Stainless Steel Poly Chain® Flange Color

Customers sometimes ask about the pinkish color of Gates stainless steel Poly Chain sprocket flanges. The discoloration is a result of the high temperature shrink process used to mount the flanges.

Flange discoloration is seen in both the stainless steel and the standard Poly Chain sprocket lines. During the shrink fit process, the standard sprocket flanges (low carbon steel) usually turn black or brown.  Conversely, the stainless steel flanges typically take on more of a pink hue.

Flange discoloration is normal and will not impact the performance of the product.



Standard Sprocket

Stainless Steel Sprocket