The Case For Aerospace Aluminium
Why H-Masters is machined from 7075-T6 — the same alloy used in aircraft structural components — and what that means for hash purity.
May 12, 2026
Most grinders are cast from 6061 aluminium because it is cheap and easy to machine. 6061 is fine for door handles and bicycle frames. It is wrong for hash.
7075-T6 — the alloy we machine from — is three times harder, holds an edge longer, and resists the micro-galling that contaminates lower-grade grinders after a few hundred cycles. Aerospace specifies it for landing gear. We specify it for the same reason: zero tolerance for material failure under load.
The blank we start with is a 6.2kg billet. After eight machining operations across two five-axis centres, a finished H-Masters weighs 312 grams. Ninety-five percent of the material becomes chips. That ratio is the cost of doing it properly.
The result is a tool that will outlive the person who owns it. We back that with a lifetime guarantee — not as marketing, as engineering confidence.