shearbolts

[4520RX]

I have a 60" general busghog was wondering what is the best grade of bolt to use. currenly using grade 2

 

[Muhammad]

Welcome to TBN.

 

[Bob77064]

Welcome

 

[Bob77064]

My rotary cut is also a 60" not sure what grade the bolt is. When I went to TSC to get bolts they showed me the bolts to use.

 

[jlsmith]

Grade 2 is a standard sheer bolt but will break under a small load. I use a grade 5 bolt with my mowers and they work a lot better, don't have to change them after hitting a gopher mound. Do NOT us grade 8 bolts, they will not break and cause a lot of damage to your mower.
Jeremy

 

[Gale Hawkins]

Grade 2 is a standard sheer bolt but will break under a small load. I use a grade 5 bolt with my mowers and they work a lot better, don't have to change them after hitting a gopher mound. Do NOT us grade 8 bolts, they will not break and cause a lot of damage to your mower.
Jeremy

I did the same but since I never sheared the grade 5 was concerned it was a bit too hard to shear.

 

[creekbend]

Good to have you aboard. :tractor:

 

[dfkrug]

I have a 60" general busghog was wondering what is the best grade of bolt to use. currenly using grade 2

Owner's manuals generally recommend Grade 2.

However, my local rental center (5 locations) has moved to higher bolt
grades because they shear off cleaner (more brittle) than grade 2s. They
say that the grade 2s bend and squish a bit and are harder to replace.
They have replaced hundreds, if not thousands.

 

[rsewill]

My 47" blower uses Grade 5 bolts (came that way from the factory.)

 

[Beltzington]

I have a 72" RC and use Grade 2 bolts. Based on my observations on the impact it takes to shear these G2 bolts I would not want to subject the RC to anymore abuse. @ 24-cents each it is cheap insurance and I can use the exercise.

 

[moored4]

I use grade 5 on ours!

:welcome: to TBN! :thumbsup:

Happy :tractor: ing!

 

[Briana03]

WELCOME to TBN

I moved your thread to the Parts/Repairs Forum.

 

[nickel plate]

My Bush Hog 480 Squealer manual lists a grade 2 bolt.

 

[Western]

I use grade 2 also, most of the time. I have been told and what I use, is the marks on the bolt head. More marks, the higher the grade, so I use that when rummaging through old bolts if I need on.

 

[Jerry/MT]

I have a 60" general busghog was wondering what is the best grade of bolt to use. currenly using grade 2

Follow the recommendation of the OEM that made your mower. They're the ones who know. Rental outdits don't really care about mower life. They turn them over after a fixed number of hours.
The average user wants long life and the OEM spec is what you should be following. Your time and the shear bolt are a lot cheaper than a new RC gear box and/or a tractor pto!

 

[Gale Hawkins]

Follow the recommendation of the OEM that made your mower. They're the ones who know. Rental outdits don't really care about mower life. They turn them over after a fixed number of hours.
The average user wants long life and the OEM spec is what you should be following. Your time and the shear bolt are a lot cheaper than a new RC gear box and/or a tractor pto!

That is good advice but after so many times from just hitting stools of some kind of swamp grass and replacing the bolt while getting eaten alive by mosquitoes I went one grade harder. It never sheared so I do not know what would have broken first but I was OK if it had been the U joint.

Life is about taking risks and hoping none are deadly.