Concrete demolition is one of the few operations on the job site. That requires unrestrained, raw power to the same degree as other tasks. Contractors and hardcore do-it-yourselfers alike are confronted with a bewildering variety of options. Each of which asserts that it is the superior option. When they embark on the challenging process of breaking up old concrete. When deciding on which type to purchase, the first question you want to be answered is – how do jackhammers work?
There is a staggering number of equipment that all strike metal against concrete in various ways, from handheld rotary hammers to mounted breaker hammers. Every tool has its own unique purpose. However, the jack hammer’s strengths lie in the ease with which it can be used and the breadth of its application.
The jackhammer does not come with any drill bits or rotation modes. Instead, it comes with various solid chisels driven by the hammer and designed to chip away at and break up tile and concrete with excellent efficiency.
The Operation of Jack Hammers
The more powerful in-line tools propelled by compressed air are the traditional representation of the jackhammer, which you may recognise from movies or television shows depicting construction on roads. Depending on the type of power instrument, jackhammers can also be called pneumatic drills or demolition hammers. These names are used interchangeably.
There are also demo hammers weighing less than thirty pounds used for interior construction. These smaller hammers chip away at walls to create openings for conduits and other items. The majority of jackhammers have a gear that spins, and this gear powers a piston housed inside the cylinder. The quicker the gear turns, the more power is transferred to the piston. As it travels through the cylinder and crashes into the air cushion at the bottom of the cylinder. This continues until the piston reaches the bottom of the cylinder.
Each strike causes the distinctive burst of air to be expelled from the tool’s vents, which is caused by the pressure driving another piston that crashes against the business end of the tool.
There are also models of jackhammers that do not include an air pocket at all and instead have designs that feature a direct metal-to-metal strike.
Selecting the Appropriate Kind of Jack Hammer for the Task at Hand…
The size of the jackhammer is typically the deciding factor in which one is selected as the most suitable tool. When it comes to demolition work, size and power are of the utmost importance. Always make sure that your instrument can live up to those expectations.
If you’re using the demo hammer for horizontal applications like chipping out grooves at waist height or higher, you’d benefit from having a lighter model. On a single construction site, it is not unusual to find a variety of jackhammers being used for various purposes by different operators. In the construction sector, jackhammers are often categorised into one of three primary weight groups.
Chipping hammers and demo hammers are common names for models weighing less than 30 pounds. Heavy-duty variants starting at about 35 pounds are typically referred to as breaker hammers or pavement breakers due to their greater weight. Then there are the construction-grade models, which may weigh up to 100 pounds and have a maximum weight of 60 pounds.
You can choose between electrical pneumatic kinds, air-driven pneumatic types, and industrial-grade hydraulic hammers when it comes to handheld jackhammers or demo hammers.
Demolition hammers and Jackhammers, lightweight
In terms of power, light jackhammer models include those that fall within the 20 to 30 pounds weight range and include chipping hammers. The power output of these jackhammers is generally comparable to that of rotary drills operating in hammer mode.
The electric pneumatic kind of jackhammer is nearly generally used for the lighter models. Many lightweight jackhammers have the form factor of an L-shaped pistol grip, which makes them particularly well-suited for horizontal operations. Work on walls and ceilings is where light jackhammers weighing less than 25 pounds really shine. Still, they’re also great for rehabilitation projects and indoor demolition work.
They help tidy up edges that have been left behind by more intensive demolition work and chipping out the concrete around pipes, conduits, chases, and finishes. The term “chipping hammer” refers to tiny demolition hammers, some of which can be somewhat compact.
Some corded chipping hammers weigh less than 7 pounds and are more feasible for small, precise work around light brick material because of their lighter weight. The air hammer would also be an excellent replacement for some less strenuous tasks.
Medium Jack Hammers
Models of jackhammers with weights ranging from 35 to 40 pounds bridge the gap between lightweight jackhammers and mighty pavement breakers. In this weight range, the jackhammer models begin to offer a hybrid design between an inline grip and a pistol grip. Which enables the tool to be used in either the horizontal or the vertical position.
