Complete prevention of deformation and cracking due to pinhole wear. An all-around solution with a unique expansion mechanism.
Not only bucket pins and attachment pins, but also wear occurring in the pin holes of movable parts such as the arms of construction machinery, particularly the phenomenon where pin holes become oval-shaped, is a source of concern for many people. For manufacturers, this increases maintenance costs, which are a quality indicator of the machine, and shortens the product lifespan. For machine users, it leads to chronic issues with high maintenance costs and opportunity losses (downtime) due to repair periods when the machine becomes unusable. The benefits of the Expander System are that it can be used semi-permanently and contributes to improving machine quality by extending the product lifespan, while also significantly reducing running costs and maintenance time. The Expander System is already widely adopted by leading construction machinery manufacturers, including Japanese companies, and has passed a continuous practical durability test of 60,000 hours at Volvo Construction Equipment without compromising any functionality. Additionally, all Expander System products come with a lifetime warranty, guaranteeing the product's functionality until the first removal.
Inquire About This Product
basic information
The Expander System features a unique expansion mechanism that, after being inserted into a pin hole, expands within the hole to perfectly fill any gaps. As a result, stress is distributed from surface contact to the entire area, protecting the machine's pin holes. Additionally, the bending stress on the pin itself is reduced by half due to this mechanism, significantly lowering the risk of pin breakage. In practical durability tests conducted by Volvo Construction Equipment in Sweden, the system operated continuously for an astonishing 50,000 hours (approximately 6 years) without any issues. Moreover, the Expander System's versatility as a solution that can be used as an attachment pin for buckets, as a drive shaft for construction machine arms, or as a pin for movable parts of transport vehicles is one of its major strengths. *For more details about the Expander System, please contact Nord-Lock Japan.*
Price range
Delivery Time
Applications/Examples of results
<Representative Recruitment Cases> ■ Construction Machinery, Civil Engineering Heavy Equipment, and Railway Work Vehicles - Dump Trucks - Excavators - Wheel Loaders - Cranes (any size) - Shovel Cars, Backhoes - Bulldozers - Snow Removal Equipment - Movable Bridges ■ Agricultural and Forestry Heavy Equipment - Combines - Harvesters - Loaders - Skidders (Logging Equipment) - Feller Bunchers (Felling Equipment) - Bunchers (Felling and Gathering Equipment) - Spraying Equipment ■ Excavation, Tunnel Construction, and Aggregate Heavy Equipment - Excavators - Drill Rigs - Rock Drills - Hauling Vehicles - Scalers ■ Oil and Gas Field Extraction Heavy Equipment - Piping and Material Handling Equipment - Crane Equipment - Transport Vehicles - Top Drive Drilling Rigs - Modular Pipe Racks - Clevises - Dollies - Dredgers - Power Units - Hatches and Access Ports ■ Various Manufacturing Plants - Paper Mills – Cutters / Various Filters for Sediments / Filter Rollers / Jack Screws, etc. - Thermal Plants – Roasters / Fuel Feeders / Grapple Equipment, etc. - Sawmills – Packaging Machines / Intake Equipment / Trimmers, etc. - Steel Mills – Cooling Stands, etc.
catalog（3）
Download All Catalogs
Company information
Nortlock Japan Co., Ltd. aims to be a partner in solving all bolt fastening challenges, centered around four brands: the "Nortlock Washer," a locking mechanism that does not rely on friction and prevents loosening; the "Superbolt," which allows enormous bolts and nuts that cannot be tightened by hand to be tightened with just one torque wrench; the "Boltight," which can simultaneously tighten multiple large-diameter bolts with uniform pressure; and the "Expander," a pivot pin for construction and heavy machinery that can be used semi-permanently.
