By 1897, he had invented the thread milling process and patented the first machine of its kind. A year later, ‘John Holroyd & Co.’ moved into much larger premises in Rochdale, Greater Manchester – a town that remains home to our global headquarters to this day.
The innovations kept rolling off the production line. Worm gears were produced, along with thread milling and grinding machines.
1920 saw Holroyd develop the first spuncast Super-Holfos (Holroyd Phosphor) and JH17 (John Holroyd 17) Bronze – offering high strength and an extremely low coefficient of friction. Then, in 1931, the company set the – still unbroken – world record for worm gear efficiency at 98.2% at the UK’s National Physical Laboratory.
From the day it was formed, John Holroyd & Co. pioneered ground-breaking technologies for the design and manufacture of highly complex helical components.
Today, as Precision Technologies Group, we innovate, inspire and strive to develop better, more efficient technologies for customers globally. We are proud recipients of four Queen’s Awards and export no fewer than 98% of our products, with our largest markets being the USA, China and Germany.
