Tilt & rotate coupler is a great innovation that allows a contractor to complete excavation work 30–40% faster, work in confined areas and also use a bigger machine. Tilt & Rotate coupler also helps in change of attachments in 10 seconds!! Add twist, flexibility & efficiency to your excavator & backhoe loader

 

Increasing productivity is always the main criteria when purchasing equipment or attachments. Tilt & Rotate coupler has been popular for decades with great success in Europe & North America, just for that reason.

Allowing an excavator operator to tilt and twirl any attachment 360 degrees, the tiltrotator delivers…

Kaiser Spider excavator is able to roll or ‘walk’ on steep terrain up to 85% slopes without winching and steeper slopes when tied off with the integrated winch. Dual fuel tanks allow the excavator to work for 4 days between refueling, which is important when working on remote, steep or environmentally sensitive sites. The telescopic extending boom provides long reach which reduces the number of times the machine must move thereby saves time & reduces ground disturbance.

Kaiser Spider excavator can work in water up to 2m depth and can do a whole lot more when mounted with following Attachments: 

Buying excavators, backhoe loaders, road equipment and attachments and keeping them operational can be costly. Usually, the largest capital expense for a project is the equipment. Procurement managers are supposed to study the initial investment, operation cost and calculate a return on investment. However, concept of Total Cost of Ownership is still alien to the Indian context.

Understanding the total cost of ownership (TCO) for each equipment or asset class is essential to making sound, data-driven procurement decisions that will positively impact your bottom line. These decisions include what brand to purchase,  purchase new or used, operational costs over the…

If you want to increase the returns on your backhoe loader, investing in attachments is what you must consider. Attachments allow your machine to do more by accomplishing more tasks on a jobsite with one machine or by taking on jobs across multiple industries. Here are five attachments beyond the standard bucket that can increase the RoI of your machine. 

Using a backhoe to cut a trench is an efficient alternative for jobsites requiring cutting a trench for laying cables or pipes instead of using a separate trenching equipment or doing it manually.  Having a trencher attachment increases jobsite…

Suretech is known for their expertise in specialty attachments for excavators, Backhoes and Skid Steers and they have built up a trusted name over more than three decades. 

The Dr.Digger stump grinder attachment mounted on a Digga Auger Drive makes stump removal work much more efficient and up to 10 times faster than traditional stump grinding options. 

Dr.Diggers' Stump Grinder drills through stumps and roots to almost 500mm deep into the ground. The ground remains of chipped wood can be used as fertilizer and there is no need for additional clean-up on logging and land clearing sites. Once the work…

Who could have imagined that 29th June, 2007 would go down in history! Steve Jobs launched the iPhone and changed the way people would use their smart phones for times to come. A year later Elon Musk did the same with electric cars. No one could have imagined that EV's would take over the world. Today,  Tesla is making 500,000 cars a year and is valued higher than the top six car manufacturers combined.

Steve Jobs & Elon Musk have caused disruption in their respective industries like no other. When will construction equipment industry get their own Steve Jobs? Just…

LOY Yang A has developed an innovative way to improve work and safety at the power station ash ponds with the help of a 65-tonne floating excavator officially named “Arthur”.

The Caterpillar 336 excavator has been the result of a four-year problem-solving exercise to find equipment capable of operating on the ash pond soft surface.

AGL chief operating officer Markus Brokhof said the excavator would be a huge benefit for Loy Yang workers.

Mr Brokhof said Arthur was named after a long serving RTL…

A perfect combination of an excavator and a wheel loader in one machine, Mahindra SX Smart backhoe loader highly capable of digging, lifting, carrying, breaking and lots of other using various attachments. With its ability to tackle all those tasks, you just cannot ignore Mahindra SX Smart

“Mahindra SX Smart are great multi-purpose earthmoving machines,” according to Anwar Ali of Jilani Earthmovers. “They are best suited for any project that needs power and speed. “We use Mahindra backhoe loaders for digging ditches and trenches, backfilling, lifting heavy materials and moving loose material” adds Anwar Ali. Mahindra SX Smart backhoe loaders…

An auger cast pile is a most popular method to create a foundation for solar panels. Auger cast piles are installed by drilling a hollow shaft auger into the soil to the specified depth. As the auger is slowly extracted, drilled soil and rock is removed and concrete or grout is pumped through the hollow shaft. Reinforcing steel is then added to the wet concrete according to the pile specifications. Auger cast piles are both end bearing and friction based. 

