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Secoroc QLX 40 Down the Hole Hammer

QLX 40 - The Latest in High Performance 4" DTH Hammers

Secoroc QLX 40 hammerThe new Secoroc QLX 40 DTH hammer is the latest in the comprehensive line of QLX hammers. They represent the latest technology available on the market today by offering unbeatable capability, productivity, and reliability in deep hole drilling.

QLX hammers are optimized for deep hole drilling applications in hard rock. At operating pressures up to 508 psi and a further improved QL™ air cycle, the QLX 40 hammer can drill faster and deeper than any other hammer of its size.

The Secoroc QLX 40 is a 4" hammer that suits the water well and geothermal markets perfectly. The QLX 40 hammer is designed to operate in deep hole conditions, with heavy water influx and severe back pressure. This means optimum performance regarding productivity and reliability in deep hole conditions.

The QLX 40 12-spline bit shank maximizes the life of both the drive chuck and the bit splines. The shrink-fit inner cylinder reduces the number of internal moving parts and increases reliability. Add to that the new reliable check valve, and the QLX 40 is well protected from water and dirt entering the hammer.

The Secoroc QLX 40 can drill holes from 4 15/16" to 5 1/8" and is the ideal product for drilling contractors looking for the best total economy of their drilling operations.

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QLX 40 cutaway

QLX 40 DTH Hammer Specifications
  1. Simple and reliable check valve means good deep hole sealing.
  2. Valve-operated drive provides increased and consistent performance at depths, against heavy back pressure.
  3. Shrink-fit inner cylinder means no springs or shims.
  4. Heavy piston provides highest percussion energy.
  5. New QLX 40 12-spline bit -- + 19% more anvil area than DHD 340A, + 8% more anvil area than QL 40.

General Specifications
 
Air Consumption and Impact Frequency
Backhead thread (excl. pin-pin sub)
2 3/8" API Reg Pin
Air Pressure
scfm
bpm**
Bit shank
QLX 40
100 psi
207
1165
Outside diameter
4"
150 psi
297
1320
Length w/o bit shoulder to shoulder
35.3"
200 psi
383
1486
Weight w/o bit
101.4 lbs.
250 psi
480
1618
Backhead across flats
3"
300 psi
598
1710
Recommended minimum bit size
4.5"
350 psi
727
1835
Recommended maximum bit size
5.125"
400 psi*
831
2057
Bore
3.13"
450 psi*
947
2254
Piston weight
21.8 lbs.
500 psi*
1063
2449
Stroke
4"
  *Estimated value
**Blows per minute
Maximum pressure differential
508 psi
Make-up torque
4000 ft-lb.

Operational Specifications
Feed Force
2000 - 3000 lbs.
Rotation Speed
60 - 90 rpm


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Secoroc QLX 40 Down the Hole Hammer

QLX 40 Down the Hole Hammer part breakdown

Ref.
Part
 
Wear Limits
1
Exhaust tube Chuck
Min. Length
1.85"
2
Chuck Casing, backhead end
Min. OD
3.66"
3
Bit retaining ring assembly including O-ring Casing, chuck end
Min. OD
3.58"
4
O-ring* (bit retaining ring) Bit bearing
Max. ID
2.068"
5
Bit bearing Piston/Casing clearance
Max.
0.011"
6
O-ring* (bit bearing) Piston/Inner cylinder clearance
Max.
0.011"
7
Casing assembly including inner cylinder Exhaust tube protrusion
Max.
2.32"
8
Piston  
9
Inner cylinder*
Hammers and Kits
10
Valve assembly including O-rings
  • QLX 40 complete, 2 3/8" API Reg Box includes
    pin-pin adapter
  • O-ring kit includes 3x4, 1x6, 1x11, 1x12, 1x13,
    1x17
11
O-ring* (valve)
12
O-ring* (valve)
13
O-ring* (backhead)
14
Backhead assembly including O-ring
15
Check valve spring
Accessories
16
Check valve
  • Breakout washer
17
Check valve seat
18
Adapter 2 3/8" API Reg Pin-Pin *Not supplied separately