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dwain

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Posts posted by dwain

  1. Bosch VS Milwaukee Brushless 18v Impact Speed Challenge

    in Power Tools

    Posted

    Javier, is there any way you could do a runtime/power test with both on 4.0ah batteries? Or running the Milwaukee on 2ah? Wouldn't have to be video'd necessarily (we trust you :)).The possibility of battery size affecting available power, and the Milwaukee possibly running better at the start of testing are really messing with my head! :P

     

    http://professional-power-tool-guide.com/power-tool-forum/index.php?/topic/3865-does-a-larger-battery-give-more-power-results-inside/

    http://professional-power-tool-guide.com/2012/08/friday-night-tool-fight-dewalt-vs-milwaukee-brushless-impact-drivers/

     

    If you can't, no matter. Still appreciate the excellent video!

  3. Does a larger battery give more POWER? Results inside...

    in Power Tools

    Posted

    A few times in recent months I have heard the opinion that larger batteries can actually give more power, no just longer runtime. It came up again in Javier's excellent video putting the new Bosch Hybrid Impact against the FUEL impact: http://professional-power-tool-guide.com/power-tool-forum/index.php?/topic/3851-bosch-vs-milwaukee-brushless-18v-impact-speed-challenge/

     

    Being a skeptic of this, I decided to do some testing myself. I have a new respect for anyone who makes a decent video with a fairly scientific approach to testing, it is much harder than it looks. I just took some photos. Here's a couple of setup photos:

    post-21032-0-71739200-1395919695_thumb.jpost-21032-0-86911800-1395919797_thumb.j

     

    Everything was done in 4x4 rough cut treated pine (very soft). Screws were timed going in, not backing out. The 25mm auger bit tests were in and out. The batteries were always on 2 or 3 bars charge.

     

    DCF886 Impact Driver driving 3 No. 8mm x 90mm lag screws. I did this test twice (one at the end of other tests since it was so different). Both batteries actually sheared the third screw at the same depth! Very uncanny. It didn't happen in the second run, which took much longer on the 2.0Ah for some reason...

    2.0Ah - 59.7 secs & 99 secs

    4.0Ah - 46.7 secs & 49 secs

    post-21032-0-58064300-1395919957_thumb.jpost-21032-0-61818200-1395919876_thumb.jpost-21032-0-12766400-1395919882_thumb.jpost-21032-0-98786800-1395919886_thumb.j

     

    DCD790 Compact Drill driving 3 No. 8mm x 50mm lag screws. The drill cut out every time as the head of the lag hit the washer.

    2.0 Ah - 15.0 secs

    4.0Ah - 15.3 secs

    post-21032-0-89873700-1395920384_thumb.j

     

    DCD985 Premium Drill drilling 4 No. Holes with 25mm auger bit. On both batteries I had to switch from 2nd gear to 1st gear on the third hole.

    2.0Ah - 43.4 secs

    4.0Ah - 44.5 secs

    post-21032-0-07754500-1395920405_thumb.j

     

    The results surprised me immensely! There was a clear power difference in the hand when using the impact driver with 4Ah batteries, but no difference with the drills (as reflected in the results). All scenarios were a big test for the tools. I would have guessed that the impact would be the least affected by battery size, but the results clearly disagreed.

     

    The testing was not perfect, but I am definitely convinced of using larger batteries in an impact driver for large screws. It would be harder to measure, but an angle grinder and/or circular saw test would be interesting.

  4. Dewalt Brushless kit vs. Milwaukee Fuel kit

    in Power Tools

    Posted

    Oh Gawd....one of the obnoxious Dewalt guys :)

     

    Haha. Truth be told, I voted Milwuakee in the viewers choice award ;) I have half Dewalt 20v and half Bosch 18V, but am jealous of Milwaukee FUEL grinder/circ/sawzall.

     

    But in this Drill/Impact/Recip comparison, I think yellow is the clear value winner :) But as I said in my first post, if you're a plumber/electrician or anyone else who would benefit from Milwaukee's specialist tools / bigger line-up, its the obvious choice.

     

    EDIT: oh, and I was never in the Dewalt Owners Group. I'm a TIA man through and through.

  5. Dewalt Brushless kit vs. Milwaukee Fuel kit

    in Power Tools

    Posted

    price is a good point to make. the brushless options from Milwaukee are excellent tools, but have a price to match. Dewalt seems to be generally a little cheaper.

     

    I vote for milwaukee as well, that way you can say "hey, hand me that sawzall"

    but unless its the (expensive) FUEL version, you have to say, "hey, hand me that average sawzall" :P

    • Like 1

  6. Dewalt Brushless kit vs. Milwaukee Fuel kit

    in Power Tools

    Posted

    I'm assuming the Dewalt kit includes the recent heavy-duty DCD995. If I were a plumber/electrician, Milwaukee is the easy/obvious choice.

