Tight-tolerance subplate and cover plate machining for flatness-critical sealing faces.
Precision CNC machining for subplates and cover plates with ±0.001″ locations and 0.0005″ flatness. Accurate port and bolt patterns prevent leaks and rush rework, keeping assemblies on schedule with fast, reliable quoting.
Precision CNC Machining for Subplates & Cover Plates
Subplates and cover plates in power units, manifolds, and machinery frames where flatness, hole location, and thickness control are critical to sealing, alignment, and serviceability.
Hydraulic manifold subplates with port and bolt patterns
Cover plates for pressure-retaining housings and reservoirs
Mounting subplates for valves, pumps, and actuators
Precision ground cover plates for gasketed sealing faces
Subplates with dense bolt circles and dowel locations
Thick billet cover plates with counterbores and recesses
Alignment subplates for machine bases and frames
How We Deliver Consistent, High-Accuracy Results
Controlled feature relationships keep port patterns, bolt circles, and dowels aligned across every release.
Fewer setups reduce stack-up error, improving sealing faces and critical thickness across large plates.
Stable processes lock in batch repeatability so replacement plates drop in without rework.
Predictable lead times support planned outages and scheduled builds instead of last-minute fire drills.
Industries That Rely on T&D for Subplate & Cover Plate Machining
Trusted where hydraulic, pneumatic, and mechanical systems depend on flat, accurate plates.
Hydraulic power units
Presses and forming equipment
Mobile equipment OEMs
Material handling and conveyors
Industrial machinery builders
Injection molding machinery OEMs
Fluid power systems integrators
Test stands and R&D equipment
Technical Capabilities
Materials
4140 / 4340 alloy steel subplates and cover plates
1018 and low-carbon steel for structural plates
6061 and 7075 aluminum billet plates
Stainless and ductile iron for corrosion- and wear-critical applications
Common Features
Port networks, bolt patterns, counterbores, and tapped holes in one controlled setup
Sealing faces, O-ring grooves, and gasket lands machined for leak-tight assemblies
Dowel holes, slots, and alignment features for accurate mounting and repeatable replacement plates
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