It is important to ensure that the tool holder has not been damaged and the parts are free from dust. To achieve the best performance, we recommend disassembling the tool assemblies and cleaning all male and female parts. Lubricate the parts with oil at least once a year.
Under certain circumstances, a Coromant Capto tool could get stuck in the spindle or clamping unit. This happens if the drawbar does not reach the ejecting surface.
- Chip mounted in center bolt hole is becoming loose. The chip must be fixed with Loctite, otherwise it can obstruct the clamping mechanism.
- Tool inserted too deep in the adapter due to lack of stop screws (old holders).
All new collet chucks and Weldon adapters have a permanent stop, therefore, a stop screw is not required.
Clamped tool, segments in correct
Drawbar hits the tool instead of the
ejecting surface when you insert the
tool. Segments will not be in correct
position. Tool can fall out during
When clamping tools with cylindrical shanks in old collet chucks that have a Coromant Capto coupling - with a hole through the center - be careful that the tool, if smaller than the hole through the adapter, is not inserted past the drawbar ejecting surface. This will cause misclamping, create a faulty clamping cycle and thus increase the risk of damage to the clamping mechanism.
By using a stop screw, this risk is eliminated and the function of both the adapter and the clamping mechanism is maintained. All adapters type 391.14 and 391.15 have an internal thread to suit the stop screw.