Sometime slower is good. Too fast maybe dangerous and can easy slip and hurt your hand or maybe jump out and hurts other part of your body or passer by.

I had experience before using normal cord drill, and use too much power break the screw and flew and lucky hit to the wall.

their office/hq(jasakita) is near my place only.. if they got accept walk it cash sales for makita products, it would be damn nice..

seems like 090 is 2x slower than 100, but the diff is only 10Nm, but i think ill take the cordless, since the portability is most important for screwdriving.. if i need any extra power i can just put the screw bit to my impact hammer - hammer and screw

will need to contact them to see where got sell the 090.. hope the price is reasonable and cheaper than bosch, else get bosch

Yes, corded drill is not recommended for screw driving, because it is difficult to control power. Corded drill only produce torque when we put more power to it. Once it's start spinning, and slipping from screw head, it tend to spin at high speed and damaging the screw head, or screw bit.

Corded or cordless Impact driver is design for screw driving. When the impact mechanism is engaged, you can see it spin slowly, but maintaining the motor speed/rpm. It is like engaging low gear. This make screw driving very controllable and efficient. IMHO, I feel very confident using the impact driver.

In the video, the the small Bosch iXO cordless screwdriver spins much slower than the impact driver, but, if you look carefully, it slipped TWICE while driving the screw. So, slower speed doesn't mean it can drive screw efficiently.

Thank you.

yeah depends on the screw head and the screw's head quality, people tend to missmatch the sizing when using screwdrivers..

which is the main cause of "head-gone/kena makan" ...

too bad dont have high-speed cam to record the drilling in slo-mo so can "see" the difference

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Added on March 5, 2012, 2:33 pmwell i used to use my B&D drill to do screwing, problem with it is the size and corded , never experience damaged screw head.. before

the only worst one was the screw head patah from the screw, lol hahahahaha

This post has been edited by JinXXX: Mar 5 2012, 02:33 PM

Agreed. use correct size of the screw bit. Typically, Phillips #2 is the most common size. I said it is difficult to control the drill power, but, if you already using it for long time, you able to manage to control the power as you like. Yeah, the main problem is the weight. I already tried screw driving with 3kg rotary hammer, and it is not as pleasant as using impact driver.

Screw head broke/patah ? heh ehh e.. I already broke several screw's heads and the tips of 2 high quality screw bits. I need to control my anxiety and adrenalin, for not over using the impact driver. That's what we call experience.

That is why torque adjustable is a must for me. Once run till the torque that is set, it will stop turn. Even no problem in fast mode.

sometimes we just wanna press down all the way,and see how fast it goes it..

just like your car.. you floor it to reach max speed/top speed.. guys will be guys.. hahahahaha

When power on hand. Need to abuse

Absolutely correct! Anyway, it is becomes experience. Sometime, I like to see how hard it can go, and later we can control it I may make another video, to see how it's look like, if I am not using the full power all the time.

I tend to use my tools at the max and as fast as possible, while making video clips. So something may breaks is not uprising. It doesn't reflect the way I am using for my DIY or home fixings. Example, I only use 1/2 of max power of my rotary hammer when drilling into my house's wall and take it easy.

So everyone should try or practice to use the power tools, and learn how it react.It is not hard todo, spend about an hour drilling into concrete block or driving screws into wood block. At the same time, you can check your tool's condition.

Thank you.

This post has been edited by bahathir: Mar 5 2012, 03:35 PM

or you will get this

Yeah... the carbon brushes failure..

Today's impact drivers are using brushless motor which reducce the risk of that particular failure.

In previous page, I showed a soft impact driver, using oil damping, but, this one is much advanced... 100 % electronic control for torque and impact.

BTW, it sound similar to oil damping soft impact driver.

http://www.hitachi-koki.com/powertools/pro...bl/wm18dbl.html
How the mechanism works.

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Added on March 5, 2012, 4:57 pmI only can see and admire the electronic pulse impact driver, Hitachi WM18D... The price is 74000 yen, or about MYR 2750 .... Wow..... The price for technology.

This post has been edited by bahathir: Mar 5 2012, 04:57 PM

What a difference from just a 10Nm more.

How do you decide which torque setting to use?

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Added on March 6, 2012, 12:29 amNo need high-speed cam.
Just attach a narrow strip of masking tape to the top of your screw so that a short strip hangs off the screw.
Then screw the usual way and watch the "flag" spin around indicating the rotation speed.

