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再来看看impact driver
http://www.cordless-drill-reviews.com/hitachi-wh18dl.html
评测是Best value, 分数高于所有的impact Driver, 尺寸和平衡感都是最好的，重量也是最轻的
Impact Driver Performance Comparison:
WH18DL Average 18V Driver
Power 1330 in-lbs torque 1410 in-lbs torque
Speed 2,600 RPM 2,545 RPM
Weight 3.5 lbs 3.6 lbs
Battery 3.0 Ah 2.2 Ah
Impact 3,200 IPM 3,125 IPM
Hitachi WH18DL Ratings:
A-Excellent B-Very Good C-Good D-Fair F-Poor
> Rating Above Average Top 5 Rank Below Average Low 5 Rank
Power B- - - 6% -
Weight B+ 3% - - -
Speed B+ 2% - - -
Battery A 36% Yes - -
Impact B+ 2% - - -
dewalt评分稍微低了一点点,估计丢的主要是重量分，1KG。 而hitachi是0.8KG优势还是，力量，速度，transmission。我觉得最贴心的是有Belt holder,这样可以挂在腰上到处溜达，对我而言，这俩算是平手
http://www.cordless-drill-reviews.com/dewalt-dcf815s2.html
DeWalt DCF815S2 Strengths & Weaknesses:
Design Balance Acceptable - While this driver has one or more design features that received a C rating, it can still be a good choice if that area is not critical to your particular needs.
Power Below Average Power - Delivers up to 950 in-lbs of torque, about 3% less than the class average. Power can sometimes be traded for weight or cost.
Speed Below Average Speed - Generates up to 2450 RPM, about 1% slower than the average impact driver. The DeWalt DCF815S2 ranks in the bottom 30% of its class for speed.
Weight √ Light-Weight - Weighs only 2.3 lbs, about 20% lighter than the average impact driver. Ranks in the top 30% of its class for being light-weight.
Battery Below Average Run-Time - Battery endurance is adequate for many work applications, but is 26% less than the class average. Uses Li-ion batteries with a charge rating of 1.3 Ah.
Impact √ High Impact Rate - Delivers up to 3400 IPM of blows, about 15% higher than the average impact driver. Ranks in the top 1% of its class for impact rate.
User Reviews √ Highly Satisfied Users - Rated 4.8 of 5 stars by 28 users. Most owners are very satisfied with the performance and value of this impact driver and would recommend it to others.
Power Ratio √ High Power-to-Weight - Ranks in the top 9% of its class for power-to-weight ratio, about 18% higher than average. Higher power-to-weight indicates an efficient design.
Gearbox Nylon Gears - Transmission includes at least some nylon gears that may need replacing after years of extended use. A nylon gearbox helps reduce driver weight.
Motor Brushes No External Access - The motor brushes can only be accessed internally by taking the driver apart. While not a common problem, external access makes the replacement job much easier.
Warranty √ Longer Warranty - Backed by DeWalt's limited 3-year warranty. This provides extra protection against potential design defects or premature part failure.
Charger Standard Charge Time - The DeWalt DCF815S2 battery charger takes 40 minutes to recharge a battery. Longer charge times are not a big issue if you always have a battery back-up.
Belt Hook √ Belt Hook - Handy feature that allows you to temporarily hang the driver from your belt or a ladder while you're performing other tasks.
Work Light √ Work Light - Contains an integrated LED work light that illuminates your work area and allows you to clearly see your driving position and progress.
Fuel Gauge No Fuel Gauge - Does not come equipped with a handy battery charge indicator that allows you to glance at your driver and check the battery life while you're working.
[ 本帖最后由 kevinfeng86 于 2011-9-30 12:04 编辑 ] |
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[Karen's 西點時光] 一組Dessert 的擺盤習作 (2008-8-12) Tiger_Karen 
楼主:iamwhoami
发表于 2011-9-28 23:56
