In Jain Dharma, simply chanting the Navkar Mantra three times and saying “I pledge” is generally not considered a full pachkhan by itself.

A pachkhan usually means a formal vow/renunciation that includes:

• a clear intention,
• a specific restraint or promise,
• often a time period,
• and in many traditions, the vow is taken in an accepted traditional form.

So:

• Navkar Mantra chanting = auspicious devotion and purification.
• “I pledge” = a simple resolve or sankalp.
• Pachkhan = a more formal Jain vow of restraint.

If the pledge is very general, it is usually not a complete pachkhan. If it is a properly defined vow, taken with sincere intention, it may be considered a simple sankalp, but not necessarily the traditional pachkhan form.

In short: It is devotion and resolve, but not usually a formal pachkhan unless it is taken with proper Jain vow format.