What These Brackets Do That Sheet Metal Can't These Cnc Machined Antenna Mount Brackets are solid blocks of aluminum or stainless steel milled into rigid, corrosion-resistant platforms for antennas, R
These Cnc Machined Antenna Mount Brackets are solid blocks of aluminum or stainless steel milled into rigid, corrosion-resistant platforms for antennas, RF modules, and GPS receivers. Unlike stamped or bent sheet metal, a CNC-machined bracket holds its geometry under vibration and thermal cycling—critical for directional antennas where a 0.5° angular shift kills signal strength. We hold flatness to 0.02mm over 100mm and hole-to-hole true position to 0.05mm, so your antenna boresight stays locked.
You get a repeatable mounting surface with a surface finish of Ra 0.8µm on mating faces, and we can hold edge break tolerances to 0.1mm so sharp corners never damage cables. For outdoor or marine use, we offer hard anodizing (Class II, 50µm thickness) that resists salt spray for 336 hours per ASTM B117. Every bracket is deburred and inspected; we do not ship flashing or tool marks.
We machine brackets from two primary alloys, and the choice changes your bracket's stiffness-to-weight ratio and corrosion resistance. 6061-T6 (yield 276 MPa) is our default: it welds, anodizes cleanly, and costs less. For high-vibration masts or heavy antennas (over 5 kg), we recommend 7075-T6 (yield 503 MPa) — nearly double the strength, but at a 15% higher material cost. Both are supplied with mill certificates, and we verify hardness on every batch with a Rockwell tester (Brinell 95 for 6061, Brinell 150 for 7075).
For stainless steel requirements, we machine 304 or 316L. 316L adds molybdenum for chloride resistance—suitable for offshore or coastal installations. We do not use mystery alloys; every bar is traceable to its heat number. If your drawing specifies a different alloy (e.g., brass for RF grounding), we can source and certify it within 48 hours.
Runout on the main mounting bore is the enemy. If the bore centerline wobbles relative to the mounting face, your antenna tilts, and beam pattern distorts. We achieve 0.01mm total indicated runout (TIR) on the primary bore by machining the bracket in one setup on a 4-axis mill. We never flip the part between the bore and the face.
Our CNC cell uses 10,000-rpm spindles with hydraulic toolholders to minimize deflection. For the critical bore, we use a finish pass with a 0.2mm depth of cut at 0.05mm/rev feed. This produces a consistent 0.8µm Ra finish inside the bore, which also helps with proper torque of the locking screw without galling. We document runout on the inspection report for every part, not just the first article.
Antenna mounts face constant wind-induced vibration. A tapped hole in bare aluminum will strip after repeated assembly cycles. We offer two solutions. First, we cut threads to 2B class per ASME B1.13M, with a thread depth of 1.5x diameter. Second, for any hole that sees assembly more than five times, we install stainless steel helical inserts (e.g., 4-40 to 3/8-16) at no extra charge if specified on the drawing.
For RF grounding, we can machine a conductive gold-plated contact surface on the bracket foot. We also offer cross-drilled holes for safety wire, per MIL-STD-3350, which prevents fasteners from backing out. If you don't want inserts, we can specify a Loctite thread-locking compound application before shipment—just note it in your RFQ.
You do not need to trust our word. For every order, we provide a full dimensional inspection report (FAI) with a CMM (Coordinate Measuring Machine) measurement of critical features. We measure: bore diameter, true position of mounting holes, flatness of the base, surface finish (using a profilometer), and hardness (Rockwell B). For orders over 50 pieces, we include an X-bar and R chart showing process stability.
We also provide a material certificate (EN 10204 3.1) and a RoHS/REACH compliance declaration. If you need PPAP Level 3, we can generate it—just request it at the quote stage. Our QC team is independent from production; they have the authority to stop a shipment if any tolerance is out of spec.
Standard machining leaves Ra 1.6µm. For sealing surfaces on RF gaskets, we offer a polished finish at Ra 0.4µm. For exterior brackets, we recommend hard anodizing to 50µm thickness (per MIL-A-8625 Type III), which gives a matte black or gray color and a surface hardness of 60 HRC equivalent. This is not cosmetic; it prevents galvanic corrosion between the aluminum bracket and stainless steel fasteners.
