“The subcontracting machine shop for satisfied customers,” said one of our clients when we went through our service offerings. We provide a wide array of services to ensure that we can complete the entire job. This is why so many customers choose to concentrate their subcontracting purchases to us. It’s easy when you can get everything from the same place, cost-effectively and reliably. Our diverse range of joining methods and skilled staff stand out in this regard. We inform the customer about what is achievable and what is not. We can also advise on how to modify the structure for the success of the job. This saves the customer time and enhances cost-effectiveness in the finished product.


The maximum width for mangling is 2050 mm, and the maximum material thickness is 7 mm for steel. Our typical mangling work involves mangling pierced and laser-cut column sauna stove billets. We also mangle thicker materials, often when producing different kinds of tanks after mangling and subsequent welding. In addition, mangling is suitable for creating e.g. curved chain guards. The end use of mangling also includes parts for agricultural machinery.


Thread cutting is a very typical additional step for a component. We can create threads of any size in any material, as long as it is technically feasible. The most common and often cost-effective method is to create threads in the component using a punch press or a combination machine. We sometimes create threads manually in components as well. For thick laser cuts, we create threads using a machining centre. We also create threads in thin sheets using a machining centre. An example is an M14 thread in 6mm material.

Our experts assist you in selecting the appropriate method for threading in the component, ensuring you always get the right and cost-effective solution. Sometimes upformings are not desired in the component. In these cases, we use PEM inserts with both male and female threads.


Our sawing service as a support function has emerged in response to the need to combine sheet metal parts and aluminium profiles. Our assemblies often require sawing services. We cut various profiles to size from bars before assembly or welding.

Frequently, cutting is performed on various tubes used, for example, in welding assemblies. Depending on the quantities, we either saw the tubes ourselves or purchase a batch that’s already cut.

Corner Forming

In our stock of machinery, we have a Corner Former corner forming machine. It’s used for forming closed angles with thicknesses of 1-2 mm. The height ranges from a minimum of 10 mm to a maximum of 28 mm. The Corner Former is well-suited for angle forming without traditional welding. With this machine, solid angles can be formed without seams. A typical component that undergoes angle forming is various types of sewage drains, for instance.

Countersunk holes

When you want to ensure that the of a screw, or a bolt head, sits flush with the material’s surface, you use a drill bit roughly the size of the screw head’s diameter and drill a hole a few millimetres deep at the screw’s intended recess point. There are also tables available for standard screws and special screws that specify the size and angle of the countersunk hole. Countersunk holes can be created directly on a punch press by piercing or alternatively using a pillar drill for machining.


Our offerings include pemming, or installation machines for rivet nuts. A typical application for PEM-inserts is creating threads in various directions. Pemming is well-suited for thin components where threading is desired without material deformation. This type of work is often good to do with inserts, as mechanically threading might be impossible for one reason or the other. Sometimes, when upforming can’t be used or aren’t suitable, PEM-inserts can be used to achieve the threading.

Typically, pemming is done in sizes ranging from M2 to M6, in both male and female threads. Our stock includes a wide variety of different PEM-inserts. In most cases, pemming process can begin immediately without having to separately order and wait for inserts to arrive at the factory.

PEM-inserts can be installed in various materials such as copper, aluminium, stainless steel, acid-resistant steel, and galvanized steel.


We use riveting extensively as a joining method. Riveting is suitable, for example, for connecting ventilation products. Riveting is also known as pop riveting. In our stock, we have several machines for riveting. Our inventory includes a comprehensive range of different rivets. Our personnel are experts in the riveting process, capable of determining the appropriate rivet type and quantity based on desired strength.

Spot Welding

A commonly used joining method is spot welding. A typical spot-welding task for us would be for example connecting ventilation products. For instance, we weld pipe-like HVAC joint parts to sheet metal components. Examples of such tasks are air distribution boxes and HVAC ceiling frames. Additionally, we use spot welding to join various HVAC grilles to duct components. In our factory, riveting, spot welding, inserting inserts, and small-scale assembly work all take place within the same working area. Sometimes, due to the geometry of a component, it’s necessary to change the joining method, and we can do this quickly and cost-effectively.


At Stremet Oy’s factory, we have four standard packaging sizes: small package, power pallet, Euro pallet, and long pallet. Occasionally, projects require custom packaging and packaging design. In collaboration with JS-Pack, which operates in the same facility, we offer this service. We can rapidly and cost-effectively create transport boxes or packaging tailored to your specific product. Packaging is always done according to the customer’s instructions. If packaging instructions are not provided, we follow the best practices accumulated by our shipping professionals over the years.


Logistics are handled according to the customer’s preferences. Typically, the delivery term is EXW Salo, where logistics are managed by the customer’s freight service to the desired destination. Often, freight has not been specified, in which case our experts arrange a secure and cost-effective freight and invoice it to the customer upon order placement.

By Your Side Through the Entire Production Process – From Sheet Metal to Product

We provide our customers with expert support and co-operation throughout the entire project. We are ready to assist you in the design phase and offer technical guidance to ensure the end result meets your expectations.

Our aim is to establish long-term partnerships with our customers and ensure that every collaboration is successful.

What kinds of materials do we process? What information should be provided at the beginning of a project? How do we handle deliveries?

Answers to these and many other questions related to processes, services, and production can be found on our Frequently Asked Questions page, where you’ll also find various documentation and materials.

See how sheet metal transforms into finished products at our factory.

Let’s kick off a project together – get in touch.

Janne Männistö

Business Director
+358 44 7739 452


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