The Pro-Ject 81g Counterweight (037) is a genuine replacement counterweight for Pro-Ject tonearms that use the 037 counterweight series. At 81g, this counterweight sits in the mid-range of the Pro-Ject counterweight lineup, and is designed to balance the tonearm correctly when used with cartridges that require this mass for accurate tracking force setting.
What a Counterweight Does
The counterweight sits at the rear of the tonearm tube, opposite the cartridge. By sliding the counterweight along the stub and rotating it, you set the downforce that the stylus exerts on the record groove. Setting the correct tracking force is essential: too little and the stylus will skip or mistrack; too much and both the stylus and your records will suffer premature wear. Each Pro-Ject tonearm counterweight carries a numerical part code that identifies the correct mass and thread specification for that tonearm family.
81g Weight and Tonearm Compatibility
The 037 series counterweight weighs 81g. The 037 part code refers to the thread specification and mount type, ensuring a precise fit on compatible tonearm rear stubs without play or vibration. Please verify the correct counterweight part number for your specific tonearm before ordering.