Matrix - Thread Grinding
Matrix (Coventry Gauge and Tool Company) - a useful primer on the subjext: "Thread Grinding an Interesting Part of its History and Development".
MATRIX No. 37 (Types 1, 2, 3 and 4) Plain Thread Grinders. Parts Manual
MATRIX (Coventry Gauge and Tool Company) No. 37 (Types 1, 2, 3 and 4) Plain Thread Grinders. Parts Manual as Sectional Drawings.
Matrix (Coventry Gauge and Tool Company) Type GP900 Roll Grinder. Operator's Manual.
MC510GP Matrix (Coventry Gauge and Tool Company) Type GP900 Roll Grinder. Operator's Manual.