High Speed SR144TiZN 3.175×6.35...
SR144TiZN High Speed Dental Handpiece Bearing – Hybrid Ceramic, ABEC-7/P4 Precision. Stainless steel rings (440C) with Silicon Nitride (Si3N4) ceramic balls. Torlon/Phenolic cage for heat resistance, speeds up to 450,000 RPM. Precision replacement for KaVo, NSK, W&H, Sirona, Midwest, Bien-Air and major dental handpiece brands. Delivers smoother operation, longer turbine life, and quieter performance.
Key Specifications:
Model: SR144TiZN
Type: Miniature deep groove ball bearing (hybrid ceramic)
Inner Diameter (ID / d): 3.175 mm (1/8 inch)
Outer Diameter (OD / D): 6.35 mm (1/4 inch)
Width (B): 2.38 mm (3/32 inch) or 2.78 mm (7/64 inch) [variant-dependent]
Ring Material: AISI 440C stainless steel
Ball Material: Silicon Nitride (Si3N4) ceramic
Precision Grade: ABEC-7 / ISO P4
Maximum Rotational Speed: 350,000 – 500,000 RPM
Weight: Approx. 0.2–0.4 grams
RPM: 400,000
Ceramic balls are standard in our high-end series for their lightweight properties, which reduce centrifugal force, lower heat generation, and enable higher maximum speeds.
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High-Speed 400 000 rpm Low-Noise Sta...
Our premium dental handpiece bearings are engineered to meet the extreme demands of modern dentistry. Designed for high-speed operation, exceptional quietness, and extended service life.
Key Specifications:
Model: SR144
Dimensions: 3.175x6.35x2.38 mm
Balls: Silicon Nitride (Si3N4) Ceramic
Races: 440C Stainless Steel (hardened to 58-60 HRC)
Tolerance: ABEC-7 (ISO P2 equivalent)
Seals: Dual Rubber Shields (RS) or Metal Seals
RPM: 400,000
Ceramic balls are standard in our high-end series for their lightweight properties, which reduce centrifugal force, lower heat generation, and enable higher maximum speeds.
Read more