GMI Global - Users Group

Chapter 1: Measurement units

At GMI, precision starts with how we measure. We build and gauge our dies and punches using metric units, where the smallest increment we work with is a micron—

1 micron = 0.001 mm = 0.000039 inches.

Why does this matter?

Most American die makers work in thousandths (0.001”) or ten-thousandths (0.0001”) of an inch. These are respectable units, but they simply don’t offer the granularity or fine resolution that micron-level measurement provides. No one in the imperial system works in “0.039 thousandths of an inch,” even though that’s what 1 micron actually is.

Today I want to tell you the story the way it actually happened. No marketing, no polished corporate BS. Just the truth, because you deserve it.

Back in 2019, we (two engineers with zero shooting experience) had:

·       No track record

·       Never owned an airgun

·       Never fired a single pellet or slug in our lives

·       No idea we would ever end up in tooling

Thank you all for joining the GMI community. We at GMI engineering welcome you all.

Dear members,

We are excited to launch this dedicated forum as a collaborative space for generating, sharing, and archiving valuable insights from the community on all aspects of PCP airguns and related disciplines.

Key focus areas include (but are not limited to):

• PCP’s, tuning, and performance

• Slug development, testing, and ballistics.

Welcome to the group! You can connect with other members, get updates, share videos, share your experiences and more!

This is the general group on the forum.