Auger cast piles are best suited to areas which have clay, gravel, dense sand and low water tables, where the…

Designed to be mounted on excavators, RWE series Wheel saws are designed for precise cuts on hard and compact surfaces, such as asphalt, concrete and rock. Two high-displacement radial piston motors on the largest model RWE100, in direct drive guarantee a high torque and maximum cutting force. ​Ideal for cut and break demolitions, optical fibre installations and underwater works upto a depth of 30 meters.

To help power and fiber-optic cable contractors reliably and efficiently use micro-trenching for cable installation, Simex has introduced the RWE series of Wheel saws.  With the RWE Wheel saws, operators can…

 

Digga Australia is a leading manufacturer of a wide range of attachments for the earthmoving, construction, forestry & agricultural industries. Digga’s has been continuously logging YoY huge growth with robust demand for their trenchers, augers, sweepers and other attachments suitable for machines such as excavators, skid steers, backhoes and telehandlers. 

 

Digga Auger drives, their highest selling product, can be used to drill holes with diameters ranging from 150mm to 2000mm upto a maximum depth of  around 18 metres. This however is subject to the reach of the excavator it is mounted…

Shanghai Construction Group is involved in urban improvement works: infrastructures, construction, industrial plants and underground utilities. They used a Simex TF 850 double-drum cutter head within excavation works for laying underground drainage pipes along Shanghai subway.

Shanghai is a densely populated city and construction companies are looking for new excavation methods as alternative to traditional ones like the hydraulic breaker which is very noisy and causes huge vibrations, to the detriment of the surrounding residents. High frequency vibrations caused by hydraulic breakers may also lead to asphalt cracks and…

VTN handling grapples can be extremely useful for any job- site. One grapple that can be fitted with 5 different jaws to facilitate smooth, efficient and better working.  

Thanks to their particularly solid design and different available jaws shape, the VTN MD series Grapple is well suited for various different handling applications on the job site. These grapples are extremely effective for sorting and loading a variety of different materials.

 

With the considerable gripping force and above all the 360° hydraulic rotation, these grapples can be used in the most precarious conditions, ensuring greater productivity without requiring…

co-authored by Ajit Dabke, GM, Technical, Suretech

Auger Drives are among the most common and productive attachments used in the construction industry. As with most types of construction equipment, proper maintenance is essential to ensure peak performance and safety. Various auger tools are available for drilling in soft to harder ground conditions, such as rock, clay, concrete, asphalt and more. When repairing or servicing the auger, remember to use only parts that meet the OEM standards and requirements.

·      Make sure that all nuts and bolts are in place and properly tightened and are performing their specified function.

·…

Soil Stabilization is the alteration of soils to enhance their physical properties. Stabilization can increase the shear strength of a soil and/or control the shrink-swell properties of a soil, thus improving the load bearing capacity of a sub-grade to support pavements and foundations.

 

Soil Stabilization can be utilized on roadways, parking areas, site development projects, airports and many other situations where sub-soils are not suitable for construction. Stabilization can be used to treat a wide range of sub-grade materials, varying from expansive clays to granular materials. This process is accomplished using a wide variety of additives, including lime, fly-ash, and…

Power of an Auger drive is a combination of speed and torque. You need a lower torque and higher speed when drilling in soft soil and a high torque and low speed when digging in a hard soil. Auger drives generally come with a single speed / torque configuration, which can however be changed controlling the oil flow to the drive. This is easier said than done and may take a while and a flow meter to carry out the adjustment. 

 

Working with multiple sized auger bits or often in different ground conditions can increase the expense and waste of…

Limited availability of fresh natural aggregate supplies with increasing processing costs have led to use various reclaimed/recycled materials from old roads as a source of road construction material.  Use of recycled materials for building roads, pavements, footpaths is increasing all over the world due to their cost effectiveness and environmentally sustainable aspects. Recycled Asphalt, stabilised with cement binders has been reported to perform satisfactorily in sub-base layers.

Asphalt Recycling Process

Asphalt is reclaimed when an existing hot mixed asphalt (HMA) layer is removed for reconstruction or resurfacing. The two methods generally used for reclamation are (i) cold milling and (ii)…

Around the mountains of the Swiss Alpine Club (SAC) there are mountain construction sites with special demands on people and materials. How do such projects succeed?

