Ermes Inverter pulleys with ceramic bearings D30xH11 (pair)

Ermes Inverter pulleys with ceramic bearings D30xH11 (pair)

Pair of inverted roller speargun pulleys with ceramic ball bearings. Designed to withstand high loads. 

These pulleys hold approximately 122 kg. at rotation speed of 38000 rpm. It is exactly the low rotation speed that causes  the major power losses in the inverted roller systems, but these pulleys practically eliminate the problem. 

Dimensions:

• Shaft: 6 mm.
• Large diameter: 30 mm
• Small diameter: 26 mm. 
• Width: 11 mm.
• Weight: 19 g.

To prolong the life of the pulleys, please rinse and soak in fresh water after each use to clean sand and dirt and allow dispersion of the salt crystals.