KaVo Handpiece Bearing Cross-Reference Guide
Check your handpiece model below to find the correct bearing kit. All dimensions in mm (ID x OD x W).
| KaVo Model (Series) | Handpiece Type | Bearing Size (mm) | Ball Material | Our Part # |
|---|---|---|---|---|
| 630 B / C (Super Torque) | High Speed | 3.175 x 6.35 x 2.78 | Ceramic / Steel | SR144TLK |
| 640 B / C (Super Torque) | High Speed | 3.175 x 6.35 x 2.78 | Ceramic | SR144TLK-C |
| 650 B (Super Torque) | High Speed | 3.175 x 6.35 x 2.38 | Ceramic | SR144TLZ |
| 8000 (Gentle Silence) | High Speed | 3.175 x 6.35 x 2.78 | Ceramic | SR144TLK |
| M9000L (Smart Torque) | High Speed | 3.175 x 6.35 x 2.38 | Ceramic | SR144TLZ |
| Intramatic 181H | Low Speed | 4.00 x 7.00 x 2.00 | Steel | MR74ZZ |
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Why Choose Our KaVo Replacement Bearings?
Regarding service life:
“Our bearings for KaVo turbines feature a specific Torlon (Polyamide-imide) cage design that withstands repeated autoclave sterilization cycles up to 135°C. Unlike generic bearings, our optimized cage retention force ensures stability at high speeds, preventing cage failure inside the turbine canister.”
Decibels, Vibration:
“Noise reduction is critical for dental practitioners. We use Grade 3 Silicon Nitride (Si3N4) ceramic balls which are 60% lighter than steel. This reduces centrifugal force and vibration, keeping the operation noise below 60 decibels, matching the original KaVo ‘Gentle Silence’ experience.”
Our Products
Not sure which bearing fits your KaVo handpiece?
Don’t guess. Send us a photo of your turbine or the old bearing. Our technicians will identify the correct ISO part number for you within 1 hour.
FAQ for KaVo
How do your replacement bearings compare to original KaVo spare parts?
Our aftermarket bearings are engineered to meet or exceed the OEM specifications of KaVo turbines. We use Grade 3 Silicon Nitride (Si3N4) ceramic balls and Torlon cages, which are the same high-standard materials used in original German manufacturing. The main difference is the price—our direct-from-factory pricing allows you to save up to 50-70% on maintenance costs without sacrificing performance or lifespan.
Are these bearings compatible with older KaVo handpieces like the 630B or 640C?
Yes. We specialize in legacy and current KaVo models. Our catalog includes compatible bearings for the classic Super Torque (630B/C, 640B/C), Gentle Silence (8000 series), Smart Torque (M9000L), and the newer MASTERtorque series. Please refer to our Cross-Reference Table above to match the exact dimensions (e.g., 3.175mm x 6.35mm x 2.78mm) for your specific turbine canister.
Should I choose ceramic or steel bearings for my KaVo high-speed turbine?
For KaVo high-speed turbines (350,000+ RPM), we highly recommend Ceramic Bearings. Ceramic balls are 60% lighter than steel, generating less centrifugal force and heat inside the turbine head. This is critical for KaVo’s integrated spindle design, as it reduces wear on the chuck and extends the bearing life by 2-3 times compared to stainless steel alternatives.
My KaVo Gentle Silence turbine is making noise. Will changing the bearings fix it?
In 90% of cases, excessive noise or vibration is caused by worn bearing races or cages. Installing our ABEC-7 precision bearings will restore the smooth, quiet operation characteristic of the “Gentle Silence” series. However, please also check your O-rings and wavy washers, as worn washers can also cause axial play and vibration. We supply full repair kits including O-rings upon request.
Do you offer bulk discounts for dental repair shops purchasing KaVo parts?
Yes. We are a manufacturer specializing in B2B supply. If you are a dental handpiece repair shop or a parts distributor, we offer tiered wholesale pricing for orders of 50+ or 100+ pieces. We also provide OEM packaging services if you want to sell under your own brand. Contact our sales team via WhatsApp for a custom quote.