--- title: "What Are Constant-Tension Worm Gear Hose Clamps Used For?" description: "Constant-Tension Worm Gear Hose Clamps (Trade series (spring-loaded worm gear clamps)) are used for closing a hose, pipe or duct joint by band tension, selec…" url: https://engineeringhardware.com/applications/constant-tension-worm-gear-hose-clamps/ source: Engineering Hardware & Fasteners --- # What Are Constant-Tension Worm Gear Hose Clamps Used For? Clamps & Couplings · Trade series (spring-loaded worm gear clamps) · Application guide Typical applications, the industries that specify constant-tension worm gear hose clamps, and how to choose the right size, material and finish for the joint. Constant-Tension Worm Gear Hose Clamps are used for closing a hose, pipe or duct joint by band tension, selected by clamp range rather than by thread size. They are manufactured to Trade series (spring-loaded worm gear clamps), and selection is driven by the nominal size, the fit and tolerance the assembly requires, and the service environment. - **Primary duty:** Closing a hose, pipe or duct joint by band tension, selected by clamp range rather than by thread size - **Governing standard:** Trade series (spring-loaded worm gear clamps) - **Category:** Clamps & Couplings Application notes are general engineering guidance. Verify the property class and any approval requirement against your own design calculation. ![What Are Constant-Tension Worm Gear Hose Clamps Used For? application image](https://engineeringhardware.com/wp-content/uploads/2026/09/Constant-Tension-Worm-Gear-Hose-Clamps.webp) Constant-Tension Worm Gear Hose Clamps (Trade series (spring-loaded worm gear clamps)) are specified where the joint requires closing a hose, pipe or duct joint by band tension, selected by clamp range rather than by thread size. The sections below cover the typical end-uses by industry, the size and material decisions for each, assembly practice, and the applications this fastener type is not suited to. ## Typical Applications for Constant-Tension Worm Gear Hose Clamps The most common settings where these are specified: - **General machine building:** fastening covers, brackets, motors and sub-assemblies on production equipment. - **Maintenance & repair (MRO):** a stocked size for servicing existing plant where the original fastener spec must be matched. - **Fabrication & metalwork:** bench and on-site assembly of steel frames, enclosures and weldments. Product catalog ## Related Hose Clamps products [![Adjustable Hydraulic Stainless Steel Cable Tie Throbbing Band Hose Clamp](https://img.engineeringhardware.com/Adjustable-Hydraulic-Stainless-Steel-Cable-Tie-Throbbing-Band-Hose-Clamp.webp)](https://engineeringhardware.com/product/adjustable-hydraulic-stainless-steel-cable-tie-throbbing-band-hose-clamp/) Hose Clamps & Band Clamps ### [Adjustable Hydraulic Stainless Steel Cable Tie Throbbing Band Hose Clamp](https://engineeringhardware.com/product/adjustable-hydraulic-stainless-steel-cable-tie-throbbing-band-hose-clamp/) Standard · Stainless Steel **US$0.0012**MOQ 10,000 pieces [![Stainless Steel Hose Clamps Worm Gear Drive Adjustable W4 American Type Gas Oil Tube Clamp](https://img.engineeringhardware.com/Stainless-Steel-Hose-Clamps-Worm-Gear-Drive-Adjustable-W4-American-Type-Gas-Oil-Tube-Clamp.webp)](https://engineeringhardware.com/product/stainless-steel-hose-clamps-worm-gear-drive-adjustable-w4-american-type-gas-oil-tube/) Hose Clamps & Band Clamps ### [Stainless Steel Hose Clamps Worm Gear Drive Adjustable W4 American Type Gas Oil Tube Clamp](https://engineeringhardware.com/product/stainless-steel-hose-clamps-worm-gear-drive-adjustable-w4-american-type-gas-oil-tube/) Standard · Stainless Steel **US$0.012 – 0.12**MOQ 1,500 pieces [![Zinc Plated Iron Steel W1 Perforated Worm Drive American Type Hose Clip](https://img.engineeringhardware.com/Zinc-Plated-Iron-Steel-W1-Perforated-Worm-Drive-American-Type-Hose-Clip.webp)](https://engineeringhardware.com/product/zinc-plated-iron-steel-w1-perforated-worm-drive-american-type-hose-clip/) Hose Clamps & Band Clamps ### [Zinc Plated Iron Steel W1 Perforated Worm Drive American Type Hose Clip](https://engineeringhardware.com/product/zinc-plated-iron-steel-w1-perforated-worm-drive-american-type-hose-clip/) Perforated Hose Clamp · ANSI, GB **US$0.0012 – 0.36**MOQ 2,000 pieces [![Carbon Steel Stamped Spring Hose Clip Fastener for Automotive Fuel and Brake Line](https://img.engineeringhardware.com/Carbon-Steel-Stamped-Spring-Hose-Clip-Fastener-for-Automotive-Fuel-and-Brake-Line.webp)](https://engineeringhardware.com/product/carbon-steel-stamped-spring-hose-clip-fastener-for-automotive-fuel-and-brake-line/) Hose Clamps & Band Clamps ### [Carbon Steel Stamped Spring Hose Clip Fastener for Automotive Fuel and Brake Line](https://engineeringhardware.com/product/carbon-steel-stamped-spring-hose-clip-fastener-for-automotive-fuel-and-brake-line/) Auto Fasteners · DIN, GB, ISO, ANSI/ASTM, BS, Bsw, JIS etc. **US$0.024 – 0.036**MOQ 20,000 pieces [![High Quality Pretty Tension Adjustable Galvanized Steel Double Wires Hose Clamp Steel Pipe Clamp Bolt Clamp, 94-100mm](https://img.engineeringhardware.com/High-Quality-Pretty-Tension-Adjustable-Galvanized-Steel-Double-Wires-Hose-Clamp-Steel-Pipe-Clamp-Bolt-Clamp-94-100mm.webp)](https://engineeringhardware.com/product/high-quality-pretty-tension-adjustable-galvanized-steel-double-wires-hose-clamp-17/) Hose Clamps & Band Clamps ### [High Quality Pretty Tension Adjustable Galvanized Steel Double Wires Hose Clamp Steel Pipe Clamp Bolt Clamp, 94-100mm](https://engineeringhardware.com/product/high-quality-pretty-tension-adjustable-galvanized-steel-double-wires-hose-clamp-17/) Worm Drive Hose Clamp · DIN, GB **US$0.36 – 0.60**MOQ 1,000 pieces [![Stainless Steel Metric Inch Handle Hose Clamps Polished Surface Lightweight Thumb Screw Pipe Clips ISO9001 Certified](https://img.engineeringhardware.com/Stainless-Steel-Metric-Inch-Handle-Hose-Clamps-Polished-Surface-Lightweight-Thumb-Screw-Pipe-Clips-ISO9001-Certified.webp)](https://engineeringhardware.com/product/stainless-steel-metric-inch-handle-hose-clamps-polished-surface-lightweight-thumb/) Hose Clamps & Band Clamps ### [Stainless Steel Metric Inch Handle Hose Clamps Polished Surface Lightweight Thumb Screw Pipe Clips ISO9001 Certified](https://engineeringhardware.com/product/stainless-steel-metric-inch-handle-hose-clamps-polished-surface-lightweight-thumb/) Standard, 3 · Stainless Steel **US$0.60 – 2.64**MOQ 1,000 pieces [View all Hose Clamps & Band Clamps →](https://engineeringhardware.com/fastener-products/clamps-clips-cable-ties/hose-clamps-band-clamps/) [Full product catalog](https://engineeringhardware.com/products/) ## How to Specify Constant-Tension Worm Gear Hose Clamps for Your Application - **Size:** Match the size to the mating part — see the dimension table below for each option. - **Material:** Choose the material and finish for the service environment — plated steel for general use, stainless for corrosion resistance. - **Environment:** For damp, coastal or chemical exposure prefer A4/316 stainless or a suitable coating; indoors, plated steel or A2 is usually sufficient. - **Standard:** This product is supplied to Trade series (spring-loaded worm gear clamps). Quoting the standard on your order guarantees interchangeable dimensions between suppliers. ## Where Constant-Tension Worm Gear Hose Clamps Are Not the Right Choice Match the fastener to the load, environment and whether the joint must be reopened; the wrong class or style is the usual cause of joint failure. Custom manufacturing · Made to drawing ## Need a constant-tension worm gear hose clamps outside the standard range? The geometry is whatever the drawing says. A machined component has no standard to depart from, so the drawing and the tolerance scheme are the whole specification. Minimum order from 2,000 pieces; samples within 7 days of drawing approval. [Custom hose & band clamp manufacturing](https://engineeringhardware.com/custom/clamps/)[Send a drawing](https://engineeringhardware.com/custom/clamps/#rfq) ## Technical Drawing Dimensioned line drawing of integral belleville spring