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New product overview and series integration
Kyocera Precision Tools has introduced three upgraded key series : the MB45 Universal Milling Series, MA90 Taper Milling Series, and KGZ Small Cutting/Slotting Series. These enhancements not only expand the range of insert models but also feature comprehensive upgrades to their structural design, coatings, clamping mechanisms, and cooling systems.
MB45:45° Tilt Milling Tool. The inclined angle design reduces impact from cutting forces, requiring less stringent machine tool rigidity. Perfect for small and medium-sized machines for general milling, face milling, shoulder milling, and broaching operations. Enhanced wear resistance and oxidation resistance through PR18 coating combined with MEGACOAT NANO EX technology.
MA90:90° or near 90° (e.g., 88°) milling main rake angle, featuring tangential blade insert design. This configuration connects the inserts to the tool body’s side (rather than the front edge) instead of the tip, enabling better resistance to radial forces and lateral impacts. It enhances chip removal efficiency and improves wall surface quality, offering particular advantages for vertical walls, shoulder milling, and end face milling operations.
KGZ: A system-level solution for small parts, edge-cutting, and groove machining. Featuring a blade width of 1.33 mm with an innovative clamping mechanism (including positioning stop blocks and clamping blocks), it supports both internal and external cooling oil supply/cooling. The PR20 series coating is available for various materials including steel, stainless steel, and cast iron. Specifically optimized for cutting operations, this system ensures stable insert stability and superior edge quality.
These product lines emphasize a “future-oriented” tool portfolio of efficiency, precision, tool life and reduced total piece cost. Instead of focusing on speed or coating as a selling point, Kyocera designs from the perspective of overall production process cost.
Existing pain points and development motivation
Challenges in the processing environment
Machine tool/rigidity limit: many machining centers/automatic lathes/small five-axis or vertical machine tools have insufficient spindle rigidity/stocking runout/ fixture constraints, resulting in vibration or shaking during large feed/deep cut/face machining.
Coating failure and edge crumbling: stainless steel/alkalloy steel/cast iron and other materials in high temperature or frequent cutting, coating (especially edge part) lose heat resistance, oxidation, edge crumbling and even plug failure.
High burr and surface finish requirements: in the small parts/precision parts/medical/military/electronics/mold industry, the burr and roughness of part walls, grooves or cut edges directly affect assembly and function, requiring less trimming and polishing.
Poor cutting and groove processing stability: in small width cutting or groove processing tasks, the problems of broken pieces/inserts/vibrations/short service life are caused by poor clamping or poor insert design.
The total cost is difficult to estimate: buyers often only look at the price tag of the insert or blade body, but ignore the hidden costs such as changing the insert, reworking, trimming, waste, and machine tool idling.
Comparison of core technologies and highlights
Blade and blade structure
Tangential Insert: The MA90 series insert is designed to fix the screw on the side of the blade instead of the end of the blade. This reduces the uneven stress on the leading edge and improves wall quality and insert life.
Multi-edge and low-edge balance: The MB45 provides 8 edges, with some models also having negative edges or weak positive edges, which allow for rapid feed in the case of shallow ap or ae while still maintaining insert durability.
Blade/body/handle/clamping system
The clamping structure of the KGZ series contains a positioning stop and a top clamp to reduce the loosening and displacement of the insert, while ensuring that no gap is created between the side of the insert and the blade due to vibration.
The MA90 and MB45 have been optimized in the blade mesh structure: the web (the middle thickness of the blade) is strengthened, the chip groove geometry is improved, the chip removal capacity is enhanced and the cutting resistance is reduced.
Coating and matrix material
The PR18 series coating + MEGACOAT NANO EX is used for MB45/Ma90, with a heat resistant layer such as alumina or aluminum nitride in the middle to improve the stability of the coating in high temperature cutting.
The KGZ PR20 series inserts further enhance the wear resistance and oxidation resistance of the coating, which is particularly suitable for high speed cutting and groove machining conditions where heat is concentrated.
The insert base material is also used with a more refined/temperature resistant alloy cemented carbide to improve edge collapse resistance and wear resistance.
Cooling/Internal flow channel/Debris discharge geometry
The KGZ has an optional internal cooling option that allows coolant to reach the blade cutting edge and groove directly, effectively reducing heat accumulation in the cutting area.
Although MA90 and MB45 are mainly external or standard cooling, the geometry of their cutting body is improved to improve chip removal efficiency by improving chip groove and blade gap.
Regional lubrication/jet cooling nozzles, when properly arranged with the coating and chip removal geometry, can help significantly reduce peak temperatures and edge wear.
Kyocera MB45 Milling Series
Deep comparison between instances and hypothesis testing paths
Here are a few hypothetical but replicable test cases that I recommend you combine with these cases in your product page or review to support sales and SEO content.
