How it's made | the hand winch | step 3: turning

After the products have been sawn to size nearly all products that are used in the winches of Gebuwin are turned on the CNC lathe machine.

How it's made | the hand winch | step 3: turning

Turning is a machining technique, in which the product rotates and thus executes the cutting movement whilst the tool is stationary. Turning is performed on a lathe. At Gebuwin, all turning operations are controlled by computer, on a CNC lathe (Computer Numerical Control).

Seven years ago, each part had to be placed manually in the CNC lathe. Now 90% of all parts used in Gebuwin’s products are placed in the CNC lathe by a robot. The robot runs on an average of12 hours a day (without a break).


Martijn performs many different operations on the CNC lathe. Here are some operations: flatten, (internal) drilling, (internal) turning, milling and (internal) cutting.

To get a better picture of the different operations, Martijn explains which operations are being done using the exploded view drawing of the brake head. The brake head is a very important part for all spur gear winches.


After sawing the custom size, the head is placed in the CNC lathe by the robot. The head is first leveled (1) on both sides. Then the outside is rotated and two holes are drilled (2) across the length and width of the head. The crank for the spur gear winches is placed by the width (3b), therefore both sides of this hole are seamed (4). At the front of the head, the drilled hole is rotated internally (5). When these operations have been carried out, the brake head is galvanized and then placed back into the CNC lathe for the final and most important operation: internal threading (6). Six threads are cut at the back of the head. Martijn told me that there are not many companies that can run six threads internally . The total processing time for one head is about 15 minutes.

Below you will see some other examples of products that went through the CNC-lathe machine:

After turning most of the parts go through to the next step milling (as you can see in above pictures).

Go to the milling process