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Hello Friends In this video I have tried to give you detailed information about Cordless Hammer Drill. I hope this video will prove useful for you.
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How does a cordless hammer drill work ?
The action of a hammer drill is right there in the name: it's a hammer and a drill working in tandem. While the drill rotates, a gear-driven cam introduces a linear striking motion along the path of the drill bit. In effect, it combines chiseling and drilling in the same tool.
Each type of drill uses a unique motion to get the job done.
It’s an action that’s particularly effective in drilling brick, cinder block, concrete, and similar materials. However, while heavy-duty slotted drive system (SDS) models are capable of drilling through walls several feet thick, it is not an effective way to drill wood, plastic, or metal. To do that, the hammer action needs to be disengaged. Many hammer drills allow this, though some SDS models do not.
Describing a tool as an “impact driver” might suggest it has a similar action to a hammer. In some ways it does, though an impact driver provides increased rotational energy, better known as torque.
Inside the impact driver body is a heavy-duty spring. It is compressed every half turn then releases, delivering tremendous force. It makes a similar sound to a hammer drill, but the energy goes in the same direction as the chuck rotation, not in a straight line along the drill bit. Thus the focus of the force is to drive screws and other fasteners, or indeed undo them. Early impact drivers were very much brute force, all-or-nothing tools. Modern versions offer greater flexibility with variable speed.
A cordless drill/driver has the simplest action, in that it is purely rotational without any additional force. However, this tool has a different trick up its sleeve: the addition of a clutch.
Small hammer drills can be used to drive screws (some consumer-grade models incorporate a clutch), but many are too large and powerful. Impact drivers are the perfect tool for heavy-duty driving, but most aren’t intended for delicate, precision work. The clutch on a cordless drill/driver allows you to reduce the amount of torque applied to a screw so that when that limit is reached, the clutch slips and the chuck stops rotating. This is valuable when driving into softer materials like wood or drywall, preventing you from accidentally driving the screw below the surface or even, as can happen, right the way through.
Each has a different chuck and accepts different bits.
Hammer Drills
The majority of hammer drills have a self-centering three-jaw chuck. These are often keyless, but heavy-duty models have a keyed chuck, which allows for a tighter grip on the drill bit. SDS hammer drills have a spring-loaded chuck, with ball bearings that lock into grooves on SDS drill bits. A sliding sleeve releases them.
General-purpose masonry bits for hammer drills have the same round shanks as found on standard drill bits for wood or metal. Many share the same base material, high-speed steel (HSS). Where masonry bits differ is at the tip. It is wider, and designed to chip away at the surface while it rotates. The spiral flutes behind the tip don’t actually cut at all, they are there to funnel waste out of the way.
SDS drill bits are very similar in construction, but the shank is modified to suit the relevant SDS chuck. These give a more secure hold for heavy-duty drilling.
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introduction 0:00
hammer drill Unboxing 0:20
hammer drill animation 02:20
3 in 1 cordless hammer drill 03:13
teardown & what's inside hammer drill 04:35
cordless hammer drill brushless motor 07:15
hammer drill working 08:45
cordless hammer drill brushed motor 10:50
hammer drill battery teardown 12:38
hammer drill charger teardown 14:15
cordless hammer drill testing 15:20
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