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JD's designation of bolt grades??

Tx Jim

Tx Jim

Well-known Member
Location
Coyote Flats, Texas
Anyone know what Material Grade A17D means in the spec's for JD bolts? I'm trying to get some correct strength shear bolts(19H1901) for the needle lift on my JD 347 sq baler without standing in line at the local JD parts counter. My baler isn't close to home to look at.
I know bolts(cap screws) with no radial dashes on head are #3,3 radial dashes on head is #5 and 6 radial dashes on head is #8
Thanks for any help,Jim
 
I Googled Deere Material Grade A17D and saw a lot of similar questions. Everyone seemed to think that this was Deere's propriatary grading system, and that A17D was equivalent to grade 5
 

Just my opinion, but isn't a grade 5 bolt incorrect for use as a shear bolt? Seems like you would want a grade 2?
 
Depends on the application. My Hay King pasture renovator uses 1/2" grade 5 shear bolts. Like you, I thought that was too hard for a shear bolt, but since that's what they call for, that is what I got. I quickly learned that they were just right. I consider myself doing good if I shear less than one per hour.
 
Jim, I thought the body of the bolt was unique so that a standard bolt could not be used.

I personally would not take the chance.
 
(quoted from post at 10:58:09 05/02/12) Jim, I thought the body of the bolt was unique so that a standard bolt could not be used.

I personally would not take the chance.
Click to expand...

Roger
You are correct on the flywheel shear bolts but a 19H1901 cap screw is just that a common cap screw. BP14125 has 6 radial dashes on the head

Part Number: BP14125
Part Price: 1.25 USD
On Hand: 99 Check Other Stores
Description: SHEAR BOLT,FLYWHEEL
Specification
Weight 0.07 LBS 0.03 Kg
Diameter 0.312 IN
Thread UNC2A
Length 2.252 IN
Thread Length 0.500 IN
Width Across Flats 0.562 IN
Head Height 0.215 IN
Material Grade STEEL

Part Number: 19H1901
Part Price: 0.90 USD
On Hand: 50 Check Other Stores
Description: SCREW, HEX HEAD
Specification
Weight 0.04 LBS 0.02 Kg
Diameter 0.312 IN
Thread UNC2A
Length 2.000 IN
Thread Length 0.875 IN
Width Across Flats 0.500 IN
Head Height 0.211 IN
Material Grade A17D
 
A17A Has the strength of SAE Grade 1
A17B Has the strength of SAE Grade 2
A17D Has the strength of SAE Grade 5
A17F Has the strength of SAE Grade 8
A17G Strength is 10% to 20% greater than SAE Grade 8
 
(quoted from post at 13:30:13 05/02/12) This info was copy/pasted from the Deere website.
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Cliff
Thank you. Where on JD's website is this info found?? This info may dispel the myth that JD engineers think a bolt of more than grade #3 shear bolt will be just fine.Thanks again,Jim
 
Jim, you are right about the 19H bolt being a regular bolt. Any John Deere bolt with that prefix is a common bolt. Mike
 
Jim, If you look up by part specifications on the Deere website looking at bolts one of the columns is material grade. Click on the grade and the list pops up. When looking at other parts like bushings or washers there will be a lot more materials listed, some can be deciphered and some not so much. I use the part spec search for a lot of odds and ends parts for all brands. It can be a lot easier than trying to find something by calling on the phone.
 

Mike
Thanks,after standing behind a JD dealers parts counter for many hrs in part of my 21 yr employment some things about the parts one never forgets. I still remember a lot of part numbers that were the fast moving items such as sq hay baler tying parts.
 
(quoted from post at 07:21:12 05/03/12) The older balers were don't know about newer... like a 3/8 bolt that reduced to 5/16 on threads..
Click to expand...

Thanks but I wasn't asking about a BP14125 flywheel shear pin but a 19H1901 plain-Jane cap screw(needle lift shear pin) that the shank and outside of threads are ultimately the same diameter.
 
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