KB by Kubey Aero Air Knife Purple Titanium, Satin M390 (KB488C)
- Aero Air Purple Titanium, Satin a compact EDC folding knife featuring an intuitive Crossbar lock and uncompromising use of premium materials. M390 powder steel blade, contoured titanium handle. Opens with a thumb studs in the blade.
0,00 €KB by Kubey Aero Air Purple Titanium Folding Knife, Satin M390 (KB488C)
The KB Aero Air KB488C is a lightweight titanium folding knife designed by KB Knives, combining a Böhler M390 steel blade with a purple anodized handle featuring Diagonal Milling. The design features a Crossbar Lock and ceramic ball bearings, making it compact, modern, and comfortable for everyday use.
The 74.00 mm blade features a Drop Point profile, a flat grind, and a satin finish. It opens manually using thumb studs on both sides, and once fully extended, the blade is secured by the Crossbar Lock.
Böhler M390 and Vacuum-Cryogenic Heat Treatment
The blade is made of Böhler M390 steel, hardened to 60–62 HRC. Vacuum hardening combined with cryogenic treatment was used, which promotes high hardness, wear resistance, and stable steel properties during regular use.
Drop Point, flat grind, and Satin
The Drop Point profile provides a versatile geometry with a well-controlled tip and a functional cutting edge. The flat grind ensures smooth blade glide through the material, while the satin finish gives the blade a neat, subdued appearance.
Purple Titanium, Diagonal Milling, and Crossbar Lock
The handle is made of titanium and anodized purple. Its surface is complemented by the distinctive Diagonal Milling, which emphasizes the model’s technical character and adds texture to the grip surface.
The titanium backspacer, clip, pivot cap, and screws all feature a consistent purple anodized finish. Ceramic ball bearings ensure smooth blade operation, while the Crossbar Lock stabilizes the blade when open. The clip can be mounted on the right or left side in a tip-up configuration.
Key Features at a Glance
- Böhler M390 — steel with a hardness of 60–62 HRC.
- Vacuum-cryogenic treatment — enhances the steel’s high hardness, wear resistance, and stability.
- Drop Point — a versatile utility profile.
- Flat Grind — efficient cutting geometry.
- Satin — satin finish on the blade.
- Purple Anodized Titanium — purple anodized handle.
- Diagonal Milling — diagonal milling on the handle surface.
- Crossbar Lock — lock with a crossbar locking element.
- Ceramic ball bearings — smooth operation of the mechanism.
- Thumb studs on both sides — manual opening.
- 74.00 g — low weight ideal for everyday carry.
Technical Data
| Product Number | KB488C |
| Product Name | KB by Kubey Aero Air Purple Titanium, Satin M390 |
| Overall length | 170.00 mm / 6.69" |
| Blade length | 74.00 mm / 2.91“ |
| Blade Thickness | 3.10 mm / 0.12” |
| Handle Length | 96.00 mm / 3.78“ |
| Handle thickness | 11.00 mm / 0.43” |
| Weight | 74.00 g / 2.61 oz |
| Blade material | Böhler M390 |
| Blade hardness (HRC) | 60–62 HRC |
| Blade grind | Flat |
| Blade finish | Satin |
| Handle material | Titanium |
| Handle finish color | Purple Anodized, Diagonal Milling |
| Backspacer material | Titanium |
| Backspacer Color | Purple Anodized |
| Clip | Right/Left, tip-up |
| Clip material | Titanium |
| Pivot | Caged Ceramic Ball Bearing |
| Lock | Crossbar Lock |
| Opening Mechanism | Manual, Thumb Studs |
| Additional Accessories | None |
| Designer | KB Knives |
| Brand | KB |
| Manufacturer | Kubey Knife |
| Country of Origin | P.R.C. |
Frequently Asked Questions
How do I care for Böhler M390 steel?
It’s a good idea to clean the blade regularly and dry it thoroughly. M390 is highly corrosion-resistant, but proper care helps maintain its sharpness and surface appearance for longer.
How do I sharpen the KB Aero Air?
High-performance abrasives, especially diamond ones, work well with M390 steel. It’s best to guide the sharpener evenly and maintain the factory edge geometry.
What sharpening angle should be used for the KB Aero Air?
The recommended sharpening angle range is 15°–20°. This allows you to adjust the edge geometry to your preferred balance between cutting aggressiveness and blade durability.
How does the Crossbar Lock work?
The Crossbar Lock uses a transverse locking bar that stabilizes the blade once it’s open. Releasing the lock allows the knife to be folded.
How do you maintain ceramic ball bearings?
It’s a good idea to regularly clean the area around the pivot of dust and small debris. If necessary, you can use a small amount of a cleaner designed for knife mechanisms.
Prepared by: Specialists at Sharg® company – Your expert in EDC and cutting tools