These jackhammers are versatile tools. Then can break up heavy concrete and a bit of detailed chipping work. This versatility is reflected in the wide variety of chisels and shanks available for them. Jackhammers are commonly used in construction and demolition work. They are designed for use in heavy-duty situations. Still, with the addition of the appropriate flat or scraping chisel attachments, they can also do chiselling operations.
The majority of these medium-sized heavy-duty jackhammers are of the electric pneumatic sort. While they are not essential for constructing roads, they do have their role.
Heavy-duty electrics fill in the gaps left by the inability of contractors to run a sufficient number of significant breakers off of their air compressors. Thus, moving freely around the construction site to take care of lesser duties and smooth out rough edges.
Heavy Jack Hammers
The vertical uses of these jackhammers are made possible by their weight. These machines are certainly not light, with a starting weight of sixty pounds. Because of the typical task on construction sites, this specific category of jackhammers is also known as pavement breakers.
You’ll start to see pneumatic jackhammers and portable hydraulic equipment at this weight range. Pneumatic jackhammers can also be referred to as pneumatic hammers or pneumatic drills. These tools get their power from compressed air, so you will require a portable air compressor to operate them.
The development of hydraulic jack hammer technology has advanced to the point where it is now possible to employ a portable tool version. Some hydraulic jackhammers are powered by a portable hydraulic compressor or even a worn power pack connected to the jackhammer by hydraulic hoses.
Other models have a compact gasoline or diesel-fueled engine that operates a hydraulic pump integral to the instrument itself.
Jack Hammers that are Mounted
There is no comprehensive guide to jackhammers that does not include a discussion of mechanically mounted jackhammers. The only way to operate these enormous machines is with the assistance of an excavator or a backhoe. They find widespread application in heavy-duty construction groundwork, roadwork, quarrying, and large-scale demolition. The amount of rock that can be removed in a single day is fantastic compared to expensive blasting.
Jackhammers are powered by compressed air.
The pneumatic jackhammer (pneumatic drill) is the original form of the jackhammer and dates back to its invention in the 1800s. Known as the “classic” version of the jackhammer.
A compressed air line delivers power to the jackhammer, which powers an internal hammer that smashes the shaft. This fundamental principle has stayed the same throughout the years and can be explained as follows:
The majority of pneumatic jackhammers now come equipped with a silencer sleeve that wraps around the tool’s barrel to mitigate the risk posed by this danger. The already alarmingly loud noise that a traditional pneumatic jack hammer creates is given an additional boost of power. Thus, the explosive air exhaust of pneumatic jackhammers can be found on some models.
When using a pneumatic jackhammer, the operator is also subjected to an excessive amount of vibration. Which, over time, can build-up to the point where it might disrupt blood circulation in the hands. Protective hand gloves are one way to alleviate some of the discomforts, and recently, manufacturers have also begun offering vibration reduction systems.
Hydraulic Jack Hammers
Jackhammer hydraulic systems are often reserved for mechanical excavators and backhoes in outside operations. However, the size of these machines makes it impractical to use them when working within structures or when they are surrounded by built spaces.
Because of the demand for hydraulically powered jackhammers, portable hydraulic jackhammers have come into existence. These jackhammers can be more compact than the conventional combination of a pneumatic hammer and an air compressor. Most portable hydraulic jackhammers are more effective and robust than comparable pneumatic models. These power packs can be powered by compact gas or diesel engines.
Jackhammers that are portable and powered by hydraulics have become increasingly common as a component of standard equipment for usage by emergency response teams. The little two-stroke engines can make them somewhat cumbersome. Still, because there are no compressors, hoses, or wires to set up, this tool can be transported to virtually any location.
Electric Jack Hammers are used here.
Electric jack hammer types are now available for practically every weight class of hammers available today. Beginning with tiny 6-pound chipper hammers and progressing up to vertical 60-pound jackhammers.
Jackhammers are becoming increasingly popular among rental businesses because they do not produce any emissions and require very little maintenance.
Many manufacturers have also begun adding capabilities to their electric jackhammers that are typically seen on more sophisticated consumer power tool models. These new functions can be found on electric jackhammers. Dust control, vibration control, auxiliary handles, LED maintenance indications, and dust control. Have quickly become standard features in electric jackhammers and new tips and improved attachment methods.
