Last week, we reported about the development of the STIHL MS 150. Now our journey continues. Today we’ll show you how we manufacture a chain saw at our plant. Most of the individual components the chain saw is made of come from STIHL plants around the world. The key components of the MS 150 – crankshaft, crankcase, piston, cylinder and engine housing – are made in house. Take a look behind the scenes.
The magnesium diecasting plant in Prüm-Weinsheim, Germany is one of the largest in Europe and supplies 24 million die-cast parts, including crankcases. This machine is used to process them.
Injection moulding is used to make plastic parts for the STIHL MS 150. Tank housings, engine housings, handlebars, fan housings, sprocket covers and much, much more are made using our state-of-the-art machinery at STIHL Plant 2 in Waiblingen, Germany.
The smallest crankshafts in the world of STIHL are produced at Plant 1 in Waiblingen.
The two halves of the crankcase from Prüm are assembled around the crankshaft. Then the piston is mounted onto the crankshaft.
When it comes time to assemble the flywheel and ignition module, it is important to make sure that the ignition gaps are set correctly so that the engine runs smoothly.
Once the engine has been bolted with the engine housing from the plastics manufacturing line in Plant 2, and once the serial number has been lasered on, the manifold is added and the tightness of the crankcase is tested.
The nameplate is mounted to the fan housing. Then the air filter and cover are assembled. Before that, the handlebars and carburettor were added and the fuel system was tested to make sure it was tight.
Every machine passes through a test and settings cabin before leaving the assembly line. This special machine found only at STIHL helps us achieve the perfect settings for our carburettors. It also tests all the safety features, such as the chain brake, throttle trigger lockout and idling speed.
Last but not least, the spiked bumper is added, if it is one of the chain saw’s features. After that, all that’s left to do is perform the final test, a visual check and a functional test and then add the stickers with safety and government approval information so that the STIHL MS 150 may be sold.
Get a closer look at marketing and sales in part three of our series “From an idea to a saw”.