Drill Rods SPT For Site Investigation

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2021年12月05日

Wireline Drill Rods BQ NQ HQ PQ 5ft, 10ft length for exploration diamond core drilling

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DTH Drill Rods And RC Drill Rods

Drill Rods SPT For Site Investigation


We supplies a range of superior quality drill rods manufactured for the down-the-hole (DTH) and reverse circulation (RC) industry. It is made from either schedule 40 or schedule 80 material depending on the application. We also supply a range of Remet and Metzke RC rods, all made with BQ inner tubes.


Roschen group limited 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.





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 



Technical Specification 


Outside Diameter2 3/8in. 60.3mm
Straightness1: 1200 (Better than BS 1377 Requirements)
Spanner Flats1 7/8in. A/F. (47.6mm) Both Ends
StiffnessBetter than BW Rod to BS 4019
WeightLess than 9kg / Metre



Material Properties
Tensile Strength620 N/mm²700 N/mm²
Yield Stress525 N/mm²495 N/mm²
Elongation12%15%
The above material specification complies with the requirements of BS 4019: Parts 3 & 4 and ISO 3551: 1992




Part numbers
3 MetresRS 05470
1.5 MetresRS 05471
0.75 MetresRS 05472
0.50 MetresRS 05473
If you require any further information or a bespoke design then please email or contact us.


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