built-in compensation for component tolerances. Series 193 uses stainless steel 1.4301; series 123 uses zinc-plated high-strength steel; diameters below 18.0 mm are covered by the StepLess® 167 design.
6.5 – 120.5 mmStainless steel low profile clamps that can be opened and re-installed up to 5 times. The tensioning-hook design enables fast, monitored high-volume assembly, while curled edges cut closing force and protect clamped parts.
22.5 – 41.0 mmScrew clamps adjustable across multiple diameters with a 360° leak-free seal. Stainless construction with an aerospace-quality 17-7PH spring in the self-tensioning variant; reusable, with an installation aid for large diameters.
18.0 – 255.0 mm
The 360° leak-free seal comes from the details. A tongue-in-groove design keeps the band's underside smooth and step-free around the full circumference, while the dimple, interlock, and security hook secure the closed clamp. The result is high radial load with built-in compensation for component tolerances.
Purpose-built hooks make the 268 genuinely serviceable. Tensioning and release hooks let the clamp close and re-open up to five times, with Oetiker pincers for monitored serial assembly or common pliers in the field. A pre-retaining hook holds the open geometry together in transport, and curled edges cut closing force while protecting the clamped surface.
The interlock accepts multiple diameter positions, so a single 178 covers a wide adjustment range on hoses up to 255 mm. The bridge and tongue-in-groove design keep the seal stepless, an installation aid eases handling at large diameters, and the self-tensioning variant adds an aerospace-grade 17-7PH spring.
Clamps are only as reliable as their installation. Pneumatic pincers serve high-volume lines, cordless pincers bring the same process reliability anywhere on the floor, and both verify every closure. Hand installation tools with high mechanical advantage cover service work, prototyping, and small batches.
Measured values from our application engineering materials. Contact us for complete datasheets and lot-specific certificates.
| Clamp rangemm · 0.5 mm graduation | Band width × thicknessmm | Ear widthmm |
|---|---|---|
| 18.0 – 120.5 | 7 × 0.6 | 10.7 |
| 30.0 – 120.5 | 7 × 0.6 | 13.0 |
| 18.0 – 120.5 | 7 × 0.8 | 10.7 |
| 30.0 – 120.5 | 7 × 0.8 | 13.0 |
Values from HeTone application engineering materials, request official datasheets for design sign-off.
| Clamp rangemm · 0.5 mm graduation | Band width × thicknessmm | Ear widthmm |
|---|---|---|
| 24.5 – 120.5 | 10 × 0.8 | 10.7 |
| 30.0 – 120.5 | 10 × 0.8 | 13.0 |
| 24.5 – 120.5 | 10 × 1.0 | 10.7 |
| 30.0 – 120.5 | 10 × 1.0 | 13.0 |
Values from HeTone application engineering materials, request official datasheets for design sign-off.
| Clamp | Salt-spray resistanceh · DIN EN ISO 9227 | Band material |
|---|---|---|
| StepLess® 123 | ≥ 96 | High-strength steel 1.0934, zinc-plated band |
| StepLess® 123 (galvanized) | ≥ 144 | High-strength steel 1.0934, galvanized band |
| StepLess® 193 | ≥ 1000 | Stainless steel 1.4301 / UNS S30400 |
Values from HeTone application engineering materials, request official datasheets for design sign-off.
| Family | Clamp rangemm | Bandmm | Material | Key trait |
|---|---|---|---|---|
| Low Profile 268 | 22.5 – 41.0 | 9.0 × 1.0 | Stainless steel 1.4301 / UNS S30400 | Reusable up to 5 times; ≥1000 h salt-spray resistance |
| StepLess® Screw 178 | 18.0 – 255.0 | 9.0 × 0.6 | 1.4301 band · 1.4319 screw · 17-7PH spring | Adjusts across multiple diameters; self-tensioning option |
Values from HeTone application engineering materials, request official datasheets for design sign-off.
Send us your thermal requirements, we will recommend and validate the right material combination for your design.