  We present an implementation of all-diamond scanning probes for scanning
nitrogen-vacancy (NV) magnetometry fabricated from (111)-oriented diamond
material. The realized scanning probe tips on average contain single NV spins,
a quarter of which have their spin quantization axis aligned parallel to the
tip direction. Such tips enable single-axis vector magnetic field imaging with
nanoscale resolution, where the measurement axis is oriented normal to the scan
plane. We discuss how these tips bring multiple practical advantages for NV
magnetometry, in particular regarding quantitative analysis of the resulting
data. We further demonstrate the beneficial optical properties of NVs oriented
along the tip direction, such as polarization-insensitive excitation, which
simplifies optical setups needed for NV magnetometry. Our results will be
impactful for scanning NV magnetometry in general and for applications in
spintronics and the investigation of thin film magnets in particular.
