Aircraft Brake Disc Carrier Forgings — The Torque-Reacting Structure Between Wheel Hub and Rotating Brake Stack
Shivam Forge manufactures forged aircraft brake disc carrier components — the structural torque tube and carrier that mounts the rotating brake disc stack to the wheel and transmits braking torque into the landing gear axle — in high-strength alloy steel and titanium, with manufacturing process control aligned to AS9100 quality management principles. Rajkot, India. Call +91-9265772827.
The brake disc carrier (sometimes called the torque tube or wheel drive key carrier depending on the specific undercarriage architecture) is the structural link that takes braking torque generated by the rotating disc stack — the alternating rotor and stator discs a brake actuation system clamps together during a stop — and transmits that torque into the wheel and, through the wheel bearing arrangement, into the landing gear axle itself, all while the wheel continues to rotate at speed until the aircraft comes to a stop. This is a fundamentally different loading picture from most other landing gear structural components: the carrier sees its highest instantaneous load not from touchdown impact but from peak braking torque during a maximum-energy rejected takeoff or high-speed landing stop, a load case that combines severe torsional loading with the substantial thermal cycling the brake stack generates during that same event, since carbon or steel brake discs can reach several hundred degrees Celsius during a high-energy stop and that heat conducts directly into the carrier structure bolted or splined to the disc stack. Because the carrier must maintain dimensional stability and structural integrity through this combined torsional-thermal loading, repeated across thousands of landing cycles over an aircraft's operating life, carrier forgings are engineered for fatigue life under cyclic torsional load alongside retained strength at elevated temperature — a combination that drives both alloy selection and the forging grain flow orientation used to resist torque-induced crack initiation at the carrier's disc-mounting lugs and axle interface. Distinct from the shock strut piston and cylinder forgings covered elsewhere on this site, which are engineered primarily against vertical impact and bending load, the brake disc carrier's design driver is this torsional-thermal combination specific to its position in the braking load path.
Forged carrier and torque tube blanks that mount to the wheel and provide the splined or lugged interface engaging the rotating brake disc stack, sized against peak torsional load from maximum-energy stop events.
Forged lug and drive key features integral to or attached to the carrier structure, engineered as the specific torque-transfer interface between the rotating disc stack and the carrier body where fatigue crack initiation risk is highest.
Forged wheel hub and bearing interface components adjoining the brake disc carrier assembly, maintaining the dimensional precision the wheel bearing arrangement and axle interface require through repeated thermal cycling.
Forged structural support components for heat shield assemblies protecting adjacent wheel and tire structure from brake stack radiant and conducted heat during high-energy braking events.
Material selection among high-strength alloy steels and titanium alloys balancing strength-to-weight against retained mechanical properties at the elevated temperature brake stack heat soak exposes the carrier structure to.
Forging process and grain flow orientation specifically engineered to resist crack initiation at disc-mounting lugs and drive keys, the carrier locations experiencing the highest concentrated torsional stress during braking events.
Mechanical property testing at both ambient and elevated temperature, confirming carrier material retains the strength and fatigue resistance the combined torsional-thermal service environment requires.
Manufacturing process control aligned to AS9100 quality management principles, with full material chemistry, mechanical property, and NDT documentation supporting aerospace landing gear component specification requirements.
Aircraft wheel brakes work by clamping a stack of alternating rotor and stator discs together, converting the kinetic energy of the moving aircraft into heat through friction — and every bit of the resulting torque has to travel somewhere before it reaches the ground through the tire's contact patch. That path runs directly through the brake disc carrier, the structural component that mounts to the wheel and engages the rotating disc stack through splined lugs or drive keys, meaning the carrier is the single structural element standing between the brake system's full torque output and the wheel and axle assembly that ultimately absorbs it. This makes the carrier's design load case fundamentally torque-driven rather than impact-driven, distinguishing it clearly from the shock strut piston and cylinder structures that absorb touchdown's vertical impact energy elsewhere in the same landing gear assembly.
What makes carrier design genuinely demanding is that this torsional load never arrives in isolation from thermal load. A maximum-energy rejected takeoff or high-speed landing stop generates both the highest torque the carrier will ever see and, simultaneously, the highest brake stack temperature, since carbon or steel brake discs can reach several hundred degrees Celsius converting the aircraft's kinetic energy to heat during exactly that same event. That heat conducts directly from the disc stack into the carrier structure it's mounted to, meaning the carrier material has to retain adequate strength and fatigue resistance not at some safely elevated design margin removed from its actual peak-torque moment, but precisely at the moment its temperature is also highest — a combined torsional-thermal design case that most other landing gear structural components simply don't face in the same way.
This combined loading picture drives both material selection and forging process discipline. High-strength alloy steels and titanium alloys are selected based on the target aircraft's landing weight class and the specific balance the brake system design calls for between strength-to-weight and property retention at elevated temperature, while the forging process itself — particularly grain flow orientation through the disc-mounting lug and drive key features — is engineered specifically to resist crack initiation at these concentrated-stress locations, since repeated torsional cycling across thousands of landing and braking events over an aircraft's operating life makes fatigue life at exactly these features the carrier's governing design consideration.
For airframe, wheel, and brake system manufacturers sourcing forged brake disc carrier and torque tube components, Shivam Forge manufactures high-strength steel and titanium carrier forgings with manufacturing process control aligned to AS9100 quality management principles and full material documentation. Contact our engineering team at +91-9265772827 or sales@shivamforge.com with your carrier drawing and material specification for a manufacturability review and quotation.
The brake disc carrier (or torque tube) mounts to the wheel and provides the structural interface — typically splined lugs or drive keys — that engages the rotating brake disc stack, transmitting the braking torque generated when the brake actuation system clamps the disc stack into the wheel and, ultimately, the landing gear axle. It is the structural link between the rotating brake stack and the wheel/axle assembly.
A landing gear strut is engineered primarily against vertical touchdown impact and bending load. A brake disc carrier's dominant load case is instead peak braking torque during a maximum-energy stop, combined with the substantial thermal cycling the brake disc stack's heat generates during that same event — a torsional-thermal combination distinct from the strut's impact-dominated loading profile.
Carbon or steel brake discs can reach several hundred degrees Celsius during a high-energy stop, and that heat conducts directly into the carrier structure bolted or splined to the disc stack. Carrier material must retain adequate strength and fatigue resistance at this elevated temperature, not just at ambient conditions, which is a specific mechanical property verification we address during material and process selection.
High-strength alloy steels and titanium alloys are the primary material families, selected based on the target aircraft's landing weight class and the strength-to-weight versus elevated-temperature property retention tradeoff the specific brake system design calls for. Provide your material specification and we will confirm forging feasibility.
Our manufacturing process control is aligned to AS9100 quality management principles, and full material chemistry, mechanical property, and NDT documentation is provided. Contact our engineering team directly to discuss current quality certification status for your specific program requirement.
Why Choose Shivam Forge
Shivam Forge delivers precision hot-forged components from our integrated Shapar, Rajkot facility — covering forging, CNC machining, heat treatment, and quality inspection under one roof.
