Brake Caliper
Description
Forged Aluminum Bicycle Brake Caliper (Twin Bore): Disc Brake Caliper Body Forging
This forged aluminum bicycle brake caliper is the caliper body forging of a bicycle hydraulic disc brake. A central body spans the rotor, with piston bore bosses on both sides and mounting ears extending at each end to fix the caliper to the frame or fork mount. The body carries piston force and rotor torque under braking, and its stiffness directly affects brake feel.
With a three-dimensional body, thick bore bosses and slender mounting ears, the caliper requires blocker and finisher forging stages. Al Forge Tech (AFT) closed-die hot forges it so bores and ears fill completely with continuous grain flow, then raises strength by in-house T6 heat treatment. Piston bores, fluid passages and mounting holes are machined on 4.5-axis CNC and inspected by CMM and fluorescent penetrant inspection.
Key Features
- Caliper body, twin bore bosses and mounting ears forged in one piece
- Blocker and finisher stages ensure complete fill of the bore bosses
- Piston bores, fluid passages and mounting holes on 4.5-axis CNC
- Fluorescent penetrant and CMM inspection
Forged Aluminum Bicycle Brake Caliper (Twin Bore) Specifications and Manufacturing Capability
| Item | Details |
|---|---|
| Product category | Aluminum Forging Bicycle Parts |
| Application | Hydraulic disc brake calipers for bicycles and e-bikes |
| Primary process | Closed-die hot forging (hot forging presses 600T–8,000T) |
| Material | Selected to customer specification; 2xxx, 5xxx, 6xxx and 7xxx series aluminum alloys available (e.g. 2014, 6061, 6082, 7075) |
| Heat treatment | In-house T4 solution treatment (8 units) and T6 artificial aging (7 units), set by alloy and strength requirement |
| Secondary machining | CNC machining (52 machining centers, 30 lathes), deburring, vibratory finishing |
| Surface finish | Anodizing (including hard anodizing), shot blasting, e-coating or painting, as required |
| Inspection | Zeiss CMM (4 units), hardness testers, spectrometer, fluorescent penetrant inspection line |
| Dimensions and tolerances | Per customer 2D/3D drawings |
| Quality system | IATF 16949:2016, ISO 14001:2015 |
Forged Aluminum Bicycle Brake Caliper (Twin Bore) Manufacturing Process
- Drawing review and DFM: we confirm alloy, load direction and critical dimensions, then run QForm simulation to predict metal flow and defect risk.
- Die design and manufacturing: the number of die sets (for example, blocker and finisher dies) is planned around part complexity, and die contours are checked with a portable 3D scanner.
- Hot forging: closed-die forming on 600T–8,000T hot forging presses creates a continuous grain flow that follows the part contour.
- Heat treatment: T4 solution treatment and T6 artificial aging are performed in-house, with parameters set by alloy and strength requirement.
- CNC machining and finishing: holes, threads and mating surfaces are machined, followed by deburring, vibratory finishing, shot blasting or anodizing as required.
- Inspection and shipment: dimensions, hardness and chemical composition are verified with CMM, hardness testers and a spectrometer, with lot traceability kept under IATF 16949.
FAQ
Why is forging well suited to bicycle disc brake calipers?
The caliper carries piston force and rotor torque under braking, and a stiffer body gives a more direct brake feel. Forged aluminum is dense and free of the porosity common in castings, so leaks are less likely after machining piston bores and fluid passages. Continuous grain flow also gives higher strength at the same weight, suiting light, high-performance bicycle disc brakes.
What brake caliper experience does AFT have?
AFT produces forged and machined brake calipers for two-, three- and four-wheeled vehicles, including bicycle disc brake calipers, motorcycle and powersport calipers, and automotive monobloc caliper forgings. This experience helps evaluate die sets, alloy and machining approach for a new caliper.
Is heat treatment for the Forged Aluminum Bicycle Brake Caliper (Twin Bore) done in-house?
Yes. Al Forge Tech operates 8 T4 solution treatment units and 7 T6 artificial aging units on site, so the Forged Aluminum Bicycle Brake Caliper (Twin Bore) can be solution treated, quenched and aged in the same facility before machining and inspection. Keeping heat treatment in-house removes inter-plant transport, reduces lead-time risk and keeps lot traceability within one quality system. Parameters are set according to the alloy grade and your specification.
How do you keep the Forged Aluminum Bicycle Brake Caliper (Twin Bore) consistent from lot to lot?
Al Forge Tech runs incoming (IQC), in-process (IPQC) and final (FQC) inspection under IATF 16949:2016, supported by 4 Zeiss CMMs, hardness testers, a spectrometer and a fluorescent penetrant inspection line. First, middle and last pieces of every lot are checked against the die; when wear causes dimensional drift, the die is reworked to keep the Forged Aluminum Bicycle Brake Caliper (Twin Bore) stable across lots.
How does a forged aluminum Forged Aluminum Bicycle Brake Caliper (Twin Bore) compare with casting or machining from billet?
Forged Aluminum Bicycle Brake Caliper (Lightweight): Compact Disc Brake Caliper Forging
This lightweight forged aluminum bicycle brake caliper is a disc brake caliper body forging with a more compact shape: a smaller central body, mounting ears extending outward and bosses for the hose fitting and bleed valve. The compact body reduces caliper weight and suits weight-focused road and cross-country mountain bikes.
The more compact the body, the more precisely material must be distributed between bosses and ears. Al Forge Tech (AFT) closed-die hot forges the body and bosses and confirms fill of the small bosses with QForm simulation. After heat treatment, piston bores, fluid passages, fitting threads and mounting holes are CNC-machined, and mounting-hole spacing and bore positions are verified on CMM.
