Grade of steel for barrel studs BSA b44

baz

baz

VIP MEMBER
Joined
May 26, 2010
Messages
7,258
Country flag
Does anyone know the grade of steel to use to make new barrel/crankcase studs for a hybrid engine, I could buy some b50 ones and cut them back and re thread
Or make my own so I need to know what grade to order ? Maybe en9 ?
Cheers
 
There is nothing wrong with the OE studs; considerably less expensive to purchase a new set, saves a ton of time, however if you are bent on making you own you may want to visit this link:

https://www.arp-bolts.com/p/technical.php

A bit of history and a view of what ARP is making high stress engine fasteners out of.

Best wishes
 
RoadScholar said:
There is nothing wrong with the OE studs; considerably less expensive to purchase a new set, saves a ton of time, however if you are bent on making you own you may want to visit this link:

https://www.arp-bolts.com/p/technical.php

A bit of history and a view of what ARP is making high stress engine fasteners out of.

Best wishes
Click to expand...
The reason I am asking is because I can't buy the length I need off the shelf
Thanks for the info
Cheers
 
I would advise not to cut the threads with a die, thought you might get away with it. you would be better of getting the threads rolled, which involves no cutting like a die cut and is stronger.
High tensile steel rod is available off the shelf of most metal supply merchants – thought some will only supply by the metre.
 
Bernhard said:
I would advise not to cut the threads with a die, thought you might get away with it. you would be better of getting the threads rolled, which involves no cutting like a die cut and is stronger.
High tensile steel rod is available off the shelf of most metal supply merchants – thought some will only supply by the metre.
Click to expand...
Yes I see what you are saying, were the threads rolled on the original studs would you know?
 
The parts book that I have only mentions the short studs in the head ( EN9) and the rocker adjusting screws (EN14B) as special materials. No note on the cylinder studs. You need a Rockwell hardness tester...

Greg
 
If the parts book does not reference a special steel then they are normal steel, BSA uprated the stud diameter when they went B40 to B44 but the bottom thread remained the same.

Maybe this site could machine some from steel for you or the right grade of stainless to match the strength.

http://www.motalia.net/index.php?cPath=1_263_461_465
 
You must log in or register to reply here.
Back
Top