I have an opportunity to pick up an assortment of grade 5 fine thread bolts at our local fastener store. He said everyone wants grade 8 and he rarely sells them. I can only think of a few places on a Cub that use fine thread, but thought the collective intelligence of the group will probably come up with a bunch. He wants to get rid of them cheap, and I think he would let me take only the sizes that I want. What is the downside to using a fine thread in place of a coarse thread?
Thanks, Bob
This site uses cookies to maintain login information on FarmallCub.Com. Click the X in the banner upper right corner to close this notice. For more information on our privacy policy, visit this link: Privacy Policy
NEW REGISTERED MEMBERS: Be sure to check your SPAM/JUNK folders for the activation email.
Grade 5 fine thread bolts on a Cub
Forum rules
Notice: For sale and wanted posts are not allowed in this forum. Please use our free classifieds or one of our site sponsors for your tractor and parts needs.
Notice: For sale and wanted posts are not allowed in this forum. Please use our free classifieds or one of our site sponsors for your tractor and parts needs.
-
- Team Cub
- Posts: 11817
- Joined: Tue May 25, 2004 8:02 pm
- Zip Code: 80501
- Tractors Owned: Cubs, MH Pony, Shaw, Allis G, 1934 Silver King, JD LA and LI, Gibson D, David Bradley Tri-Trac
- Circle of Safety: Y
- Location: CO, Longmont
Grade 5 fine thread bolts on a Cub
"We don't need to think more,
we need to think differently."
-Albert Einstein
we need to think differently."
-Albert Einstein
- ricky racer
- 10+ Years
- Posts: 6303
- Joined: Wed Sep 12, 2007 8:40 pm
- Zip Code: 49120
- Circle of Safety: Y
- Location: Niles / Buchanan, Michigan
Re: Grade 5 fine thread bolts on a Cub
There is no downside to using fine thread bolts, however there are very few tapped holes in a Cub that will accept fine thread bolts. The flywheel mounting bolts are one of the few locations I can think of.
1929 Farmall Regular
1935 John Deere B
1937 John Deere A
1941 John Deere H
1952 John Deere B
1953 Farmall Cub
1935 John Deere B
1937 John Deere A
1941 John Deere H
1952 John Deere B
1953 Farmall Cub
- bob in CT
- Team Cub Mentor
- Posts: 6018
- Joined: Thu Jun 07, 2007 9:34 am
- Zip Code: 06040
- Tractors Owned: 77 Cub (red); 74 Cub; 52 Cub; 50 Cub ( post-demo)
- Circle of Safety: Y
- Location: CT, Manchester
Re: Grade 5 fine thread bolts on a Cub
And muffler clamps on underslung exhaust. I don't think flywheel bolts are grade 5. Add the square head rim bolts and pickings are slim.
-
- 10+ Years
- Posts: 156
- Joined: Fri Mar 31, 2006 12:43 pm
- Zip Code: 14005
Re: Grade 5 fine thread bolts on a Cub
Pan seat bolts are fine thread. Front wheel bolts also. You could always use them for other projects.
Larry
Larry
-
- 10+ Years
- Posts: 3034
- Joined: Wed May 31, 2006 12:09 pm
- Zip Code: 74070
- Circle of Safety: Y
- Location: OK, Skiatook
Re: Grade 5 fine thread bolts on a Cub
Clamp bolts for the adjustable front axle are fine thread.
-
- 10+ Years
- Posts: 1421
- Joined: Sun Apr 30, 2006 2:54 pm
- Zip Code: 60073
- Circle of Safety: Y
- Location: IL, Round Lake Heights
Re: Grade 5 fine thread bolts on a Cub
I may be wrong (and please correct me if I am), but I believe that, all other things being equal, fine threads have more holding power than coarse threads, so if you converted, it would be only upside, not downside.
The downside, such as it is, would be that you can only substitute them where it is a nut and bolt combo, and you would have to purchase nuts as well as bolts.
The downside, such as it is, would be that you can only substitute them where it is a nut and bolt combo, and you would have to purchase nuts as well as bolts.
Michael Cummings
Eddie - a 1959 International Lo-Boy named after my father in law, who who bought her new.
Eddie - a 1959 International Lo-Boy named after my father in law, who who bought her new.
-
- Team Cub Mentor
- Posts: 20336
- Joined: Fri Jul 02, 2004 9:52 pm
- Zip Code: 65051
- Circle of Safety: Y
- Location: Mo. Linn
Re: Grade 5 fine thread bolts on a Cub
I wouldn't do it. Just buy the fine threaded bolts and nuts as needed.
I have an excuse. CRS.
-
- 5+ Years
- Posts: 441
- Joined: Sat Jul 12, 2014 10:10 pm
- Zip Code: 53105
- Tractors Owned: '57 cub Loboy
'61 cub - Circle of Safety: Y
- Location: Wisconsin, Burlington
Re: Grade 5 fine thread bolts on a Cub
bythepond88 wrote:but I believe that, all other things being equal, fine threads have more holding power than coarse threads
In general, fine threads do have more holding power in steel , but actually less in soft materials such as aluminum. You can get more torque with them and they tend to "hold better" and not come loose as easy as course threads. A ball hitch is a good example of this. A gear puller with course threads is considered weak, and poor quality for this same reason. Another tid bit- threaded bolt holes should be a minimum depth the diameter of the bolt. A 1/2" bolt should go in a hole with good threads at least 1/2" deep. 1.5 times the diameter if going into cast steel.
Tim
Who is online
Users browsing this forum: No registered users and 24 guests