Widened double ball groove and angle contacting type

This series adopts bigger width for inner ring or outer ring than the standard
design, so that we can use the inner space for more complex and changeable
sealing design ,and we can get larger grease space. in this conditon ,Planter
gear train & rake piece could be suitable for sludge, dust, water, corrosion,
weeds, hard block and other more complex application environment .