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LPR and HPR series

LPR friction-welded drill rods 67 – 140 mm
LPR rods are friction welded, specially hardened and made of the highest steel quality. The advantage of friction welding is that different steel qualities can be chosen for the mid-body and the ends, combining a high quality alloy steel for the ends, increasing the strength in the threads where it is required, with a light and thin material in between. LPR rods have a special surface hardening on the ends, giving good wear resistance and swift and easy joining. The rods have 4 spanner flats on each pin and box end. Thread protectors are available as an optional extra. The rods can be used both for DTH hammer and for rotary drilling.

 

HPR large diameter drill rods 168 – 273 mm
HPR rods have threaded ends which are shrink-welded onto a heavier wall tube section. The ends are manufactured from alloy steel and specially hardened for good wear resistance. These rods are suitable for both DTH hammer and rotary drilling.

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Product Description

LPR friction-welded drill rods 67 – 140 mm
LPR rods are friction welded, specially hardened and made of the highest steel quality. The advantage of friction welding is that different steel qualities can be chosen for the mid-body and the ends, combining a high quality alloy steel for the ends, increasing the strength in the threads where it is required, with a light and thin material in between. LPR rods have a special surface hardening on the ends, giving good wear resistance and swift and easy joining. The rods have 4 spanner flats on each pin and box end. Thread protectors are available as an optional extra. The rods can be used both for DTH hammer and for rotary drilling.

Rod TypeRod O.D. inch (mm)Thread TypeEnds I. D. (mm)Across Flat (mm)
LPR-672 5/8" (66.7) NWY3257
LPR-76 3" (76.2)2 3/8 API Reg3060
LPR-89 3 1/2" (88.9)2 3/8 API Reg3065
LPR-89 3 1/2" (88.9)2 7/8 API Reg3065
LPR-893 1/2" (88.9)2 3/8 API I.F.3065
LPR-102 4" (101.6)2 3/8 API I.F.3070
LPR-1144 1/2" (114.3)3 1/2 API Reg4289
LPR-1144 1/2" (114.3)2 7/8 API I.F.5489
LPR-1275" (127.0)3 1/2 API I.F.6895
LPR-1405 1/2" (139.7)4 1/2 API Reg57110

Standard lengths are 0.5, 1.0, 1.5, 2.0 & 3.0 m. Alternative lengths, diameters and thread forms available on request. Minimum order quantity may apply to selected types.

HPR large diameter drill rods 168 – 273 mm
HPR rods have threaded ends which are shrink-welded onto a heavier wall tube section. The ends are manufactured from alloy steel and specially hardened for good wear resistance. These rods are suitable for both DTH hammer and rotary drilling.

Rod TypeRod O.D. inch (mm)Thread TypeEnds I.D. (mm)Across Flat (mm)
HPR-1686 5/8" (168.3)41/2 API I.F.95127
HPR-1947 5/8" (193.7)6 5/8 API Reg90140
HPR-2208 5/8" (219.1)6 5/8 API Reg90178
HPR-27310 3/4" (273.0)8 5/8 API Reg121200

Standard lengths are 1.5 & 3.0 m. Alternative lengths, diameters and thread forms available on request. Minimum order quantity may apply to selected

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