cherokee45
NAXJA Forum User
- Location
- idaho
Anyone know the size of the bolts for the bearing caps
Diameter , length and grade?
Diameter , length and grade?
-
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Dana 30hp carrier bearing bolts
- Thread starter cherokee45
- Start date
yossarian19
NAXJA Forum User
- Location
- Grass Valley, CA
I'm fairly sure it's a 3/8 coarse grade 8, I want to say 3" long but that's based on memory from last time I pulled one apart (didn't measure...)
Why?
Why?
5-90
NAXJA Forum User
- Location
- Hammerspace
1/2"-13, use a proper SAE8 (not Chinese crap - US, Germany, England, Taiwan, Hong Kong, Eastern Europe - just not China!)
I don't recall the lengths, but you can either measure the underhead length of a screw in hand (if you didn't lose them all,) or measure the thickness of the cap boss (that the screw passes through) and add 1/2". If it's between sizes, get the next size longer - you'll be adding a few sixteenths, tops.
Proper socket head capscrews are H&T to SAE8 specs UOS, FYI.
(H&T - Hardened & Tempered. UOS - Unless Otherwise Specified.)
I don't recall the lengths, but you can either measure the underhead length of a screw in hand (if you didn't lose them all,) or measure the thickness of the cap boss (that the screw passes through) and add 1/2". If it's between sizes, get the next size longer - you'll be adding a few sixteenths, tops.
Proper socket head capscrews are H&T to SAE8 specs UOS, FYI.
(H&T - Hardened & Tempered. UOS - Unless Otherwise Specified.)
cherokee45
NAXJA Forum User
- Location
- idaho
Spicer specs it out as 7/16-14 2 1/2" grade 8
yossarian19
NAXJA Forum User
- Location
- Grass Valley, CA
Check out the brains on this guy
Nice find.
I'm with 5-90 on bolt quality.
If you want to learn more than you'd ever thought there was to know about hardware, look up Carrol Smith's Nuts, Bolts & Fasteners book. The gist of it: "better than grade 8" bolts are garbage, "grade 8" is suspect because of poor quality control, Mil-Spec & Aircraft bolts are the best you can get. Probably better than necessary for this application, really.
- Location
- Rainy side of Washington
AN spec hardware is roughly equivalent to grade 8, slightly stronger but not by much.
The only difference is that it's made by people who are assuming you are putting it in an important part of an airplane, and you can get certificates/paperwork for each lot that says who made it and when it was made, so it's less likely to be lowest-bidder chinesium.
That being said, I've never had an issue with grade 8 bolts.
The only difference is that it's made by people who are assuming you are putting it in an important part of an airplane, and you can get certificates/paperwork for each lot that says who made it and when it was made, so it's less likely to be lowest-bidder chinesium.
That being said, I've never had an issue with grade 8 bolts.
