If anyone is or is planning to upgrade G0453 15" grizzly planer to a shelix head pm me. I have the three bearings, gasket and helical gear to do this correctly. I would rather throw these parts away than deal with Grizzly again. I will not get into why I have these parts, I will say though Grizzly customer service SUCKS and they have no idea what they have on hand when you place an order. This is just one persons experience so please no hate mail .