Machining 101: Gib Adjustments

man using a milling machine

The milling machine may be a heavy duty equipment, but it still needs considerable maintenance to ensure output quality and workplace safety. Not only do you need to equip it with quality NSK angle heads, you also need to know how to adjust its gib.

man using a milling machine

There are two types of gibs: straight and tapered, so the situation for adjustment may vary in different machines.

Straight gibs

Screws spaced out along its length are the main characteristic of straight gibs. These are the things you have to adjust to push the gib inwards and increase contact with sliding mechanisms.

Tapered gibs

Tapered gibs utilize one or two screws located at the ends of the tapered gib. One of the screws serves as an adjustment while the other locks the mechanism in place. One end of tapered gibs is wider than the other, thus creating uneven contact between sliding mechanisms.

Adjusting table gibs

Loosen first the similar gib screw on the table’s right side before you re-tighten the gib screw on the opposite side so you can adjust or lock the gib in position.

Adjusting saddle gibs

In the case of saddle gibs, loosen the rear gib screw on the saddle slide way, after which you have to tighten the front screw again to lock or adjust the gib in the desired position.

As metalworking relies heavily on machinery, it’s important to know basic things like adjusting the gib to create output that is of excellent quality.