[Zigûr]

In "Of Dwarves and Men" Professor Tolkien observes that the Longbeards, who we must remember were the only surviving Western House of the Khazâd by the Second Age, had most traffic with that large portion of the House of Hador which never ventured as far West as Beleriand. Hence, it would seem to me that the Longbeards at least were simply too far away from Beleriand to have contact with those Western Edain, High Men, who went to Númenor. Those who did encounter them, refugees from Belegost and Nogrod, fled East to Khazad-dûm. I may be mistaken, but it would appear that the re-establishment of mines in the remains of the Ered Luin did not occur until later, further limiting conflict with Western travellers at this time.

Regardless, when the Númenóreans did visit Middle-earth, they usually came south. Professor Tolkien makes a point of remarking in the same essay that "The first ships of the Númenóreans appeared off the coasts of Middle-earth about Second Age 600, but no rumour of this portent reached the distant North." Seemingly the Dwarves were simply too far away, in addition to being on the other side of Noldor territory which the Númenóreans avoided. Even during the youth of Aldarion in which the Men of Númenor were friendly with the Noldor, they "went but seldom further than the land of Gil-galad." (Aldarion and Erendis) Even Aldarion himself when in the north only sojourned "far in Lindon and the west of Eriador." So there would appear to be little or no concourse between the Dúnedain and the Dwarves at that point in their history. When the Númenóreans became imperialistic and warlike their power was, apart from the Faithful, still largely concentrated in Harad from Umbar southwards, very distant from any Dwarven lands, Western or Eastern, further limiting the possibility of contact. Only the Faithful ended up close to them geographically, by which time the doors of Moria had long been shut. Despite a long-standing relationship between Dwarves and Men in general, perhaps the first major encounter between these two particular groups was when both nations participated in the Last Alliance, well after Númenor itself had been destroyed.