{"id":3437,"date":"2026-09-29T03:44:21","date_gmt":"2026-09-28T19:44:21","guid":{"rendered":"http:\/\/www.leexpert.com\/blog\/?p=3437"},"modified":"2026-09-29T03:44:21","modified_gmt":"2026-09-28T19:44:21","slug":"can-a-crawler-chassis-be-used-in-underwater-environments-4ad4-51fef2","status":"publish","type":"post","link":"http:\/\/www.leexpert.com\/blog\/2026\/09\/29\/can-a-crawler-chassis-be-used-in-underwater-environments-4ad4-51fef2\/","title":{"rendered":"Can a crawler chassis be used in underwater environments?"},"content":{"rendered":"

Hey everyone, thanks for stopping by the blog! If you\u2019ve spent any time browsing crawler chassis lately (especially if you\u2019re shopping around for reliable ground movement solutions), you\u2019ve probably asked yourself this question at some point: can a crawler chassis even hold up underwater? Crawler Chassis<\/a><\/p>\n

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I get it\u2014when most people think of crawler chassis, they picture heavy construction equipment plowing through mud on land, robots navigating dirt paths in a warehouse, or even toy tracks zooming across your backyard lawn. The idea of submerging those tracks in water, saltwater, or murky underwater muck sounds pretty wild, right? For years, our team here at the crawler chassis supply company got this exact question nonstop. A lot of folks wrote them off straight away, like water and rubber tracks or metal sprockets are just a terrible mix. But after working with dozens of clients over the last few years\u2014from underwater drone builders to aquaculture maintenance crews to coastal search and rescue teams\u2014we\u2019ve learned this isn\u2019t a straight yes or no answer. It\u2019s way more nuanced than that.<\/p>\n

First, let\u2019s break down why people used to think crawler chassis can\u2019t go underwater. Let\u2019s start with the basics: crawler systems rely on a few key parts to work. There\u2019s the track itself (usually rubber for small units, steel for heavy industrial stuff), the sprockets that turn the tracks, the rollers and idlers that keep the tracks tight, and the frame that holds all that together. On land, most of these parts use materials that work great in dirt, oil, dust, and rain\u2014submersion is a whole different beast.<\/p>\n

For steel parts, the big enemy is rust. If you take a standard steel sprocket or roller and dunk it in saltwater, which is way more corrosive than regular freshwater, it\u2019s gonna start pitting within weeks, maybe even days. That\u2019s a huge problem because a crawler only moves if those sprockets can grip the tracks, and if a roller seizes up from rust, the whole thing grinds to a halt. Then there\u2019s rubber tracks. Most standard rubber is made for road or off-road use\u2014some can handle light rain, but prolonged submersion? It breaks down. The rubber gets waterlogged, it loses its grip when it\u2019s wet, and the oils used to keep it flexible leach out, making it crack and fall apart way faster.<\/p>\n

Wait, but that\u2019s the old standard stuff. Our clients don\u2019t want a crawler that works for 10 minutes and dies. They need something that works for hours, days, even weeks underwater, no issues. So what do you change? Let\u2019s talk about the material tweaks that make this possible, because that\u2019s the game-changer here.<\/p>\n

First up, the frame and structural parts. If you\u2019re building an underwater crawler, you can\u2019t use plain steel. We started testing 316 stainless steel a few years back, and let me tell you\u2014this stuff is a game-changer. It\u2019s not 100% rust-proof (nothing is, really) but it\u2019s highly resistant to corrosion in saltwater, freshwater, and even that nasty, sulfur-rich muck you find at the bottom of lakes or bays. We also have a few clients who use coated aluminum frames, for lighter-duty underwater stuff like small inspection robots. Aluminum is way lighter than steel, but you have to get the right anodized coating\u2014regular anodizing wears off fast under constant submersion. The hard-coat anodized we use? It sticks, doesn\u2019t flake, and holds up for years.<\/p>\n

