Tightening the bearings on the tonearm of your Technics turntable can improve playback of your record collection. Bearings can loosen over time, which can reduce the tonearm's tracking accuracy in the grooves of the record. This article explains how to tighten the tonearm bearings.
Loosen the locking screw on top of the round pivot mechanism at the back of the tonearm. This is the housing for the tonearm bearings.
Loosen the screws on either side of the tonearm pivot (the circular housing where the tonearm extends).
Place 1-2 drops of machine oil on the bearings. Do not over-oil!
Tighten the small side screws gently until the screw tips barely touch the bearing housing. Do not over-tighten or you could damage the bearings and the housing.
Tighten the locking screw on top of the bearing housing.
Test the movement of the tonearm across the arc it makes over the turntable platter. The tonearm should move freely, without hesitation.