Profile: HKK Chain Corp. Of America specializes in roller chains. Our products includes single & double pitch, aqua series, leaf and lumbar roller chain series. Our solid bushings and solid rollers are cold-forged from steel rod. This cold-forming process allows us to design bushings and rollers that hold a totally cylindrical inside diameter after being assembled into the side plates. The result is complete pin bushing contact, which minimizes elongation caused by friction and uneven wear. Our double-pitch roller chain is similar to HKK standard roller chain, except the pitch is twice that of standard roller chain. These chains weigh less and are lower in cost than standard roller chain of the same strength. They are ideal for slow and moderate speed applications, particularly when shaft centers are relatively long. There are two types of double-pitch chains. The transmission type has figure-eight shaped link plates. The conveyor type has straight edged link plates. The conveyor type chains are available with standard rollers or with oversized carrier rollers. conveyor series chains with 1.5" pitch and larger are constructed with heavy series side plates. The HKK double-pitch chains are manufactured to the highest standards with solid bushings and rollers.