K3XF™
Kerr Endodontics
K3XF™
Kerr Endodontics
Original K3 asymmetric triple-fluted design enhanced with R-Phase heat treatment for improved flexibility and cyclic fatigue resistance
Continuous Rotation · R-Phase™ Heat-Treated NiTi
- RPM
- Ncm3.00
- File
- 24
Specifications
Tap icons for term definitions
| File | Tip | Taper | SpeedRPM | TorqueNcm | Role |
|---|---|---|---|---|---|
Diameter at the file tip (D0). Larger tips shape wider canals. | |||||
How much the file widens per mm. Higher taper = more aggressive cutting. | |||||
Rotational speed (RPM). Follow manufacturer settings to prevent file breakage. | |||||
Rotational force limit (Ncm). Prevents file fracture by auto-reversing when resistance is too high. | |||||
15/.04white | 0.15 | 4% | 350 RPM | 3.00 Ncm | Shaping |
20/.04yellow | 0.20 | 4% | 350 RPM | 3.00 Ncm | Shaping |
25/.04red | 0.25 | 4% | 350 RPM | 3.00 Ncm | Shaping |
30/.04blue | 0.30 | 4% | 350 RPM | 3.00 Ncm | Finishing |
35/.04green | 0.35 | 4% | 350 RPM | 3.00 Ncm | Finishing |
40/.04black | 0.40 | 4% | 350 RPM | 3.00 Ncm | Finishing |
15/.06white | 0.15 | 6% | 350 RPM | 3.00 Ncm | Shaping |
20/.06yellow | 0.20 | 6% | 350 RPM | 3.00 Ncm | Shaping |
25/.06red | 0.25 | 6% | 350 RPM | 3.00 Ncm | Finishing |
30/.06blue | 0.30 | 6% | 350 RPM | 3.00 Ncm | Finishing |
35/.06green | 0.35 | 6% | 350 RPM | 3.00 Ncm | Finishing |
40/.06black | 0.40 | 6% | 350 RPM | 3.00 Ncm | Finishing |
20/.08yellow | 0.20 | 8% | 350 RPM | 3.00 Ncm | Shaping |
25/.08red | 0.25 | 8% | 350 RPM | 3.00 Ncm | Finishing |
30/.08blue | 0.30 | 8% | 350 RPM | 3.00 Ncm | Finishing |
40/.08black | 0.40 | 8% | 350 RPM | 3.00 Ncm | Finishing |
20/.10yellow | 0.20 | 10% | 350 RPM | 3.00 Ncm | Orifice opener |
25/.10red | 0.25 | 10% | 350 RPM | 3.00 Ncm | Orifice opener |
30/.10blue | 0.30 | 10% | 350 RPM | 3.00 Ncm | Orifice opener |
40/.10black | 0.40 | 10% | 350 RPM | 3.00 Ncm | Orifice opener |
20/.12yellow | 0.20 | 12% | 350 RPM | 3.00 Ncm | Orifice opener |
25/.12red | 0.25 | 12% | 350 RPM | 3.00 Ncm | Orifice opener |
30/.12blue | 0.30 | 12% | 350 RPM | 3.00 Ncm | Orifice opener |
40/.12black | 0.40 | 12% | 350 RPM | 3.00 Ncm | Orifice opener |
Matching gutta-percha & paper points
- Gutta-percha
- K3/K3XF Gutta-Percha.04 taper (20-45), .06 taper (20-60), .08 taper, .10 taper
- Paper points
- K3XF Autofit Paper Points.08 taper
Clinical Tips
- Same proven K3 asymmetric triple-fluted design plus R-Phase heat treatment for added flexibility and cyclic fatigue resistance (per product page)
- R-Phase technology — post-machining heat treatment (ground, not twisted) transforms NiTi for improved properties (per Kerr summary)
- Asymmetric cross-section: wide radial land with recessed trailing edge reduces friction, third radial land provides centering (per K3 brochure)
- Variable pitch design reduces screw-in effect and channels debris coronally (per K3 brochure)
- Positive rake angle for active cutting action (per K3 brochure)
- Available in 5 tapers (.04, .06, .08, .10, .12) with tip sizes from 15 to 60 — highly versatile system
- Compatible with Elements Motor preset: 350 RPM / 3.00 Ncm (per Elements Connect IFU; same combined K3/K3XF preset across the Elements motor family)
