hammer mill hemp grinder - 7.5hp gasoline powered usa in-stock w/support. brand new. c $3,232.20. buy it now. c $498.22 shipping. from united states. s p 7 o n s o r b k z e r 9 i d i 1 5. hammer mill feed grinder -15hp 220v 3ph electric powered,gehl hammer mill screen implement alley forum,feb 04, 2019 posted fri jul 17, 2015 1025 am post subject re gehl hammer mill screen. just talked to a gehl dealer. can still get new screens for the mx65, except theyre $195 each. but, i would have been happy to pay that back in january when i had the mixer tank full of feed and nothing was coming out of the unload auger.