On construction sites in the Alpine region, it is part of everyday life that unforeseen difficulties arise. Heavy rain, snow, falling rocks. Weather influences and the topographical location make it necessary to plan construction phases with a foresight. It is important to optimally design the construction program for the short construction period in summer and to synchronize all project steps in order to be able to implement them promptly. But even with experienced planners…

Simex is celebrating 30 years since the attachment manufacturer first started its assembly lines. 

Simex was founded in 1991 in San Giovanni in Persiceto, Italy. Since its creation, Simex has continued to develop new attachments suitable for various fields of application. Today, the company holds dozens of patents applicable to roadworks, infrastructure and utilities, as well as demolition, construction and quarrying.

From its first assembly lines, which allowed the company to tackle the majority of its processing in-house, to the new headquarters in 2003, Simex has continued to grow.  Production facilities have expanded in order to accommodate a wider product…

Cleaning is very necessary for all construction equipment. Clean equipment lasts longer and protects your investment. Cleaning heavy equipment is an underappreciated chore. It’s messy and often delegated to an unskilled worker who sees this job as just hosing down dirty machinery. Well, there’s far more to effectively and efficiently cleaning construction equipment than meets the eye.

Heavy equipment washing requires specialized equipment like high pressure washers. And then there’s the safety factor to consider. Heavy construction equipment like excavators, loaders and gravel trucks are large, complicated machines presenting hazards to operators and those tasked to clean them on a…

Trencher attachments are the perfect tools for cutting through the soil, asphalt or concrete with precision and ease. They help everyone from contractors and landscapers to maintenance crews and municipalities in digging narrow trenches from 100-300mm, for installing irrigation systems, power and water lines and even performing road repairs or general construction tasks. Trencher attachments can be used on backhoe loaders, mini excavators, hydrostatic compact loaders and skid steer loaders. 

Trenchers are very useful for digging trenches for utilities such as irrigation, plumbing and electrical, as well as for foundations in construction. Some of…

Excavators are the most versatile construction equipment and can be adapted for use in various sites, jobs & applications. One of the major handicap a contractor faces is when he finds that his excavator is just falling short of reach required to do a job. Addressing this need, several manufacturers have developed various types of reach extenders for various different applications and situations. Below are some of the popular reach extenders:

Long Reach attachment: Long reach is the most popular reach extender and is now also offered as a factory fitted option by almost all the…

Kaiser AG ranks amongst the world’s leading manufacturers of mobile walking excavators today. The first prototype was produced in 1965.

In the mid-1960s, Josef Kaiser developed a special excavator for deployment in steep terrain. This was a “single-axle” excavator, later to become known as a “walking excavator”. The defining feature of this type of excavator was the absence of a separate travel drive. Instead, the vehicle propelled itself forwards using the boom and bucket as its front foot.

This was nothing new. Similar models were already on the…

Mini excavators in India have been undergoing robust growth. From an industry size of around 500+ in 2014, it has now grown to around 1400 units a year. The annual growth rate has been around 15% and is now expected to jump up to 25%

Major demand of mini excavators comes from agriculture, plantation, waterways construction and general construction segment. Kerala has pioneered the mini excavator revolution which can be seen from a very good demand in agriculture and plantation segment. Hilly terrains also play a key role in customers adopting mini excavators. 

Besides this, the government focus on the…

The effect of adverse weather on the road is a major problem that deserves increased attention and organized efforts to reduce its impact. Choosing the right machine, therefore, becomes very important.

Routine road maintenance can save you a lot of money. Monsoons elevate the need for proper road repairs. Regular maintenance is the key to preserving strength and quality of the road. Repairs need to be systematically carried with the right equipment. The selection of the right road repair equipment is pivotal to an economical and lasting repair

Simex Cold milling planer is the answer: Due to the finite nature…

Though many associate the first backhoes with Case Construction Equipment and JCB, a new book gives the credit to two men in Hubbardston, Massachusetts, with developing the world’s first backhoe.