This post has been edited by totally_skint: Mar 6 2012, 12:29 AM

Easy. Use your hand to tighten some screw or use those already there. Set the torque about what you think is best. Let say 20N. Than reverse untight the screw. If the tool get slip and the screw won't turn, than you know you need higher torque. Set it to 30N than and try again. Till the screw turn. And you know what torque to set.

Usually set at 30-40N. This is average our hand tighten a screw around M3-M6 thread. Bigger higher torque.

I bought it at Ace hardware@Mines. I found it at 'sprit level' rack.
The model number is Sellery 11-227. Mini ratchet handle with 17 pieces bits.

I googled the product, but I only found the model WITHOUT the socket wrenches.

Torque.
If you not confident about overtightened screws, you can always use normal screwdriver and tight with your hand. At least, you already save lots of time driving the screw with power tools.

For wood, just drive the screw until it flush to the surface. For machine screw or bolt, it a bit difficult to tighten at certain torque, because impact driver can deliver enormous torque without twisting your hand, like normal power drill driver. Yeah, This is a downside of the impact driver, because we cannot 'feel' the torque accurately.

BTW, even we can use normal screwdriver/wrench to tighten the bolt/screw, but, it is still not precise... For the purpose, we can use torque wrench.

TQ

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Added on March 6, 2012, 1:32 pmHow about the video clip on post #2 in the first page. TD100D vs BTD141.
100Nm corded impact drill vs 140Nm cordless impact driver ?

Even a small cordless impact driver has more than 100Nm of torque, and it being used by many professionals, DIYers, ... If this type of tool has many problems, why the torque is getting higher and higher ..

How about this... Makita TD147 .. the shortest and the most powerful cordless impact driver. 170Nm! More than enough torque to remove and screw the car's wheel nuts.

http://www.makita.co.jp/product/category/a...47d/td147d.html
(In Japanese)

It is 70Nm more torque than the corded impact driver..

Again, why more torque, just for screw driving?

This post has been edited by bahathir: Mar 6 2012, 01:32 PM

Because in the wise words of Tim "The Tool Man" Taylor, "MORE POWER"

More power to goes wrong. That's why high end super torque impact drivver has speed and torque selector. So it is safe for people who knows how to use it

I didn't limit my tool just for 1 job. My screw driving tool does not mean just drive a screw and that it. I can utilise the extra torque to drill a diameter hole that maximun it can handle. Since it is cordless and smaller size, it is handy to use.

I have another drill tool call dremill. It is a famous tool among craft and modeling kaki. This drill have a 10krpm and smaller size which can handle like a pen. It can do alot of job with some option attachment. (from the manual provided) From here I learn what a drill tool can do more than that.

Yes, there are correct tools for certain tasks. I also might using the Dremel multitool with some of the attachements.

http://www.dremel.com/en-us/Attachments/Pa...es.aspx?catid=9

It about conveniences and efficiency doing the tasks, what I demonstrated in the video clips. I can drive screw using screwdriver, ratchet handle, cordless screwdriver, impact driver and rotary hammer. For certain cases, impact driver is the best, and other cases, the screwdriver is the best tool. In most cases the impact driver is my choice for screw driving.

Beside screw bits, I also get free drill bits set for wood and steel drilling up to 6mm, which is enough for most of my DIY tasks. I also bought several type of screw's head bits and nut setter. The 4 mm (5/32") hex (alen key) bit is very useful when to assemble cabinets or re-tighten alen key screw which being used in most of the furnitures in my house. I also have hex -> socket adapter, and convert the impact driver into a low class impact wrench, which can use as socket wrench up to 12mm. Here, I extend the usability of the impact driver with accessories, relevant to my usage.

To further extend the impact driver capabilities, I also tried to make a small grass cutter,by tighten 2 cable tighter to the long screw driver bit. Yeah, it works,...., for several seconds heh eh e.. Yeah, the cable tighter material is not strong enough to withstand the force hitting the grasses. Mmm... I can try to use metal blade,, but.. it is just too dangerous.


IMHO my impact driver also a 'limited' multi tool.

Want to see another usage of power tools ?


This post has been edited by bahathir: Mar 8 2012, 11:08 AM

what about those plastic/fiber thread specifically made for cutting grass ?

but need to find a way to attach it to the bit

Very smart of them. Electric motor maximum torque @ 0 RPM.