Mini excavators are one of the quickest growing equipment types, with the machine’s popularity seemingly ever-increasing. According to data from Off-Highway Research, global sales for the mini excavator were at their highest point ever last year, at over 300,000 units.
The major markets for mini excavators have traditionally been developed countries, such as Japan and those in Western Europe, but the last decade has seen their popularity rise in many emerging economies. Most notable of these is China, which is now by far the biggest mini excavator market in the world.
Considering that mini excavators essentially replace manual labour, this is perhaps a surprising turnaround in the most populous country in the world where there is certainly no shortage of workers. Although all is perhaps not as it seems in the Chinese market – see the box out ‘China and mini excavators’ for more details.
One of the reasons for the mini excavator’s popularity is that it is easier to power a smaller and more compact machine with electricity rather than the traditional diesel power. It is the case that, especially in city centres of developed economies, there are often strict regulations regarding noise and emissions pollution.
There is no shortage of OEMs that are currently working on, or have released electric mini excavators – back in January 2019 Volvo Construction Equipment (Volvo CE) announced that, by mid-2020, it will begin to launch a range of electric compact excavators (EC15 to EC27) and wheeled loaders (L20 to L28) and stop new diesel engine-based development of these models.
Another OEM looking at electric power for this equipment segment is JCB, with the company’s 19C-1E electric mini excavators. The JCB 19C-1E is powered by four lithium-ion batteries, providing 20kWh of energy storage. This is enough for a full working shift for the majority of mini excavator customers on a single charge. The 19C-1E itself is a powerful, compact model with zero exhaust emissions at point of use and one that is considerably quieter than a standard machine.
Small machine is a relatively light and fast mechanical equipment. Like hand-held power tools, concrete vibrator, frog tamper, mini transporter, woodworking machinery, steel machinery, mini dumper, motorized dump truck, welding, etc. are all small machines.
In addition to large machinery and equipment in construction should pay attention to the safe use, to prevent injury, a variety of medium and small machines also have different degrees of danger, must be used in accordance with the safety requirements.
Going electric
JCB recently sold two models to London-based J Coffey Plant, with Coffey Plant Division Operations Manager Tim Rayner commenting, “The major benefit is no emissions at point of use. Our workers are not subjected to diesel emissions when using the 19C-1E. Confined areas are now clearer and safer to work in too, as there is no longer a need for emissions control equipment such as extraction units and ducting. The JCB electric minis bring value to the business and the industry as a whole.”
Another OEM looking at electric power is Kubota. “In recent years mini excavators powered by alternative fuel sources – such as electric – have seen a surge in popularity,” says Glen Hampson, business development manager construction at Kubota UK.
“The main driver behind this is that electric equipment gives the operator the ability to work in regulated low emission zones. Electric machinery can also enable work to be carried out in confined spaces underground without producing harmful emissions. It’s reduced noise output also makes it great for construction work in urban or heavily populated environments.”
Kubota launched a prototype electric compact mini excavator in Kyoto City, Japan, at the start of the year and Hampson adds, “At Kubota, our main priority will always be the development of machines that match the needs of our customers – the development of electric machines will allow us to do just this.”
Bobcat recently announced that it was launching a new R-Series mini excavators from 2-4 tonne with a new range of five compact excavator models: the E26, E27z, E27, E34 and E35z. One of the standout features for this range is said by the company to be the Cylinder-Inside-Boom (CIB) design concept.
According to Miroslav Konas, product manager, Bobcat Excavators Europe, Middle East and Africa (EMEA), “The CIB system aims to overcome what has been one of the weakest points in any mini-excavator – the vulnerability of the boom cylinder to damage such as that caused by colliding with the sides of trucks and other vehicles when loading waste and building materials.
“It does this by enclosing the hydraulic cylinder inside an extended boom structure, thus avoiding collisions with the top of the blade and the sides of vehicles. In fact, the boom structure protects the hydraulic boom cylinder in any position of its movement.”
Wood chipper is a kind of special equipment for producing wood chips, wood chipper is also called wood slicer, which is one of the wood processing series equipment.
Trenching machine, such as mini trencher, is one of the main types of construction machinery, a kind of trenching machinery used in earthwork construction, widely used in agricultural water conservancy construction, laying of communication cables and petroleum pipelines, municipal construction and military engineering, etc.
Useful tools and machines in home agriculture also include log splitter, stump grinder, etc.
Operator comfort
With the lack of skilled operators in the industry, keeping those behind the stick happy has never been more important. Volvo CE claim that the new 6-tonne ECR58 F generation compact excavator has the most spacious cab in the industry.
Operator well-being, confidence, and safety are supported through a simplified workstation and user-friendly experience. The seat-to-joystick position has been revised and improved, while still being suspended together – a technic that Volvo CE says it introduced to the industry.
Designed to offer the highest levels of operator convenience, the cab features soundproofing, numerous storage areas, and 12V and USB ports. A fully opening front window and slide side window contribute to all-around visibility and operators have an automotive style jog wheel, five inch colour display and easy-to-navigate menus.
Operator comfort is indeed important, but another reason for the general popularity of the mini excavator segment is the ever-increasing range of attachments on offer. For instance, Volvo CE’s ECR58 has a wide range of attachments which are easy to switch over, including buckets, breakers, thumbs, and the new Tilt Quick Coupler.
Talking about the mini excavator’s rise in popularity, Chris Sleight, managing director, Off-Highways Research, highlights attachments, saying, “At the lighter end, the range of attachments available mean it [a mini excavator] is often favoured over workers using hand-held air-powered tools. This is partly because this can be helpful in reducing workers’ exposure to noise and vibration, and also because it removes the worker from the immediate vicinity of the tool.”