mikehoover
Well Known Member
Is there an excepted industry standard for rounding rivet sizes up or down?
I have calculated the required length of many rivets during my build using the:
(1.5 x rivet diameter + metal thickness ) x 16 to get the length of the rivet in 16th inches. This leaves decimals so at first I would think you would always round up to the next size (half or whole as available). Sometimes this leaves the rivet longer than you would want, rounding up from a small decimal.
A few examples with a rivet diameter of 4/32":
1. Metal thickness: 0.064 calculates to a rivet length in 16th " of 4.024. Would you round this down to a -4 or up to a -4.5?
2. Metal thickness: 0.1280 calculates to a rivet length in 16th " of 5.0480. Would you round this down to a -5 or up to a -5.5?
3. Metal thickness: 0.2560 calculates to a rivet length in 16th " of 7.0960. Would you round this down to a -7 or up to a -8? (not sure they make 1/2 sizes after -5.5)
I guess my question is: is there a decimal point where it is technically correct and acceptable and industry standard to round down, ie, anything 0.010 or less for example, then round up it is greater than that?
I have calculated the required length of many rivets during my build using the:
(1.5 x rivet diameter + metal thickness ) x 16 to get the length of the rivet in 16th inches. This leaves decimals so at first I would think you would always round up to the next size (half or whole as available). Sometimes this leaves the rivet longer than you would want, rounding up from a small decimal.
A few examples with a rivet diameter of 4/32":
1. Metal thickness: 0.064 calculates to a rivet length in 16th " of 4.024. Would you round this down to a -4 or up to a -4.5?
2. Metal thickness: 0.1280 calculates to a rivet length in 16th " of 5.0480. Would you round this down to a -5 or up to a -5.5?
3. Metal thickness: 0.2560 calculates to a rivet length in 16th " of 7.0960. Would you round this down to a -7 or up to a -8? (not sure they make 1/2 sizes after -5.5)
I guess my question is: is there a decimal point where it is technically correct and acceptable and industry standard to round down, ie, anything 0.010 or less for example, then round up it is greater than that?