I used it to press a clutch-brake onto the shaft of a CNC turret press and it worked perfectly. I had to change out the funky hydraulic fittings it came with so I could use it with my pump. I don't know the tonnage I reached but it took quite a lot of force to move this clutch which is a tight fit to shaft. Surprisingly very high quality and as a bonus it has a hollow ram, so it may be used for pulling too. happy customer.