Showcasing PTG Holroyd Precision's British-built Technologies a CIMT 2025
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PTG Holroyd Precision, the UK-based manufacturer of ultra-precise helical rotor and gear milling and grinding machines, will be showcasing its machine tool technologies at CIMT 2025 –
Stand E1-A011 21 – 26 April, 2025 Capital International Exhibition Center of China, Shunyi, Beijing the 19th China International Machine Tool Show.
CIMT is widely seen as the largest, most influential professional machine tool exhibition in China, and at Stand E1-A011, delegates looking to produce some of the world’s most accurate helical components will be able to find out more about PTG Holroyd Precision’s gear, rotor, screw and thread milling and grinding machines.
“PTG Holroyd Precision machine tools are already widely used by Chinese refrigeration and air compressor manufacturers,” comments sales director, Mark Curran. “This is largely due to their uncompromising levels of accuracy and reliability, as well as innovative features that make them exceptionally efficient to use.
“At CIMT 2025, we look forward to showcasing the latest models to join our machine tool line-up. These include our newly launched HG500, a machine that is quite possibly the world’s most versatile, large capacity helical profile grinder; our HG350-WG worm and gear grinding centre – and our recently upgraded TG Series of thread grinding machines. Visitors to stand E1-A011 will also be able to find out more about other recent machine tool innovations from PTG Holroyd Precision, such as our dual-capability roots-type blower and helical rotor milling machines.”
HG500: incredible flexibility in helical rotor production
The clear focus of the show from PTG Holroyd Precision’s perspective, however, will be its newly launched HG500 model – a machine developed to meet the needs of manufacturers with incredibly varying production requirements. Able to accommodate the largest, most energy efficient helical profiles, the HG500 will rough- and finish-grind rotors of as little as 50 mm in diameter, right up to a maximum 510 mm in diameter, 130 mm profile depth and 1,500 kg in weight. In standard form, the HG500 can utilise either a 500 mm vitrified dressable aluminium oxide grinding wheel for maximum flexibility in production strategies and product development, or use plated CBN roughing and finishing wheels for cost-effective volume production. Alternatively, for manufacturers who precision-grind the largest of helical components, a 600 mm vitrified dressable aluminium oxide grinding wheel option is available for maximum wheel life.
4EX-R-BL: redesigned from the ground up
Another PTG Holroyd Precision machine that is certain to generate considerable interest at CIMT 2025 is the company’s 4EX-R-BL roots-type blower and helical rotor milling machine. Newly updated, this dual-capability model now features a totally redesigned machine bed and worktable to enable components of up to 450 mm in diameter to be milled. Both the bed length and bed width have also been increased to give greater support against increased cutter forces. Whilst further supporting the machine’s greater milling capability (the original 4EX could produce parts of up to 420 mm in diameter), the machine bed height has been lowered by 150 mm, with additional buttress supports providing increased stability during flute milling on what was already an incredibly robust and steady machine. The maximum cutter width has been increased from 320 mm to 400 mm to accommodate particularly large rotor profiles, with Holroyd’s HSK 160 cutter spindle interface providing additional cutter rigidity.
“All in all, we’ve a great deal to present to visitors at CIMT 2025,” adds Mark Curran. “The PTG Holroyd Precision name has long been a benchmark for superior milling and grinding technologies amongst screw compressor and rotor manufacturers and we look forward to showcasing our very latest British-built innovations in Beijing.”
PTG. The first name in precision
Incorporating the brands of PTG Holroyd, PTG PowerstirÒ Friction Stir Welding and Holroyd Precision Rotors, PTG has established itself at the forefront of high-precision machine tool design, build and supply for specialised applications. The range includes advanced machine tools for the production of complex helical components such as compressor rotors, pump screws and high-accuracy gears, and PowerstirÒ machine tools for friction stir welding advanced alloys used in transport applications. With production facilities in the UK, USA and China, Holroyd Precision Rotors manufactures the special purpose, ultra-precision helical components used in a wide range of industries, including refrigeration, air-conditioning, gas and vacuum pumping, industrial air handling, aerospace, medical equipment, motion control, power transmission, power generation, oil & gas, fluid transfer and high-end automotive. PTG also provides advanced technical consulting services.