Constant-Tension Worm Gear Hose Clamps to Trade series (spring-loaded worm gear clamps). Side view and top view, drawn to the dimensions in the table below and redrawn for any size selected. - **Band material:** zinc-plated steel - **Compensates for:** hose cold-flow and thermal cycling - **Typical service:** coolant and charge-air hose ## Dimensions & Specifications (Trade series (spring-loaded worm gear clamps)) | Tension element | Band material | Compensates for | Typical service | | --- | --- | --- | --- | | integral belleville spring | zinc-plated steel | hose cold-flow and thermal cycling | coolant and charge-air hose | | integral belleville spring | 304 stainless | hose cold-flow and thermal cycling | engine and industrial coolant | | integral belleville spring | 316 stainless | hose cold-flow and thermal cycling | marine and chemical hose | Inside the plant ## Manufactured in our own plant This part is cold-formed, threaded, heat-treated and finished in-house. The stages below are where its class and finish are actually decided. 1. ![Wire rod feeding into a cold heading machine](https://engineeringhardware.com/wp-content/uploads/2026/08/09-wire-rod-feed-cold-heading-machine.webp) 01 **Cold heading** Wire rod is drawn to size and cold-formed into blanks. Forming rather than cutting keeps the grain flow continuous around the head, which is where a bolt is most likely to fail. Head dimensions and under-head radius checked at set-up and per shift. 2. ![Thread rolling machine producing bolt threads](https://engineeringhardware.com/wp-content/uploads/2026/08/03-thread-rolling-machine-bolt-production.webp) 02 **Thread rolling** Threads are rolled between hardened dies rather than cut. Rolled threads are stronger in fatigue than cut threads and hold pitch and flank angle far more consistently across a batch. Go / no-go ring gauges to ISO 965 tolerance class 6g. 3. ![Baskets of bolts staged for heat treatment](https://engineeringhardware.com/wp-content/uploads/2026/08/05-heat-treatment-baskets-black-bolts.webp) 03 **Heat treatment** Quench-and-temper brings carbon and alloy steel to the property class ordered — 8.8, 10.9 or 12.9 — with the furnace charge tracked so a finished lot can be traced back to it. Core hardness and tensile tested per lot to ISO 898-1. 4. ![Zinc plated bolts in a treatment basket](https://engineeringhardware.com/wp-content/uploads/2026/08/23-zinc-plated-bolts-treatment-basket.webp) 04 **Surface treatment** Zinc, zinc-nickel, hot-dip galvanizing, black oxide, phosphate and Dacromet, selected against the service environment rather than against the price list. Coating thickness and neutral salt spray hours to ISO 9227. ## Frequently Asked Questions ### What are Constant-Tension Worm Gear Hose Clamps used for? Closing a hose, pipe or duct joint by band tension, selected by clamp range rather than by thread size. They are supplied to Trade series (spring-loaded worm gear clamps). ### Which industries use Constant-Tension Worm Gear Hose Clamps? They are commonly specified in general machine building, maintenance & repair (mro) and fabrication & metalwork, among other sectors. ### How do I choose the right size of Constant-Tension Worm Gear Hose Clamps? Match the size to the mating part using the dimension table on this page. ### Are Constant-Tension Worm Gear Hose Clamps made to a recognized standard? Yes — they are manufactured to Trade series (spring-loaded worm gear clamps), so dimensions are interchangeable between suppliers when you quote the standard on your order. ### Can I get a quote for Constant-Tension Worm Gear Hose Clamps in the size and material I need? Yes. Use the technical drawing and quote form on this page to set the size and options, then send the exact configuration to our team for pricing and lead time. ## Related Pages Product page: [Constant-Tension Worm Gear Hose Clamps — specifications & sizes](https://engineeringhardware.com/fastener/constant-tension-worm-gear-hose-clamps/) ### Constant-Tension Worm Gear Hose Clamps Specification Guides ### Related Fastener Applications