Landing gear and actuation components contain mounting holes, locating holes, pin-hole preparation, lubrication passages, hydraulic channels, cross holes, threaded-hole preparation, sensor ports, blind holes, stepped holes, and other precision features.
These applications are commonly found in landing gear struts, cylinder housings, trunnions, bogie components, structural links, actuator bodies, hydraulic manifolds, valve housings, pins, shafts, rod ends, and attachment fittings.
Workpiece materials may include high-strength alloy steel, hardened steel, titanium alloys, stainless steel, aluminum alloys, and other aerospace structural materials. Thick sections, forged or cylindrical surfaces, long internal passages, high cutting loads, interrupted breakthroughs, and close positional requirements increase the risk of drill walking, cutting-edge wear, chip packing, internal burrs, and hole deviation.
For close-fit pin, bearing, and actuator-related features, carbide drilling may also be used to prepare a stable hole before reaming, boring, or another finishing process.
Landun CNC Tool supports drill selection and custom carbide drill development based on the component drawing, material grade, hardness, hole diameter and depth, entry surface, passage intersection, tolerance, coolant method, and current machining problem.
Landing gear struts, trunnions, structural links, actuator rods, pins, and attachment fittings manufactured from high-strength steel, hardened steel, titanium, or stainless steel may cause rapid flank wear, edge chipping, rising spindle load, and unstable tool life.
These materials create high cutting loads and concentrated cutting heat. Forged surfaces, local hardness variation, material work hardening, insufficient coolant delivery, and unsuitable edge preparation can further accelerate coating wear and cutting-edge damage.
Material-specific drill geometry, suitable carbide grades, controlled edge preparation, wear-resistant coatings, and stable coolant delivery help improve cutting-edge strength and tool-life consistency. Cutting parameters should be matched to the material condition, hole depth, machine rigidity, and production requirement.
Actuator bodies, landing gear housings, hydraulic manifolds, cylinder components, shafts, and trunnions may contain long oil-feed holes, pressure passages, lubrication channels, and deep blind holes that are prone to chip congestion.
Long drilling depth, limited flute capacity, high material strength, insufficient coolant pressure, excessive runout, or chips entering an intersecting passage can interrupt normal chip evacuation and increase heat near the cutting edge.
Through-tool coolant, suitable flute geometry, stable coolant pressure, rigid toolholding, and controlled drilling parameters help remove chips and reduce cutting heat. Longer holes may require an accurate pilot hole and controlled entry, drilling, breakthrough, and withdrawal.
Struts, cylinders, pins, shafts, trunnions, lugs, and forged structural parts may require drilling on curved surfaces, angled bosses, irregular forging surfaces, narrow flanges, or partially interrupted areas.
Uneven initial drill contact creates unbalanced cutting forces. Excessive tool overhang, spindle runout, insufficient fixture rigidity, forging variation, or unsuitable point geometry can cause drill walking, deflection, incorrect hole position, or cutting-edge chipping.
A short and rigid spotting operation, low-runout toolholding, stable fixturing, and suitable drill-point geometry help improve initial positioning. Flat-bottom or drawing-based custom drills may be used for strongly curved, angled, or interrupted entry conditions.
Hydraulic passages, radial lubrication holes, cross holes, sensor ports, and pin-related features may break into existing bores, internal cavities, or other drilled channels, creating internal burrs, residual chips, and unstable cutting loads.
When the drill enters an existing passage or exits a reduced wall section, cutting support decreases suddenly. Excessive feed, unsuitable point geometry, weak clamping, long tool overhang, or an incorrect drilling sequence can increase impact and burr formation.
Controlled feed near breakthrough, stable drill geometry, rigid workholding, suitable edge preparation, and through-tool coolant help reduce impact loading and remove chips. Custom drill geometry can be developed according to the passage angle, remaining wall thickness, and intersection diameter.
Landing gear and actuation parts may contain pin-hole preparation, bearing-related holes, locating holes, mounting patterns, stepped features, and close-tolerance holes requiring stable position, diameter allowance, straightness, and concentricity.
Forging variation, uneven entry surfaces, fixture movement, drill runout, long tool reach, accumulated tool wear, and repeated tool changes can affect feature accuracy and the allowance left for later finishing.
Stable point geometry, low-runout toolholding, controlled working length, rigid fixturing, and consistent edge preparation help improve drilling repeatability. Step and custom preparation drills can also maintain a controlled relationship between several diameters or related features.
Common drilling applications include mounting holes, lubrication passages, hydraulic channels, sensor ports, threaded-hole preparation, blind holes, radial holes, and preparation holes for pin- or bearing-related features.
Typical features include pin-hole preparation, locating holes, mounting holes, bolt-hole preparation, lubrication holes, threaded-hole preparation, blind holes, and stepped attachment features.
Common applications include pressure passages, return channels, cross holes, threaded ports, plug-hole preparation, mounting holes, sensor holes, blind holes, and stepped fluid connections.
Typical drilling applications include axial lubrication holes, radial holes, cross holes, retaining-pin holes, sensor-related holes, threaded-hole preparation, blind holes, and small precision features.
For mounting holes, locating holes, pin-hole preparation, threaded-hole preparation, blind holes, and general drilling in landing gear housings, trunnions, links, actuator bodies, and structural fittings.
For small lubrication passages, sensor holes, compact valve features, pin-related holes, vent holes, and other small-diameter precision applications.
For long hydraulic passages, axial lubrication holes, deep housing features, extended pressure channels, and other high depth-to-diameter drilling applications.
For curved or angled entry, radial holes, intersecting passages, stepped features, flat-bottom blind holes, combined diameters, special lengths, and drawing-based non-standard actuation features.
| INFORMATION | WHY IT MATTERS |
|---|---|
| Component drawing | Confirms hole positions, passage layout, pin and bearing features, entry angles, intersections, tolerances, and special requirements. |
| Workpiece material and condition | Helps determine carbide grade, drill geometry, edge preparation, coating, coolant demand, and cutting parameters. |
| Component dimensions and section thickness | Helps evaluate rigidity, workholding, breakthrough conditions, tool access, and required working length. |
| Hole diameter, depth, and type | Defines drill size, depth-to-diameter ratio, and blind-, through-, radial-, axial-, step-, or micro-hole requirements. |
| Entry surface and drilling direction | Helps assess curved or forged entry, drill walking, spotting requirements, and the need for special point geometry. |
| Passage intersections and remaining wall thickness | Helps evaluate breakthrough stability, internal burr risk, passage alignment, and component strength. |
| Position, straightness, and finishing allowance | Helps determine runout limits, pilot-hole requirements, preparation-hole size, depth control, and inspection needs. |
| Machine, holder, fixture, and coolant conditions | Helps evaluate machine rigidity, spindle runout, component support, coolant pressure, filtration, and chip evacuation. |
| Current machining problem and production target | Clarifies tool wear, chip packing, drill deviation, burrs, breakage, hole variation, tool life, or cycle-time 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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