Track chains are made up of track links, pins, bushings, seal kits etc. There are two types of chains: dry chains and lubricated chains. The former are commonly used on excavators, while the latter mainly on bulldozers. The pin rotates inside the bushing, internal wear on the pin and bushing is usually the main reason for dry chains requiring servicing. For lubricated chains, pins are drilled, providing a reservoir for lubricant, which is directed through a small oil passage to the area that between pin and bushing. By keeping the pin and bush lubricated, the wear life of the chain is extended. At F&L, both chain options are available.
Track links: Links are manufactured from high quality alloy steel 35MnBH, using advanced machines, including 1600Ton, 2500Ton and 3150T hot-die forging press (Russia), HASS machining center (America) & MAZAK machining center (Japan). Links are heat-treated, specially at the link rail, which is the surface of the link that contacts with the rollers, idlers & sprockets, so the rail wear life lasts longer.
Pins: Pins are made of material 40Cr, then go through quenching, tempering & intermediate frequency treatment, ensuring pin core and pin surface both meet their specific performance requirements.
Bushings: Track bushings go through carburization, quenching and intermediate frequency treatment, both inner and outer surfaces are with good wear resistance and proper hardness.
Seals kits: A small part but matters a lot. At F&L, we import seals from South Korea, making it same quality with those used in OEM market. These seals hold in lubricant between the pin and bushing, and keep out dirt effectively for a long time.
Single-grouser track shoes are typically for bulldozers, when grip and traction are the main factors. Triple-grouser track shoes are for excavators, providing firm grip and low ground pressure.
At F&L, track shoes are made of 25MnB high quality alloy steel. For each machine model, we offer varies options of shoe Width and Thickness. As wider shoes accelerate the internal wear on pins and bushings, need more power to turn, they are more likely to crack or bend. So, the narrowest shoes possible are always suggest, for adequate flotation & less undercarriage maintenance cost.