Chart: Belt Weights

2″x72″ grinding belts are the workhorse of modern blade grinding. You might notice the letter codes that are associated with these belts. Here’s how I translate the codes (additions or corrections welcome):

 

Letter Code Material Weight Stiffness
JE Rayon Very Light Extremely Flexible
JF aka J-Flex Cotton Light Very Flexible
J Cotton Light Flexible
XF aka X-Flex Cotton Heavy Somewhat Flexible
X Cotton Heavy Stiff
YX Polyester Light Stiff
Y aka YY Polyester Heavy Very Stiff
E Paper Heavy
F Paper Very Heavy