SharpAI help me with the practice problems on this page
Let's walk through these three practice problems together. What answers do you have written down so far? If you are stuck, we can find each one directly by looking at the specific guidelines in this lesson.
For the first question about the minimum clearance per side, take a look at the section on the one rule behind all of it. It explains that a screw needs room to pass, and it defines the exact minimum clearance required on each side—which is 0.15 mm—to absorb errors like drill runout, positioning offsets, and paint.
For the second question about the M3 clearance hole, you can find this in the standard sizes table. Look at the row for M3 x 0.5; it lists the tap drill as 2.5 mm, and the close clearance hole size is 3.2 mm, which is the standard size you want to use here.
For the third question about what to do with a pattern of three or more holes, check out the section on when 0.3 mm is not enough. It explains that trying to hold tight tolerances on multiple round holes makes assembly nearly impossible, so you should make one hole close fit to locate the part and slot the rest.