DRILLWELL LTD have designed and manufactured a circular section Drill Rod for special applications, they are ideal for use in Standard Penetration Testing Operations. Our newly designed circular Rod fulfills the requirements of British Standards BS 1377: Part: 1990.

With the S.P.T Drill Rod tapered thread design and friction welded construction it provides maximum stiffness and a more rigid threaded joint coupled with reliability, durability and optimum field performance. The tube element is manufactured from cold drawn seamless steel tubing and the end pieces from heat treated alloy steel.

Drillwell Ltd - Site Investigation - S.P.T Drill Rods

Below is our Site Investigation Product range, if you require a bespoke design then please email or contact us.

Site Investigation Product Range

Sampling & Standard Penetration Test - S.P.T Drill Rod - Drillwell Ltd

Advantages Of Taper Threaded S.P.T Drill Rods

  • Stronger then parallel threading due to maximum threaded material disposition under critical area of pin thread.
  • Easier and faster to make and break joints than with parallel threaded Rod
  • Less chance of thread gauling
  • Spanner flats for safer Rod breaking
  • More rigid threaded joint than parallel BW Rods
  • Less chance of “Cross threading”
  • Reduced chance of box thread belling
  • Dual purpose means it can be used for some rotary drilling operations

  Outside Diameter

2 3/8in.          60.3mm

  Straightness

1: 1200 (Better than BS 1377 Requirements)

  Spanner Flats

1 7/8in. A/F. (47.6mm) Both Ends

  Stiffness

Better than BW Rod to BS 4019

  Weight

Less than 9kg / Metre

Technical Specification

  3 Metres

DW 05470

  1.5 Metres

DW 05471

  0.75 Metres

DW 05472

  0.50 Metres

DW 0573

Material Properties

 

Tube

End Pieces

  Tensile Strength

620 N/mm²

700 N/mm²

  Yield Stress

525 N/mm²

495 N/mm²

  Elongation

12%

15%

Part numbers

The above material specification complies with the requirements of BS 4019: Parts 3 & 4 and ISO 3551: 1992

DRILLWELL LTD

Comprehensive Drill Design and Supply Company

Drillwell Ltd
Unit 1-2, Rotherham Close
Killamarsh, Sheffield, S21 2JU
Tel No: 0114 2487333

Comprehensive Drill Design and Supply Company  - Drillwell Ltd
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