Redditのr/3Dprintingに、3Dプリンターの副業で月2,000ドル（約30万円）を達成したという投稿が上がって話題になっています。

何を作って売っているのか

報告者が手がけているのは「市販品では対応できないカスタムパーツ」の受注制作です。具体的には機械の補修部品や、絶版になった周辺機器のアダプターなど。一般のECサイトでは売っていないけれど、確実に困っている人がいる領域を狙っています。

When we think about 3D printers, it's easy to just imagine industrial parts or intricate figurines, right? But guess what? There are people out there making serious bank with super everyday items. I stumbled upon a post on Reddit's r/3Dprinting that made me do a double-take – like, is this for real?

Etsy Seller Makes $2000 Monthly with 3D Printed Cookie Cutters

The title was as direct as it gets: "Made 2000 on Etsy selling 3D printed cookie cutters." This person reported selling $2000 (roughly 300,000 yen) worth of cookie cutters on Etsy last month alone. Talk about a dream come true!

使用機材はCreality Ender-3 S1 Proで、素材はPLAとTPUを用途別に使い分けているそうです。特別高価な機材ではなく、設計力と顧客対応力が収益の柱になっているのが特徴です。

キーワードは「ニッチな需要への特化」

汎用品と価格競争をしても勝ちにくいのが3D印刷品の市場です。この報告者が月30万円を維持できている理由は、メーカーが作らないサイズや素材への対応と、納期の速さにあります。Etsyの検索でヒットしやすいロングテールワードを狙った出品戦略も参考になります。

参入のハードルと現実

同じ戦略で同じ収益が出るとは限りません。設計ソフト（Fusion 360やBlender）の習得に時間がかかりますし、顧客との仕様のすり合わせや再印刷コストも発生します。月30万円は副業としては魅力的ですが、最初の数ヶ月は赤字覚悟でノウハウを積む期間が必要です。

それでも「机の上の機械が動いている間に収益が生まれる」という体験は、モチベーションを維持する大きな原動力になるようです。

A Housewife Earning $2000? The Secret is in the Gear and Material

The equipment they're using? An Ender 3 S1 Pro. This is an entry-level model you can snag for around $200! The fact that it's not some fancy industrial machine makes you think, "Hey, maybe I could do this too…"

For materials, they're using PETG. Not PLA, but PETG – which makes sense for food-contact items, prioritizing safety. This kind of attention to detail likely builds a loyal customer base. You can check out the original post here if you're curious!

Is Custom Order the Game Changer?

Apparently, 70% of this seller's revenue comes from custom orders. This means they're catering to unique requests like, "I want a cookie cutter shaped like my pet!" or "Can you make a cookie cutter of my favorite character?" This is probably the key differentiator.

They're using a 3D printer to quickly fulfill niche demands that regular stores wouldn't touch. This combination of speed and customization is really hitting the mark in today's market. And get this – their profit margin is an astounding 60-70%! Even after materials and overheads, they're taking home a significant chunk. Honestly, this is practically a full-time job!

The Potential of Niche x 3D Printer

People often think 3D printers are hard to master or that they don't know what to make. But this example clearly shows how everyday items can become a real business. While I don't fully grasp the behind-the-scenes mechanics (like Etsy fees), the simplicity of this idea is incredible.

It's about tapping into small but definite demands from people with specific hobbies, like "My dog is a Shiba Inu, so I want a Shiba Inu cookie cutter!" Now that 3D printers are affordable for individuals, I bet we'll see more and more creative side hustles like this. It's got me genuinely excited to try making something myself!