Runstar specializes in designing and manufacturing high speed bearings for dental handpiece. The inner ring and outer rings are made of 440 stainless steel, and the balls are made of stainless steel(440) or ceramic(Si3N4) at request, and the cages are made of imported TORLON materials. The precision tolerance is ABEC-7(P4). The rotation speed of dental bearings can be 350000-450000 rpm under the air pressure of 200-250kpa.

PART NUMBERSEAL TYPEBore diameter(d)Outer diameter(D)Width(B)MEMOS
SR144TLOPEN3.1756.352.38STEEL BALLS
SR144TLNOPEN3.1756.352.38CERAMIC BALLS
SR144TLWOPEN3.1756.352.78STEEL BALLS
SR144TLWNOPEN3.1756.352.78CERAMIC BALLS
SR144TLZSingle shield3.1756.352.38STEEL BALLS
SR144TLZNSingle shield3.1756.352.38CERAMIC BALLS
SR144TLZWSingle shield3.1756.352.78STEEL BALLS
SR144TLZWNSingle shield3.1756.352.78CERAMIC BALLS
SR144TLZ1Single integral shieldral shield3.1756.352.38STEEL BALLS
SR144TLZ1NSingle integral shieldral shield3.1756.352.38CERAMIC BALLS
SR144TLZ1WSingle integral shieldral shield3.1756.352.78STEEL BALLS
SR144TLZ1WNSingle integral shieldral shield3.1756.352.78CERAMIC BALLS
SR144K1TLOPEN3.1756.352.38steel balls,separable inner ring
SR144K1TLNOPEN3.1756.352.38ceramic balls,separable inner ring
SR144K1TLWOPEN3.1756.352.78steel balls,separable inner ring
SR144K1TLWNOPEN3.1756.352.78ceramic balls,separable inner ring
SR144K1TLZSingle shield3.1756.352.38steel balls,separable inner ring
SR144K1TLZNSingle shield3.1756.352.38ceramic balls,separable inner ring
SR144K1TLWZSingle shield3.1756.352.78steel balls,separable inner ring
SR144K1TLWZNSingle shield3.1756.352.78ceramic balls,separable inner ring
SR144K1TLZ1Single integral shieldral shield3.1756.352.38steel balls,separable inner ring
SR144K1TLZ1NSingle integral shieldral shield3.1756.352.38ceramic balls,separable inner ring
SR144K1TLWZ1Single integral shieldral shield3.1756.352.78steel balls,separable inner ring
SR144K1TLWZ1NSingle integral shieldral shield3.1756.352.78ceramic balls,separable inner ring
SR144K1TLW02OPEN3.1756.352.38/2.78steel balls,separable inner ring,extended outer ring
SR144K1TLW02NOPEN3.1756.352.38/2.78ceramic balls,separable inner ring,extended outer ring
SR144K1TLZ1W02Single integral shieldral shield3.1756.352.38steel balls,separable inner ring,extended outer ring
SR144K1TLZ1W02NSingle integral shieldral shield3.1756.352.38ceramic balls,separable inner ring,extended outer ring
SR144K2TLOPEN3.1756.352.38steel balls,separable outer ring
SR144K2TLNOPEN3.1756.352.38ceramic balls,separable outer ring
SR144K2TLWOPEN3.1756.352.78steel balls,separable outer ring
SR144K2TLWNOPEN3.1756.352.78ceramic balls,separable outer ring
SR144K2TLZSingle shield3.1756.352.38steel balls,separable outer ring
SR144K2TLZNSingle shield3.1756.352.38ceramic balls,separable outer ring
SR144K2TLWZSingle shield3.1756.352.78steel balls,separable outer ring
SR144K2TLWZNSingle shield3.1756.352.78ceramic balls,separable outer ring
SR144K2TLZ1Single integral shieldral shield3.1756.352.38steel balls,separable outer ring
SR144K2TLZ1NSingle integral shieldral shield3.1756.352.38ceramic balls,separable outer ring
SR144K2TLWZ1Single integral shieldral shield3.1756.352.78steel balls,separable outer ring
SR144K2TLWZ1NSingle integral shieldral shield3.1756.352.78ceramic balls,separable outer ring
SR144K2TLW02OPEN3.1756.352.38/2.78steel balls,separable outer ring,extended outer ring
SR144K2TLW02NOPEN3.1756.352.38/2.78ceramic balls,separable outer ring,extended outer ring
SR144K2TLZ1W02Single integral shieldral shield3.1756.352.38steel balls,separable outer ring,extended outer ring
SR144K2TLZ1W02NSingle integral shieldral shield3.1756.352.38ceramic balls,separable outer ring,extended outer ring
SFR144TLZSingle shield3.1756.352.38STEEL BALLS
SFR144TLZNSingle shield3.1756.352.38CERAMIC BALLS
SFR144TLZWSingle shield3.1756.352.78STEEL BALLS
SFR144TLZWNSingle shield3.1756.352.78CERAMIC BALLS
SFR144TLZ1Single integral shieldral shield3.1756.352.38STEEL BALLS
SFR144TLZ1NSingle integral shieldral shield3.1756.352.38CERAMIC BALLS
SFR144TLZ1WSingle integral shieldral shield3.1756.352.78STEEL BALLS
SFR144TLZ1WNSingle integral shieldral shield3.1756.352.78CERAMIC BALLS
SFR144K1TLZSingle shield3.1756.352.38steel balls,separable inner ring
SFR144K1TLZNSingle shield3.1756.352.38ceramic balls,separable inner ring
SFR144K1TLWZSingle shield3.1756.352.78steel balls,separable inner ring
SFR144K1TLWZNSingle shield3.1756.352.78ceramic balls,separable inner ring
SFR144K1TLZ1Single integral shieldral shield3.1756.352.38steel balls,separable inner ring
SFR144K1TLZ1NSingle integral shieldral shield3.1756.352.38ceramic balls,separable inner ring
SFR144K1TLWZ1Single integral shieldral shield3.1756.352.78steel balls,separable inner ring
SFR144K1TLWZ1NSingle integral shieldral shield3.1756.352.78ceramic balls,separable inner ring
SFR144K2TLZSingle shield3.1756.352.38steel balls,separable outer ring
SFR144K2TLZNSingle shield3.1756.352.38ceramic balls,separable outer ring
SFR144K2TLWZSingle shield3.1756.352.78steel balls,separable outer ring
SFR144K2TLWZNSingle shield3.1756.352.78ceramic balls,separable outer ring
SFR144K2TLZ1Single integral shieldral shield3.1756.352.38steel balls,separable outer ring
SFR144K2TLZ1NSingle integral shieldral shield3.1756.352.38ceramic balls,separable outer ring
SFR144K2TLWZ1Single integral shieldral shield3.1756.352.78steel balls,separable outer ring
SFR144K2TLWZ1NSingle integral shieldral shield3.1756.352.78ceramic balls,separable outer ring