Definition -A Parallel Key is a mechanical key with a uniform rectangular or square cross-section used to connect a shaft and hub so torque is transmitted without relative rotation. Its purpose is to provide reliable power transmission while allowing easy assembly and disassembly. Parallel keys are commonly used in gears, pulleys, couplings, and general industrial machinery.

Sunmach is an international producer of precision-engineered Parallel Keys, manufactured using corrosion-resistant Stainless Steel and premium Nickel Alloys. All Parallel Keys are produced in exact compliance with customer specifications and defined tolerance standards. These custom-designed components are engineered to deliver reliable performance in critical industrial applications.

We are an ISO 9001:2015 certified company, demonstrating our commitment to rigorous quality standards and consistent product excellence to deliver the best of the Nickel Alloys & Stainless Steel Parallel Key.

We make these Parallel Key from a range of high-performance & exotic materials such as : Hastelloy® C-276, Hastelloy® C-22, Hastelloy® B-2, Monel® 400, Monel® K-500, Inconel® 600, Inconel® 625, Inconel® 718, Titanium Grade 2, Titanium Grade 5, Titanium Grade 7, Duplex S31803, Duplex S32205, Super Duplex S32750 to various Stainless Steel grades of SS 304L, SS 316L SS 310, SS 310H, SS 347H, etc followed by Special Stainless Steel Grades such as 904L Stainless Steel, UNS N08904, DIN EN1.4539 Nitronic® 50, Nitronic® 60, UNS S21800, DIN EN, 254 SMO, UNS S31254, DIN EN 1.454, Stainless Steel 410 & Stainless Steel 420 etc.

Sunmach’s extensive manufacturing capabilities and In-Stock Genuine & Authentic Raw Material availability allows us to support demanding industrial requirements with durable, corrosion-resistant, heat resistant & reliable Shafts made from Genuine Nickel Alloys and Stainless Steel Material, delivered dot in time to any corner of the world, supported by all required test certificates and with 100% traceability.