Aftermarket replacement part. Independently manufactured — not supplied by or affiliated with the handpiece manufacturer.
Replacement dental handpiece bearings for Pana Air, Ti-Max X and Ti-Max Z turbine heads. This page covers dental handpiece bearings only — not industrial deep-groove bearings.
- Fitment scope — front and rear turbine bearings, rotor cartridges and back covers across Pana Air, Ti-Max X and Ti-Max Z heads, in standard, mini and torque sizes.
- Ceramic or steel balls — silicon nitride (Si3N4) or 440C stainless in an identical envelope.
- ISO P4 / ABEC-7 precision class — rated for 400,000+ RPM service.
- Wholesale and repair-shop friendly — tray quantities, stable tolerances batch to batch, internal part numbers you can quote against.
Head size is the whole game in this range. A miniature head, a standard head and a torque head sit in the same product family and take different bearings. Check the table, then check your stamp.
Cross-reference: bearings for NSK dental turbine handpieces
All dimensions in millimetres (ID × OD × Width). Aftermarket replacement parts — independently manufactured.
| Handpiece Model | Head Type | Bearing Position | Bearing Size — ID × OD × W (mm) | Confirm your width |
|---|---|---|---|---|
| Pana Air (PA-SU) | Standard Head | Front (chuck side) | 3.175 × 6.35 × 2.38 or 2.78 mm (confirm suffix) | Free photo ID — 1 hr |
| Pana Air (PA-SU) | Standard Head | Rear (cap side) | 3.175 × 6.35 × 2.38 or 2.78 mm (confirm suffix) | Free photo ID — 1 hr |
| Ti-Max X600L | Standard Head | Front (chuck side) | 3.175 × 6.35 × 2.38 or 2.78 mm (confirm suffix) | Free photo ID — 1 hr |
| Ti-Max X600L | Standard Head | Rear (cap side) | 3.175 × 6.35 × 2.38 or 2.78 mm (confirm suffix) | Free photo ID — 1 hr |
| Ti-Max X500L | Mini Head | Front (chuck side) | 3.175 × 6.35 × 2.38 or 2.78 mm (confirm suffix) | Free photo ID — 1 hr |
| Ti-Max X700L | Torque Head | Front (chuck side) | 3.175 × 6.35 × 2.38 or 2.78 mm (confirm suffix) | Free photo ID — 1 hr |
| Ti-Max Z900L | Standard Head | Front (chuck side) | 3.175 × 6.35 × 2.38 or 2.78 mm (confirm suffix) | Free photo ID — 1 hr |
| Ti-Max Z900L | Standard Head | Rear (cap side) | 3.175 × 6.35 × 2.38 or 2.78 mm (confirm suffix) | Free photo ID — 1 hr |
| Ti-Max Z800L | Mini Head | Front (chuck side) | 3.175 × 6.35 × 2.38 or 2.78 mm (confirm suffix) | Free photo ID — 1 hr |
Front and rear bearings differ on many models. Confirm both before ordering.
If your head is not on this list, look up bearings by handpiece model instead — or send a photo and we will identify it from the stamp.
Why NSK dental bearings fail — and what wears first
These are fast heads. Several models in the Ti-Max range spin in the 380,000–450,000 RPM band, and speed magnifies every small defect. The chuck-side bearing sees the highest combined load and is the usual first casualty.
The characteristic early symptom in this family is noise, not vibration. Owners describe a rise in pitch — a turbine that used to hiss now sings. That is the ball set beginning to skid on spin-up because the oil film no longer survives the sterilization cycle.
Water intrusion is the second driver. Multi-port spray systems put a lot of coolant near the head, and any anti-suckback feature that has degraded will pull contaminated aerosol back toward the bearing on rundown. Once fluid reaches the raceway, corrosion pitting starts and cannot be reversed by lubrication.
Third is cage fatigue. Repeated 134 °C cycling embrittles the retainer until it fractures, and a broken cage destroys the head in seconds rather than weeks.
Practical rule: replace both positions together, and inspect the chuck at the same time. A worn chuck loads the front bearing off-axis and will eat the new part too. If you are still at the symptom stage, diagnose turbine noise before you order.
Which NSK models we cover
Pana Air
The long-running fixed-connection standard-head turbine, and still one of the most rebuilt handpieces in general practice worldwide. Bearings, rotor cartridges and back covers are all consumables here. Units in this family have often been serviced multiple times, so verify the head has not already been fitted with a non-standard bearing set.
Ti-Max X600L (standard head)
The Ø11.2 × 13.6 mm standard head, roughly 21 W, running to about 440,000 RPM. This is the reference point for the X range: if you can identify a head as X600-pattern, the bearing set is consistent. Front and rear differ. Titanium bodies make heat damage harder to spot visually, so trust the sound.
