3.175*6.35*2.78 mm Sr144zz P4 Grade Stainless Steel 50000 Rpm Medical Handpiece Air Turbine Dental Bearing

3.175*6.35*2.78 mm SR144ZZ P4 grade stainless steel 50000 RPM medical handpiece air turbine dental bearing This type bearing special bearings for Dental dentist handpiece, the inner and outer rings is AISI440 stainless steel (9Cr18Mo) material the ball refined stainless steel (AISI440C) or a non-metallic super-hard ceramic material (SI3N4), has good wear resistance cagethe imported the TORLON or high-strength low-friction and self-lubricating properties of polyimide material or 80 to 120 phenolic Textolite material, bearing 200 ~ 250Kpa air pressure, the speed of up to 300 000 to 400 000 rpm. Under normal conditions of use, bearing the working life of more than 6 months. The high-speed dentists dedicated phone bearing manufacturing precision meets the P4 level national standards GB/T307.1-2005 requirements can be applied to different models at home and abroad dentists phone high-speed grinder.   more models :SFR144TLZ , SFR144TLZN , SFR144TLZW , SFR144TLZWN , SFR144TLZ1 , SFR144TLZ1N , SFR144TLZ1W , SFR144TLZ1WN ,SFR144K1TLZ , SFR144K1TLWZ , SFR144K1TLWZN , SFR144K1TLWZ1N , SFR144K2TLZ1 , SFR144K2TLZ1N , SFR144K2TLWZ1N , SR144TLZNW ,SR144TLZW , SR144TLWN , SR144TLKZN etc.  Product's name 3.175*6.35*2.78 mm SR144ZZ P4 grade stainless steel 50000 RPM medical handpiece air turbine dental bearing  Model SR144ZZ Size 3.175*6.35*2.78 mm Cage material TorLon(black) Ball material Si3N4 ceramic  Rotating speed 350000rpm-400000rpm Stock  Large SR144TLZWN for W&H (W&H handpiece TE-98 PB use) ,BIEN AIR PRESTIGE PB 1Material                                 (Balls and Rings)Flanged outer ring featuresBasic Bearing codeAngular contact bearing TypeMaterial(Cage)Appearance featureMaterial (Closure)WidthMaterial (balls)Balls NumberBearings of Dental Speed Handpiece Nnmbering System12345678910SFR144K1K2TLTiTLKGZZ1WW02N(8)                                            No:10(8)-8 balls are taken;                      Absence of symbol -7 balls are taken.                                      No:9N-Ball material is Si4N3;                       Absence of symbol - Ball material is 9Cr18Mo(AISI440C).                                 No:8W-Width of both inner and outer ring are 2.78mm;                               W02-Width of outer ring is 2.38mm and width of inner ring is 2.78mm(see figure 16);                                  Absence of symbol - Both inner and outer ring are 2.38mm.                              No:7Absence of symbol -Open Bearing.                           Z-Bearing is with single shield(see figure 2);                 Z1-Bearing outer and shield are integral (see figure 3).                         No:6K-Outer rings with stage(see figure 11);                           G-Outer rings with recess(see figure 21).                      No:5TL-Polyimide(Black);                                                               Ti-Textolite.                                                                             TA-Textolite.Polyimide (yellow);                  No:4Absence of a symbol - Deep groove bearing.                                                   K1-Angular contact bearing with  stepped inner ring (see figure 4);                    K2-Angular contact bearing with counterbored outer ring (see figure 5).          No:3Basic bearing code(inch).         No:21)When width of outer ring is 2.38mm ,the width of capped edge is 0.6mm(see figure 6);            2) When width of outer ring is 2.78mm, the width of capped edge 0.8mm(see figure 6);              3)When outer ring is with recess ,the width of capped edge is 0.45mm(see figure21).       No:1S -Rings and balls are made in 9Cr18Mo Stainless Stell (AISI440C).     NOPART NUMBERDIMENSIONSPECIFICATIONOUT RING     COVERSTEEL BALLCERAMIC BALL1SR144TL¢6.35×¢3.175×2.38  √ 2SR144TLN¢6.35×¢3.175×2.38   √3SR144TLZ¢6.35×¢3.175×2.38 √√ 4SR144TLZN¢6.35×¢3.175×2.38 √ √5SR144TLK¢6.35×¢5.98×¢3.175×2.38SIDE STEP √ 6SR144TLKN¢6.35×¢5.98×¢3.175×2.38SIDE STEP  √7SR144TLKZ¢6.35×¢5.98×¢3.175×2.38SIDE STEP√√ 8SR144TLKZN¢6.35×¢5.98×¢3.175×2.38SIDE STEP√ √9SR144TLW¢6.35×¢3.175×2.78  √ 10SR144TLWN¢6.35×¢3.175×2.78   √11SR144TLZW¢6.35×¢3.175×2.78 √√ 12SR144TLZNW¢6.35×¢3.175×2.78 √ √13SR144TLKW¢6.35×¢5.98×¢3.175×2.78SIDE STEP √ 14SR144TLKNW¢6.35×¢5.98×¢3.175×2.78SIDE STEP  √15SR144TLKZW¢6.35×¢5.98×¢3.175×2.78SIDE STEP√√ 16SR144TLKZNW¢6.35×¢5.98×¢3.175×2.78SIDE STEP√ √17SFR144TLZN¢6.35×¢7.518×¢3.175×2.38FLANGE√ √18SFR144TLZ¢6.35×¢7.518×¢3.175×2.38FLANGE√√ 19SFR144TLZW¢6.35×¢7.518×¢3.175×2.78FLANGE√√ 20SFR144TLZWN¢6.35×¢7.518×¢3.175×2.78FLANGE√ √21R2-5ZZ¢7.938×¢3.175×3.571 √ √Remark S-STEEL RING   TL-CAGE MATERIAL   Z--SIGE COVER   N-CERAMIC BALL                         SR144-STANDARD         K-SIDE STEP     F-FLANGE  Company information:Changsha Terry Machinery Co.Ltd is a professional supplier of bearings and transmission products.We are BV verified supplier and 10 year golden supplier on alibaba. We are engaged in bearing and transmission products exceeds 14 years now, our major products ar