PTG Precision Engineers – an engineering specialist with over 40 years of experience serving the nuclear, aerospace and energy sectors – has taken a significant step towards production automation with the installation of a SMEC NS2000 bar-fed turning centre supplied by Dugard. The investment represents the company’s first foray into automated machining and comes in response to a growing order book and persistent challenges in recruiting skilled machinists.

Over the past 12 months, PTG had experienced a significant upturn in demand, creating operational pressures that existing production capacity struggled to accommodate. When PTG mentioned its interest in a bar-fed lathe to Dugard, the trusted machine tool supplier put together a comprehensive package.

PTG selected the SMEC NS2000A, a bar-fed turning centre that combines accessibility with precision. The NS2000A is equipped with a 6-inch chuck and offers a maximum turning diameter of 310 mm, with a swing over bed of 565 mm.

PTG’s new SMEC NS2000 has been integrated with an LNS bar feeder. The transformation in production has been dramatic. Previously, PTG was processing batches of 25 expanding mandrills at a time on conventional equipment. With the SMEC NS2000 and LNS bar feeder combination, the company now runs batches of 350 off – a 14-fold increase in batch size that has fundamentally changed stock availability and production scheduling.

“The machine requires very little set up,” notes production manager Jim Adkins. “In the morning, we may spend an hour setting the bar feeder, loading it up with bars, putting the programs through again. Then the guys go back and run our other machines. They only return to remove parts from the catcher every half an hour.”

More information www.dugard.com

The decision to set up a turned parts subcontracting business at the start of the worst economic crisis in living memory has paid dividends for Yian Stavrou and George Dingley, joint owners of Luton-based Sub-CNC Precision. Supporting their successful evolution from earning a few thousand pounds a month in 2008 to turning over a predicted £3m in the company’s current financial year has been, from the very beginning, continued investment in twin-spindle, multi-axis, bar-fed lathes supplied by Citizen Machinery UK.

Over the years, the ISO 9001-accredited and JOSCAR-registered subcontractor has bought 25 such machines, part exchanging a few to leave 21 on the shop floor as of the end of 2025. Two-thirds are Cincom sliding-head models for producing parts from 0.5 to 38 mm in diameter, while the remainder are Miyano fixed-head turning centres. Many run lights-out from 18:00 to 07:00. 

In 2017, the introduction of Citizen’s proprietary LFV (low-frequency vibration) chip-breaking software in the Cincom control massively assisted unattended machining. The big advantage of the function is that it can be programmed using G codes to switch on and off during a cycle, added to which it also has different modes to adjust the size of the chips. The function is disabled for parts of the cycle where enhanced chip-breaking is not necessary.

As to the fixed-head Miyano lathes, which produce parts from bar ranging from 8 to 65 mm in diameter, or from billet up to 200 mm diameter, they started arriving at the subcontractor’s factory in 2012. The latest to take its place on the shop floor, alongside a new Cincom L20-XLFV, is a Miyano BNE-51MSY.

More information www.citizenmachinery.co.uk