IBO Bolt &
Accessories.
The IBO Bolt drills, anchors and grouts in a single step, providing safe reinforcement in tunnels and weak ground. The system works as a complete set with 7 accessories: Button Bit, Cross Bit, Diamond Bit, Coupler, Nut, Plate and Centraliser.
- High Intent 01 Request a Quote A fast quote with diameter, length, quantity and delivery country. Same-day reply.
- Catalogue 02 Brochure/Sheet The tunnel equipment catalogue and product sheets are in Resources.
- Factory 03 Plant Visit Inspect our Kahramankazan/Ankara production line on site or via an online tour.
Applications
Which projects use the IBO Bolt?
The IBO bolt is used in many areas such as reinforcing weak ground in tunnels, tunnel face reinforcement, tunnel foot piles and portal reinforcement. It also reinforces tunnel portals, trenches, cut-and-cover areas, excavation roads, dams and slopes, as well as retaining walls and noise barriers.
Working principle & features
One operation for challenging ground.
The IBO (self-drilling) bolt system consists of a hollow, externally threaded bolt and a bit that does the drilling. Anchoring and grouting are done in a single operation. During drilling, air and water flow freely through the hollow bolt to flush out cuttings, and grouting can start as soon as drilling ends. The grout completely fills the bolt and the gap between the rock and the bolt.
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Tunnel
Button Bit
A drill bit used in top hammer drilling for tunnel and mine excavation and for drilling rock bolt holes. Tungsten carbide buttons set into a heat-treated steel body transfer impact energy to the rock and break it. The bit rotates slightly after each blow, so the buttons strike a fresh point on the rock and advance the hole. Flushing holes and channels help clear the cuttings from the hole. Spherical or ballistic button geometry and face design are selected according to rock strength, abrasiveness and fracturing. Produced in a range of diameters with R32, T38 and T45 thread connections; the bit is matched to the hole diameter and drill string.
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Tunnel
Cross Bit
Four-wing cross bit with tungsten carbide inserts, giving straight holes and steady penetration in fractured, medium-hard rock. Continuous cutting edges sweep the hole bottom without gaps, keeping the bit on line through fractures. The central port delivers water, air or grout to clear cuttings. On self-drilling anchors (SDA) it is fitted to the bar tip and remains in the hole as a sacrificial bit. In very hard, abrasive rock a button bit is preferred, and in clay or loose ground a clay bit.
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Tunnel
PCD Button Bit
Button bit with ballistic (pointed) tungsten carbide buttons, giving a higher penetration rate than spherical buttons in medium-hard, low-abrasive rock. The pointed profile penetrates deeper and concentrates impact energy on a smaller area. Side flushing grooves clear cuttings quickly. In very hard, abrasive rock, where ballistic buttons wear faster, a spherical button bit is preferred. Used for tunnel face drilling, rock bolt holes and self-drilling anchors (SDA).
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Tunnel
SDA Coupler
Coupler that joins self-drilling anchor (SDA) bars to extend the anchor to the required length, rated to match the ultimate load of the bar. It is cut and threaded from seamless tube produced from steel billet in our rolling mill, so every step from raw material to finished part is traceable. Bars enter the coupler to equal depth from both ends, giving full thread engagement on each side. Load capacity is verified by tensile testing. Available in R25–R38 and T38–T51 threads, in lengths of 150–225 mm. Made in the same plant as the bar and nut, so it does not reduce the load capacity of the anchor system.
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Tunnel
Nut
Hex nut for self-drilling anchors (SDA) that locks the plate to the bar and transfers load into it, rated to match the ultimate load of the bar. Its spherical seat, used with a dome plate, keeps the load on axis when the anchor is installed at an angle. Made for R32 to R51 threads in the same plant as the bar and coupler.
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Tunnel
Bearing Plate
Domed bearing plate that spreads anchor load over the rock or shotcrete surface, rated to match the ultimate load of the bar. The pressed dome stiffens the plate. Used with a spherical nut, it keeps the load on axis when the anchor is installed at an angle. Flattening of the dome under overload gives a visible warning on site. Compatible with self-drilling anchors (SDA) and SN rock bolts, made in the same plant as the bar, nut and coupler.
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Tunnel
Centraliser
The FATE Engineering Centraliser keeps IBO Bolts centred during drilling and grouting for safe and efficient anchoring.