- Safe-ended (non-cutting) tip follows canal shape while helping to reduce apical transportation
- .10 and .12 taper files available in 17mm length for improved posterior access
Warnings
- Contains nickel — do not use on patients with known nickel allergy
- Inspect files for deformation or wear before each use
- Do not force instruments to working length — use very light pressure
- Irrigate copiously and frequently throughout the procedure
- Clean flutes frequently and at least after each removal from the canal
- Use only in electric motor and handpiece designed for rotary files
Obturation Techniques
Single cone, warm vertical, carrier-based & lateral compaction
Protocol
01Glide Path1
02Shaping2
03Finishing1
Related Systems
From Kerr Dental Systems
Manufacturer page
Kerr Dental SystemsOther continuous rotation systems
Motion category
Continuous RotationCollections
Clinical guides
Frequently Asked Questions
What alloy is K3XF made from?
What alloy is K3XF made from?
Answer
K3XF™ is manufactured from R-Phase™ Heat-Treated NiTi.
How many files are in the K3XF sequence?
How many files are in the K3XF sequence?
Answer
The K3XF™ system includes 24 files: 15/.04, 20/.04, 25/.04, 30/.04, 35/.04, 40/.04, 15/.06, 20/.06, 25/.06, 30/.06, 35/.06, 40/.06, 20/.08, 25/.08, 30/.08, 40/.08, 20/.10, 25/.10, 30/.10, 40/.10, 20/.12, 25/.12, 30/.12, 40/.12.
What is the K3XF file sequence?
What is the K3XF file sequence?
Answer
K3XF is a taper matrix rather than a fixed sequence: the DFU describes a crown-down approach in which larger tapers (.08 to .12) open the coronal portion and smaller tapers (.04, .06) take the apical work, moving to the next file when the current one stops advancing.
- The final apical size is chosen from the canal anatomy.
- The protocol section above lists speed, torque and the available tapers.
What motion type does K3XF use?
What motion type does K3XF use?
Answer
K3XF™ uses continuous rotation motion.
What cases is K3XF best for?
What cases is K3XF best for?
Answer
K3XF™ is best suited for: versatile multi-taper rotary shaping, clinicians familiar with K3 technique, cases requiring wide taper selection (.04-.12).
What speed and torque settings are recommended for K3XF?
What speed and torque settings are recommended for K3XF?
Answer
Recommended settings: 350 RPM and 3.00 Ncm across the file sequence (refer to official DFU for full per-file parameters).
Reviewed by
Uzm. Dt. Levent Yüksel
DDS · Endodontist
Endodontist — DDS, Hacettepe University; endodontics specialty training, Ankara University. 10+ years of clinical experience. Sole author and reviewer of EndoGuide content.
Cite this page
Citation formats for the manufacturer-verified specification data on this page.
AMA
Yüksel L. K3XF: sequence, speed and torque settings. EndoGuide. Updated: 2026-10-03. https://endo-guide.app/system/k3xf
BibTeX
@misc{endoguide-k3xf,
author = {Yüksel, Levent},
title = {K3XF: sequence, speed and torque settings},
howpublished = {\url{https://endo-guide.app/system/k3xf}},
year = {2026},
note = {EndoGuide. Updated: 2026-10-03}
}Powered by:Uzm. Dt. Levent Yüksel
@endoguideappIndependent educational resource. Product names and trademarks belong to their respective manufacturers, who neither sponsor nor endorse EndoGuide.