Then there\u2019s the track. Standard rubber is out, but we found two great alternatives that work way better. For lighter units (like the kind used for pipeline inspections in shallow water), we use marine-grade polyurethane tracks. Poly holds up way better in water than rubber\u2014it doesn\u2019t get waterlogged, it resists UV rays if you\u2019re moving around near the surface, and it\u2019s tough enough to handle small rocks or sediment on the underwater floor. For heavy-duty stuff\u2014like crawlers used to pull sensors or dredge small debris from the bottom of a harbor\u2014we use heavy-duty steel tracks, but they\u2019re coated with a special anti-corrosive polymer. We tested those last year in a saltwater test tank for 6 months straight, and there was almost no sign of rust. The coating didn\u2019t even peel.<\/p>\n

Wait, what about all the moving parts inside? The bearings, the shafts, the sprockets\u2014those are the most important bits that make a crawler work smoothly, right? Regular bearings would seize up instantly underwater. So we switched to sealed, grease-packed bearings that are rated for submersion. Not just \u201cwater-resistant\u201d\u2014these are \u201ccan sit at 100 feet underwater for 2 years without needing a regrease\u201d rated. We also use food-grade, non-toxic grease for some of our aquaculture clients, because they don\u2019t want any chemicals leaching into fish tanks or shellfish beds. That was a big request\u2014one client does underwater shellfish population surveys, and they didn\u2019t want their crawler harming the stuff it\u2019s surveying.<\/p>\n

Now, let\u2019s get into real-world use cases, because that\u2019s where the rubber meets the road (pun totally intended). A few years back, we hooked up a custom crawler chassis to an underwater ROV (remotely operated vehicle) for a coastal search and rescue team in Florida. They needed something that could move across the murky, mucky bottom of the Gulf of Mexico, where regular propeller-driven ROVs get stuck in the silt. The crawler chassis we built for them? It can go down 150 feet underwater, runs on lithium-ion batteries that are sealed so no water can get in, and it\u2019s been working nonstop for almost 3 years now. They use it to search for lost fishing gear, boat parts, and even personal items like phones or wallets that people drop overboard. The team says it\u2019s way more reliable than their old propeller ROVs\u2014they haven\u2019t had to replace a track or a bearing in that time.<\/p>\n

Another client is an aquaculture farm in Norway. They have salmon pens that need to be cleaned every few weeks, and the algae and barnacles growing on the pen nets are a nightmare. Their old crawler (land-based, obviously) wouldn\u2019t work when they had to wade into the shallow water around the pens, so they came to us for a submersion-rated chassis. We built them a small, lightweight unit with polyurethane tracks, aluminum frame, and sealed motors. It\u2019s used in 10 feet of saltwater, moves along the pen nets, and sprays a mild, non-toxic solution to kill algae. They told us it cut their cleaning time in half, and they haven\u2019t had to do any repairs on the chassis since we delivered it two years ago. That\u2019s huge for them\u2014time is money when you\u2019re running a farm.<\/p>\n

Wait, but it\u2019s not all smooth sailing, right? There are still limitations, and I don\u2019t want to sell anyone something that won\u2019t work for their needs. First, depth. Most of our submersion-rated crawlers are rated up to about 300 feet. If you need something for deep sea\u2014like 10,000 feet, where submersibles go\u2014we don\u2019t have that yet. The pressure at that depth is insane, and even our stainless steel parts can get crushed if they\u2019re not reinforced for high pressure. That\u2019s a whole different engineering problem, and we\u2019re still working on it, but right now our stuff is for shallow to medium-depth underwater work.<\/p>\n

Then there\u2019s power. If you\u2019re running a crawler underwater, you can\u2019t plug it in easily\u2014so it needs batteries. We use high-density lithium-ion batteries that are completely sealed, no vents, no exposed wires. But keep in mind, the deeper you go, the more pressure you put on the battery seals. We test every single unit we build at our workshop before it goes out, submerging it in a test tank for 72 hours straight to make sure no water gets in. But even with that, if someone\u2019s using the crawler in super cold water (like near the Arctic, or glacial lakes), we have to adjust the battery type. Regular lithium-ion dies fast in freezing temps, so we use lithium-iron phosphate batteries that hold up in cold.<\/p>\n

Another big thing: traction. Underwater, there\u2019s less friction between the track and the ground than there is on land. Silt, clay, small rocks\u2014those all make it hard for tracks to grip. That\u2019s why we design our underwater tracks with a deeper tread pattern, similar to the treads on a heavy-duty construction track, but modified so they don\u2019t trap as much sediment. We also do custom tread designs for clients who work in super mucky areas\u2014one client in the Pacific Northwest works in muddy riverbeds, and we built them a track with open slots that let silt fall out instead of getting stuck, so they don\u2019t slip all the time.<\/p>\n

