ケー・エフ・シー List of Products and Services

The "IBO Lock Bolt" is a hollow lock bolt with R32 threads rolled along its entire length, making it very easy to handle on-site. It is effective not only as a self-drilling bolt but also as an injection bolt utilizing its hollow structure. It can be applied to a wide range of uses, including pattern bolts, fore-poling, tunnel repairs, LW urethane, and slope reinforcement. 【Features】 ■ R32 rope threads rolled along the entire length ■ Ensures slime discharge performance and stable adhesion performance ■ Allows simultaneous drilling and bolt insertion operations, reducing cycle time ■ Pursues cost-effectiveness through bit selection according to the target geological conditions ■ Applicable to a wide range of uses *For more details, please refer to the PDF document or feel free to contact us.

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"IBO Dry Mortar" is a mortar developed primarily for filling IBO anchors (post-grouting rock bolts), characterized by its early strength and adhesion. It contains special additives, and when mixed with the specified amount of water, it can be smoothly injected through the hollow part of the injection bolt. Additionally, due to its good fluidity, it excels in filling cracks and voids in the surrounding rock. 【Features】 ■ High-quality mortar can be mixed simply by adding the specified amount of water. ■ Combines fluidity and adhesion, resulting in properties suitable for construction. ■ Formulated for compatibility with MAI pumps. *For more details, please refer to the PDF document or feel free to contact us.

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"SN Dry Mortar" is a high-performance mortar suitable for pre-filling applications. Developed as a mortar for pre-filling, it is generally formulated to be suitable for the installation of rock bolts and similar applications. When mixed with the specified amount of water, it has a soft and sticky consistency, making it difficult to flow out even when filled into upward boreholes, while also demonstrating sufficient initial strength. 【Features】 ■ High-quality mortar can be mixed simply by using the specified amount of water. ■ Combines fluidity and stickiness, resulting in properties suitable for construction. ■ Formulated for use with MAI pumps. ■ Standard mixing yield: approximately 10L/bag. *For more details, please refer to the PDF materials or feel free to contact us.

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"CT Mortar" is a fast-setting, expanding type of premixed mortar developed for the post-filling injection of rock bolts. Its main purpose is to securely anchor rock bolts to the surrounding rock mass, while also filling voids and cracks caused by loosening around the borehole, thereby enhancing the reinforcement effect by rapidly developing strength. 【Features】 ■ Can compensate for filling defects (voids) through volume expansion ■ In weak rock masses with low adhesion, improves adhesion by applying pressure during injection and additionally compressing the borehole wall through volume expansion ■ The mortar filled in the borehole and cracks expands, compacting the surrounding rock mass and increasing its shear strength ■ Good workability and easy handling *For more details, please refer to the PDF document or feel free to contact us.

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The "CT Bolt" is a combined type rock bolt that is temporarily installed and later permanently secured with grout. It allows for quick and easy installation, and various viscosities of grout can be easily injected and filled, while the polyethylene sleeve protects the bolt from corrosion. Manual installation is possible, and automated installation using a specially developed rock bolt setter is also feasible. 【Features】 ■ Combined type rock bolt ■ Quick and easy installation ■ Easy injection and filling of various viscosities of grout ■ Special hemispherical dome head ■ Unique anti-corrosion structure *For more details, please refer to the PDF document or feel free to contact us.

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The "Me Method" is a small-diameter long steel pipe face reinforcement technique applied in weak ground conditions such as at the portal and in unconsolidated ground during mountain tunnel excavation. By enlarging the connection section, it enhances the strength of the threaded part, allowing for the use of small-diameter thin-walled steel pipes (φ76.3×4.2mm), which improves economic efficiency and workability due to weight reduction. Additionally, "Me-fix" aims to improve the adhesion strength, which has been a weakness of previous steel pipe face reinforcement methods, ensuring reliable ground confinement. 【Features】 ■ Recycling of steel materials through separate collection ■ Thinning of steel pipes through enlarged connection sections (socket method) ■ Improved adhesion strength of long steel pipe face reinforcement *For more details, please refer to the PDF materials or feel free to contact us.