The authors of “Wain-Roy and the Invention of the Backhoe” attribute the revolutionary construction equipment’s creation to Vaino J. Holopainen and Roy E. Handy Jr. Their 1947 invention “could dig and load by swinging side to side” and was “the world’s first all hydraulically actuated and controlled machine for digging,” according to a news release from authors…

Before you buy any equipment, you need to consider investment, resources, net profit, break even etc. Any business needs a proper planning so that all the pitfalls can be checked and setbacks are avoided

 

Backhoe loaders comes with a running cost with them. If running cost of any machine is not taken care of, than the contractor should be ready for surprises. The cost of running a backhoe loader can be termed as “Total Cost of Ownership”. Total cost of ownership can be divided into four major factors which…

Kaiser AG based in Schaanwald is a typical Liechtenstein company. Thanks to its capacity to innovate, the company has developed from its beginnings as a small workshop to become a niche player on the world market for mobile walking excavatorsand sewer cleaning vehicles.

The mobile walking excavator is not an excavator in the conventional sense of the word. Its strengths come into their own in areas where others are unable to compete. Whether deployed on steep slopes in Alpine regions, in an…

Excavators have traditionally been used only for excavations and digging in India while it used as a multi-purpose tool all over the globe. Customers have been quite inflexible in their thinking and resist using the excavators for anything other than digging and rock breaking. However, ever reducing margins have compelled them to look at better utilization of their equipment. Another reason for a change of heart could be immense success of QUICKCOUPLERS which enable change of attachments in minutes instead of hours, very easily and efficiently.

We have brought into India several attachments for increasing productivity and profitability of our…

Simex offers Planers that are ideal tools for minor road repairs and maintenance. In order to establish its footprint in the Indian market, the company has chosen Suretech Infrastructure Pvt Ltd as its partner

India as a potential market

Italian firm Simex s.r.l. was established more than 20 years ago and today it is one of the leaders in the world for cold planer machines. The company believes that Indian market has got a very huge potential, but it needs to be pushed to create a kind of knowledge and culture.

“Simex, being a manufacturer with a progressive technology, niche…

COSBEN was founded in 1976 and company has since become an international leader in the Teledipper arms and other equipment that it makes.COSBEN’s strong points are their untiring commitment,innovative capacity and the inpaccable quality of their products. Today COSBEN is supported by numerous dealers around the world,operating both on the European market and in many areas beyond, including Latin America,the USA,and Asia. The company’s personnel conduct constant market research to ensure increasingly successful sales, so much so that “COSBEN” has become a byword for quality and reliability .All COSBEN attachments are made in extremely high strength steel. Each production stage…

 

Excavators are described as “a power driven machine for digging, moving, or transporting loose gravel,sand, or soil” yet they are so much more than that. Excavators can be used to dig holes, install screw piles,trench, slash grass and mulch trees.

Digga Australia is helping to change the way excavators are perceived and used with the release of drilling attachments designed to expand the earning capabilities of excavator owners. “Increasing the versatility of machines opens new opportunities foroperators,” “The more jobs they can do the more money they can earn for the owner,” he continued.

Instead of just moving digging, operators…

I have been selling construction equipment for last 27 years and have seen the evolution of the industry over the years. Whereas the products, quality, competition have all improved, the attitude of the sales people have gone hurtling downhill. It is difficult to say where this change came about? Was it being driven by the manufacturing companies, degradation in education and values inculcated by the peer group or simply the need to get ahead at whatever the cost.

The professional ethics and healthy respect for each other though are still visible in the developed world, it sadly has just disappeared…

Negotiations have been practiced ever since the advent of humanity. Spouse negotiates to get that something extra, a child negotiates with parents to get a toy or a sweet. Relationships have always thrived on negotiations and compromise.

Negotiation evolved as an art and is being taught as a skill in the corporate world to extract that something extra, an additional benefit for yourself. Though negotiations are supposed to be a win win for all stakeholders involved, it is seldom so in practice. Ever mounting performance yardsticks and greed to get more has reduced negotiations to being a mere tool of…

A Simex VSE 40 screening bucket is delivering successful results in Siberia on the “Power of Siberia” gas pipeline, which will transport Russian gas into China.

