DeWalt DCF899N-XJ 18V Li-Ion XR Brushless Cordless… (3399J)

£ 159.98INC VAT

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DeWalt DCF899N-XJ 18V Li-Ion XR Brushless Cordless Impact Wrench - Bare (3399J)

Powerful and efficient, high torque wrench. Features a comfortable rubber grip and switch for comfort and maximum control. Bright white LED light with delay feature for improved visibility and flashlight functionality. Capable of 1625Nm of breakaway torque for removal of the tightest bolts.

  • Max. Torque: 950Nm
  • ½" Square Drive Detent Pin
  • 3-Speed Variable
  • All-Metal Gearing
  • Manual Friction Brake
  • Rubber-Grip Handle
  • LED Work Light
  • Brushless Motor
  • Fan-Cooled Motor
  • Does Not Include Battery or Charger

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View all: DeWalt Impact Drivers & Wrenches

£159.98INC VAT

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Rated 5 out of 5 by from impact driver this thing is a beast, lorry wheel nuts are no problem at all. Wish I had had one years ago.
Date published: 2022-04-14
Rated 5 out of 5 by from Dewalt Impact wrench DCF899 Rusted seized bolts no problem. No room to pull a breaker bar to crack a bolt on a steering arm so bought this beast and no problems for it. Ive promised myself one foe a while but price put me off. 3 hours trying everything to get them bolts off and the tbe dewalt did it in 20 secs. Im am so pleased to gave this now in my armoury and the tbe 2 4amp batteries i got with my drill kept the price down.
Date published: 2022-04-02
Rated 5 out of 5 by from Great wrench Very good powerful wrench. A bit on the heavy side especially with a 5 or 6ah battery but worth it. I feel that it could come with a solid box rather than a cardboard one.Even if it’s just a bare wrench without battery or charger, a storage box to keep it safe in wouldn’t hurt.
Date published: 2022-03-17
Rated 5 out of 5 by from second one I am buying As an agricultural mechanic, I am used to having plenty of bolts big enough to crack (used on bolts from m8/13mm-head to m22/32mm-head) all week long. Let's say that impact gun will not get its best performance with cold (<7°C), too hot temperatures, discharged, with faulty or too small batteries. It's been more than 3 years that i am using the previous one and now, i got to renew it not for loss of torque but mainly for erratic behavior that brings to under-tightening or sheering of bolts. (i think it doesn't arrive to recognize in which speed it is anymore). It was a perfect fit for my needs, it gives enough torque without being insane for most of the job (I was not using it just for breaking bolts but also for tightening, so not too much power allows you to insist a little bit more to get the torque you are looking for in speed 2 or 3 mainly). It will not break overtighten/completely rusty-bolts bigger than m16/24 head. By experience, that impact gun might look big and heavy but it needs that weight to avoid fatigue from vibrations when hammering on hard bolts. I would always prefer using 5ah batteries in the right temperature range and in good condition: (meaning they are made of 5x2 cells in parallel, due to the vibrations or previous use or misuse, some cells could get defective or the welds in the batteries gets broken. That makes you lose all power output on your battery. Especially due to the fact that impact gun "shakes" your battery when in use making it lose any power it could produce while hammering, A thing that you notice less with a drill. Also, what brings you the "breaking power " is the fact your gun spin really fast, so any damaged battery or small battery will loose voltage fast and the gun will have no go... Last thing: the detent pin system works better in the long run to hold the sockets.
Date published: 2022-01-30
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Can you put a standard screwdriver holder bit into the impact wrench.

Asked by: Jveck
No this impact wrench wouldn't be suitable for being used as a screwdriver.
Answered by: DEWALT Product Expert
Date published: 2022-06-27

Will this still reach maximum torque with an 18V 3AH battery?

Asked by: Gaz24601
yes, but runtime will be quite low at max capacities, 5ah is recommended.
Answered by: DEWALT Product Expert
Date published: 2021-10-08

Bolt capacity.

What is the maximum bolt capacity of this model please?
Asked by: GBroad
Answered by: SBD_UK Team
Date published: 2021-06-21

which battery does it need, is there a model number?

Asked by: fadsfasfasdfasdfa
all DeWalt 18v XR batteries are compatible
Answered by: SBD_UK Team
Date published: 2022-06-22

can you use a 18v 1.5AH battery with this impact wrench

Asked by: 1harley1700
yes, however the runtime will be low, a higher a/h battery is recommended.
Answered by: SBD_UK Team
Date published: 2021-03-22
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Bare Unit Product Type Impact Wrenches
Battery Chemistry Li-Ion
Battery Technology XR
Bolt Capacity M20
Brand DeWalt
Brushless Brushless
Carry Case/Bag Included No
Chuck Capacity ½"
Chuck Type Square Drive Detent Pin
Condition Brand New
Condition Description Unused & in original factory/manufacturer condition.
Impact Rate 0-2400 bpm
Manufacturer Guarantee 3 Year Manufacturer’s Guarantee (Registration Required, T&Cs Apply)
Max Torque 950 Nm
Model No DCF899N-XJ
No. of Batteries Per Pack None
No Load Speed 0-2400ipm. 0-400/1200/1900 rpm
Pack Size 1
Pieces in Pack/Case 1
Power Supply Cordless
Power Voltage Supply 18 V
Product Length 224 mm
Product Type Impact Wrench
Tool Weight without Battery 2.6 kg


Instruction Manual