Posted: 12/24/2011 7:37:59 PM EDT
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To make this quick, I have a bolt that takes a 24mm size socket. I didn't have one available so I ordered a new one that should arrive in a couple days. I happened to grab my 15/16" size socket just to see if it would fit, and it did. 15/16" converts to something like 23.8mm - not quite a full 24mm, and yet this socket I had did fit onto the bolt. Is this an indication the socket wasn't forged properly to its exact measurements? To me, if the socket isn't the full 24mm, it should not fit onto the bolt, so is it typical for manufacturers to build in a little fudge factor? In my mind I would not want to put a lot of torque on a 24mm bolt using a 15/16" socket.
And for anyone wondering, I ordered the sockets from SnapOn. |
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"Fudge factor" = design tolerance to an engineer.
The socket has to be designed such that the smallest allowable socket will fit on the largest allowable nut/bolt. Tolerances on large tools/fasteners like you are talking about are also large: 0.020-0.030" IIRC. In the case of 15/16" versus 24mm, the difference is only 8 thou or so and there is enough overlap that the smaller wrench fits the larger hardware. Bottomline: many consider a 15/16" wrench an allowable substitute for a 24mm wrench; going the other way (larger wrench/smaller hardware) risks damaging the fastener. |
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Quoted: If a 24 mm socket and a 24 mm nut/bolt were each exactly 24 mm, you'd pretty much have to hammer the socket on and pry it off.To make this quick, I have a bolt that takes a 24mm size socket. I didn't have one available so I ordered a new one that should arrive in a couple days. I happened to grab my 15/16" size socket just to see if it would fit, and it did. 15/16" converts to something like 23.8mm - not quite a full 24mm, and yet this socket I had did fit onto the bolt. Is this an indication the socket wasn't forged properly to its exact measurements? To me, if the socket isn't the full 24mm, it should not fit onto the bolt, so is it typical for manufacturers to build in a little fudge factor? In my mind I would not want to put a lot of torque on a 24mm bolt using a 15/16" socket. And for anyone wondering, I ordered the sockets from SnapOn. The world aint perfect - and screws fall out. |
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Quoted:
Quoted:
Cummins diesels in Dodge's take a 3/8 drive ratchet inserted into the oil pan plug to drain the crank case.
24mm is standard land cruiser rear diff plug size, 15/16" fits nicely 
-hanko What size is that in Metric? 
10.5mm square bar stock, a hammer....and a shifting spanner....
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