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Take a behind-the-scenes look at our CNC milling process for 42CrMo (AISI 4140) press brake tooling.
42CrMo is our material of choice for high-performance bending tools due to its exceptional tenacity and fatigue resistance. In this video, you can see the initial precision milling of a heavy-duty V die, ensuring perfect geometry before it moves to induction hardening and final grinding.
Key Highlights of our 42CrMo Tooling:
High Load Capacity: Designed for high-tonnage bending without deformation.
Precision Machined: CNC milled to strict tolerances for perfect alignment.
Material Integrity: We use genuine 42CrMo/42CrMo4 alloy steel for long-term reliability.
We provide tooling compatible with Amada, Trumpf, LVD, and other major press brake brands.
Lay metal sheet flat on lower tooling
Upper tooling presses down steadily
Material forms permanent bend following tooling contour
Stop pressing once reaching required depth and pressure
Lift upper tooling and take out finished product
Straight edge tooling: Basic choice for regular flat bending
Sharp angle tooling: Used for narrow angle bending and springback adjustment
Gooseneck tooling: Ideal for deep U groove work, avoids collision during processing
Arc tooling: Makes round corners and curved parts
Special shape tooling: Produced according to customer drawings
Standard sheet metal tooling: Suits low carbon steel and galvanized steel, cost effective
High strength steel tooling: Thickened body fits stainless steel and hard alloy plate
Thin plate tooling: Fine machining prevents scratch, warp and deformation
Amada style press brake tooling: Compatible with Amada and Promecam equipment
Trumpf & Wila type: Matches corresponding brand bending machines
Universal standard type: Works with most local bending devices
Sheet 3mm to 8mm thick: V groove width equals 8 times material thickness
Sheet under 3mm: Set groove width as 6 times thickness for neat small corner
Sheet over 8mm: Adopt 10 to 12 times thickness, cut down bending force to protect tooling
Country/Standard Organization | Standard Code | Corresponding Grade |
China (GB) | GB/T 3077 | 42CrMo or 42CrMo4 |
USA (AISI/ASTM) | ASTM A29 | 4140 |
International Organization for Standardization (ISO) | ISO 683-1 | 42CrMo4 |
Germany (DIN) | DIN EN 10083 | 1.7225 (or 42CrMo4) |
Japan (JIS) | JIS G4105 | SCM440 |
UK (BS) | BS 970 | 708M40 (EN19) |








Nanjing Alas International Co., Ltd. is a professional industrial tooling manufacturer focused on shear blades, bending dies, shredder blades, and custom wear parts. We offer full application engineering, material selection, setup guidance, and after-sales support to global customers.
Tell us your requirements, and our engineering team will provide professional solutions for blade specification, tool life optimization, and cost-effective production.
