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Message No. 26438, Started by mcneilinstruments on 12/26/21

I’m trying to drill a hole through a steel plate, approx 5mm thick, I’ve started with a smaller bit and then changed to a bigger one, this went through quite good, but, I need the hole to be slightly bigger, enough to get a 10mm bolt through. I therefore changed the bit to another, slightly bigger but when I try to drill into the hole the drill is literally bouncing off, I’ve given it a few goes but it continues to happen.
Any help where I’m going wrong would be greatly appreciated.

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Follow-up Messages (2)
That's nice.
No. 26615, Posted by night_fury1212 on 05/10/22, 05:34 PST.
wow
No. 26598, Posted by oliversbrookss on 04/26/22, 16:23 PST.
Glossary
Metal 3D Printing Design Guide

Direct Metal Laser Sintering (DMLS) 3D printing for parts with reduced cost and little waste.

Essentials of Manufacturing

Information, coverage of important developments and expert commentary in manufacturing.

STEM Career Outlook

Wages, employment opportunities, and growth projections for STEM jobs.

Injection Molding Design Guide

Guide for high quality and cost-effective plastic injection molding.