I think a lot of people also worry about maintenance, right? If you\u2019re running something underwater, cleaning it after every use is a big job. But our crawlers are actually pretty low-maintenance. The sealed parts mean you don\u2019t have to regrease bearings every month\u2014you just rinse the whole chassis off with freshwater after use to get rid of salt or sediment, and that\u2019s it. For heavy-duty units that work a lot, we recommend a once-a-year inspection to check the polymer coating on the steel parts, but that\u2019s way less work than maintaining a standard underwater vehicle.<\/p>\n

Wait, let\u2019s address the elephant in the room: cost. Submersion-rated crawlers aren\u2019t cheap. The materials\u2014316 stainless, hard-anodized aluminum, sealed bearings, marine-grade tracks\u2014are way more expensive than standard off-the-shelf parts. But when you compare it to the cost of replacing a whole underwater ROV every year, or losing days of work because your unit breaks down, it\u2019s worth it. Our clients tell us that within 6 months of using our crawler, they\u2019ve made back the extra cost in saved time and repairs.<\/p>\n

We also get a lot of people asking about saltwater vs freshwater. Is one easier than the other? Freshwater is way less corrosive, so a crawler built for freshwater use will last longer than one built for saltwater. But we can customize any unit for either, or even for areas where you switch between both, like coastal areas that have both rivers and the ocean.<\/p>\n

Let\u2019s wrap this up with the big takeaway, because I know you\u2019re here for a clear answer. Can a crawler chassis be used in underwater environments? Hell yeah, it can\u2014if you build it right. It\u2019s not a one-size-fits-all solution, and it\u2019s not for super deep sea work, but for shallow to medium depths, for tasks like pipeline inspection, aquaculture maintenance, search and rescue, underwater construction, even scientific research, a properly built submersion-rated crawler chassis is way more reliable than a propeller-driven underwater vehicle. It can handle muck, rocks, uneven terrain that propellers get stuck in, and it\u2019s easier to control for straight-line work or climbing gentle slopes underwater.<\/p>\n

If you\u2019re someone who\u2019s been searching for a ground vehicle for underwater work, don\u2019t write off crawler chassis just because your first thought was a standard construction track. Talk to us\u2014we\u2019ve worked with every kind of client, from small startups building underwater robots to large industrial companies with teams of engineers. We can walk you through what parts work for your specific needs, what depth you\u2019re working at, what kind of water (fresh vs salt vs mucky river) you\u2019re dealing with, and build a custom crawler chassis that fits exactly what you need. No generic stuff, no overpaying for parts you don\u2019t need.<\/p>\n

If you\u2019re tired of ROVs getting stuck in the silt, or propellers breaking on every rock, or units seizing up after a few weeks of submersion, hit us up. We\u2019re here to help you find the right solution, and we\u2019ve got decades of experience building crawler chassis for every environment, including underwater. Don\u2019t let anyone tell you crawlers can\u2019t go underwater\u2014we\u2019re living proof they can, and they work really well when built right.<\/p>\n

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Thanks again for reading, and feel free to reach out for more info anytime.<\/p>\n

Tracked Drill Rig Chassis<\/a> References<\/p>\n

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  1. ISO 12944: Corrosion Protection of Steel Structures by Protective Paint Systems<\/li>\n
  2. Society of Automotive Engineers (SAE) J1926: Sealed Bearings for Submersible Applications<\/li>\n
  3. National Oceanic and Atmospheric Administration (NOAA): Coastal Underwater Vehicle Terrain Compatibility<\/li>\n<\/ol>\n
    \n

    Murphy Construction Machinery (Shandong) Co., Ltd.<\/a>
    Murphy Construction Machinery (Shandong) Co., Ltd. is one of the most professional crawler chassis manufacturers and suppliers in China, also supports customized service with low price. Please feel free to buy CE approved crawler chassis made in China here from our factory. For pricelist, contact us now.
    Address: Room A3, Zone E, Yangqiao Industrial Park, Liuxing Street, High Tech Zone, Jining City, Shandong Province
    E-mail: mefgcjx@126.com
    WebSite:     https:\/\/www.mefjx.com\/<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

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