Ti-Max X500L (miniature head)
At Ø10.3 × 11.7 mm this is a true miniature head running short-shank burs only, and it uses a narrower bearing than its standard-head sibling. Fitting a standard-head part here is the classic mis-order in the X range — it enters the bore and then binds. Confirm the head stamp first.
Ti-Max X700L (torque head)
The Ø13.2 × 13.6 mm torque head trades speed for cutting force, running roughly 300,000–360,000 RPM. Lower speed does not mean lower bearing stress: sustained high torque loads the chuck-side race harder during long preparations. Expect a different bearing set from both the standard and miniature heads.
Ti-Max Z900L and Z800L
The Z range splits into a Ø12.5 mm standard head (Z900L) and a Ø10.8 mm mini head (Z800L), with interchangeable cartridges as a design feature. That interchangeability is exactly why bearings get mixed up between the two. Order by head diameter, not by series name.
We also stock more than loose bearings
For this range we hold rotor cartridges XN-01 (NPA-S03), XN-16, XN-18, XN-20 and XN-21, the back cover HENSKEI, the repair tool HnM-S00L, and low-speed part ZW-NS. Nine re-orderable line items. Because both positions should be changed together, most benches order front-and-rear bearing sets rather than singles. Every code above is our own internal designation — we do not publish bare industrial-style bearing numbers against dental fitments, because that is precisely how the wrong part ends up in a turbine head.
A note on ceramic ball options
Silicon nitride balls are roughly 60% lighter than steel, which cuts centrifugal load on the outer race at full speed and keeps the head cooler and quieter. In a range that regularly exceeds 400,000 RPM, that mass reduction is the single biggest lever available. Ceramic does not change the envelope, so fitment is unaffected. The full material comparison sits on our ceramic dental bearings page.
Sterilization, cage material and service life
Most bearings in this family die in the autoclave, not the mouth. The 134 °C cycle purges the lubricant film, thermally cycles the cage, and leaves residual moisture inside the head if the unit is not dried and lubricated correctly afterwards.
Our high-speed bearings run a Torlon (polyimide) cage for dimensional stability across repeat cycles, with 440C-grade stainless rings and 134 °C autoclave compatibility.
Protocol that actually extends life: purge and lubricate before sterilization, run the handpiece for a few seconds to distribute the film, and never store a head wet. Thermodisinfector cycles count as sterilization events for this purpose.
Bench service life is 1,000 hours+ under continuous testing at 2.5 kg air pressure, and 500 hours+ in dry, no-oil testing. Manufacturing is to ISO P4 / ABEC-7, tested to GB/T 30701-2005, under an ISO 9001 quality system. We publish no lifespan multiplier for ceramic against steel, because we have not measured one under controlled conditions.
Not sure which bearing fits? Don’t guess. Send us a photo of your turbine or your old bearing — our technicians identify the correct size and part number within 1 business hour.
Include the head-size stamp if visible — width varies by head.
Or go straight to our free bearing identification service — one clear photo of the old bearing is usually enough.
FAQ
Are these dental bearings or industrial bearings?
Dental only. Every part on this page is a high-speed dental handpiece bearing intended for turbine heads. We do not supply industrial deep-groove bearings, and we do not cross-list dental parts against industrial catalogue numbers.
Do Pana Air and Ti-Max use the same bearing?
Do not assume so. They are different head architectures, and within the Ti-Max range alone there are miniature, standard and torque heads with different seats. Identify by head diameter and stamp, not by family name.
Can I replace just the noisy bearing?
You can, but it rarely lasts. The surviving bearing is already part-worn and will load the new one unevenly. Replace front and rear as a set, and check the chuck for retention loss while the head is open.
Will ceramic bearings fit an older Pana Air head?
Yes. Ceramic is a ball-material option within the same external envelope, so it fits any head that accepts the steel equivalent. Older heads often benefit most, because reduced ball mass compensates for a slightly worn seat.
Do you sell rotor cartridges for these handpieces?
Yes — XN-01 (NPA-S03), XN-16, XN-18, XN-20 and XN-21, plus the HENSKEI back cover and the HnM-S00L repair tool. Shops typically stock cartridges for same-day turnaround and loose bearings for margin on scheduled rebuilds.
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Related pages
- dental turbine bearings — the full high-speed category
- bearing cross-reference lookup — search by handpiece or part number
- SR144 bearing specifications — the two-width problem explained
- ceramic dental bearings — Si3N4 versus steel, in detail
All brand names are trademarks of their respective owners, used solely to identify compatible applications. Products are independently manufactured and not OEM parts.
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