“Power of Siberia” is the natural gas pipeline constructed and managed by Gazprom (the Russian energy giant performing extraction and distribution of petroleum products) which will bring the gas of Sakha Yakutia, a region of Eastern Russia, all the way to China. When completed, the pipeline will enable 38 billion cu m to be supplied each year. By the end of 2018, a 2220 km section will be finished, serving to transport…

The undercarriage of tracked heavy equipment, such as crawler excavators, consists of many moving components that need to be maintained regularly. If the undercarriage is not routinely inspected and cleaned, it can cost you heavily in breakdowns, reduced undercarriage life and above all, considerable amount of money

By following the tips given below you can get better performance and better life out of excavator’s track undercarriage:

At the end of each workday, excavator operators should take time to clean out dirt and other debris that may lead to undercarriage muck buildup. Shovels and pressure…

VTN Tilt & rotate coupler is a great innovation that allows a contractor to complete excavation work 30–40% faster, work in confined areas and also use a bigger machine. Tilt & Rotate coupler also helps in change of attachments in 10 seconds!!

The VTN Tilt-rotator is a hydraulic coupler mounted on an excavator and it allows the bucket or any attachment to be rotated 60 degrees and tilt 5 degrees to each side. A reason for increase in pro­ductivity is easy manoeuvrability into tighter areas and working precisely or for creating slopes any­ where from one to 45 percent. Earlier…

Backhoe loaders — this machine has been the superstar of construction equipment as well as the material handling industry since quite a long time. Ever thought what makes the backhoe loader so popular? It is its versatility! In an era when Indian equipment manufacturers are designing machines to do as many jobs as possible or trying to follow the ‘Swiss-army-knife’ approach, the backhoe loaders with its versatility are winning hearts. The machine is at once a dedicated trenching unit as well as a front-end loading tool.

Be it building sites, roadwork areas or places where earth-moving is required, backhoe…

Langjökull (Icelandic for “long glacier) measures 953 sq. km, 50 km in length and 15–20 km in width, and is the second largest in Iceland, smaller only than the colossal Vatnajökull.Situated some 200 km northeast of Reykjavik and at an altitude of 1,450 m, the glacier has a maximum thickness of about 580 m and extends over a large system of volcanoes Because this natural phenomenon is so unique and is relatively difficult to reach from the part exposed to the southwest, Langjökull has long been a destination for hikers from all over the world.

In 2010, Baldvin Einarsson and…

Equipment failure can cost you thousands of rupees every day that they’re under breakdown. That’s why it’s important to have a construction equipment maintenance as per schedule. Prioritizing equipment maintenance can prevent larger costs in the future.

The biggest reason to conduct scheduled maintenance is that it controls costs. Well maintained vehicles and equipment minimize repair and downtime costs. Timely maintenance allow you to know ahead of time if something needs to be replaced before it becomes an issue. Regular maintenance also helps to lengthen equipment life, and control service intervals. With that in mind, it’s important to plan how…

If you are a fleet owner, you will be having different operators with different skill levels, operating your equipment. Equipment operated by one operator could be witnessing more breakdowns than others. Of course, this could be due to equipment fault as well, but if this operator works on another equipment and even that starts breaking down, then you have to work on this operator.

The operator running the machine can significantly impact your total cost of ownership. That means deciding to invest in operator training should be as simple a the decision as to purchase a superior machine. Here are…

Skid Steers are gaining popularity in India but so are Compact Hydrostatic Loaders. Considering the Indian conditions and the various applications the contractors put their machines to, we need to understand and evaluate the utility of both equipment. Here we compare an entry level skid steer loader with Eimco Elecon AL120 Compact Hydrostatic Loader

An entry level SSL has a bucket capacity of 0.9 m3 while AL120 CHL has a bucket capacity of 1.4 m3 giving almost 50 % more bucket capacity and tipping load.

Advantage: AL120 Compact Hydrostatic Loader

Travel Speed

AL120 compact hydrostatic loader is a…

It may be tempting and convenient to use one type of grease for all your equipment. If you are taking care to extend the life of your equipment, you’ll need to operate with different types of grease depending on the machine and the specific jobsite conditions.

Also, different parts of a machine may require different types of grease, depending on their operating temperature.

