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Black and white illustration of the hammer

Download the Data sheet as PDF-file:

Basic information - W280 (12")

Hole size Ø 305 / 311 mm (12” / 12.28”)
Water consumption
1 200 l/min at 100 bar
Max operating pressure
150 bar (2 175 psi)



 

The Wassara technology uses water to power the DTH hammer. This makes it the ideal choice for drilling in sensitive areas as well as for drilling long straight holes. The water-powered hammer is capable of penetrating almost any formation while maintaining speed and accuracy.

Technical specification
Tech spec bild W280sv.jpg

W280 Hammer

Length A

2 540 mm (100”)

Length B

2 413 mm (95”)

Diameter C

240 mm (9.45”)

Size D

240 mm (9.45”)

Weight

915 kg (2 017 lbs)

Bit diameter

Ø 305 / 311 mm (12” / 12.28”)

Operating pressure interval

50 - 150 bar (725 - 2 175 psi)

Water consumption interval

1 200 l/min at 100 bar

Frequency at maximum operating pressure

30 Hz (1 800 blows/min)

Feed force, formation dependant

60 – 120 kN

Rotation speed, formation dependant

25 - 50 rpm

Drill rod

273x12,5 mm (11”) Thread API 6 5/8 REG

Recommended water pump

2 pcs WASP200D 800 l/min (211 USgpm) @160 bar (2 320 psi)

Bit shank

Numa 125

 



 

Sprängskiss W280_2.jpg

W280 Hammer sizes

Hammer diameter Part no.
Ø 285 mm 1500590-285


 

W280 Parts list

Pos Detail Part no
  Hammer W280, Ø 285 mm
1500590-285
1 Drill bit
Drive plates
Chuck bushing
Numa shaft
1500543
1003239
2 Chuck (incl. chuck bushing) 1500587
3 Bit retainer 1500478
4 Seal kit 1003190
5 Shims (chuck-end) 1501445
6 Hammer case 1501923
7 Piston bushing 1500584
8 Inner tube 1500581
9 Piston 1500588
10 House retainer 1501838
11 House retainer ring 1501839
12 Sliding case 1501216
13 Valve house 1500582
14 Valve 1500589
15 Sleeve 1501195
16 Lid 1500585
17 Check valve shutter guide 1501344
18 Check valve spring 1002624
19 Check valve shutter 1501343
20 Filter support 1500496
21 Filter 1500497
22 Shims (backhead-end) 1501190
23 Backhead 6 5/8 API Reg 1500499

 

Drill site in city enviorment

Pile-drilling in central Stockholm with W280

A busy traffic junction in central Stockholm, Sweden is under re-construction. The contractor carefully needed to choose the right drilling techniques. Wassara’s newest and largest water-powered 12” hammer W280 was successfully tested in a pile-drilling application.

Read the full version here!