Rasp Concave Bars ?
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=128871
Printed Date: 12 Oct 2025 at 9:50am
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Topic: Rasp Concave Bars ?
Posted By: JimWenigOH
Subject: Rasp Concave Bars ?
Date Posted: 17 Sep 2016 at 11:50am
| Are there any advantages or disadvantages to running rasp concave bars in soybeans vs the standard concave? I have some soybeans with grassy areas but no weeds I'll be harvesting with the K2. |
Replies:
Posted By: shameless (ne)
Date Posted: 17 Sep 2016 at 2:36pm
| you'll prolly crack a lot of beans |
Posted By: Kevin in WA
Date Posted: 18 Sep 2016 at 3:24pm
| I thought rasp concave bars were for hard to thresh crops that crack easily. |
Posted By: AC7060IL
Date Posted: 18 Sep 2016 at 4:26pm
| Aggressive cylinder bars (every other rib ground off) matched to regular channel concaves offers more gentle threshing not to mention increased capacity. |
Posted By: MACK
Date Posted: 18 Sep 2016 at 8:22pm
| I would say, if it won't take grass through with Chanel concave, you need new cylinder bars and lower clearance. MACK |
Posted By: JimWenigOH
Date Posted: 18 Sep 2016 at 8:39pm
The Operator's Manual states "The rasp concave may be used in a hard to thresh crop where seed is easily cracked, or in a straw condition that is hard to break up to let the threshed seed fall through." I used the standard concave last time in soybeans with good success, but didn't have any grass in them. I have the rasp bars on hand and was just looking for any first hand experiences. |
Kevin in WA wrote:Posted By: old farmer
Date Posted: 19 Sep 2016 at 6:30am
| Agree with Mack,also run a little higher cly speed |