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Masters - Dewalt 14.4v Hammer Drill and Impact Driver Kit - Black $298 from $429 (Save $131)

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Masters - Dewalt 14.4v Hammer Drill and Impact Driver Kit - Black $298 from $429 (Save $131)
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yue01 on 31/05/2015 - 17:11 masters.com.au (595 clicks)
Last edited 31/05/2015 - 17:13

Hi,

New Dewalt hammer drill and impact driver with intelligent trigger design

Use driver and drill in confined spaces due to ultra-compact and lightweight design

Ergonomic design with rubber grip fits right in your hand

Black hammer drill can be used in smaller spaces because of how light and compact it is! Fits right in the palm of your hand with new rubber grip and ergonomic design. Driver provides one-hand fitment with 6.35mm 'drop in' keyless hex driver. Dewalt driver kit also has quick insertion and removal with Li-Ion slide pack battery, with latest generation 14.4V XR Li-Ion compact hammer drill/driver featuring new XR Li-Ion battery technology. Battery has 14.4 volts, with multi-voltage charger exchangeable with 18V, 14.4V, and 10.8V XR Li-Ion slide pack batteries

Electrical & Electronics

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closed Comments

  • hippyhippy on 31/05/2015 - 17:18
    +4

    You can get 18v for similar price.. power is directly proportional to the voltage.

    • rolypoly on 31/05/2015 - 17:52
      -1

      Power is not directly proportional to voltage.

      • jimmej on 31/05/2015 - 18:55
        +2

        Power=voltage x current

        • rolypoly on 31/05/2015 - 19:10
          +2

          And current isnt a constant.

        • CyberGenesys on 31/05/2015 - 21:19
          -1

          @rolypoly: The constancy of current does not change the relationship between power and voltage.

        • rolypoly on 31/05/2015 - 22:53

          @CyberGenesys: Definition by wolfram.

          If a is (directly) proportional to b, then a/b is a constant. The relationship is written a proportional b, which implies
          a=cb,
          for some constant c known as the constant of proportionality.

        • rolypoly on 31/05/2015 - 22:55

          @CyberGenesys: Here is another

          Two quantities y and x are said to be directly proportional, proportional, or "in direct proportion" if y is given by a constant multiple of x, i.e., y=cx for c a constant. This relationship is commonly written y proportional x.

        • rolypoly on 31/05/2015 - 23:15

          @CyberGenesys: "Directly proportional" means something very specific in engineering. And this is all semantics, none of this is even relevant.

          All I was trying to point out was that hippyhippy seemed to imply that simply getting a drill that was twice the voltage will result in a drill that has twice the power. Which is simply not the case. I am not sure if that was the implication but that was what I inferred.

          You are correct in that the constancy of current does not change the relationship between power and voltage however I inferred that to mean that you implied I was wrong about power not being directly proportional to voltage.

          The ∝ symbol is used in engineering to mean a directly proportional relationship. It is unambiguously used when the ratio will remain constant. The word proportional is also used, but only when the relationship is assumed to be constant, I have never heard the word proportional used in a professional setting when the relationship is not a constant ratio.

          To say that Distance and time are proportional when speed is a variable would sound absurd. And in this case the current is certainly not a constant.

          Here is the wikipedia definition:
          In mathematics, two variables are proportional if a change in one is always accompanied by a change in the other, and if the changes are always related by use of a constant multiplier. The constant is called the coefficient of proportionality or proportionality constant.

    • Bellyup on 31/05/2015 - 20:35

      Give us a link

  • diro on 31/05/2015 - 17:44

    http://www.bunnings.com.au/dewalt-18v-3-piece-cordless-combo…

    Is this better value?

  • 8200 on 31/05/2015 - 18:35
    -7

    Black & Decker in a different frock….

  • masuta on 01/06/2015 - 00:07

    It's hard to justify these when I got the last masters dewalt deal of 3 tools for $120.

  • [Deactivated] on 01/06/2015 - 00:41

    I had mine from Sydney Tool,

    Tough Case
    impact driver
    hammer drill
    charger
    two 18V batteries

    When I bought them less than $400 including shipping to WA

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