Wouldn't You Know It

[Downwindtracker 2]

The fleamarket has opened. I found a nice S-K 15/16" socket, from the '58 to '62 time period. In the set I bought, one socket was split and welded. Might have been the 15/16 ? I thought.. A common size to break. I get home and it's the 7/8 9/16 bolts were very rare on the machines I worked on.

 

[Roberts210]

That's good news. Love S-K.

 

[BlakeTheCarGuy]

15/16 is easy to break? I have 3/8 and 1/2 drive 15/16 sockets in shallow and deep and have never broke one. Also never broke a 15/16 wrench either maybe it’s just me that hasn’t broken them lol.


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[Provincial]

One easy way to break a 12-point socket is to use it on a square head fastener. The angle of the broaching is 60 degrees in the socket, and the angle of the head is 90 degrees, resulting in concentrated stresses. A 15/16 12-point socket is a sloppy, but effective fit on a 3/4" square bolt head. If I remember right, a 5/8 12-point fits a 1/2 square head.

 

[outofbounds]

A 15/16 12-point socket is a sloppy, but effective fit on a 3/4" square bolt head. If I remember right, a 5/8 12-point fits a 1/2 square head.

Is there not a 3/4" 8-point socket in that era? Just curious as I read this thread.....

 

[ssdave]

....

 

[Provincial]

Is there not a 3/4" 8-point socket in that era? Just curious as I read this thread.....

Indeed, there was. And if one is not at hand, the temptation is to use what "works."

 

[Downwindtracker 2]

A 15/16" is the head size for a 5/8" bolt and nut. It's a common size in sawmills holding down billow blocks. A millwright in sawmills bread and butter is replacing bearings. A big sawmill is four stories up and the length of a football field, making getting a torch a great deal of extra work. I've broken 2 or 3 and lost that many over the years.

 

[BlakeTheCarGuy]

A 15/16" is the head size for a 5/8" bolt and nut. It's a common size in sawmills holding down billow blocks. A millwright in sawmills bread and butter is replacing bearings. A big sawmill is four stories up and the length of a football field, making getting a torch a great deal of extra work. I've broken 2 or 3 and lost that many over the years.

Oh ok I don’t know anything about how to tell the head size or anything lol I just look at the bolt if I see numbers I know it’s metric and if I see lines I know it’s standard and most I can just look at to determine which size socket or wrench I need to grab. I have no idea how to tell if a 5/8 would be the head size and would require a 15/16 socket.


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[Downwindtracker 2]

A rule of thumb is the head size is 1 and 1/2 bolt diameter so a 3/8 bolt takes a 3/8 + 5/16 = 9/16 socket. At 5/8", a lot of the time the socket breaks before the bolt.

S-K is more common on the prairies where MacClouds (sp) sold them.

 

[BlakeTheCarGuy]

A rule of thumb is the head size is 1 and 1/2 bolt diameter so a 3/8 bolt takes a 3/8 + 5/16 = 9/16 socket. At 5/8", a lot of the time the socket breaks before the bolt.

S-K is more common on the prairies where MacClouds (sp) sold them.

That’s good to know.


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[Provincial]

Math correction: 3/8 + 3/16 = 9/16.

 

[Downwindtracker 2]

Thanks , calculators were made for guys like me.

 

[Private Lugnutz]

Better yet, a Machinery's Handbook or bolt-and-wrench pocket guide! No math required!