SR144TLZ / SR144TLZN — Double-Shielded Dental High-Speed Turbine Bearing
Precision at 420,000 RPM — Built for the Handpiece, Engineered for the Patient
The dental turbine bearing is the beating heart of every high-speed handpiece. When a handpiece spins at over 400,000 revolutions per minute, there is no margin for error — every micron of precision, every fraction of a decibel of noise, and every minute of operational life matters. Our SR144TLZZ and SR144TLZN P4 double-shielded dental bearings are purpose-built to deliver uncompromising performance under the most demanding clinical conditions.
Key Specifications
|
Parameter
|
SR144TLZ
|
SR144TLZN
|
|
Model
|
SR144TLZ
|
SR144TLZN
|
|
Dimensions
|
3.175 × 6.35 × 2.38 mm
|
3.175 × 6.35 × 2.38 mm
|
|
Precision Grade
|
P4 / ABEC7
|
P4 / ABEC7
|
|
Ring Material
|
AISI 440C Stainless Steel
|
AISI 440C Stainless Steel
|
|
Ball Material
|
440C Steel Ball (Si₃N₄ Ceramic optional)
|
Si₃N₄ Ceramic Ball
|
|
Cage Material
|
Torlon
|
PAI
|
|
Max Speed
|
420,000 RPM
|
420,000 RPM
|
|
Seal Type
|
Double Shield (ZZ)
|
Double Shield (ZZ)
|
|
Lubrication
|
Grease-lubricated
|
Grease-lubricated
|
|
Noise Level
|
≤ 30 dB
|
≤ 30 dB
|
|
Autoclavable
|
Yes
|
Yes
|
|
Compatible Brands
|
Most high-speed handpiece brands
|
Most high-speed handpiece brands
|
|
Certification
|
ISO 9001
|
ISO 9001
|
Why Choose Our Double-Shielded Dental Bearings?
1. Precision You Can Trust — P4 / ABEC7
Manufactured to P4 tolerance (equivalent to ABEC7), our bearings deliver exceptionally low runout and vibration. This means smoother handpiece operation, reduced patient discomfort, and more precise cavity preparation — every single time.
2. 440C Stainless Steel — Corrosion Resistance Meets Hardness
440C is the material of choice for dental bearings, offering an optimal balance of:
High hardness
● (58–62 HRC after heat treatment) for extended wear life
Excellent corrosion resistance
● against saliva, blood, and repeated autoclave sterilization
Dimensional stability
● at elevated temperatures during sterilization cycles
3. Double Shield Design — Sealed for Reliability
The double-sided shield (ZZ) configuration provides dual-layer protection:
● Prevents ingress of dental debris, blood, and contaminants during procedures
● Retains high-performance grease lubricant for consistent high-speed operation
● Extends service intervals and overall bearing lifespan
4. 420,000 RPM — High-Speed Performance
Tested and rated for continuous operation at up to 420,000 RPM, our bearings meet the demands of modern pneumatic high-speed handpieces. Whether for routine cavity preparation or precision crown work, consistent torque and minimal speed drop-off are guaranteed.
5. Whisper-Quiet Operation — ≤ 30 dB
With noise emissions kept at or below 30 decibels, our bearings help maintain a calm clinical environment — reducing patient anxiety and operator fatigue during long procedures.
6. Universal Compatibility — Across Major Global Brands
Designed as a direct-fit universal interchange bearing for mainstream high-speed handpiece systems worldwide:
|
Region
|
Brands
|
|
Europe
|
KAVO, W&H Synea, Sirona T1/T3
|
|
Japan
|
NSK Pana-Max, Shofu, Morita
|
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