Boring Head Arbor, Tormach TTS

Fits the 7/8-20 thread on my boring head without any wobble, and the TTS taper seats solidly in the spindle. Machined a few test bores and it held rigid the whole time. Glad I grabbed this instead of rigging up an adapter.

The 7/8-20 threads engaged perfectly with my boring head, no wobble at all. Installation was straightforward, and the TTS fit gives a solid, repeatable grip in the spindle. This arbor does exactly what it’s supposed to for drilling precise holes.

Threads are tight and square, so the arbor seats without any wobble on the spindle. I’ve used it with a few different 7/8-20 heads and the fit is consistent every time. Solid little piece for the price.