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Grinding camshafts at Triumph with the Lean Selection cam from JUNKER

Precision production for the perfect ride

Triumph is a well-known name among motorcycle enthusiasts. The reliability and lasting value of the bikes is thanks to their high-quality production. Triumph uses the Lean Selection cam high-speed grinding machine from JUNKER to grind its camshafts.

“The models in the Modern Classics line are currently our most popular motorcycles – for example the Thruxton or Bonneville,” said Jack Sellers, Production Engineer at Triumph Motorcycles Ltd. in England. The Modern Classics line is made up of new motorcycles with current technology in a timeless design. These classic bikes make for reliable companions, both on the roads where adventure lies around every corner and on leisurely rides where the rider can enjoy the synthesis between man and machine.

What’s more, as of the 2019 season, Triumph Motorcycles are now the exclusive engine supplier to the FIM Moto2™ races, bringing their many years of experience in high-end engine building to the table.

„It is very important to us that the machines are reliable.“

JUNKER meets the highest quality requirements

The high-quality finish of the camshafts for the engine plays a key role. To achieve this, Triumph uses four Lean Selection cam machines from JUNKER across the Group. In addition to its headquarters in England, Triumph also has production sites in Chonburi, Thailand. The motorcycle manufacturer produces around 56,000 bikes each year at both locations and has had a positive experience with the Lean Selection cam for high-speed grinding. Jack Sellers said: “It is very important to us that the machines are reliable. The camshaft quality must always meet the high requirements that Triumph expects of its components. Thanks to the tried-and-tested Lean Selection cam we can maintain a high level of quality.” And this can also be achieved in three-shift operation, seven days a week.

The Lean Selection cam from JUNKER is the right choice for companies that require flexible production. The available grinding operations include cylindrical and non-cylindrical grinding. Cylindrical, convex, concave, polygonal or elliptical workpiece geometries can be ground – with chamfers or radii if needed. It is particularly important for the motorcycle manufacturer that cams and bearings can be ground on the same machine in a single clamping set-up.

„The trainers from JUNKER were highly motivated and capable.“

Quick changeover for new workpieces

Triumph has stringent requirements when it comes to flexible production. Technical improvements to components mean that the grinding process needs to be constantly re-adjusted. The Lean Selection cam makes it quick and easy to produce this wide range of high-quality parts. Small series require rapid machine changeover, which is where the machine’s easy operation proves itself. “Our setup engineers who work with the Lean Selection cam can change over the workpiece and associated program,” said Jack Sellers.

He goes on to mention an example of rapid support for unusual requirements: “We grind very small concave radii on the camshafts. Due to a flange positioned in the center of the workpiece, we had to come up with a solution to ensure that the spindle housing did not collide with the workpiece. JUNKER supplied an integrated turning station – a clever, custom-made solution.”

Extremely pleased with the service

JUNKER assists with the integration of new machines. Triumph employees completed training for programmers so that the new machines would be up and running right away. Jack Sellers said: “The trainers from JUNKER were highly motivated, capable and explained everything. This meant that we had a good understanding of the machines right away.” The Production Engineer is also highly satisfied with the service in England and Thailand. “If we have any inquiries, JUNKER is quick to respond and suggest solutions. As a whole, we have had a very positive experience with JUNKER Service.”

Grinding machines