If one is risk-averse and wants to avoid randomness, one can instead use the Crafting Bench recipe found in Delve mine. Using the Bench to craft sockets overrides the item levle socket restrictions. When you use an Orb of Fusing or a Jeweller's Orb on an item, the item's quality is no longer consumed. The way that quality affects the result has also been changed.

Jeweller's Orbs are primarily used to randomly change the number of sockets an poe items, subject to the limitations enforced by the item's item levle. If an item has some quality, each 1% quality improves the result by 1%. The sockets of an item reforged by a Jeweller's Orb also come with random links and colors. A Jeweller's orb will always roll a different number of sockets then the item had originally, but will not reroll an item with maximum sockets.