Tight-tolerance machining for 4140/4340 billet components with controlled feature relationships and flat mounting faces.
Precision machining for 4140/4340 billet components with repeatable feature relationships across batches. We hold ±0.0005″ on critical bores and faces, reduce scrap from misaligned bolt patterns, and turn quotes quickly so production stays on schedule.
Precision CNC Machining for 4140/4340 Billet Components
We machine 4140/4340 billet components used in power transmission, structural supports, and heavy-duty mounting interfaces where strength, fatigue resistance, and tight feature relationships are critical. Typical work includes multi-face parts with critical bores, bolt circles, and sealing or mounting surfaces that must stay aligned through production and service loads.
Billet bearing blocks and pillow block bodies
Torque arms, brackets, and structural mounting lugs
Coupling hubs, flanges, and keyed shaft interfaces
Billet machine bases and riser blocks
Gear blanks and spline-ready billets
Heavy-duty clevises and linkage components
High-strength clamping blocks and clamp plates
How We Deliver Consistent, High-Accuracy Results
Critical faces and bores machined in one controlled setup to maintain feature alignment.
Minimized re-clamping reduces stack-up error and eliminates variability from multiple handling steps.
Documented process controls keep dimensions stable from prototype runs through long-term production batches.
Quoted lead times matched by disciplined scheduling, reducing fire-drills and last-minute expediting.
Industries That Rely on T&D for 4140/4340 Billet Component Machining
High-strength billet components for demanding industrial equipment.
Mining and aggregates
Mobile hydraulics
Construction equipment
Material handling and conveyors
Steel mills and metals processing
Heavy vehicle and off-road
Oil, gas, and energy
Industrial machinery OEMs
Technical Capabilities
Materials
4140 alloy steel billet (normalized, quenched and tempered)
4340 alloy steel billet for high-strength, fatigue-critical parts
Carbon steels such as 1018, 1045 for related components
Stainless and aluminum for complementary mating components
Common Features
Finished bores, counterbores, keyways, and tapped hole patterns in a single controlled setup
Multi-face machining with controlled parallelism, perpendicularity, and flat mounting or sealing faces
Prototype to production batches with documented inspection, consistent setups, and repeatable reruns
Frequently Asked Questions
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T&D Machine
Serious Machining for Serious Parts.
Contact
Email: sales@tdmachine.net
Phone: (262) 781-3870
Location
Wisconsin, USA