Zero tolerance bolt/pin holes according to ASTM Standards
Zero tolerance bolt/pin holes according to ASTM Standards
(OP)
My team is designing a pin connection which requires that the pin hole diameter is equal or 0.5 mm greater than the pin dimater. Is there any reference in ASTM Standards about a minimum pin or bolt hole diameter? Table 3.1 specifies the maximum bolt holes according to each bolt diameter but does not give any minimum limit. I would also appreciate if you can give me any guidance regarding the constructability of such zero tolerance pin/bolt connections.






RE: Zero tolerance bolt/pin holes according to ASTM Standards
Why do you need such a tight hole/pin fit? What other pieces/parts does this pin go through, and are the pin fits that tight in these parts too? Can you hold tolerances in the various parts well enough to make everything fit-up? When you mention ASTM stds. I suppose you are looking at their stds. for structural bolting and they are most worried about some max. hole slop which still allows a bolt or group of bolts to act together and with some consistency in a structural steel joint. The other bible-like std. is the “Specification for Structural Joints Using High-Strength Bolts,” by The Research Council on Structural Connections (RCSC). ASME and others will have some of their own stds. too.
There is nothing that prevents a press fit in the hole for a pin/bolt, as long as you design for this condition, and can actually build it and make it work. On bearing pins, a smaller difference in the hole and pin diameters actually improves the bearing stresses btwn. the two. That’s a Hertz bearing stress problem.
RE: Zero tolerance bolt/pin holes according to ASTM Standards
Bridge construction uses more pin-fit construction than buildings so try the AASHTO standards for tolerances.
RE: Zero tolerance bolt/pin holes according to ASTM Standards
for bigger bolt ( 1 inch or more)it is 3 mm
best regards
Klaus
RE: Zero tolerance bolt/pin holes according to ASTM Standards
RE: Zero tolerance bolt/pin holes according to ASTM Standards
dozer: Yes I meant Table J3.1 in Manual of Steel Construction indeed.
RE: Zero tolerance bolt/pin holes according to ASTM Standards
that's good...no reduction of bearing according to Euro Code ....
best regards
Klaus
RE: Zero tolerance bolt/pin holes according to ASTM Standards
RE: Zero tolerance bolt/pin holes according to ASTM Standards
3 mm more for a 30 mm bolt is NOT oversized.....it is standard ...
best regards
Klaus
RE: Zero tolerance bolt/pin holes according to ASTM Standards
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