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Aluminum CNC Machining Service

Get custom aluminum parts machined to your drawing, from one prototype to a full production run. Ten alloys in stock, with anodizing, powder coating and polishing done in house.

aluminum cnc machining

Aluminum in CNC Machining

Aluminum cuts faster than steel, which keeps machine time and cost down. It weighs about a third as much at 2.7 g/cm³, conducts heat and electricity well, and forms its own oxide layer against corrosion. It also anodizes cleanly, so you can add hardness and colour without a separate coating. For most parts that need metal strength without the weight, aluminum is the first alloy worth pricing.

Alloys available6061, 6061-T6, 6063, 6082, 5052, 5083, 2024, 7075, 7075-T6, ADC12
価格$
リードタイム10日未満
肉厚0.75 mm
公差±0.125 mm(±0.005 インチ)
最大部品サイズ200 x 80 x 100 cm
Aluminum in CNC Machining

Aluminum CNC Machining Materials

6061 Aluminum CNC Machining

The default choice for most parts. Good strength, cuts cleanly, welds well and anodizes evenly. Used for brackets, housings, frames and general structural work.

引張降伏強度(MPa)
276
Fatigue Strength (MPa)
96
破断伸び(%)
17
硬度(ブリネル)
95
Density (g/cm³)
2.70

2024 Aluminum CNC Machining

High fatigue resistance, which is why it shows up in aircraft structures and truck wheels. Corrodes more readily than other alloys, so it usually needs a coating.

引張降伏強度(MPa)
325
Fatigue Strength (MPa)
140
破断伸び(%)
20
硬度(ブリネル)
120
Density (g/cm³)
2.78

5052 Aluminum CNC Machining

The marine alloy. Excellent saltwater corrosion resistance and easy to form, though strength is lower. Common in tanks, enclosures and sheet work.

引張降伏強度(MPa)
193
Fatigue Strength (MPa)
115
破断伸び(%)
12
硬度(ブリネル)
60
Density (g/cm³)
2.68

5083 Aluminum CNC Machining

Stronger than 5052 with the same corrosion resistance. Holds its properties at cryogenic temperatures, so it suits pressure vessels and cold storage equipment.

引張降伏強度(MPa)
275
Fatigue Strength (MPa)
125
破断伸び(%)
12
硬度(ブリネル)
75
Density (g/cm³)
2.66

6061-T6 Aluminum CNC Machining

Heat treated 6061. Same machinability with higher yield strength, for parts that carry real load. Slightly less ductile.

引張降伏強度(MPa)
276
Fatigue Strength (MPa)
96
破断伸び(%)
10-12
硬度(ブリネル)
95
Density (g/cm³)
2.70

6063 Aluminum CNC Machining

Softer than 6061 and chosen for appearance rather than strength. Takes the best anodized finish of any alloy here, so it suits trim, window frames and visible panels.

引張降伏強度(MPa)
214
Fatigue Strength (MPa)
65
破断伸び(%)
12
硬度(ブリネル)
73
Density (g/cm³)
2.70

6082 Aluminum CNC Machining

Structural alloy with better corrosion resistance than 6061. Common on European drawings for bridges, cranes and marine parts.

引張降伏強度(MPa)
260
Fatigue Strength (MPa)
97
破断伸び(%)
10-12
硬度(ブリネル)
95
Density (g/cm³)
2.70

7075 Aluminum CNC Machining

Close to steel strength at aluminum weight. Costs more and machines slower, but it is the standard for aerospace fittings, gears and high stress structural parts. Does not weld well.

引張降伏強度(MPa)
503
Fatigue Strength (MPa)
160
破断伸び(%)
11
硬度(ブリネル)
150
Density (g/cm³)
2.81

7075-T6 Aluminum CNC Machining

Heat treated 7075, the strongest alloy on this list. Used in aircraft structures, climbing hardware and performance automotive parts where failure is not an option.

