Do you know RUBFLEX clutch brand? I got below information from Google:

Established in 1975, that manufactures a variety of pneumatic clutches and brakes for heavy industrial machinery like drilling rigs, rock crushers, and large mechanical presses. The brand is known for offering a cost-effective and reliable alternative to premium brands like Airflex or WPT/Wichita/Twin Disc, providing interchangeable models with similar performance standards. and if you need the clutch or clutch spare urgently, you can call Rubflex , Rubflex clutch has most of items in stock.