You should say "arrived exactly at" instead of "exactly arrived on" and include a subject for the verb. The rest is correct.
Arrived exactly at their cut off time is not correct grammar. It is a sentence fragment.A grammatically correct sentence would be, "They [or "The widgets we needed to complete the oscillating framizam" or whatever] arrived exactly at their cutoff [not cut off] time."
what college will get for cutoff 170
early cutoff
They used the Hastings' Cutoff
Lucin Cutoff was created in 1904.
Dodge does not use inertia/cutoff switches.Dodge does not use inertia/cutoff switches.
192 was last year's cutoff
100% is the cutoff
The duration of Meek's Cutoff is 1.73 hours.
C350 does not have a cutoff switch.
190 was the cutoff
Meek's Cutoff was released on 04/08/2011.