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The "AGF-Me (Metal eco) method" is a patented method (Patent No. 3882118) for a non-widening long steel pipe advance construction technique. It features vertical slits in the terminal reinforcement steel pipes of the cutting section during tunnel excavation with non-widening support, allowing for the separate recovery of the steel pipes and injected materials during excavation. This method eliminates unnecessary mixed waste and enables resource utilization as sorted waste. 【Features】 ■ Patent No. 3882118 obtained ■ Structure allows for separate recovery of steel pipes and injected materials during excavation ■ Eliminates unnecessary mixed waste and enables resource utilization as sorted waste *For more details, please refer to the PDF document or feel free to contact us.

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We handle the tunnel excavation material "GFRP Rock Bolt." We offer the solid type "CG22S," which allows for nut attachment and connection via joint couplers, and the "CGR32," which utilizes its hollow section to inject anchoring materials or ground reinforcement materials. These products can be used for applications such as middle wall construction methods, face reinforcement bolts, and injection pipes for planned excavation areas. [Features (CG22S)] - Solid type fully threaded GFRP rock bolt - Allows for nut attachment and connection via joint couplers - Suitable for applications such as middle wall construction methods and advanced guide pile pattern bolts *For more details, please refer to the PDF materials or feel free to contact us.

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The "Super Spiral Bolt SP24" is a high-strength lock bolt that inherits the excellent features of the "SN Twist Bolt." It features a newly designed special rib and screw section that are formed simultaneously during the bar steel rolling process, ensuring there are no cross-sectional defects in the screw section and that it exhibits uniform strength throughout its entire length. 【Outstanding Characteristics】 ■ Utilizes high-strength material SD685, achieving a yield load of over 297 kN while being even lighter (3.4 kg/m) than the SN Twist Bolt. ■ By maintaining the same material diameter and reproducing the surface shape of the SN Twist Bolt, the insertion resistance is equivalent to that of the SN Twist Bolt. ■ In terms of ground deformation during the early age of the anchoring material, it has high adhesion toughness, making it less likely to experience adhesion failure, inheriting the excellent anchoring characteristics of the SN Twist Bolt. ■ The adoption of the special-shaped nut "S Nut" reduces the protrusion of the nut and bolt, eliminating the need for protective materials (caps/mats) for the head during waterproof sheet installation. *For more details, please refer to the PDF document or feel free to contact us.

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This product is a rock bolt that can be applied under high pressure conditions due to its high strength (290 kN capacity). The increase in strength allows for a reduction in the number of bolts, which improves construction speed. After installation, the anchoring force is secured instantly, contributing to rapid construction. Additionally, tightening with nuts and square washers is possible. 【Features】 ■ Applicable under high pressure conditions due to high strength (290 kN capacity) ■ Improvement in construction speed by reducing the number of bolts due to increased strength ■ Instant securing of anchoring force after installation contributes to rapid construction ■ Tightening with nuts and square washers is possible *For more details, please refer to the PDF document or feel free to contact us.

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"Q-Tight" is a paper tube-type adhesive anchor developed as a setting material for post-installed anchors used in construction and civil engineering, primarily composed of cement mortar. The installation of this product utilizes capsules containing high-performance non-shrink mortar housed in non-woven fabric, forming an anchor system that secures anchor bolts within the base material holes, achieving strength comparable to conventional resin-based anchors along with five key features. 【Five Key Features】 ■ Workability ■ Fire Resistance ■ Safety ■ Environmental Friendliness ■ Cost-effectiveness *For more details, please refer to the PDF document or feel free to contact us.

