Middle Concave Design - Does not Include Front lip (A-1680FL), Used in 2nd Position for Increased Threshing Capabilities. 

The Helical Bar concave is often the solution when more aggressive threshing is needed. Since the cross bars and wires run diagonally in a helical bar concave, material entering the rotor strikes a helical bar concave at a right angle. This prevents whiteheads and unthreshed grain. This innovative concave can be installed in the front concave position when encountering tough threshing grain. If even more aggressive results are desired the middle concave can be replaced with a helical bar concave as well.

Suits the following machines:

Case-IH COMBINE: 1680
Case-IH COMBINE: 1682
Case-IH COMBINE: 1688
Case-IH COMBINE: 2188
Case-IH COMBINE: 2377
Case-IH COMBINE: 2388
Case-IH COMBINE: 2577
Case-IH COMBINE: 2588
Case-IH COMBINE: 5088
Case-IH COMBINE: 5130
Case-IH COMBINE: 5140 (SN <YFG014001)
Case-IH COMBINE: 6088
Case-IH COMBINE: 6130
Case-IH COMBINE: 6140 (SN <YFG014001)
Case-IH COMBINE: 7088
Case-IH COMBINE: 7130
Case-IH COMBINE: 7140 (SN <YFG014001)