Download tested STL packs with load ratings and printer settings. Outfit your rack, cables, and storage in hours, for 70–90% less than retail.
Retail attachments are expensive, generic, and rarely fit your exact setup properly. Random files online skip testing, lack load ratings, and print poorly without dialing in settings. Our STL packs are stress-tested with clear settings, so you print once and train daily with confidence.
Your cable row grip is too narrow. The generic J-cup spacer wobble leaves your bar scuffed. Foam roller caps vanish, storage hooks cost more than plates. You keep improvising and skipping sets. Every week of delay drains motivation, wastes money, and stalls progress.
The small geometry differences between racks and bars change safety and feel. FitBody3D files are stress-tested, include load ratings, and ship with tuned printer profiles per material. Before: a generic grip spins on your bar. After: our knurled insert prints in 2.2 hours and holds 68 kg.
FitBody3D started when our founder, Alex Ramirez, hacked a grip to fix a nagging elbow pain from narrow cable handles. The quick fix worked, but the print failed under load the next week. That moment sparked a mission: test, rate, and publish fitness prints that hold up. Alex brought a mechanical design background and a home gym obsession, iterating through dozens of prototypes and materials. Early files cut wobble on a quirky rack and saved friends real money. We wrote clear print profiles, documented tests, and standardized fit notes. Today, the catalog helps makers dial prints that feel right and last longer.
We publish the specific test setup, material, infill, and wall settings used to reach a rating. You can match or exceed the setup, or choose lighter prints for non-load uses.
Our guides cover nozzle, layer height, walls, infill, and temps tailored to the geometry. Expect fewer brittle failures, smoother fit, and better surface grip on handles.
We call out tolerances and shims where manufacturers vary. You get snug installs without sanding marathons or sketchy zip-tie fixes.
We iterated geometry in CAD, then tested prints under progressively heavier pulls. The result: firm traction and reduced wrist strain on rows, pulldowns, and curls.
Mounting surfaces and filleted edges protect your gear. Clearances and radii are tuned to minimize rub, even on powder-coated parts.
Micro-texture and diameter options let you customize feel. Many users report reduced elbow flare and better lat engagement on pulldowns.
We log changes, note why they matter, and email update highlights. Your prints improve over time without buying new parts.
We call out where printed parts are suitable and where factory metal is still the better choice. Your training stays confident and informed.
Choose a themed pack for cables, storage, or grips based on your setup. In two minutes, you’ll know fit notes, load ratings, and material options.
Grab STL files and the matched print profile for your material. In 10–15 minutes, slice and preview tolerance areas so first prints seat cleanly.
Expect 1.8–3.2 hours for most parts, then simple fit checks and light-load pulls. The first successful pull feels good and takes the worry out of your session.
Mount in minutes using the fit notes and recommended hardware. You get stable, comfortable movement and the satisfaction of gear that finally feels tuned.
Real experiences from people who trust us
“I printed two cable heads and a grip in 3.1 hours and saved $128 compared to retail. The knurled insert doesn’t spin and handled a 60 kg pull. It feels purpose-built for my rack.”
“The PETG profile nailed first layer adhesion and strength. We cut failed prints by about 58% over our baseline. Fit notes were spot on for 2x3 tubing—zero sanding, zero wobble.”
“Ergonomic diameter options mattered. Clients reported less wrist strain, and my own pulldowns felt smoother. The handle wobble dropped roughly 90% after swapping in their spacer.”
“I filmed a build with their nylon profile and avoided reprints entirely. Filament use was 36% lower than my old settings, and the hook passed a 20 kg plate hang test.”
“We equipped three racks with storage cradles and cable heads in one afternoon. Parts were consistent, and the team loved the grip texture. This saved about $420 for the gym—no compromise.”
One themed STL pack with load ratings and material profiles. Ideal for a specific upgrade.
Three popular packs for cables, grips, and storage—our most-used bundle for home gyms.
Unlimited downloads, all updates, and member tutorials. Best for builders and creators.
Everything you need to know
Printed parts have limits. Our files include static pull ratings with the test setup and material used, so you can make informed choices. For very high loads or impact, factory metal is still the better option. Use our safety notes to decide when prints are appropriate for your goals.
Most users report 1.8–3.2 hours for a grip or attachment, including slice and a quick fit test. Storage hooks and spacers are typically faster. Complex heads may need a small test piece first, which we flag in the file notes.
We publish tuned profiles for PLA+, PETG, and nylon that work on common consumer printers. You can adapt settings for your machine, and we call out geometry areas where tolerance matters. If you’re unsure, send your slicer preview and we’ll help.
We test printed parts on a controlled rig with progressive static loads and stop points. Ratings reflect the material and settings listed in the file notes. Your results may vary; always start with lighter loads and increase gradually.
Yes, for personal use. We include shim options and tolerance notes to reduce the need for editing. If you want to publish remixes, contact us for creator-friendly terms so users understand the changes and safety implications.
If you own a printer or plan to buy one, want better fit and comfort, and enjoy DIY upgrades, you’ll likely love it. It might NOT be for you if you need extreme loads daily, dislike tinkering, or prefer ready-made gear without any setup.
Free files can be great, but quality varies. Many lack load ratings, fit profiles, or tuned settings. Our catalog focuses on tested parts with clear notes, which reduces reprints and increases confidence under load.
If a file doesn’t fit after following our notes, contact us with photos and your slicer profile. We’ll troubleshoot first. When fit isn’t achievable for your rig, we typically approve a refund on that pack. Our current request rate is about 1.8%.
No. We sell downloadable STL files and profiles only. This keeps costs low and allows you to customize. For those without printers, we share affiliate links to trusted suppliers and recommend local print services where appropriate.
We use reputable payment processors and do not store card numbers on our servers. Only essential account data is retained. You can request deletion of your account data at any time through support.
Download tested STL packs with load ratings and printer settings. Outfit your rack, cables, and storage in hours, for 70–90% less than retail.
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