NLGI stands for the National Lubricating Grease Institute and is the institution that certifies grease. Grease can range from NLGI #000 to NLGI #6, but the most common is NLGI #2 because it can…

Some of the reasons which make it difficult to lubricate manually every day are:

• weather conditions: rainy, chilly weather can be daunting for operators
• production needs: meeting project deadlines if given priority over maintenance.
• safety issues: the operator has to climb over the machine

• logistics: manual lubrication equipment are not always available

• time consuming: Bucket & boom pins need to be lubricated in more than one position

• Diligence: not all operators perform lubrication properly

Failure to grease every lubrication point, on every machine, every day, can negatively affect schedules, maintenance costs…

At VTN, our job is almost artisanal, product customization, necessary to satisfy the specific requirements of the user, which often varies from customer to customer. Our concept is not just a standard product line with mass production. We believe that our  being 'artisans' is a + Plus that cannot be found in other manufacturers and that allows us to be a niche player when it comes to product customisation. We provide the contractors the possibility of enjoying customised and high quality solutions that is guaranteed due to 'made-to-measure' design of the equipment. 

Understanding the needs of customers from various markets…

Time is always of the essence when it comes to road building. Regardless of whether you are shutting down a municipal road through the middle of city or a major highway linking two cities, road restrictions from construction are expected to be as minimal as possible. Delays can lead to  penalties if timing is not met and roads have to stay shut longer than anticipated. 

The Simex Planers, distributed through Suretech, are a two in one machine which is able to perform both milling and stabilising applications for the complete rehabilitation of roads and streets.  With a maximum width of…

Founded in 1991, Simex  has continued to develop new attachments suitable for various fields of application: dozens of patents applicable to roadworks, infrastructures and utilities, as well as for demolitions, constructions and quarrying.

The year 2020 was marked by numerous challenges, some more difficult than others, which Simex boldly addressed by investing further in facilities and logistics, increasing its R&D efforts and, last but not least, focusing on developing its human capital. Today, 30 years since its inception, Simex boasts a state-of-the-art production department, capable of producing up to 500 units per month during peak demand periods

Simex continuous…

The Telescopic Arm has been developed for working on underground and/or underwater down to 40 meters of depth (sixteen story below ground!). The slim construction of the Telearm is ideally suited for foundation works, narrow excavation shafts, metro stations, underground parking, underground renovations, canal clearance, and much more.........

UNDERGROUND WORK; digging work, block handling, slurry wall, underground parking

UNDERWATER WORK, (salt n’ fresh water); gravel handling, boulders n’concrete block handling, removing and/or cutting trees

WIDE RANGE OF ATTACHMENTS; clamshell bucket, orange peel, log grab, harvester head can be attached to the Telescopic Arm

Suitable for any excavator from any brand…

Around 94% of the roads In India are small and medium (rural and district) roads. As India is a highly populated country there is already some form of road connectivity available in most parts and the further development of these roads will be more of upgradation / development than a new construction.

The current motor graders available in India today except RoadMaster are   unaffordable for use by the small contractors. RoadMaster motor graders on the other hand give the lowest cost per spreading and grading not only when compared with conventional motor graders but also with manual labour, making it…

Simex TF cutter heads are ideal for trenching, profiling rock and cement walls, tunneling, quarrying, demolition, dredging, finishing operations and underwater works. They are highly effective where conventional excavation systems are too weak and percussion systems have little effect. Their quiet operation allows them to be put to work near sensitive areas (residential zones, hospitals, schools, bridges and infrastructure). Especially recommended for finishing operations, where high precision, minimum disturbance and optimum aesthetic result are required.

Characteristics:
• Precise cut

• Low vibrations

• Milled material reused on site

• Suitable for underwater works

ADVANTAGES

High performance

Low noise…

Buildings and  structures and their uses differ greatly, so must the equipment used to demolish them. Demolition is the taking down of building exteriors, followed by the demolition of its floor slab and foundations. Explosive demolition might be required for larger and immediate bringing down of a structure with equipment brought on site to clean up the debris. For the demolition of structures, there is an incredible array of machinery and technology on the market to get the job done.

Demolishing concrete is hard, time-consuming, potentially hazardous work, regardless of jobsite conditions. it is a highly skilled job due to…

Heavy construction equipment are designed for executing construction tasks, involving earthwork or other other large infra jobs. There are different types of heavy equipment each having different application and required for different construction activities.

Given below is a list of the most used heavy infra equipment 

Excavators

The modern range of Excavators come with factory fitted Advanced Telematics to providing real-time access to the operational activity and work report of your fleet of machines. It is the most in-demand heavy equipment because of its functioning terminology consisting of a boom, arm, bucket and cab on a rotating platform known as…