Picking the right excavator rock saw is all about matching the attachment to your machine, the material you're cutting, the depth and width you need, and what your hydraulics can deliver. Go too big, and you'll be fighting stability issues, putting extra wear on the boom, and dealing with sluggish performance. Go too small, and you'll be making extra passes, burning more time, and maybe not even reaching the depth you need. This guide walks you through the key factors for selecting an excavator-mounted hydraulic rock saw for construction, quarrying, mining, demolition, and infrastructure work.
Match the Saw to Your Excavator Class
The first and most important thing to check is your excavator's operating weight and lift capacity. TGEC rock saws are sized for excavators from 6 to 40 tons across five models. The TG-RS60 fits 6 to 9-ton mini excavators with 600 to 1200 mm discs and weighs in at 400 kg. The TG-RS150 is built for 10 to 18-ton machines with 1000 to 1800 mm discs and 600 kg weight. The TG-RS200 and TG-RS200D (double-disc) handle 20 to 27-ton carriers with 2000 to 2600 mm discs and 800 to 1000 kg. The TG-RS300 covers 30 to 40-ton excavators with 2800 to 3600 mm discs and 1000 kg. When you're checking fit, don't just look at the machine's max lift rating—look at what it can actually handle at the working reach and height you'll be using. The attachment weight plus the cutting loads and the disc itself all have to stay within safe limits. Bigger discs create more leverage and cutting resistance, so the effective load at the boom tip is higher than just the static weight of the attachment. If you're routinely working at full reach or making deep cuts, make sure your excavator can safely handle the combined load. And don't forget to consider counterweight—some machines may need extra ballast to run a larger rock saw attachment without getting tippy.
Determine Required Cutting Depth and Disc Diameter
The disc diameter is what sets your maximum cutting depth in a single pass. A good rule of thumb is that max depth is about half the disc diameter, minus the hub and guard. The TG-RS60 with 600 to 1200 mm discs gives you depths up to roughly 300 to 600 mm. The TG-RS150 with 1000 to 1800 mm discs gets you about 500 to 900 mm. The TG-RS200 with 2000 to 2600 mm discs can go down to about 1000 to 1300 mm. And the TG-RS300 with 2800 to 3600 mm discs can cut up to around 1400 to 1800 mm in one pass. When you're figuring out what depth you need, think about whether you really need to get it all in one pass or if you can make multiple passes. In dimension stone quarrying, you usually want a full-depth cut in one go to pull clean blocks. For trenching, road work, and demolition, multiple passes might be fine if the total depth is more than what you can do in one pass. Also keep cutting width in mind—it ranges from 5 to 18 mm depending on the model. Narrower cuts mean less waste and less material to remove, while wider cuts might be necessary for things like expansion joints or finishing trench walls. The TG-RS200D double-disc setup gives you two parallel cut lines at once, which is handy for dimension stone block extraction and any job that needs paired cuts.
Evaluate Material Type and Hardness
The material you're cutting has a big impact on which rock saw you need, what blade you run, and how productive you'll be. Soft stuff like limestone, sandstone, and asphalt cuts fast and lets you push the feed rate. Hard, abrasive materials like granite, basalt, and quartzite require slower feed rates, tougher blade setups, and more frequent segment changes. Reinforced concrete is a mixed bag—the concrete cuts reasonably well, but the rebar throws in intermittent hard impacts that can beat up a blade if it's not built for it. For really hard or highly abrasive materials, you'll want diamond-impregnated segments with the bond hardness matched to how abrasive the material is. Softer bonds work better in hard but non-abrasive rock because they wear faster to expose fresh diamonds, while harder bonds hold up longer in abrasive materials. For softer stuff like general concrete, asphalt, and limestone, carbide-tipped blades can get the job done at a lower cost. When you're selecting a rock saw, think about not just your primary material but also any variability you run into across different jobs. If you work with a wide range of materials, a model that supports multiple blade types and configurations gives you more flexibility. Give your supplier the material specs and they can recommend the right segment type and bond hardness for your applications.
Verify Hydraulic Flow and Pressure
Your rock saw needs an auxiliary hydraulic circuit with enough flow and pressure to drive that high-torque cutting motor. The TG-RS60 and TG-RS150 run at 20 to 25 MPa rated pressure, while the TG-RS200, TG-RS300, and TG-RS200D need 30 MPa. Before you order, double-check that your excavator's auxiliary circuit can deliver the required pressure and enough flow for continuous cutting. If your flow is too low, the blade spins too slowly, cutting efficiency drops, and you risk binding or stalling in hard material. If pressure is insufficient, you won't have the torque to keep the blade turning under load. Also check whether your auxiliary circuit gives you flow and pressure control. Proportional control lets the operator adjust blade speed for different materials and conditions, which is a big plus for optimizing productivity and blade life. If your machine only has a basic on/off auxiliary circuit, the saw runs at full system flow whenever it's engaged—which works, but you lose some control flexibility. Some larger rock saw models might need additional hydraulic valves or cooling tweaks depending on your excavator's circuit setup. For a deeper dive into hydraulic compatibility, see What Hydraulic Requirements Should You Check for an Excavator Rock Saw?. Give your excavator's hydraulic specs to the supplier so they can confirm compatibility and flag any modifications you might need.
Consider Jobsite Conditions and Access
The site you're working on should also factor into your rock saw choice. In tight spots, urban areas, or near existing structures, the lower vibration and noise of a rock saw versus a breaker is a big plus—but you also have to think about the physical size of the attachment and the space you need to maneuver the excavator and position the blade. Bigger discs need more clearance to rotate and swing, which can be a problem in tight demolition or trenching situations. For underwater or submerged cutting, make sure the rock saw and motor are rated for it and that the sealing and cooling are up to spec. If you're working at height or on slopes, double-check that the excavator can be positioned safely and that the attachment weight isn't going to compromise stability. On remote jobsites where maintenance and blade replacement are tough to come by, think about parts availability, blade segments, and service support from the supplier or local dealer. If your work mixes cutting and breaking, consider whether one rock saw can handle all your cutting or if you'd be better off with both a rock saw and a breaker. For more on where rock saws are used, see What Can an Excavator Rock Saw Be Used for on Construction and Quarrying Jobs?.
To review the full product range, visit the excavator rock saws category page or the Excavator Hydraulic Rock Saw product page.
