Tubing Preparation

Cutting cones on high-pressure tube

On the tube side, high-pressure connections consist of a 58° or 116° cone, which serves as the sealing surface, as well as a left-hand thread for securing the pressure ring.

It is important during tube processing to first cut the cone and then the thread, as otherwise the initial thread turns could be damaged by the cone cutting tool.

To cut the cone, please proceed as follows:

1. Cut the tube to the required length, e.g., with a hacksaw."
2. Secure the cutting tool with the tab (A) in a vice, ensuring that the ratchet (B), handwheel (C), and crank (D) are freely movable and accessible.
   
   
    Figure 1: baromax Cone Cutting Tool
   
   
3. Turn the handwheel counterclockwise until it is approximately 16mm away from the tool housing.
4. Ensure that the cutting edge is clean and that there are no chips left in the housing, as they could damage the surface of the cone to be cut.
5. Open the clamping jaw by turning the cap or ratchet counterclockwise. The ratchet's rotation direction can be adjusted using the small lever on the front side.
6. Insert the tube into the clamping jaw until its end is approximately 1mm away from the cutting edge.
7. Close the clamping jaw by turning the ratchet.
8. Apply a medium amount of cutting paste through the opening onto the cutting edge.
9. Turn the crank continuously and evenly in a clockwise direction. It is important to keep the cutting edge moving evenly and without interruption at all times while it is in contact with the pipe.
10. Now slowly turn the handwheel clockwise so that the cutting edge is guided against the end of the pipe and the cutting begins.
11. If you need to interrupt the cutting process, e.g., to remove chips, continue turning the crank evenly clockwise until the cutting edge is no longer engaged with the tube by turning the handwheel counterclockwise. In this way, you prevent the formation of chatter marks, which make sealing the cone impossible.
12. When the cutter has been moved forward far enough to also cut the vertical tube end, the cone is finished, and the cutter can be disengaged by turning the handwheel counterclockwise (see also point 11).
13. Loosen the clamping jaw by turning the ratchet.
14. Remove the tube and clean the tool, especially the cutting edge.

Cutting threads on high-pressure tubes

To cut the cone, please proceed as follows:

1. Cut the tube to the required length, e.g., with a hacksaw.
2. Cut the cone using the baromax cone cutting tool.
3. Securely clamp the tube.
   
   1. The baromax cone cutting tool is very well suited for this. Simply loosen the handwheel (C) completely so that you can pull out the crank, handwheel, and cutter. The clamping jaw then serves as the ideal clamping device.
   2. If you clamp the tube in a different way, for example in a vice, make sure to use soft jaws or pads to avoid damaging the tube.
4. Apply a moderate amount of cutting paste to the tube.
5. Guide the tool with the pilot hole forward over the end of the tube.
6. Press the tool firmly against the tube. The best way to do this is to press the tool centrally with the palm of your hand.
7. Turn your hand counterclockwise until you feel that the cutting tool engages and the cut begins.
8. Continue cutting the thread by turning the tool at the handles counterclockwise. The required number of rotations can be found in the following table:
   
   1/4"  Tube size: 13 rotations
   3/8" Tube size: 16 rotations
   9/16" tube size: 15 rotations
9. Remove the tool and clean it, especially the cutting edges.

Figure 2: baromax thread-cutting tool.

Figure 3: baromax thread-cutting tool - Guide hole.

Do you have any questions or need personalized advice? We're always here for you: baromax@weh.com