Valve bodies and hydraulic manifolds contain mounting holes, threaded-hole preparation, valve ports, cross holes, intersecting passages, deep blind holes, stepped holes, and precision connection features.
Cross-hole breakthrough can produce internal burrs and unstable cutting loads, while deep passages require reliable coolant delivery and chip evacuation. Port position, hole depth, and passage alignment must also remain consistent to support subsequent assembly and fluid routing.
Landun CNC Tool provides standard and custom carbide drill solutions based on component drawings, workpiece materials, hole dimensions, passage layouts, tolerances, coolant conditions, and production requirements.
Hydraulic valve bodies and manifold blocks often contain multiple cross holes and intersecting fluid passages.
When a drill breaks into an existing passage, cutting loads may become uneven. This can create drill deflection, edge chipping, enlarged breakthrough areas, hanging chips, or internal burrs that are difficult to inspect and remove.
One cutting edge may lose material support before the other as the drill enters an existing hole. Excessive feed, high runout, long tool overhang, unstable fixturing, or unsuitable drill geometry can increase the resulting impact.
Chips may also remain trapped at the intersection between connected passages.
Rigid toolholding, low spindle runout, controlled breakthrough feed, suitable drill-point geometry, and stable component clamping help reduce impact during passage intersection.
Through-tool coolant and a planned drilling sequence can improve chip removal. Drawing-based custom drill geometry may be considered for repeated cross-hole applications with difficult breakthrough conditions.
Manifold blocks, directional valve bodies, pressure-control components, and fluid distribution parts may contain deep blind holes or long internal passages.
These applications may experience chip congestion, rising cutting temperature, drill deviation, poor hole straightness, unstable depth, or premature tool breakage.
As drilling depth increases, chips must travel farther through the drill flutes. Insufficient coolant pressure, unsuitable drilling cycles, excessive runout, inaccurate pilot holes, or poor machine rigidity can restrict chip evacuation.
Packed chips increase friction and may damage both the drill and the internal hole surface.
Internal-coolant carbide drills deliver coolant directly toward the cutting zone and help move chips through long flutes.
Accurate pilot holes, suitable flute geometry, stable coolant pressure, controlled entry and withdrawal, and appropriate drilling cycles improve deep-hole stability and passage consistency.
Valve bodies and manifolds may contain several holes drilled from different faces that must connect with internal fluid passages.
Hole-position variation, drill deviation, or incorrect depth can cause incomplete passage connection, excessive intersection, thin remaining walls, or dimensional inconsistency between production parts.
Tool deflection, unstable drill entry, excessive working length, inaccurate component positioning, fixture variation, and spindle runout can affect the final hole path.
Long or small-diameter holes are especially sensitive to entry error because small deviations increase as drilling depth grows.
Accurate spotting or pilot drilling, rigid fixturing, short tool overhang, low-runout holders, controlled drill geometry, and stable cutting parameters help maintain hole position.
For long passages, a suitable pilot drill and deep-hole drilling procedure can improve entry alignment and hole straightness.
Hydraulic ports, cartridge interfaces, threaded connections, plug holes, sealing-related features, and mounting interfaces may require stepped diameters, controlled shoulders, flat bottoms, chamfers, or accurate thread-preparation holes.
Variation between these features can affect subsequent tapping, fitting position, plug installation, cartridge assembly, and sealing-component alignment.
Using several separate tools increases the number of positioning and tool-change operations. Tool deflection, drill-point allowance, inconsistent depth control, and accumulated positioning errors can affect shoulder location, bottom depth, concentricity, and step dimensions.
Spot, step, flat-bottom, chamfer, and combined custom carbide drills can machine related features in fewer operations.
This helps improve feature concentricity, shoulder consistency, depth control, thread-preparation accuracy, and production efficiency.
Valve bodies and manifold blocks may be manufactured from cast iron, carbon steel, alloy steel, stainless steel, or aluminum alloys.
Using the same drill geometry and cutting parameters across different materials may lead to rapid tool wear, built-up edge, poor chip control, unstable hole quality, or inconsistent production life.
Each material produces different cutting loads, chip forms, heat conditions, and wear mechanisms.
Cast iron can be abrasive, stainless steel may work-harden, alloy steel increases cutting resistance, and aluminum may adhere to unsuitable cutting edges or flute surfaces.
Material-specific drill geometry, carbide grade, edge preparation, coating, flute design, and coolant strategy help maintain stable cutting performance.
The drill specification should be matched to the workpiece material, hardness, hole depth, machine conditions, and production target.
Typical drilling applications include long distribution passages, cross holes, blind holes, threaded ports, mounting holes, plug holes, and fluid connections machined from several component faces.
Common components include directional valve bodies, pressure-control valves, flow-control valves, relief-valve bodies, and compact control blocks containing valve ports, connection holes, mounting holes, and internal passages.
Typical applications include cartridge-valve interfaces, pilot holes, threaded-hole preparation, stepped connection holes, plug holes, locating features, and related fluid passages.
Common applications include inlet and outlet ports, threaded connections, plug holes, mounting interfaces, sensor ports, pressure-test holes, and small control passages.
For mounting holes, connection holes, threaded-hole preparation, blind holes, through holes, ports, and general production drilling in valve bodies and hydraulic manifolds.
For small control passages, pilot holes, sensor ports, pressure-test holes, and compact precision features requiring low runout and stable dimensional control.
For long internal passages, deep blind holes, axial channels, and manifold holes requiring reliable coolant delivery, chip evacuation, and hole straightness.
For cross holes, stepped ports, flat-bottom features, special diameters, combined operations, cartridge interfaces, and drawing-based hydraulic components.
| INFORMATION | WHY IT MATTERS |
|---|---|
| Component drawing | Confirms hole geometry, entry angle, step features, tolerances, curved surfaces, and special requirements. |
| Workpiece material and hardness | Helps determine drill geometry, carbide grade, coating direction, edge preparation, and cutting parameters. |
| Hole diameter, depth, and type | Defines drill size, working length, depth-to-diameter ratio, and blind- or through-hole requirements. |
| Tolerance and surface finish | Helps evaluate dimensional accuracy, hole quality, and finishing requirements. |
| Machine, holder, and coolant conditions | Helps assess runout, rigidity, coolant pressure, and chip-evacuation stability. |
| Current problem and production target | Clarifies tool wear, burrs, chip packing, deviation, breakage, tool-life, or efficiency targets. |
Review the component drawing, workpiece material, hole structure, machine conditions, and current drilling problem.
Select a suitable standard drill series or develop a custom drill based on hole depth, tolerance, entry conditions, and machining requirements.
Produce the drill with controlled geometry, edge preparation, coating selection, and multi-stage inspection to support consistent quality.
Support sample testing, specification confirmation, and stable repeat production after the drill solution is approved.
Walter 5-axis grinding supports stable drill-point geometry, flute consistency, diameter accuracy, and shank concentricity.
Controlled edge preparation helps improve cutting-edge consistency, coating adhesion, wear resistance, and tool-life stability.
Coating selection is matched to the workpiece material and drilling conditions to improve wear resistance, heat control, and cutting stability.
HELICHECK PLUS and 150× / 300× visual inspection help verify dimensions, cutting edges, coating appearance, and overall tool condition.
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