Product Main

Specifications

I. Characteristics
Self-drilling hollow anchor bar consists of six parts, namely, hollow drilling bolt, drilling bit, slip stop plug, anchor coupler, anchor plate and nut. The drilling bit is made of abrasion resistant steel alloy. Various kinds of drilling bits, single line type, cross type, taper etc. are able to meet different stratums. Hollow bolt is made of seamless tubes of high tensile steel alloy. With a high and new technology, it integrates functions drilling, grouting and anchoring at one time.
 
Self drilling hollow anchor bar is widely used in tunnel presupport, slope and roadbed reinforcement, and tunnel disease treatment as an efficient anchoring means, providing the optimal solution for railing, bolting, micro piling and as ground anchors in different ground and rock conditions.
 
Sizes available:
R25N, R32N,R32S, R38N,R51N,R51L,T76N,T76S
 
Various drill bits available for different rock formations:
Cross bits, Button Bits, Steel arched Bits, Steel 3 Cutter Bit

II.Products specifications and types

  Outside diameter Average internal diameter Effective external diameter Aver.eff. cross sectional area Ultimate load capacity Yield load capacity Average tensile strength Rm Average yield strength Rp0,2 TheoricaI weight Thread type
  mm mm mm mm2 Kn Kn N/mm2 N/mm2 kg/m  
R25N 25 14 23 244 210 150 805 660 2.4 ISO 10208
R32N 32 18.5 29.1 396 280 230 720 560 3.4
R32S 32 15 29.1 488 360 280 740 570 4.1
R38N 38 19 35.7 717 500 400 700 540 6.5
R51L 51 36 47.8 776 550 450 690 580 7.8
R51N 51 33 47.8 939 800 630 840 670 9.8 ISO 1720
T76N  76  51  76  1835  1600  1200  880   660 15.0 
T76S  76  45  76   2400 1900  1500  790  630  19.7 
Anchor plate 120mmx120mmx6mm 150mmx150mmx8mm 200mmx200mmx10mm
Anchor nut SW41xH35 SW46xH45 SW65xH55
Anchor coupling D35xl150 D41xL160 D55xL170 D64xL120
Drill bit According to different condition,choose alloy,steel…bit
Partspicture