M4 20°black Tin coating AAA 90×90×32 Gear Hob
The M4 20° Black TiN Coating AAA 90×90×32 Gear Hob is a high-precision tool designed for efficient cutting of spur and helical gears. Made from HSS M35, it provides excellent strength, smooth performance, and a long working life. The black TiN coating helps reduce wear and improve cutting quality. Ideal for automotive, aerospace, and industrial gear manufacturing, this AAA-grade hob ensures accurate tooth profiles and clean finishes, even in demanding, high-speed production environments.
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M4 20°black Tin coating AAA 90×90×32 Gear Hob — super high Precision Tool for High-Efficiency Gear Cutting
The Module 4 pressure angle M4 20°black Tin coating AAA 90×90×32 gear hob is a super high-precision cutting tool engineered for professional gear manufacturing. Designed for spur and helical gears, it delivers outstanding surface finish and dimensional accuracy even in high-speed, continuous production environments.
Manufactured from premium HSS-M35 material and coated with advanced wear-resistant surface treatment, this hob ensures long tool life, excellent chip evacuation, and stable performance under heavy-duty cutting conditions.
Applications of M4 20°black Tin coating AAA 90×90×32 Gear Hob:
Perfect for Gear machining for aircraft engines and helicopter transmission systems in aerospace; spindle boxes and feed systems for high-precision machine tools. Wind turbine gearboxes for energy equipment; gearboxes for high-end racing cars and luxury vehicles. Reducers and transmission systems for precision instruments and robots.
Technical Specifications:
| Parameter | Specification | Description / Notes |
| Product Name | Black Tin coating Module 4 pressure angle 20° AAA 90×90×32 Gear Hob Cutting Tool | Standard single or multi-start gear hob |
| Module (m) | 4 | Defines gear tooth size; for large module gears |
| Material | HSS M35 HSS-E (W6Mo5Cr4V2Co5)/SKH55/DIN1.3243/HS2-9-1-8 | High-Speed Steel for excellent hardness & wear resistance |
| Pressure Angle (PA) | 20° | Standard involute gear pressure angle for smooth gear meshing |
| Accuracy Grade | Class AAA /ISO11054/DIN3968/ANSI/AGMA/JISB4356 | Ensures precise tooth form and dimensional accuracy |
| Finish / Coating | Black Oxide | Protects against corrosion, reduces friction & glare |
| Outer Diameter (OD) | 90 | Depends on module and cutting design |
| Overall Length (L) | 90 | Size suitable for module 12 hobs |
| Bore Diameter | 32 | Fits standard hob arbors |
| Number of Starts | Single / Multi-start (as specified) | Multi-starts allow faster cutting; single for precision |
| Type of Gear Cut | Spur / Helical Gear | Customizable per order |
| Direction of Cut | Right-hand (standard) / Left-hand (optional) | Based on machine spindle orientation |
| Profile Standard | DIN 3972 / ISO 53 | Standard involute profile with 20° pressure angle |
| Application | Gear Hobbing Machines | For cutting steel, cast iron, or alloy gears |
| Hardness (after heat treatment) | 64–66 HRC | Ensures long tool life and cutting edge stability |
| Surface Treatment | Steam Oxidized / Blackened | Improves chip evacuation and oxidation resistance |
| Coating Options (optional) | TiN, TiAlN, AlCrN | For extended tool life and high-speed applications |
| Country of Manufacture | China | Common production origins |
| Typical Industries | Automotive, Industrial Machinery, Gearbox Manufacturing, Aerospace | Used where precision gears are required |
Key Features:
- Made from HSS M35 for toughness and wear resistance.
- 20° pressure angle — the most common standard for gear systems.
- Black oxide coating for corrosion protection and improved tool life.
- Class AAA accuracy ensures super precise, smooth, and quiet gear operation.
- Available in right-hand or left-hand cutting directions.
- Compatible with manual, semi-automatic, and CNC gear hobbing machines.
- Suitable for roughing, finishing, and pre-grinding hobbing applications.
Applications:
- Automotive transmission gear manufacturing
- Precision industrial gearboxes
- Power tools, machinery components
- Agricultural and construction equipment
- Aerospace and defense gear systems
Ordering Information:
Please specify when ordering:
- Module/DP/CP (e.g., M12)
- Pressure Angle (e.g., 20°, 30°)
- Coating (TIN/TIAIN/ALCRONA/ALTENSA)
- Accuracy Grade (A, AA, AA+, or AAA)
Accuracy Grade Standards: GB6084/DIN3968/ANSI B94.7/JIS B 4354
- Gear Type (Spur/Helical)
- Cutting Direction (Right-Handed or Left-Handed)
- Bore and OD Diameter, Total Length
- Number of Teeth
- Hob Material: M2/M35/M42/ASP2052/S390/MC90/P6M5/Р6М5К5/Р10К5Ф5
- Carbide
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