Key Features
- Compact body reduces caliper weight
- Hose-fitting and bleed-valve bosses forged in
- Piston bores, fluid passages and fitting threads CNC-machined
- Mounting-hole spacing and bore positions measured on CMM
Forged Aluminum Bicycle Brake Caliper (Lightweight) Specifications and Manufacturing Capability
| Item | Details |
|---|---|
| Product category | Aluminum Forging Bicycle Parts |
| Application | Hydraulic disc brake calipers for road and cross-country mountain bikes |
| Primary process | Closed-die hot forging (hot forging presses 600T–8,000T) |
| Material | Selected to customer specification; 2xxx, 5xxx, 6xxx and 7xxx series aluminum alloys available (e.g. 2014, 6061, 6082, 7075) |
| Heat treatment | In-house T4 solution treatment (8 units) and T6 artificial aging (7 units), set by alloy and strength requirement |
| Secondary machining | CNC machining (52 machining centers, 30 lathes), deburring, vibratory finishing |
| Surface finish | Anodizing (including hard anodizing), shot blasting, e-coating or painting, as required |
| Inspection | Zeiss CMM (4 units), hardness testers, spectrometer, fluorescent penetrant inspection line |
| Dimensions and tolerances | Per customer 2D/3D drawings |
| Quality system | IATF 16949:2016, ISO 14001:2015 |
Forged Aluminum Bicycle Brake Caliper (Lightweight) Manufacturing Process
- Drawing review and DFM: we confirm alloy, load direction and critical dimensions, then run QForm simulation to predict metal flow and defect risk.
- Die design and manufacturing: the number of die sets (for example, blocker and finisher dies) is planned around part complexity, and die contours are checked with a portable 3D scanner.
- Hot forging: closed-die forming on 600T–8,000T hot forging presses creates a continuous grain flow that follows the part contour.
- Heat treatment: T4 solution treatment and T6 artificial aging are performed in-house, with parameters set by alloy and strength requirement.
- CNC machining and finishing: holes, threads and mating surfaces are machined, followed by deburring, vibratory finishing, shot blasting or anodizing as required.
- Inspection and shipment: dimensions, hardness and chemical composition are verified with CMM, hardness testers and a spectrometer, with lot traceability kept under IATF 16949.
FAQ
How does a lightweight caliper balance weight and stiffness?
Weight is usually removed from lightly loaded areas while keeping section around the bore bosses and at the roots of the mounting ears. Forging gives the remaining material continuous grain flow and a dense structure, maintaining strength in a smaller section. The actual sections and lightening layout must be confirmed by the brand’s structural analysis and brake testing, and AFT can advise on forging features at the DFM stage.
Which standards must the caliper mounting holes match?
Common bicycle disc caliper mounts include post mount and flat mount, each with its own hole spacing and mounting-face specification. AFT machines the mounting holes and faces to the brand’s drawing and measures spacing, diameter and flatness on CMM to ensure correct fit with the frame or fork mount.
How does a forged aluminum Forged Aluminum Bicycle Brake Caliper (Lightweight) compare with casting or machining from billet?
Forging shapes aluminum in the solid state under pressure, so the grain flow follows the part contour and the porosity and shrinkage common in castings are avoided. Compared with machining from solid billet, a near-net-shape forging removes less material and shortens machining time. For a Forged Aluminum Bicycle Brake Caliper (Lightweight) under repeated loads, forging balances strength and weight; the final choice still depends on design loads and volume.
How are MOQ and lead time for the Forged Aluminum Bicycle Brake Caliper (Lightweight) determined?
MOQ and lead time depend on part size, number of die sets, alloy and machining scope, and are confirmed in the quotation after drawing review. The typical sequence is die development, forged samples, sample approval and then mass production. Sharing your annual volume and call-off schedule helps us plan dies and capacity for the Forged Aluminum Bicycle Brake Caliper (Lightweight).
Can you assess forging feasibility while the Forged Aluminum Bicycle Brake Caliper (Lightweight) is still in design?
Yes. Al Forge Tech works mainly as an OEM supplier, and our engineers can give design-for-manufacturability (DFM) feedback at the concept or drawing stage, such as adjusting thin ribs, abrupt section changes or draft angles to avoid laps and underfill. QForm simulation predicts metal flow early, and the results are cross-checked against our die design experience.
Request a Quote for the Forged Aluminum Bicycle Brake Caliper (Lightweight)
Developing a new Forged Aluminum Bicycle Brake Caliper (Lightweight) or converting an existing part to aluminum forging? Send us your 3D/2D drawings, alloy and temper, annual volume and finishing requirements. Our engineering team will reply with a feasibility review, die plan and quotation.
Forging shapes aluminum in the solid state under pressure, so the grain flow follows the part contour and the porosity and shrinkage common in castings are avoided. Compared with machining from solid billet, a near-net-shape forging removes less material and shortens machining time. For a Forged Aluminum Bicycle Brake Caliper (Twin Bore) under repeated loads, forging balances strength and weight; the final choice still depends on design loads and volume.
Request a Quote for the Forged Aluminum Bicycle Brake Caliper (Twin Bore)
Developing a new Forged Aluminum Bicycle Brake Caliper (Twin Bore) or converting an existing part to aluminum forging? Send us your 3D/2D drawings, alloy and temper, annual volume and finishing requirements. Our engineering team will reply with a feasibility review, die plan and quotation.
- Online inquiry: Contact Us
- Email: [email protected]
To compare similar parts, browse Aluminum Forging Bicycle Parts and our automotive aluminum forging applications, or visit About Us for our equipment and certifications.
