I rebuild quite a few cub cadet trans/rears,got in a aluminum case in,i always use grade 8 bolts to assemble the cast iron cases,new bolts and warshers in every hole.this aluminum case is roughly 2100 dollars so I decided to use studs,to preserve the threads in the case.i wewnt to zeigler nut and bolt in canton,ohio.a 1 1/2 hour drive.i need 5/16,3/8,1/2 stads of various lenghths.the counter salesmen were very very nice,and I test fit the studs for perfect length,again they were very knowledgable and great guys,i usually order over the phone,but had extra time so I drove out.i requested grade 8 studs,made in America,i had a choice of American or Chinese.upon assembly,while torqueing the nuts I took a break at 15 lbs,while talking I heard,ping,ping ping,it was the 3/8 studs just poping,shearing.i cant believe it ,at 15 lbs.one even broke with my torque wrench sitting on it finger tight.so looks like I'm gonna be making studs out of grade 8 all thread,the ones I bought were totally junk too
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an alternative browser.
You should upgrade or use an alternative browser.
- Thread starter 88-1175
- Start date
Steve@Advance
Well-known Member
Something went wrong in the heat treat/annealing process.
I would give Zeigler a call! I would sure want to know if I had bad parts on the shelf!
They may have another brand, even the China ones might be OK.
I got into that once with a set of Mr. Gasket main studs for a sb Chevy. They were the opposite, would not torque, just kept getting longer, and longer...
I would give Zeigler a call! I would sure want to know if I had bad parts on the shelf!
They may have another brand, even the China ones might be OK.
I got into that once with a set of Mr. Gasket main studs for a sb Chevy. They were the opposite, would not torque, just kept getting longer, and longer...
37chief
Well-known Member
- Location
- California
I am doing the same thing. My mower has the gear box mounted with 5/8 bolts. I wanted studs, as the bolts were too short in the past, and I didn't like the fit. I ordered studs from Mc Master carr. I have ordered a lot stuff from them while I worked in my factory job years ago. Most was top quality. My studs arrived the next day . Stan
There are still counterfeit bolts floating around the country that were made in unknown places. The costs are low so purchasing agents buy those bolts, not realizing that they are probably sub-standard.
There are charts available that explain the head markings on bolts and how to identify who made the bolts. If you can't match the head markings to anything on the charts, the bolts are probably counterfeit and have never been tested in a lab. We fought counterfeit bolts at ADOT through the 80's and 90's on were still fighting them when I retired; they kept showing up in name brand equipment because they where cheaper. The record was 143 bolts on a small paver that the manufacturer had to change out to comply with the specifications so he could get paid.
If you can get a copy of the certified bolt manufacturer's head markings, you can protect yourself from buying inferior/untested bolts. Those counterfeit bolts are in the pipeline and it will take years to eliminate them.
There are charts available that explain the head markings on bolts and how to identify who made the bolts. If you can't match the head markings to anything on the charts, the bolts are probably counterfeit and have never been tested in a lab. We fought counterfeit bolts at ADOT through the 80's and 90's on were still fighting them when I retired; they kept showing up in name brand equipment because they where cheaper. The record was 143 bolts on a small paver that the manufacturer had to change out to comply with the specifications so he could get paid.
If you can get a copy of the certified bolt manufacturer's head markings, you can protect yourself from buying inferior/untested bolts. Those counterfeit bolts are in the pipeline and it will take years to eliminate them.
Tramway Guy
Well-known Member
Grade 8 studs in aluminum seems like a poor match. But whatever you had should not have broken like that.
jimg.allentown
Well-known Member
A 5/16 stud breaking at 15 ft-lbs of torque? I have never seen a bolt or stud that size break at such a low torque. Those studs cannot be grade 8. Look up the metallurgy on them. They should be able to go up to 35 without breaking. There is surely something wrong with those studs, but I can assure you that they are NOT American made grade 8 studs!
dr sportster
Well-known Member
Let me know if you find grade 8 threaded rod.
GeneMO
Well-known Member
- Location
- Pilot Grove, Mo.
Something was obviously not right. I would be calling the outfit I bought em from.
If I really want good bolts, I go to the Caterpiller dealer here.
I replaced a bunch of bolts when I was putting my little Cat back together after a hydraulic pump rebuild. I used grade 8 bolts from Orshlen Farm and Home. I am guessing they were Chinese. $3.79 per pound.
So far so good.
Gene
If I really want good bolts, I go to the Caterpiller dealer here.
I replaced a bunch of bolts when I was putting my little Cat back together after a hydraulic pump rebuild. I used grade 8 bolts from Orshlen Farm and Home. I am guessing they were Chinese. $3.79 per pound.
So far so good.
Gene
Been in the bolt & nut business and I don't mean the fastener section at the hardware store for over 42 years. If you want domestic made product {Canadian & United States}, Mexico doesn't count go to a reputable fastener house in your area. The bolts you buy from TSC and other similar stores are imports. Won't bore you with Boltology 101 but there are only 3 true grades of bolts 2,5 & 8, anything else is a marketing ploy. Count the dashes on the head and add 2, that's your grade. Most Gr.2 are imports and marked A307. If you want to make your own studs ask for B7 all thread rod it is the hardest commercial rod you can buy. If you want some good info look at www.copperstate.com. My two cents.
dr sportster
Well-known Member
The tensile strength of a 3/8" s stud is 11600 lbs. so obviously there is another problem here.
tensile strnegth
tensile strnegth
We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.
Copyright © 1997-2024 Yesterday's Tractor Co.
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.
Yesterday's Tractors - Antique Tractor Headquarters
Website Accessibility Policy