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The "Double X Anchor" is a threaded plug for ALC that has an independent screw section unrelated to the adhesion function, making it easy to screw in bolts. By simply tapping it lightly with a dedicated insertion tool, the eight claws will reliably protrude, providing a clear indication of adhesion, and the plug will be completely secured. The material used is nylon 66, reinforced with 15% glass fiber. It has excellent mechanical properties, allowing for safe use. 【Features】 - The screw section is independent of the adhesion function - Easy to screw in bolts - Clear indication of adhesion, and the plug is completely secured - Made of nylon 66, reinforced with 15% glass fiber - Superior mechanical properties *For more details, please refer to the PDF document or feel free to contact us.

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"SR Tight" is a capsule anchor based on inorganic adhesive, primarily focused on general construction work. Being capsule-shaped, it requires no weighing, mixing, or injection work, making installation easy. Simply immersing it in water allows for proper control of the water ratio, resulting in stable performance. Additionally, there is no shrinkage after curing, providing stable load-bearing capacity. It can be installed using either a driven type or a rotary-impact type. 【Features】 - Capsule shape allows for easy installation without weighing, mixing, or injection work. - Proper control of the water ratio is achieved by simply immersing it in water, resulting in stable performance. - No shrinkage after curing ensures stable load-bearing capacity. - Can be installed using either a driven type or a rotary-impact type. - Made with cement mortar, it is non-combustible and has excellent fire resistance. *For more details, please refer to the PDF document or feel free to contact us.

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The steel pipe expansion-type friction lock bolt has been adopted as a solution for tunnel construction projects under challenging ground conditions. Its weakness is the "uncertainty of lifespan" of the thin-walled steel pipe that is anchored in direct contact with the ground. This product addresses that weakness. The introduction of the steel pipe expansion-type friction lock bolt, which is expected to have a semi-permanent function. 【Features】 ■ Higher hardness and less prone to scratches compared to other galvanized coatings ■ No peeling of the coating layer due to expansion during construction ■ Exhibits excellent corrosion resistance under ground conditions with a pH of 4 to 12, maintaining reinforcement effects over the long term ■ Utilizes a new material with excellent elongation properties, exhibiting superior deformation characteristics *For more details, please refer to the PDF document or feel free to contact us.

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This product is suitable for conditions that require higher elasticity (when the rock bolt needs to function within the elastic range and reduce deformation in the excavation area more effectively). With the improvement of yield strength and fracture strength, the excellent features of "Suerex" can now be utilized under greater load conditions. The combination of material technology and Suerex bolt functionality enables reliable installation, support functions that are effective across the entire length of the bolt immediately after installation, and the ability to respond to harsh excavation conditions. 【Features】 ■ Quality can be verified with each installation ■ Safe and simple installation work ■ Provides support capacity as per specifications immediately after installation ■ Does not require harmful chemical products ■ Corrosion resistance suitable for long-term support ■ Not affected by vibrations from blasting ■ Reduction of working time is possible *For more details, please refer to the PDF materials or feel free to contact us.

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This product is a lock bolt made using high-strength deformed steel SD345 as specified in JIS G3112. It is processed with rolled metric threads based on JIS B0205. Additionally, the tip shape is conical. 【Features】 ■ Made with high-strength deformed steel SD345 as specified in JIS G3112 ■ Rolled metric threads based on JIS B0205 ■ Tip shape is conical *For more details, please refer to the PDF document or feel free to contact us.

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The "SN Twist Bolt" is a twisted rebar lock bolt that has been cold twisted from specially manufactured high-strength deformed steel bars to further enhance its strength. When this product is inserted into a borehole filled with mortar, the spiral ribs and lateral bumps rotate the mortar, improving insertability. As a result, it prevents the formation of voids behind the ribs and bumps, ensuring good adhesion along the entire length of the bolt. 【Features】 ■ Forms a surface shape that is easy to insert into boreholes filled with mortar ■ Effective in preventing the formation of voids between the mortar and the bolt ■ Adhesion performance with mortar is superior to that of deformed steel bars ■ Rolled threads based on JIS-B-0205 standard metric coarse threads *For more details, please refer to the PDF document or feel free to contact us.

