davidpettersson
Member
- Joined
- Sep 14, 2020
- Messages
- 6
Hey everyone,
I am based in eastern Canada, and I am surprisingly having a hard time finding #20, #30 and #40 drill bits over the counter. It would seem I need to special order from my local tool store. It is for my CH 750 project.
My question is if I dare use the fractional drill sizes instead. I did a small comparison.
Comparison #20
#20 = 4.089 mm
5/32 in = 3.96875 mm
Difference is 0.12025 mm (approx 2.9%)
Comparison #30
#30 = 3.264 mm
1/8 in = 3.175 mm
Difference is 0.089 mm (approx 2.7%)
Comparison #40
#40 = 2.489 mm
3/32 in = 2.38125 mm
Difference is 0.10775 mm (approx 4.3%)
So in all cases, the difference is that the holes with fractional drill bits are 0.1 mm smaller, or about size of a human hair.
I don't want to mess up when drilling. Should I just order a batch of the gauage drill bits?
I am based in eastern Canada, and I am surprisingly having a hard time finding #20, #30 and #40 drill bits over the counter. It would seem I need to special order from my local tool store. It is for my CH 750 project.
My question is if I dare use the fractional drill sizes instead. I did a small comparison.
Comparison #20
#20 = 4.089 mm
5/32 in = 3.96875 mm
Difference is 0.12025 mm (approx 2.9%)
Comparison #30
#30 = 3.264 mm
1/8 in = 3.175 mm
Difference is 0.089 mm (approx 2.7%)
Comparison #40
#40 = 2.489 mm
3/32 in = 2.38125 mm
Difference is 0.10775 mm (approx 4.3%)
So in all cases, the difference is that the holes with fractional drill bits are 0.1 mm smaller, or about size of a human hair.
I don't want to mess up when drilling. Should I just order a batch of the gauage drill bits?