Holroyd Precision Limited

Harbour Lane N
Rochdale, OL16 3LQ GB

Precision Technologies Group


A Message from Holroyd Precision Limited

Company Profile

PTG. The first name in precision.

Special Message

With an engineering history spanning over 100 years Holroyd is unique.

As Seen In Modern Machine Shop

Holroyd EX series

Rotor Milling Machines Efficiently Produce Helical Screw Profiles, Worm Shafts
Holroyd EX-series CNC rotor milling machines are designed for high speed, precision and reliability.

Holroyd Precision Appoints U.S. Sales Representative
The Cincinnati-based distributor will offer machine tools for manufacturing helical components.

Holroyd Profile Management System software

Profile Management Software Aids Production of Helical Components
Designed for use with its grinding machines, Holroyd Precison's Holroyd Profile Management System (HPMS) is an optional desktop suite of software for helical component design and management.

PTG Signs Agreement with University
A memorandum of understanding has created two new positions within the University of Huddersfield and has implications for future research and development.

Helical Profile Milling Machine Enables Dry Machining
Holroyd Precision’s EX series 8EX helical profile milling machine is capable of producing complex components with helical screw profiles and gear parts such as worm shafts ranging to 850 mm (33") in diameter.

Holroyd Precision Apprentices Recognized
Four apprentices from Rochdale Training in the UK received awards.

This image shows the interior of C & B Machinery’s DG-2H double-disc grinder designed for rigid, high-production applications. The grinder is available with grinding wheels ranging from 584 to 1,067 mm (23

February 2014 Product Spotlight: Grinding
Click through this slideshow to see the grinding products featured in February's Modern Equipment Review Spotlight section.

Holroyd Precision WG grinding station

Grinding Stations Designed for Worm Gear Manufacture
Holroyd Precision’s WG grinding stations are designed to provide high levels of accuracy and finish in worm gear shaft production.

PTG Heavy Industries Powerstir friction stir welder

Friction Stir Welders Capable of Jointing Difficult Alloys
Precision Technologies Group (PTG) Heavy Industries will display its Powerstir friction stir welder.

Holyroyd Zenith 400 grindng machine

Grinding Machine Accommodates Range of Abrasives
Holroyd’s Zenith 400 helical profile grinding machine has the capability to use three different grinding abrasives: vitrified aluminum or silicon oxide; “diamond hard,” plated CBN; and vitrified, dressable CBN.

Rotor Grinder Handles Helical Screw Components
The TG 350E rotor grinding machine from Precision Technologies Group’s Holroyd Machine Tools and Components division is designed to grind a variety of helical screw components.

Grinder Combines Three Technologies
The Zenith grinding machine uses three grinding technologies—aluminum oxide, "diamond-hard" plated cubic boron nitride (CBN) and vitrified CBN—to grind rotors as large as 420 mm.


Precisely Grind Helical/Spur Gears
The Holroyd gear and thread grinder, GTG2, is designed for precision grinding of helical/spur gears in diameters ranging to 350 mm. According to the company, the machine can grind small batches of these gears to high levels of DIN and AGMA quality standards.

Screws for compressors

Getting In Gear With An Automated Cell
This production cell embodies several unusual but very effective concepts for keeping process variables under control with little operator intervention.

Product Categories of Holroyd Precision Limited

Deburring Equipment
Deburring Machines
Gear Cutting Tools
Gear Deburring Machines
Gear Grinding Machines
Gear Inspection
Gear Inspection Equipment
Gear Shaping Machines
Grinding Attachments & Accessories
Grinding Machines, Profile
Grinding Machines, Thread
Grinding Machines, Tool, Cutter & Drill Point
Milling Machines, Bed-Type
Retrofitting, Rebuilding, Remanufacturing Services
Superabrasive Machining Systems
Thread Cutting Machines
Thread Milling Cutters

Trade Names


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Rotors from 10mm to 1m or larger

Special Message

With an engineering history spanning over 100 years Holroyd is unique. Not only do we manufacture bespoke high precision components such as Rotors, Superchargers and Metering Pump Screws but we also make and sell the machine tools that produce them. This synergy means that in essence Holroyd is always its own customer, a situation that provides an ongoing database of manufacturing experience, which in turn benefits users of Holroyd products world-wide. As well as designing and manufacturing a range of Helical profile milling and grinding machines our product range covers Superabrasive machining systems, Thread grinders, DIN 4 to approaching DIN 1 standard Gear grinding machines and Gear, Thread and Rotor Support machines. From within our state-of-the-art manufacturing facilities we supply to major OEM's globally components produced on our machine tools. These include loose rotor sets in any size and quantity for use in applications as divers as Air Conditioning Systems to Transcontinental pipelines, Compressors and Engine Superchargers. We maintain a worldwide comprehensive support, maintenance backup and technical development and manufacturing advice service network, all readily available, just a phone call away, to ensure continuity of your production. Remember whether you're manufacturing or purchasing precision-machined components, Holroyd has a total solution for you.

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Company Profile

PTG. The first name in precision.

Incorporating the world-class brands of Holroyd, Binns & Berry, Crawford Swift, PTG Heavy Industries and Precision Components, PTG has established itself at the forefront of high precision machine tool design, build and supply. The PTG range includes grinding machines for rotor, thread and gear operations, rotor milling machines and lathes producing ultra precision components to serve a wide range of industries from aerospace, medical and mould tool & die to marine, power generation, oil, gas, steel and high end automotive. The Group has developed some of the most sophisticated, bespoke software on the market from simple rapid set and intuitive user interface right up to on-machine 3D scanning, with automatic profile adjustment and offers technical consulting services, full turnkey packages and a remanufacturing facility for large capacity specialist machines for the steel, oil and gas and aerospace industries. And, across everything the group does, its watchword is precision. In fact, precision's not just PTG's middle name. It's its first name too. Precisely what's needed.