Showing posts with label rotary hammer. Show all posts
Showing posts with label rotary hammer. Show all posts

Bosch 11230EVS 1-1/2-Inch Electronic Variable-Speed SDS-Max Rotary Hammer with Stop Rotation Review

Bosch 11230EVS 1-1/2-Inch Electronic Variable-Speed SDS-Max Rotary Hammer with Stop Rotation
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Rotary hammers are a big buck item so its important to consider all of them. I use this Bosch hammer in my electrical contracting business. Its small enough to handle easily and it is built to minimize the vibration that comes with drilling concrete. It can drill through concrete up to is specification and handle ground rod driving too. Buy this unit and the Bosch bits but consider the DeWalt accessories, like ground rod driver or spade bit, because they are usually less money.

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Bosch 11245EVS 2-Inch SDS-Max Rotary Hammer Review

Bosch 11245EVS 2-Inch SDS-Max Rotary Hammer
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I purchased this unit after test-renting a Bosch 11316 Demolition Hammer in order to dig 25 very deep tree holes in the hard, California clay soil where I live. The 11316 was massive overkill for the job (I used it on 30-40% power all day), and often sunk deep into the cement-hard soil just under its own weight!
The 11241 is a fantastic tool - it digs with a clay spade at a moderate pace, dramatically reducing workload for terraforming (moving a lot of dirt, as I did with a retaining wall), and for trenching, digging, and moderate-duty demolition.
BEWARE - it takes 3-4 hours of use before it really *works*. Out of the box, brand new, you will swear this thing is broken. Read the manual - it vaguely refers to a 5 hour break-in period. Trust me, not much happens for the first 2 hours - I recommend finding drilling applications.
So far, I've trenched, drilled holes in concrete, done terraforming, and some serious digging for tree planting and
other gardening tasks. The weight of this unit is ideal for the application, and the power is just sufficient. (5 stars would be reserved for a bit more power - it takes a while to get through some applications where old roots are in the way - the 11316 cut through them like a hot knife through butter).
I've yet to try this unit on concrete - I suspect it will do a credible job, but not great, due to its moderate power output.
I have the clay spade, acaling chisel, and two bull points of different lengths. All work very well.
One superior aspect of this unit over the 11316 monster - the vibration isolation is really nice in the handle. My wrists can tolerate 2-3 hours/day of this work, where 2 hours of the 11316 caused me a week or so of serious aching.

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Makita HR4002 1-9/16-Inch SDS-MAX Rotary Hammer Review

Makita HR4002 1-9/16-Inch SDS-MAX Rotary Hammer
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I love this hammer 10 min out of the box I am removing a 80 year old fireplace flu. This thing is a beast. I know that bosch is known for the best hammers,but the comparable
bosch is $80 more and almost same specs. I figured the money I saved can be spent on bits and with SDS MAX bits they are expensive. This thing blazes through tile and with a few
outlineing holes will cut through a basment wall in minutes. I am self employed and buy lots of tools when I get a new tool I use the tool for a month or so before I write my
name on it I used this for 1 week straight for 40 to 60 min at a time and was so impressed I wrote my name on it that day without worry of having to send it back. If you need
a good rotary hammer this could be the one for you and a great price as well.

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The new HR4002 rotary hammer is sleek, powerful, compact, and ergonomically designed to increase your comfort as well as your production. Featuring a powerful 10 AMP motor, a no hammering option to aid in a longer life and greater performance of your tool, a soft grip to help your comfort and reduce the vibrations as well as a built-in torque to limit clutch disengagements if the bit jams and to ensure stable torque control.

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Hitachi DH38YE 1 1/2-Inch Spline Rotary Hammer Review

Hitachi DH38YE 1 1/2-Inch Spline Rotary Hammer
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Like most Hitachi tools , this is very well engineered. It stands up to all kinds of abuse. Mine ran for years drilling all sizes of holes in old hard concrete. I also used it for chipping which is hard on roto hammers. They don't have a lot of power for breaking concrete as this is not their intended primary use. So when you do use them for breaking , they have to run a lot longer than a demolition hammer would. It has pretty good power for drilling though. I bought mine used and had it for five years before replacing it recently. I went to SDS max which is currently replacing spline drive in the large rotary hammer market. It is a tighter mechanism which transfers more of the hammering power to the bit , resulting in faster drilling performance. If you have a lot of spline bits , this would be a good tool to buy. If you are starting from scratch , I would recommend the SDS max hammers from Hilti , Bosch or milwaukee

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Sealed grease system insures minimal maintenance. Auto-stop carbon brushes to protect armature. Dust-proof cover for extended maintenance-free operation. STANDARD EQUIPMENT: Plastic Case (317657), Side Handle (981870), Depth Stopper (971786), 3 Dust Covers (985373), Hex Wrench (944459) and Hammer Grease A 1 oz Tube (981840) SPECIFICATIONS: 8 AMP 18V motor, Impact energy of 5.2 ft./lbs. No-load speed of 380 RPM and 2800 BPM. Capacities: Drill 1-1/2". Core bit 4-1/8".

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