Electronic jackhammers still have a ways to go before they reach their full potential in terms of raw force. Heavier pneumatic jackhammers’ performance is superior to that of even the most potent electric variants. Compared to their electric counterparts, compressor-powered jackhammers often deliver twice as much impact force as their counterparts.
Things to Search for When Purchasing Jackhammers
- Noise level control features assist in saving your hearing. Still, they also ensure that both your tool and your worksite comply with the rules for noise emission. The use of mufflers and silencers is an effective means of lowering overall noise levels.
- Vibration control features, such as vibration dampening handles and internal shock absorbers can help you avoid white finger and carpal tunnel syndrome. These features can be found in a variety of products.
- The power settings and dials on the jackhammer are easy to access. So you can use them without taking your hands off the tool. Additionally, the configuration of the jackhammer makes it possible to operate it even while wearing gloves.
- It is also vital to have boxes and tool cases to prevent losing various bits and attachments with your jackhammer.
- Insulated plugs make it possible to use corded electric jackhammers even when the weather is not completely clear.
- LED service and power lights let you know when electric motor brushes need to be replaced. Or when there are problems with the cord that could cause harm to the motor.
- The demolition hammer’s soft start and variable speed settings allow for a more controlled and accurate start. While working close to breakable objects such as pipes, conduits, and similar structures.
- Lock-on button controls free your hands so you can concentrate on properly holding the tool for extended periods.
Here are some comparisons: whether we’re talking about Jack Hammers, Chipper Hammers, or Demolition Hammers.
Your choice of jackhammer should, in the end, frequently be determined. By the kind of demolition work, you will be doing. A lighter electric demo hammer is the item you need if most of the job you will be doing inside will involve the walls and ceilings.
You will find that having the appropriate air jack hammer at your disposal is helpful. When cracking age-hardened pavement slabs or breaking up considerable lengths of asphalt. When selecting a jackhammer for a specific job, the amount of power available and the tool’s overall weight are typically the deciding factors. However, when confronted with a challenging decision, the tools’ capabilities might make all the difference.
When it comes to jackhammers, weight is a factor taken into severe consideration. As a result, these power tools are categorised according to their weight. Which helps to clearly distinguish which kinds of work they are best suited to do.
When referring to portable devices, weight is typically expressed in pounds. There is a bewilderingly wide range of weights from which to pick. A compact chipper hammer should weigh no less than 3kg, while larger ones can weigh up to 40kg or more depending on whether they are propelled by air, gas, or both.
Both Power and Rapidity
Demolition work requires power, and the adequate power of your jackhammer can be affected by several variables. Including its weight, the impact energy it delivers, the number of times it strikes per minute. And even how well it is balanced.
The energy of a collision, also known as the impact force, is typically expressed in foot-pounds. The greater the number, the more oomph the jackhammer can pack, mainly when a significant amount of mass supports it. Speed measurement is typically expressed in beats per minute (BPM), and producers will frequently refer to a “no-load” BPM rating. When the rating is higher, the tool will cycle between hits more quickly, resulting in shorter periods spent demolishing structures. However, one must take into consideration the heightened vibration.
To indicate the possible power of the tool. The manufacturer will also offer data about the motor power or air pressure. This information will be given in Amps (A) for electric jackhammers. The statistics for pneumatic jackhammers will be given in cubic feet per minute (CFM) and pounds per square inch (PSI). It is helpful to have all this information when matching jackhammers with air compressors.
The mini-engines contained within portable gas-powered hydraulics each have their own specific displacement and power ratings. It is common practice to express them in terms of cubic centimetres (cc) and horsepower (hp).
Chisels are used commonly in jackhammers and their various types
- Straight Ahead Chisels allow you to cut edges and direct the direction in which breaks occur.
You can drive stakes into concrete for beginning and breaking points with the help of Stake Driver Tips.
- In addition, they allow you to add flat borders, and they function admirably in either clay or dirt.
- Thanks to their flexibility, the Flex Chisel Tips are designed to allow access under pavers and tiles.
- The Point Tips are designed for general-purpose demolition of concrete and masonry.
- Brushing Tools and Scrabblers help smooth rough places on concrete. And provide a surface with a cleaner finish in preparation for bonding.