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The "Chemical Anchor RQ Type" is a bonding-type post-installed anchor designed for low-temperature rapid curing. It demonstrates excellent curing performance even at low temperatures and cures within a few minutes at room temperature, making it suitable for continuous work such as anchor installation followed by hardware attachment. Additionally, it uses a modified vinyl ester resin that does not contain "styrene" as a raw material, eliminating the unpleasant styrene odor during application. 【Features】 ■ Measures against sick house syndrome (styrene-free raw materials) ■ Excellent curing performance ■ Glass tube type for safety *For more details, please refer to the PDF document or feel free to contact us.

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The "Q-Tight type-M" is an inorganic anchor that can be used for underwater construction. It allows for long-length construction underwater and can accommodate a bonding length of 15d or more. 【Features】 ■ A post-installed anchor made from a material that does not require on-site mixing or kneading, possessing properties similar to underwater non-separating concrete. ■ Compatible with rust-resistant rebar (resin-coated) for underwater use. *For more details, please refer to the PDF document or feel free to contact us.

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This product is a hex bolt that has two functions: preventing loosening and preventing falling. It uses a locking K nut. In the event that loosening occurs, the nut is stopped by the stepped section applied to the anchor screw part, providing a "fall prevention function." 【Features】 ■ Uses a locking K nut for the included nut to prevent loosening after tightening. ■ Even if the nut loosens, it will be stopped by the stepped section of the bolt body. ■ Allows for adjustment of the length under the head and processing into U-bolts. ■ Patent No. 3354910 *For more details, please refer to the PDF document or feel free to contact us.

• bolt

This product is a nut with a locking feature. The locking function is activated by a friction ring (leaf spring) attached to the top of the nut. It complies with tests based on NAS3350 and 3354. 【Features】 ■ Prevents loosening by strongly pressing the threads with the friction ring ■ No special tools required as it has the same handling as commercially available hex nuts ■ Complies with tests based on NAS3350 and 3354 ■ Stainless products are treated with a fluorine coating to prevent seizing *For more details, please refer to the PDF document or feel free to contact us.

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This product is a clip-on lock nut that can be installed from one side. The clip and K-nut are joined by six points of electric spot welding, allowing work in hard-to-reach areas and preventing the nut from falling off during operation. Additionally, stainless steel products are treated with a fluorine coating to prevent seizing. 【Features】 ■ The included K-nut has a locking function (compliant with NAS33530 and 3354 testing standards) ■ Prevents nut drop during operation ■ Seizing prevention measures with fluorine coating (for stainless steel products) *For more details, please refer to the PDF document or feel free to contact us.

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This product is a nut equipped with a double lock feature. By adding a K-lock (nylon coating) to the friction ring and threaded section, we have achieved a high-performance anti-loosening mechanism with the double lock feature. The anti-loosening test is compliant with the NAS3350 and 3354 standards. 【Features】 ■ Anti-loosening nylon coating ■ Safety measures ■ Vibration resistance *For more details, please refer to the PDF document or feel free to contact us.

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This product is a post-installed anchor with a locking function to prevent loosening. The K-lock function continues to prevent loosening even after repeated insertion of bolts. The loosening prevention test is compliant with the NAS3350 and 3354 standards. 【Features】 ■ Threaded anchor with loosening prevention function ■ Safety measures ■ Vibration measures *For more details, please refer to the PDF document or feel free to contact us.

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The "One-Site Bolt" is a bolt equipped with a locking nut that can be installed from one side. The nut uses a locking K nut, allowing installation without damaging the base material. We also offer the "Safety One-Site Bolt," which features double fall prevention measures. 【Features】 ■ Ease of installation ■ Safety measures ■ One-sided installation *For more details, please refer to the PDF document or feel free to contact us.

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The SR method is a construction technique that involves injecting filling material into the voids behind the lining of existing tunnels or behind concrete structures, thereby integrating the ground and the structure. It excels in limited injectability that meets the required quality for the filling material in the back voids. 【Construction Procedure】 Air mortar is prepared by mixing a mortar made of a specified amount of cement, filling material, and water with foam generated by a foaming machine. This air mortar and the plasticizer "SRP-L" are each pumped and injected into the void while being mixed together at the injection point.

