Mini Excavator Small Digger

The Derette RT18 zero‑tail mini excavator is built to handle heavy‑duty digging tasks within a compact footprint. This 1.8‑ton unit integrates premium international core components, rugged high‑strength steel framework and smart thermal management hardware. It delivers consistent output across rocky ground, clay soil, dusty construction zones and low‑temperature job‑sites. Suited for tough utility, demolition and landscaping assignments, the RT18 stands out for stable multi‑action response, long‑term mechanical durability and broad attachment compatibility for rental fleets and professional contractors.

Product Advantages

1. Robust Power Unit for All‑Climate Operation

Fitted with proven Kubota D902 liquid‑cooled diesel powerplant. The power unit is fine‑tuned for reliable cold‑weather startup and stable output under high‑temperature working conditions. Built‑in water‑separator hardware shields fuel injectors from impurities, maintaining steady power supply even on remote off‑grid sites. Long service intervals help cut routine maintenance workload for machine owners.

2. Optimised Hydraulic Assembly with Fine‑Tuned Control

Adopting well‑known international hydraulic pump and motor assemblies, the hydraulic circuit dynamically adjusts oil flow against actual digging resistance. It generates ample breakout force for hard‑soil excavation while keeping movement soft and controllable for fine grading jobs. Pilot joysticks grant delicate metering control, so operators can finish precision tasks without jerky machine movements. Internal valve body machining minimises oil leakage and sustains boom holding performance under load.

3. Heavy‑Duty Steel Structure & Reinforced Chassis

Main boom and arm assemblies adopt Q355B high‑strength steel and automated robotic welding for solid joint penetration. Pivot points use induction‑hardened pins plus replaceable forged steel bushings to mitigate wear from frequent cyclic work. The X‑shaped undercarriage frame boosts overall rigidity. Sealed track rollers reduce grease refilling frequency and extend service life on abrasive, debris‑filled work zones.

4. Effective Heat Dissipation & Slope‑Adapted Travel Performance

Side‑by‑side radiator and hydraulic oil cooler setup keeps engine coolant and hydraulic fluid within safe temperature ranges during continuous high‑cycle work. A debris‑proof outer screen blocks dust and rubble, simplifying daily cleaning work. The swing motor includes built‑in auto‑brake to prevent boom drift when working on inclined ground. Two‑speed planetary travel drives deliver strong climbing capacity for slopes up to 35 degrees.

5. Versatile Attachment Interface & On‑Site Safety

Zero‑tail swing avoids wall collision in confined yards and basement workspaces. Quick‑coupler interface supports fast swap for buckets, breakers and augers. The machine satisfies ROPS/FOPS safety standards for roll‑over and falling‑object protection. Multi‑language warning decals help local operators follow safety protocols across global job‑sites.

Technical Parameters

Product Applications

Heavy‑Duty Excavation Work

Handles digging jobs in compacted earth, stiff clay and scattered rock terrain. Delivers reliable breakout power for site preparation and foundation trenching projects.

Demolition & Breaking Assignments

Pair with hydraulic breaker for concrete slab dismantling, pavement removal and partial building demolition. Zero‑tail layout lowers collision risk when operating close to existing structures.

Quarry & Material Sorting Tasks

Carries out stone sorting, aggregate stacking and short‑distance material loading in small quarry zones. Solid chassis stands up against sharp rock debris.

Road & Municipal Construction

Performs precision ground grading, sub‑base levelling and utility trenching for rural and urban road projects. Retractable tracks allow entry into narrow roadside work zones.

Equipment Rental‑Fleet Deployment

High component durability and wide attachment compatibility create stable returns for rental operators. International certification supports bidding for public municipal projects.

Shipping

Container‑Optimised Packing

RT18 dimensions are optimised for standard 20ft /40ft sea containers without complex disassembly. Every machine is rigidly secured inside container frames to absorb vibration during long‑distance ocean transit.

Production Lead‑time

Standard configuration: 15‑25 working days upon receiving customer deposit. Custom‑ordered cabins or special tool packages extend manufacturing time accordingly.

Trade Cooperation Options

FOB, CIF and DAP trade terms are available. Volume‑oriented price discounts, mixed‑container loading and OEM custom marking can be arranged for bulk distributors.

Pre‑shipment Functional Check

Each RT18 completes full operational testing covering digging, travel and auxiliary hydraulic circuits. Inspection photos and video materials are sent for buyer confirmation before container loading.