     

    For others, I'd choose the Dewalt (just), with the following summary:

     

    Drills - both awesome, but Dewalt has longer runtime. Dewalt probably best for timber, Milwaukee probably better in hammer mode.

    Impacts - both awesome, VERY similar runtime, power goes to the Milwaukee (just), as does the 3 speed. Dewalt has the 3 LED lights (very handy).

    Recips - FUEL >> Dewalt >> M18. Dewalt won the 2012 award, its an excellent tool. Milwaukees brushed M18 was apparently a bit of a letdown.

     

    The Dewalt tool lights stay on for 20 seconds after you let go of the trigger, and its actually super handy. Turns every tool into a torch already in your hand. And of course, the Dewalt is cheaper (great prices!).

    • Like 1

  7. Bosch VS Milwaukee Brushless 18v Impact Speed Challenge

    in Power Tools

    Posted

    Your "speed" test is pulling alot of amps from the packs, and that gives the bigger pack the upper hand.

     

    To put it more clearly, not only do batteries have an amp hour rating for capacity, they also have one for discharge rates.  That fat pack will handle twice the discharge rate of a slim pack

     

    Hi Mike. I've heard this theory before but have never seen any proof (mathematical or empirical). Can you provide any?

     

    I suppose many of us could compare certain activities (i.e. lag bolts with impact driver) with different size batteries (on the same skin) and time it.... maybe i will.

  12. Invest in M12 System?

    in Power Tools

    Posted

    yep i only kept the 12v Max line cause i've got options in other (18v) platforms, and because i've convinced myself its part of my dewalt line (only have 1 dewalt charger).

     

    but if it was to be your 'go to' tools, especially as a tradesman, you'd be crazy to pick dewalt 12v over bosch, makita and especially milwaukee.

     

    re: the 20v brushless drill being shorter, i can confirm that. the 12v is still much lighter, and its flatpack battery is much smaller, but the brushless 20v is just waaaay better.

  17. My first chair (for daughter)

    in Around The House

    Posted

    For those who had read/commented on my first build thread, you'll know i started building a chair to go with her loft bed and desk - http://professional-power-tool-guide.com/power-tool-forum/index.php?/topic/2189-daughters-loft-bed/

     

    Well, I'm 99% done with the chair! I think I must have honestly spent 25+ hours on this thing! Mostly because I have never done mortice & tenon, dowelling or pocket screwing before this chair. If I had known it would take this long, I might have done it out of hardwood, but since I always planned to paint it to match her bed, I was happy with pine. I really want to convince my daughter to just let me stain it, but its hard to argue with a 5 year old ... :P

     

    So its been a great learning experience! I'm feeling really proud of it at the moment, its actually more comfortable than our dining chairs! It should last her a long time.

     

    Thanks for all the encouragement!

     

     

  21. Makita 18X2 Circular Saw

    in Makita

    Posted

    its really not much more than the FUEL circ saw right? considering the power you get, doesn't seem fair to criticise its cost that much, especially for those who are already on the platform with plenty of batts ...

     

    seems pretty innovative to allow 18V users a 36V 7-1/4" circ saw ...

  23. Bosch 18v Brushless Hybrid Impact & Compact Drill Review

    in Power Tools

    Posted

    Fantastic videos Javier! I've been looking forward to seeing reviews of the new Bosch brushless stuff.

     

    I've messed around with the brushed version of these and LOVE the drill and liked the Impact Driver. Do you have any other impact drivers (i.e. dewalt or milwaukee) to test again in high load application? My only slight disappointment of the first hybrid was the power (compared to my dewalt).

  25. Which impact wrench size to get?

    in Power Tools

    Posted

    I know all kinds of stuff about Engineering and I couldn't tell you who's right or wrong.

    Of course my Engineering knowledge pertains to driving a choo choo train :lol:

    I would think an identical motor would spin the larger, heavier, anvil, slower thus generating less force, but again, I just blow the whistle and wave at little kids most of the time.

     

    hehe. i only mentioned being an engineer to illustrate that a basic knowledge of physics didn't make the previous point clear. designing pipelines etc doesn't help me with this at all ;)

     

    if the anvil was the actual load, your point would be very valid . however the force required to make the anvil rotate is insignificant compared to the force required to drive the socket/screw etc.

     

    interestingly, if you had two anvils that weighed the same and had the same centre of gravity (the actual difference would be insignificant) but had different size, they would rotate with the same RPM at no load. That is, the outside velocity of the bigger anvil would be higher, but the RPM would be identical. As Dewalt have stated it, both 3/8" and 1/2" 20v compact wrench models have the same RPM (2300).

     

    this is all a long way of saying that, IMHO, the motor would determine the torque, and the size of the anvil should have no impact (no pun intended). 

    • Like 1
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