引張降伏強度(MPa)
503
Fatigue Strength (MPa)
159
破断伸び(%)
11
硬度(ブリネル)
150
Density (g/cm³)
2.81

ADC12 (A380) Aluminum CNC Machining

A die casting alloy rather than a billet alloy. Good casting properties and corrosion resistance, machined for automotive parts, electronic housings and machinery components that start life as castings.

引張降伏強度(MPa)
160
Fatigue Strength (MPa)
130
破断伸び(%)
3.5
硬度(ブリネル)
80
Density (g/cm³)
2.74

Advantages and Limitations of Aluminum

Aluminum suits most machined parts, but it isn’t the right answer for everything. Here’s where it wins and where it falls short.

メリット
  • Light. At 2.7 g/cm³ it weighs roughly a third of steel, which matters in anything that moves or flies.
  • Corrosion resistant. It forms its own oxide layer, and anodizing thickens that layer further.
  • Conducts heat and electricity. Close enough to copper for heat sinks, enclosures and electrical housings.
  • Cuts fast. Higher feed rates mean less machine time, which shows up directly in your unit price.
  • Takes a finish. Anodizing, powder coating and polishing all work well, so cosmetic parts need no extra material.
  • Holds up in the cold. Unlike steel, it keeps its toughness at sub zero temperatures, which is why it’s used in cryogenic work.
制限事項
  • Soft. Pure aluminum marks easily, which is why parts are machined from alloys rather than the pure metal.
  • Costs more than steel. It has to be refined from bauxite, so raw stock prices sit above mild steel.
  • Scratches show. The soft surface picks up handling marks, and a polished or anodized finish makes them more visible.
  • Loses strength with heat. Above roughly 200°C it softens, so it’s the wrong choice near engines, exhausts or furnaces.
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CNC加工公差

当社のCNCマシンは、業界標準を満たす精密公差で動作し、すべての部品が一貫して正確で、他の部品と完全に適合することを保証します。.

フィーチャー・タイプ標準公差
一般寸法公差±0.025 mm(±0.001インチ)
高精度公差±0.005 mm(±0.0002インチ)
穴径(ドリル)±0.05 mm(±0.002インチ)
穴径(リーマ/ボア加工)±0.01 mm(±0.0004インチ)
シャフト径(旋削加工)±0.01 mm(±0.0004インチ)
平坦性100mmあたり0.02mm
パラレリズム±0.02 mm
垂直性±0.02 mm
表面粗さ(Ra)1.6~3.2 μm(63~125 μin)
位置公差±0.01 mm ~ ±0.02 mm
ねじ公差(カット)6H/6g(ISO)またはクラス2A/2B(ANSI)
最小フィーチャーサイズ0.5 mm (0.020インチ)
再現性±0.005 mm(±0.0002インチ)

Aluminum CNC Machining FAQs

6061 for most work. It machines cleanly, welds, anodizes evenly and costs less than the high strength grades. Pick 7075 only when the part carries serious load, and 6063 when the finish matters more than the strength.

Standard is ±0.125 mm (±0.005 in). We can go tighter on specific features if you call them out on the drawing, though tight tolerances across a whole part add cost without adding function.
Yes. Type II anodizing takes dye well in black, red, blue, gold and clear. Note that anodizing adds 5 to 25 μm per surface, so mask any feature with a tight fit.
Under 10 days for most orders. Simple prototypes move faster. Lead time depends on alloy availability, part complexity and the finish you specify.
7075, by a wide margin. Yield strength is 503 MPa against 276 MPa for 6061. The trade is cost, slower machining and poor weldability, so 7075 belongs on aerospace and high stress parts rather than general brackets and housings.
0.75 mm. Thinner walls chatter under the tool and distort once the part comes off the fixture. If your design needs thinner, send it over and we’ll tell you whether it will hold.
Yes. ADC12 arrives as a die casting and we machine the critical features afterwards, which is standard for automotive parts and electronic housings.