Evaluate a 120tph tracked mobile crusher for crushed rock, concrete and construction waste. Key specifications, limits and missing data for quarry owners.
A 120tph tracked mobile crusher is a realistic production target for small to medium-sized quarries and recycling contractors processing crushed rock, concrete or construction waste. The actual throughput you achieve, however, depends on the crusher type, feed characteristics, closed-side setting and screen configuration. This page explains what 120 tph means in practice, which machine configurations are suitable for your material, and the specifications you must provide before selecting a unit.
Rated capacity—whether 120 tph or any other figure—is a nominal value measured under reference conditions. In practice, three variables are the main factors affecting actual output:
For a 120 tph specification, the manufacturer likely assumes medium-hard rock, a 0–50 mm product size, and a continuous feed. If you crush reinforced concrete containing rebar, impact crushers cope well but may reduce throughput due to the risk of jamming. If you process damp construction waste, screens become blocked and output drops. The figure of 120 tph is an engineering estimate, not a guarantee. [FACT CHECK REQUIRED]
Tracked mobile crushers are divided into three main categories. Each has a defined operating envelope for 120 tonnes per hour of processing:
The type of material you are processing determines the type of crusher required. If you are producing road base from limestone, a jaw-and-cone crusher combination works well. If you are crushing demolition concrete to produce recycled aggregate, a single impact crusher is often sufficient.
A tracked crusher can be moved between faces, demolition sites or multiple sites without requiring a transport permit. That mobility is its main advantage. However, if your operation remains in a single pit for years, a semi-mobile (wheeled) or static plant offers a lower cost per tonne for the same 120 tph output. Tracked units come with a higher purchase price and greater hydraulic complexity. For a quarry owner, the trade-off is this: do you need the machine to move every few weeks, or is it a fixed installation?
Tracked units excel in the following situations:
If none of these apply, a static plant with a hopper and conveyor will crush at a rate of 120 tonnes per hour more cost-effectively and with less maintenance downtime.
A 120 tph tracked crusher is not a one-size-fits-all machine. You must specify your feed size distribution and the required product. For a jaw crusher, the feed must fit through the opening without bridging. For an impact crusher, the feed is limited by the rotor diameter and the inlet. Oversized feed reduces throughput significantly and causes blockages.
You should also specify the final product gradation. A 0–20 mm product for an asphalt base requires different settings (and possibly a screen) than a 0–50 mm sub-base. Many tracked crushers feature an independent pre-screen and a return conveyor from the integrated sizing screen. This configuration increases effective output whilst maintaining product specifications.
Tracked crushers are powered by diesel engines (usually 300–400 hp for this class) or an electric drive with a diesel generator. [FACT CHECK REQUIRED] If mains power is available on site, an electric-drive tracked crusher reduces emissions and fuel costs. However, it restricts you to a cable and limits mobility. Diesel offers greater freedom but increases operating costs and noise levels. Consider your local emissions regulations and fuel availability before making a choice.
The climate is also a factor. In cold regions, hydraulic systems require cold-weather kits. In dusty environments, engine air filters and cooling units require extra protection. These are site-specific options that affect uptime.
This class is unsuitable for high-tonnage, continuous production. If you require a consistent output of 400 tph, a tracked 120 tph unit is oversized for that application. You should also avoid it if your material is extremely abrasive (e.g. granite with a high quartz content) unless you use a jaw-impactor combination fitted with heavy-duty wear parts; otherwise, maintenance costs will outweigh the benefits of mobility.
Another limitation: if the moisture content of construction waste exceeds 8–10%, it will clog the pre-screen and reduce throughput to well below 120 tph. A tracked crusher fitted with a high-frequency screen or a wet-processing option is required, but this is a niche configuration.
Before any supplier can provide a quote for a suitable machine, you must provide:
Without these, a figure of 120 tph is merely a starting point for a technical discussion, not a procurement specification.
Tracked mobile crushers are complex—hydraulic drives, tracks and a vibrating feeder all add moving parts compared to a static unit. For a quarry owner, maintenance planning must include daily lubrication points, weekly inspection of wear liners and engine oil analysis. The service life of wear parts (jaw plates, blow bars, impact plates) depends entirely on the abrasiveness of the material. For concrete and limestone, blow bars may last several hundred hours; for granite, their service life drops drastically. [FACT CHECK REQUIRED]
Ask the supplier for the cost of wear parts per tonne, based on your specific type of rock. That figure is more important than the initial purchase price.
The advantage of a tracked unit is that you can move it to a more favourable location within the pit, thereby reducing the distances over which trucks have to travel. This reduces your loading costs and often offsets the higher maintenance costs of the machine itself.
To decide whether a 120tph tracked mobile crusher is the right investment:
If your operation consists of a single long-life quarry with fixed haul routes, a semi-mobile (wheeled) or static plant with a similar throughput is likely to operate at a lower cost per tonne. The tracked crusher is designed to provide flexibility, not to maximise efficiency in a permanent setting.
A 120 tph tracked mobile crusher is a capable machine for medium-sized projects—provided you select the right crusher type for your material, feed size and product specifications. For clean, medium-hard rock and for concrete waste with a controlled feed, an impactor or jaw crusher will achieve a throughput of close to 120 tph. For abrasive, hard rock, use a jaw crusher and be prepared for higher wear costs. For wet, sticky construction waste, avoid this class of machine unless you fit a wash screen.
The crucial step that is often overlooked is submitting your actual material data to the manufacturer. A 120 tph rating is an engineering estimate; the actual figure is derived from testing, not from a brochure. Insist on a test report using your feedstock and your target product before you commit.
