Grapple attachments can convert your excavator into a material handler!

posted by Sunil Newatia on December 24th, 2021
Excavators were designed to dig, but they can also save you time and money by executing several other jobs using attachments. Material handling grapple is one of them
You can lift a variety of items such as rocks, curbs, wood beams, trees, as well as infrastructure items like water boxes, pipes and sewer connections. Do site clean-up operations by moving scrap metal and concrete and even move tools like jackhammers, plate compactors or other tools and tackles. Excavator provide a good, stable base to lift and move materials on a jobsite and to help our customers, we provide a wide range of lifting attachments such as stone grapples, log grabs clamp buckets etc. 
The bigger grapples or clamps include specialized clamps for logs, pipes and scrap. Attaching a Tilt & rotating coupler to the grapple allows significantly enhanced use of grapples and lifting attachments
To get optimum performance while handling lifting and moving jobs, you need to review the manufacturer’s lifting charts and understand them. Know the total load weight [including bucket, coupler, grapple, etc.] and ensure that weight does not exceed the manufacturer’s lifting chart anywhere in the working range where you will be lifting/swinging the load

Machine has a lower rating over the side than over the front. Lifting over the side will have reduced lift capacities compared to over the front. 
All excavator manufacturers provide lifting charts and you must have them available either on the machine, with operator and with the site supervisor. Make sure your operators understand that lifting capacity as given in the chart. 

Operators also need to understand that the machine configuration will affect lift ratings. For instance, operators can maximize lift capacity and take on heavy-duty jobs by adding optional counterweights to a an excavator. Note that zero and reduced tail swing configurations may not lift as much as conventional tail swing units.
The length of the boom and arm will also significantly impact the lifting rating and performance of a machine. Keeping the load closer to the excavator will allow it to lift more weight while maintaining better stability. Place the backfill blade, if available on the machine, on the ground when lifting. The closer the load is into the tracks, the more the excavator can lift. The further out the load is, the less the excavator can lift before becoming either hydraulically or stability limited.

Bear in mind that the lifting point is usually considered to be at the excavator arm tip, not the physical load itself. The machine’s lifting point is calculated as the vertical height from the bottom of the tracks (usually ground level), and horizontal distance from the center of the turntable of the machine.
For example, if the end of the arm tip is 6 ft off the ground and 10 ft out from the center of machine when you begin to lift, that is the position on the lifting chart you need to start with . 

Finally, as the operator reaches further from the machine, lifting capacity decreases. If the machine has a long arm option, it is capable of reaching further, but at that maximum reach the total lifting capacity is usually less than a standard arm. The geometry of the boom and arm changes depending on how the machine is configured and extending too far in those situations can make a machine unstable before an operator can react and return to a safe configuration.

Excavators, if used intelligently can move all kinds of material around the job sites.

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