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Implement Alley Discussion Forum

Sickle with rivets or bolt on sections

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Willy P

01-27-2007 19:07:13




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I am looking at buying a NH 451 sickle mower,and it has rivets on the sickle,can I change it to bolt on type? Will I have to use the higher knife clips? Will it cut good in short hay or will the higher clips keep the short hay from coming off the bar? Thanks




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Charlie M

01-28-2007 13:42:50




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 Re: Sickle with rivets or bolt on sections in reply to Willy P, 01-27-2007 19:07:13  
I use the bolts and would never go back to rivets again. I've changed broken knives by just unbolting them and putting the new one on. Didn't have to remove the whole knife bar from the machine. Bolts don't catch the grass and if they ever do rust in place they are a small bolt - they are easily twisted off. You will need the higher arch hold down clips.



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Hayfarmer

01-28-2007 11:15:05




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 Re: Sickle with rivets or bolt on sections in reply to Willy P, 01-27-2007 19:07:13  
I sorta thought the section bolts were the best thing since sliced bread. I have busted enough knuckles over the years chiseling the heads off of rivits. The only problem I have had was using them in the sickle head when the holes got a little loose, it seemed like the bolts did not hold well there. I have never found a nut so rusted I couldn't remove it with vice grips.



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farmallhal

01-28-2007 13:47:18




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 Re: Sickle with rivets or bolt on sections in reply to Hayfarmer, 01-28-2007 11:15:05  
Back when we used sickle mowers the bar maintanence was really quite simple. Had a large vise mounted on a workbench with enough clear room to either side for the sickle length. Opened the vise just enough so the knife section would slip between the jaws pointed end down but not enough so the bar could slide through. One good blow with a heavy hammer and rivets were sheared off and knife was on the floor. Take them all off which needed replacing at one time. Take a punch and knock the remaining rivets out of the bar. Put new knife section in with two rivets and flatten rivet using a piece of railroad rail as an anvil. Good to go. Can't ever remember getting banged up changing sections. Same can't be said when handling a sharpened sickle though. Rivets work just great and I'll bet you would get more skinned up knuckles using wrenches then the process noted above with the vise and hammer. Hope this helps, Hal.

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R Wyler

01-28-2007 07:03:34




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 Re: Sickle with rivets or bolt on sections in reply to Willy P, 01-27-2007 19:07:13  
One thing I wouldn't be without when dealing with rivets is the rivet tool "Rivet vise" I believe they are called. Especially nice to have when you are removeing the old rivets. With one of these tools dealing with rivets is easy.



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jimont

01-28-2007 06:46:58




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 Re: Sickle with rivets or bolt on sections in reply to Willy P, 01-27-2007 19:07:13  
Willy - Do yourself a favor ---- bite the bullet,buy a new knife (with bolt down sections)and a set of new guards. It'll be by far the best thing you'll ever do, makes a new machine out of an older one and will last for years. Don't forget that guards wear out as well.



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Michael Price

01-27-2007 20:19:42




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 Re: Sickle with rivets or bolt on sections in reply to Willy P, 01-27-2007 19:07:13  
I agree with dds, just put the rivets in, they are easier to get off then a rusted or worn bolt anyways.



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banjo

01-27-2007 20:17:44




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 Re: Sickle with rivets or bolt on sections in reply to Willy P, 01-27-2007 19:07:13  
I hav'nt noticed much difference in either one. I have the same NH 451 and have used both rivits and bolts. You will have to change the hold downs for the taller bolt heads. they look like the one up by the head for the rivited sections. I have used mine in very short grass and it might clog a little more on the tip.



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dds-inc

01-27-2007 19:49:28




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 Re: Sickle with rivets or bolt on sections in reply to Willy P, 01-27-2007 19:07:13  
Save yourself some pain and just put new rivets in...it's easy. grass will catch on bolts!!



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