GB Pro-Top is a durable replaceable sprocket nose bar designed and built for demanding professional users. Like other GB professional-use bars, the Pro-Top is ideally suited for high-speed / high-powered chainsaws where light weight and extreme durability are required. Pro-Top bars are precision engineered from high-tech, lightweight alloy steel for extra-long life and easy maneuverability.
The Pro-Top's sprocket nose assembly supports the saw chain as it rounds the nose. This reduces friction, allowing greater chain tension and up to 25% more cutting power compared to professional hard nose bars. These wear-reducing attributes allow a considerably narrower nose profile, making the Pro-Top especially well-suited for boring and/or limbing applications.
The time-tested Pro-Top nose cartridge is incredibly strong, with titanium alloy steel side- plates, precision Swiss bearings, specially-hardened sprocket and unique self-locking feature. During hardening, the nose side plates are injected with Carbon Nitride, which guarantees that Pro-Top is the hardest-wearing replaceable sprocket nose in the world.
Its body is equally tough. Pro-Top is crafted from a solid, high-carbon steel alloy that is specially heat-treated and tempered for super-long life. Its rails are extraordinarily strong, thanks to GB's precision groove-grinding process, and very resistant to wear and breakage as a result of induction hardening. The result is flawless, pro quality performance--cut after cut.FEATURES:
• One-piece solid steel body; specially heat-treated and tempered for high strength.
• Laser-cut for precision shape and fit-up.
• Precision-ground grooves.
• Rails are induction hardened and tempered.
• Super-tough, high-tech alloy sprocket glides on precision Swiss bearings.
• Nose cartridge side plates made of titanium alloy steel, hardened to CN40 specifications.
• Nose self-locks over a solid steel web on the bar body. Held firmly together by three high- tensile rivets.
• All GB bars are fully inspected and subjected to a strict quality assurance system during manufacturing.BENEFITS:
• Superior resistance to wear.
• Tougher and stronger nose plates can withstand greater abuse than those on competitive bars.
• Easy nose replacement.
• Precision shape and fit-up.
• Uniform rails with a strong base radius.
• Cutting performance enhanced.
• Maximum chain and bar life.
• More forgiving in cutting mishaps. Nose can usually be straightened and reused. Competitive noses may break or cause damage to bar body.
• Less chain-throwing and, thus, less risk of damage to the bar groove and rails.
• Extremely tough and durable.