If you need a specific color (e.g., military green or white for solar reflection), we use a dye step after anodizing. We do not paint brackets because paint chips and hides cracks. Anodizing is the only finish we offer for aluminum. For stainless steel, we can passivate per ASTM A967 to remove free iron and improve corrosion resistance.
Standard lead time for Cnc Machined Antenna Mount Brackets is 7 business days for quantities up to 500 pieces. Prototypes (1-5 pieces) ship in 24-48 hours via DHL or FedEx Express. We keep a buffer stock of 6061-T6 and 7075-T6 bars in common sizes (e.g., 25mm, 50mm, 75mm round and rectangular), which eliminates material procurement delays.
We ship worldwide from our factory in Dongguan, China. Most orders arrive in 3-5 days to the USA or Europe. We do not require a minimum order quantity—we will machine a single prototype for you. Shipping costs are calculated per actual weight and dimension; we can also consolidate multiple parts into one box to reduce freight.
| Parameter | Value / Range |
|---|---|
| Materials | 6061-T6, 7075-T6, 304, 316L, Brass C360 |
| Hardness (Aluminum) | Brinell 95 (6061) / Brinell 150 (7075) |
| Tolerance (Linear) | ±0.005mm (typical), ±0.02mm (standard) |
| True Position (Holes) | 0.05mm |
| Flatness (Base) | 0.02mm over 100mm |
| Runout (Main Bore TIR) | 0.01mm |
| Surface Finish (Machined) | Ra 0.8µm (standard), Ra 0.4µm (polished) |
| Thread Class | 2B per ASME B1.13M |
| Anodizing Thickness | Up to 50µm (Class II, Type III) |
| Lead Time (Standard) | 7 business days (up to 500 pcs) |
| Prototype Lead Time | 24-48 hours |
| MOQ | No MOQ (single piece accepted) |
Not all antenna brackets are simple flat plates. Some have thin walls, deep pockets, or tapped blind holes. The tooling we use determines the cost and quality. For deep pockets (depth > 3x diameter), we use variable-flute end mills to reduce chatter. For fine threads, we use thread mills instead of taps—this reduces breakage in 7075 aluminum and allows for tighter pitch tolerances. If you are designing a bracket with unusual features, our CNC cutting tool selection guide explains how tool geometry affects the finish on aluminum and stainless steel.
If you over-specify tolerances, you pay for machining time that is not needed. If you under-specify, you risk assembly issues. We recommend the following: use ±0.1mm for non-critical hole locations, ±0.02mm for mounting surfaces, and ±0.005mm only for the bore that locates the antenna. The industry standard is ISO 2768-mK for general tolerances, but we can work to your specific GD&T per ASME Y14.5. For a detailed breakdown of what each tolerance grade costs, see our CNC machining tolerances guide. We will review your drawing for free and flag any tolerances that are unnecessarily tight.
No MOQ—we machine a single prototype or a million pieces; the unit price simply decreases with volume.
Yes, we can reverse-engineer a sample (with 3D scanning) or work from a PDF sketch, but a STEP or IGES file gives the best accuracy.
We send a video of the first article machining, full CMM reports, and offer a third-party inspection (e.g., SGS) at your cost before shipment.
Send your 3D drawing (STEP) or 2D PDF to sc@bquq.com; we return a firm quotation within 12 hours on business days.
Stop guessing about offshore manufacturing risk. We are a 20-year precision manufacturing factory in Dongguan, China, with in-house CNC machining, stamping, springs, and heat sinks. We offer Cnc Machined Antenna Mount Brackets with real inspection data, no MOQ, and a 7-day lead time. Send your drawing today.
Email: sc@bquq.com | WhatsApp: +86 13713157787
We reply to every RFQ within 12 hours—often faster. Attach your STEP or PDF, and we will send a firm price, lead time, and DFM feedback. No sales pressure, just numbers.
| Parameter | Capability |
|---|---|
| Materials | AL6061/7075, SUS303/304/316, 45# steel, T2 copper, H59 brass, POM, PEEK, nylon |
| Tolerance | ±0.005mm standard, ±0.003mm on request |
| Machines | 3/4/5-axis CNC, turn-mill, Swiss lathe |
| Surface | Anodizing, nickel, zinc, passivation, sandblast, polish |
| Size Range | Max 400 x 300 x 200 mm |
| Prototype | 72 hours, no MOQ on samples |
| Inspection | Full report per batch, CMM data on request |
