DIY & Home Improvement

ret5hd

(21,320 posts)

2. yes, a number 7 drill is correct, BUT...

Sun Apr 14, 2024, 09:58 AM

Apr 2024

if i may make a suggestion:

if drilling by hand (as opposed to using a drill press or some other method that keeps your drill exactly perpendicular to the acrylic sheet)

use a #8 or even a #10 drill.

the acrylic sheet is “soft” enough…compared to steel etc…and using a hand drill…wobbly…the slightly smaller drill bit (#8 - #10) will give you a finished hole that will work perfectly.

don’t expect the finished tapped holes to be particularly strong though…acrylic is brittle and your sheet isn’t particularly thick.

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JT99

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Need help understanding tap & die sizes [View all] Nittersing Apr 2024 OP

1/4-20 tap must be missing from your set. amerikat Apr 2024 #1

OK - found it... nt Nittersing Apr 2024 #6

yes, a number 7 drill is correct, BUT... ret5hd Apr 2024 #2

Good tip about a smaller drill hole. Thanks. nt Nittersing Apr 2024 #7

Do you think a drill guide is worth it? Or is it mostly hype? Nittersing Apr 2024 #9

i won't speak to that... ret5hd Apr 2024 #10

and that item IS NOT what you need... ret5hd Apr 2024 #11

You are on the right track. 1. look closer at the tap. 2. look for an accompaning chart that details the layout of the.. usaf-vet Apr 2024 #3

This is how I finally found it... matching up the threads Nittersing Apr 2024 #8

Do. NOT. essaynnc Apr 2024 #4

I was surprised to see that there's a choice of tap drill sizes for 50% and 75% thread engagement. usonian Apr 2024 #5