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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R188 ZZ 1/4″ x 1/2″ x 3/16″ Chrome S...
R188ZZ Miniature Bearing – Precision-machined for high-speed, low-noise operation. Double metal shields retain lubrication and block contaminants. ABEC 1 precision, 40,000 RPM grease speed. Ideal for skateboards, inline skates, RC models, yo-yos, 3D printers, and hobby robotics.
Model: R188ZZ
Type: Deep groove ball bearing (inch series)
Inner Diameter (d): 6.35 mm (1/4 in)
Outer Diameter (D): 12.70 mm (1/2 in)
Width (B): 4.762 mm (3/16 in)
Mass: Approx. 2.24 g
Material: Chrome steel (GCr15)
Shielding: Double metal shields (ZZ)
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