Instance comparison table
Test scenario | Material/Workpiece shape | Use series/models and Settings | Control tool/old model | Key performance indicators and expected improvements |
Scenario 1: Shoulder milling profile / wall | SUS304 stainless steel with 20 mm wall thickness, Ø25 mm surface finish through milling | MA90,90° main rake angle, ae = 20% dia (about 5 mm), ap = 8 mm, fz = 0.06 mm/tooth, Vc = 200 m/min, with coolant/spray cooling | Older end face milling cutters or 4-edged insert tilting milling cutters, no cooling channels, no optimized web | Surface roughness Ra decreased from approximately 1.2 µm to approximately 0.60.7 µm; edge wobble/tinging reduced; tool life increased by approximately 2530%; and chip breakage (chipping) rate decreased |
Scenario 2: Aluminum alloy finishing/shape | AL6061 / Light load thin wall / Ø12 mm tool | MB45 with positive blade insert or light positive blade design, ae = 5-10%, ap = 4 mm, fz = 0.08 mm/tooth, Vc = 600-800 m/min, low coolant/blow assist | The universal aluminum insert milling cutter or positive edge milling cutter is poorly designed | Less chip adhesion; smoother surface; 1520% longer blade lifespan than previous model; fewer burrs; reduced polishing/trimming time |
Scenario 3: Small part cutting/etching | Alloy steel or medium hard steel / cutting width 2 mm / strip / lathe | KGZ series, 2mm wide insert, PR2025 or PR20 coating, internal cooling type handle, moderate groove depth, cutting speed and feed rate adjusted properly | Old KG system or other brand cutting tools | Reduced time to disassemble and assemble inserts; fewer broken pieces; reduced burr height; reduced roughness of cut edges; total cost (including blades + trimming + defects) reduced by approximately 2030% |
Test path suggestions
Preparation stage: select typical workpiece and material; prepare existing tool model and old processing path, record all data (time, surface, burr, defect rate).
New tool trial cut stage: Start trial cut with the above scenario parameters using the new series of Jinggong tools; measure surface roughness, cutting/slot edge burrs, light reflection in highlight/shadow areas, and defect rate
Monitoring wear: Set the edge of the insert/chip state/body deformation of the tool to be checked every few pieces (e.g., every 2030 pieces); at the same time, record the power of the machine tool/handle temperature change/vibration noise.
Parameter tuning: If the initial section is stable, try to fine tune ae or fz to see if it exceeds the load limit of the machine tool or clamping system; focus on monitoring whether the surface and burr begin to deteriorate.
Cost performance and Total Piece Cost (TPC) model
Cost components
Blade / insert price-The price tag of a blade is usually the first concern of the buyer, but it is not the most influential factor.
Number of parts per blade /life-coating, cooling, clamping, and material hardness all affect life. Increased life will reduce costs in mass production.
Machine tool machining time /feed/ cutting parameters–higher ae/ap and appropriate feed rate can shorten the single piece time.
Shuibei / Debearding / Surface treatment / Polishing time and labor cost.
Waste rate/retrofit rate-the cost of defective parts or rework caused by surface burrs, edge breakage, size defects, etc.
Plug/body replacement / handle maintenance / clamping costs-Frequent replacement of plugs or unstable clamping results in additional downtime or operating costs.
Example of simulated cost comparison (batch processing task)
Assume that there are 1,000 stainless steel parts with severe external milling and burr trimming in batch. Comparison between old tool and new model of Kyocera MB45/MA90/KGZ:
project | Old model tool/ universal insert/ old coating | Use Kyocera’s new series |
Unit price of knife/insert | ¥300 | ¥360 |
Number of parts per piece | 200 items | 260 items |
Single tool amortization cost | ¥1.50 | ¥1.38 |
Single machine processing time | 5.0 minutes | 4.6 minutes (feed/cutting parameters slightly better) |
Machine tool cost per minute (assuming ¥10/minute) | ¥50.00 | ¥46.00 |
Shuiban /Dehairing/Manual cleaning costs | ¥5.00 | ¥1.50 |
Waste/rework rate costs | ¥3.00 | ¥1.00 |
Total cost (TPC) | About ¥59.50 | About ¥49.88 |
Every penny saved | — | About ¥9.62 |
If the total is 1,000 pieces, that’s about ¥9,620 saved, and the net gain is still significant after deducting the possible cost of knife inventory and transportation.
User feedback and practical suggestions
User reviews sorted
Wall surface quality improvement: MA90 users reported smooth wall surface, good verticality when milling face/shoulder; few burrs or chamfers on the edge position requiring manual grinding.
Cutting edge cleaning: In the case of small width groove or cutting operation, the cutting edge of KGZ series is sharp and clean, with little clamping and roughing, and the cutting surface is straight.
Long service life: MB45 / KGZ PR18 / PR20 insert has a much longer service life than the old model under medium to heavy load, especially in steel and stainless steel cutting surface finish maintenance for a long time.
Challenges and details of practice
Clamping and handle precision: if the handle or fixture is loose, jumping or the tool body is too long (long handle/overlong extension), the performance of the new series can not be fully played out.
Coolant configuration: improper internal or spray cooling layout can lead to chip accumulation, heat concentration, coating burnout or premature edge wear of the blade.
Plug installation and torque: The clamping structure of the special KZ should be tightened according to the torque recommended by the manufacturer. The positioning stop block/top clamp/clamping surface must be kept clean, and no chips or oil stains are allowed to interfere with the clamping.
Process parameter volume: avoid extreme AE/thick cut/high feed at the beginning, it is necessary to steadily increase the volume; monitor surface quality, cutting sound, temperature and vibration at each step.
