Metal crack repair LOCK-N-STITCH and screw hole repair Full Torque
Alternative welding technology LOCK-N-STITCH and the permanent female thread repair material 'Full-Torque' completely solve the problems of threaded holes.
The LNS method eliminates thermal distortion and secondary cutting, making machining unnecessary, which allows for reduced construction time and cost savings.
■□■ A Completely New Metal Crack Repair That Is Not Welding ■□■ ~Complete Repair of Screw Holes~ The LOCK-N-STITCH 'LNS' method, which is not welding, uses special screws and reinforcement locks, employing mechanical stitching metal joining technology that prevents thermal distortion and secondary fractures, eliminates the need for machining, and allows for easy on-site construction, enabling a completely new crack repair that shortens construction time and reduces costs. Additionally, the permanent screw hole repair 'Full-Torque' is not a temporary fix like conventional products, but allows for a permanent repair, extending the lifespan of the equipment. The permanent female thread repair insert 'Full-Torque Thread Insert' perfectly resolves worn or damaged bolt holes in a single application.
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basic information
The LOCK-N-STITCH 'LNS' method's special screw, CASTMASTER (C series pin), is not a welding method and features a unique thread form known as a "spiral hook," which has a different angle compared to conventional screws. It pulls the crack areas together and secures them permanently. Additionally, the reinforcement LOCK is used to increase strength across the crack, and all LNS Locks have the function of pulling the crack areas together, preventing the progression of cracks. The permanent female thread repair material 'Full-Torque' utilizes a patented upward-facing thread structure that draws in the surrounding base material, reinforcing it. Furthermore, the force that pulls the surrounding base material is activated by product insertion, allowing for construction up to the corner edges. Unlike temporary repairs typical of conventional products, it enables permanent repairs, extending the lifespan of equipment. Sizes range from φ6 to φ64, with custom sizes and pitches available upon order. Larger sizes can also be installed on-site. Perfectly resolves worn or damaged bolt holes!
Price information
Full-Torque
Price range
P2
Delivery Time
P3
※The delivery date may vary depending on the quantity, so please feel free to contact us.
Applications/Examples of results
The Full-Torque insert has many issues with existing methods, especially when bolt holes in aluminum or cast products are damaged. Currently, ordinary Heli-Coil products available on the market cannot apply full torque, which makes it impossible to maintain the fastening strength of existing bolts and does not resolve leakage issues. The Full-Torque insert manufactured by LNSJAPAN can be used regardless of temperature, pressure, or vibration, and perfectly resolves leakage problems caused by damaged bolt holes. This performance has already been certified in the American market and is supplied to global engine manufacturers such as Caterpillar and Cummins, and is also applied in engine repairs for Ford. Additionally, it has been applied to tire manufacturers like Cooper Tire and Nexen Tire, contributing to the longevity of their equipment and achieving cost reductions. Furthermore, it has been applied in POSCO and steel companies, as well as marine engines, receiving great acclaim and continuously expanding its application fields. The Full-Torque insert solves all problems and concerns related to bolt holes.
Detailed information
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Not welding, but a completely new method for repairing cracks and fractures. Repairs in locations where fire is not desired and where time is limited have been impossible with previous technologies, but our company's LNS method using special screws and strength reinforcement locks can address these issues. Additionally, welding has a high risk of thermal distortion and secondary fractures, but the LNS method provides a permanent repair. Steelmaking: Adjustment lever section Material: Cast steel Crack length: 300 mm
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A completely new crack repair that does not involve welding. Repairs in locations where the use of fire is not desired and where time constraints are an issue have been impossible to solve with previous technologies. However, our company's LNS method, using special screws and locking mechanisms for strength reinforcement, can address these issues. Additionally, welding has a high risk of thermal distortion and secondary fractures, but the LNS method provides a permanent repair. Steelmaking: CLT chlorine compressor lower casing Material: cast steel Crack length: 200 mm
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Permanent repair insert for female threaded holes "Full-Torque" Full-Torque is a repair insert for threaded holes that can reinforce the base material due to its special screw thread shape. With a patented upward-facing screw thread structure, it exerts a force that draws in the surrounding base material, thereby reinforcing it, and can be applied all the way to the corner edges. Unlike conventional temporary repairs, it allows for permanent repairs, extending the lifespan of equipment. Product name: Payoff Roll Material: Chromolybdenum steel M: 30×3.5
Line up（1）
| Model number | overview |
|---|---|
| FFT,FFB,FST,FSB | The FFT type is commonly used and is an easy-to-install insert. The FFB type is generally applied to the head bolt holes and bearing bolt holes in gas and diesel engines. The FST type adds additional force around the hole to withstand lateral loads on the shoulder. The FSB type requires that the bolt holes connected to the water jacket maintain a seal to prevent leakage of (coolant, lubricating oil). |
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Company information
<We provide nationwide support> LNS JAPAN Co., Ltd. is an engineering company that performs maintenance and repairs on cracks and damages in equipment and metal structures across various industries (such as petroleum, chemicals, power generation facilities, ships, heavy equipment, automobiles, steelmaking, etc.) using the METAL STITCHING method. Currently, most of the critical equipment used across industries is facing a tough situation regarding new capital investment due to the global economic downturn. In Japan's industries, welding technology, which is widely used for metal repairs, has recently led to significant damage to many pieces of equipment and critical assets due to a shortage of skilled craftsmen and inexperienced welding repairs, with many cases worsening. Our company is the only certified company in Japan and is committed to continuous technological development in collaboration with our parent company, LOCK-N-STITCH INC, which continues to leap and grow as a global enterprise. We promise to ensure that our repairs do not cause deformation or secondary cracks due to heat, which have been issues with traditional welding repairs, while also shortening construction periods and reducing costs, thereby extending the life of equipment and ensuring high quality and prompt maintenance. For repairs where fire is not desired or where time is limited, please contact LNS JAPAN.