Dual contact steep taper / Taper face / DUAL Contact
Basic concept
The Dual contact steep taper system is based on the most current available standards in ISO 7388-1 (ex. DIN 69871) und ISO 7388-2 (ex. JIS B6339).
A conventional steep taper tool holder is supported on a reference diameter called the gauge line, on the contrary, a Dual contact tool holder is supported on the flange face, which brings remarkable improvements to rigidity. KEMMLER Dual contact steep taper surpasse other spindle concepts while offering interchangeability with existing machines and tool holders.
- More stability compared to taper contact toolholders
- Excellent repeatability
- Premium finish and dimensional accuracy
- Extended tool life
- No surface corrosion due to heavy cutting
Can I use standard taper holders in a double contact spindle?
Face contact holders must remain in contact with the spindle surface to ensure accuracy and proper interface between the toolholder shank and the tool spindle taper.
When using standard steep taper tools in a double contact spindle, chips and debris can accumulate on the face if face contact is not maintained.
These contaminants can then cause damage to the spindle face and/or the double contact toolholder.
We therefore do not recommend the use of standard steep taper holders and double contact tool holders in the same machine spindle.
If the machine has a double contact spindle and is to be used with double contact toolholders, all toolholders should be double contact. Even if, in principle, mixed use is possible.