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The RBS formwork method is a cavity injection technique that uses polyurethane-based injection materials developed for the purpose of filling tunnel voids and reinforcing existing tunnels by filling the cavities behind the lining concrete. The high filling capacity and permeability due to the unique foaming of polyurethane resin allow for the filling of voids. Additionally, it penetrates cracks in the lining concrete, providing a water-stopping effect.

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The Gain CF Sheet Method is a technique that involves applying carbon fiber sheets treated with a high-impregnation adhesive to concrete structures for the repair and reinforcement of tunnels. It has passed tests for "flammability, self-extinguishing properties, and safety of generated gases," making it suitable for use inside tunnels. Additionally, the sheets are treated for high impregnation, which, when combined with a specialized adhesive, provides excellent adhesion performance. This helps to prevent sheet peeling during construction, ensuring safe installation. There are two types of sheets with different weaving patterns: the "CR" type, primarily used for falling debris prevention, which weaves carbon fibers in both vertical and horizontal directions, and the "UD" type, used for reinforcement, which aligns carbon fibers in one direction. With the addition of the new UD300, which has a weight of 300g/m², alongside the existing UD200 and CR200 (both with a weight of 200g/m²), the application range of the Gain CF Sheet Method has expanded.

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The bolt itself has a function to prevent loosening. Even when tightened to a value approximately 20% lower than the traditionally recommended torque, it is designed to prevent loosening. The anti-loosening function has passed impact and vibration tests in accordance with NAS3350 and 3354 standards.

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We handle various types of post-installed anchors to meet diverse needs. Additionally, we excel in unique technological developments through design and construction using our own products. This catalog features our anchor products. Please feel free to consult us if you have any requests. *For more details, please download the PDF or contact our sales office.

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This is a new concept tunnel rock bolt that expands due to high water pressure and has a mechanism for securing itself to the surrounding rock. 【Features】 ★ Reliable construction without filling materials ★ It securely anchors to the surrounding rock using the expansion pressure of the steel pipe without using filling materials like mortar. Even in areas with water inflow, it anchors reliably without the influence of cement component leakage. ★ Speedy construction ★ No anchoring materials like mortar are needed, and it anchors simultaneously with construction, contributing to a shortened construction cycle and early strength development. ★ High corrosion-resistant rock bolt ★ The entire length of the bolt is treated with high corrosion-resistant plating, boasting high durability. This contributes to the long lifespan of tunnel structures. *For more details, please download the PDF or contact us.*

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This product is a metal anchor with an undercut design. Mechanical anchoring force is applied to the undercut section, reducing pull-out and slip. It demonstrates sufficient anchoring performance even with high-strength concrete. 【Features】 ■ Suitable for upward installation ■ High reliability as a hanging anchor ■ Material capable of complete anchoring in high-strength concrete with a strength of 60 N/mm² or more *For more details, please refer to the PDF document or feel free to contact us.

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- The anchor features a hole for passing wires or similar materials through the tapered bolt section, which means fewer components are needed as it does not require the use of eye bolts, eye nuts, or hanging hardware. This is expected to reduce costs for safety measures, improve workability, and shorten construction periods. - Its simple structure eliminates the need to check for screw loosening during inspections after construction, which is expected to enhance the reliability and efficiency of inspections. - This is a post-installed metal anchor that uses a sleeve-driven method. Since the sleeve expands in response to tensile forces, it is expected to provide a more reliable crimping effect. It has been designated as a recommended material by the Japan Seismic Ceiling Construction Cooperative.

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When the cap set on the nut reaches the appropriate torque, the inner claws break, and the cap spins freely to indicate that the installation is complete. A capped state means it has not been installed. The work is completed when the cap comes off and the nut is exposed. This prevents not only forgetting to tighten or insufficient tightening but also seizing due to over-tightening. It is possible to tighten with the appropriate torque using only an impact wrench, without the need for a torque wrench or special tightening machinery.

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