Technical data
IBO Bolt models & technical data.
10 standard models in the catalogue. Tensile strength from 250 kN to 800 kN. R32, R38 and R51 thread options.
| Model | Outer Dia. (mm) | Inner Dia. (mm) | Cross Section (mm²) | Tensile Str. (kN) | Yield Str. (kN) | Weight (kg/m) |
|---|---|---|---|---|---|---|
| R32-L | 32,00 | 19,50 | 380 | 250 | 190 | 3,10 |
| R32-N | 32,00 | 18,50 | 430 | 280 | 230 | 3,40 |
| R32-S | 32,00 | 15,00 | 520 | 360 | 280 | 4,10 |
| R32-SS | 32,00 | 13,00 | 560 | 400 | 330 | 4,50 |
| R38-L | 38,00 | 21,00 | 635 | 430 | 350 | 5,50 |
| R38-N | 38,00 | 18,50 | 760 | 500 | 400 | 6,00 |
| R38-S | 38,00 | 16,50 | 800 | 550 | 450 | 6,50 |
| R51-L | 51,00 | 33,50 | 850 | 550 | 450 | 7,00 |
| R51-N | 51,00 | 32,50 | 970 | 660 | 540 | 8,40 |
| R51-S | 51,00 | 29,00 | 1.140 | 800 | 630 | 9,00 |
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Steel Grade 01
ISO 10208
Standard steel grade for all models.
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Length 02
3-6 m
R32: 3, 4 & 6 m · R38, R51: 3 & 4 m
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Material 03
Seamless Steel Tube
Made from cold-worked seamless steel tube.
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Application 04
Roads, railways, tunnels, mines, dams
Related products
Frequently used with the IBO Bolt.
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Tunnel
Button Bit
A drill bit used in top hammer drilling for tunnel and mine excavation and for drilling rock bolt holes. Tungsten carbide buttons set into a heat-treated steel body transfer impact energy to the rock and break it. The bit rotates slightly after each blow, so the buttons strike a fresh point on the rock and advance the hole. Flushing holes and channels help clear the cuttings from the hole. Spherical or ballistic button geometry and face design are selected according to rock strength, abrasiveness and fracturing. Produced in a range of diameters with R32, T38 and T45 thread connections; the bit is matched to the hole diameter and drill string.
-
Tunnel
PCD Button Bit
Button bit with ballistic (pointed) tungsten carbide buttons, giving a higher penetration rate than spherical buttons in medium-hard, low-abrasive rock. The pointed profile penetrates deeper and concentrates impact energy on a smaller area. Side flushing grooves clear cuttings quickly. In very hard, abrasive rock, where ballistic buttons wear faster, a spherical button bit is preferred. Used for tunnel face drilling, rock bolt holes and self-drilling anchors (SDA).
-
Tunnel
SDA Coupler
Coupler that joins self-drilling anchor (SDA) bars to extend the anchor to the required length, rated to match the ultimate load of the bar. It is cut and threaded from seamless tube produced from steel billet in our rolling mill, so every step from raw material to finished part is traceable. Bars enter the coupler to equal depth from both ends, giving full thread engagement on each side. Load capacity is verified by tensile testing. Available in R25–R38 and T38–T51 threads, in lengths of 150–225 mm. Made in the same plant as the bar and nut, so it does not reduce the load capacity of the anchor system.
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Tunnel
Nut
Hex nut for self-drilling anchors (SDA) that locks the plate to the bar and transfers load into it, rated to match the ultimate load of the bar. Its spherical seat, used with a dome plate, keeps the load on axis when the anchor is installed at an angle. Made for R32 to R51 threads in the same plant as the bar and coupler.
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Tunnel
Cross Bit
Four-wing cross bit with tungsten carbide inserts, giving straight holes and steady penetration in fractured, medium-hard rock. Continuous cutting edges sweep the hole bottom without gaps, keeping the bit on line through fractures. The central port delivers water, air or grout to clear cuttings. On self-drilling anchors (SDA) it is fitted to the bar tip and remains in the hole as a sacrificial bit. In very hard, abrasive rock a button bit is preferred, and in clay or loose ground a clay bit.
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Tunnel
Centraliser
The FATE Engineering Centraliser keeps IBO Bolts centred during drilling and grouting for safe and efficient anchoring.
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