Brim CAD

Model parts for 3D printing

Only for Mac

Free

Mac

Brim CAD is a CAD app for things you print. Everything is in millimetres, Z is up, and the plate under the model is your printer's bed. What sits on it is what comes out. It is built for parts that have to fit other parts: a gear on a shaft, a lid on a case, a screw in a hole. You type the numbers, the app builds the part, and the file your slicer gets is closed and the right size. START FROM A SHAPE • 36 shapes, each drawn as a picture of itself: blocks, tubes, threads, springs, knurled knobs, vases and lettering. • Gears, sprockets, belt pulleys, chains, ratchets, cams, splines, worm drives and augers, built from module, teeth and pitch. • Name ornaments, snowflakes, star shapes and radial patterns. • Panels and fittings: vent grilles, insert bosses, print-in-place hinges and ball joints, encoder discs, fans and impellers. • 15 whole jobs: a case with a lid and screw bosses, a hose adapter, a fit-test coupon, a sundial for where you live, a lithophane, a QR code plate, a jigsaw and more. • A shape keeps its numbers. Reopen it later and change 20 mm to 22 mm instead of drawing it again. WORK EXACTLY • Every drag lands on the snap step. Start a drag and type a number to move by exactly that much. • A ruler, sizes round the selection, kept measurements and guides you can send parts to. • Look inside a part through a guide plane without cutting it. CHANGE A BODY • Add, subtract and intersect bodies. • Fillet or chamfer an edge, push and pull a face, cut ISO clearance holes for screws. • Write on a face, texture it, cast a cavity, make a body lighter, repeat it in a row or round a circle, mirror and align. • Draw a sketch and extrude, revolve or sweep it. Make a cookie cutter, a stamp, a stencil or a shadow sculpture from a drawing. • Trace a photo or a drawing into an outline, and model over a reference picture you have calibrated to size. KNOW IT WILL PRINT • Overhangs steeper than your limit turn red. • Before you print checks for open surfaces, faces that cross, parts off the bed, parts too big for your printer and walls thinner than the nozzle. • A part too big for the bed splits into equal pieces, pinned back together. Pins, tongues, dovetails and snap fits join any two bodies. • Fit clearance, shrinkage and a chamfer for elephant's foot are settings, and a fit-test coupon tells you the right numbers for your own printer. IN AND OUT • Open in your slicer in one click: Bambu Studio, Orca, PrusaSlicer or whatever you use. • Export 3MF, STL, OBJ and USDZ. 3MF keeps the unit, the names, the colours and where each part sits on the bed. • Import STL, 3MF, OBJ, USDZ, PLY and SVG. • Quick Look previews and thumbnails of your projects in the Finder. • A part library for the brackets and knobs you make again and again, and presets for the numbers you keep. A manual is built in, in ten chapters, from your first part to the keys and gestures. It also says plainly what the app does not do. Brim CAD works on meshes, the same thing your slicer reads. There is no parametric history and no constraint solver, and that is on purpose: it is made to be learned in an evening. No account, no tracking, and nothing you make leaves your Mac unless you send it.

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Enclosures • A sliding lid now runs in a real groove round three walls and stops against the back, instead of lifting straight out. It slides in at any corner radius. • A sliding lid can sit level with the top: a raised panel fills the opening and the front, so the closed case is flat. • Snap-fit lids hold on a flat face rather than a thin ridge, and every lid comes out lying the way it prints. • Screw holes in the lid can be plain, counterbored for a socket cap or countersunk for a flat head. • Place openings from the middle of a face, as a datasheet does, or from the corner, as a caliper reads the finished box. • Cut-outs and vents in the lid, and round holes in the walls go all the way through. • Rounded corners of any radius keep the groove and the screw posts inside the wall. Previews • The preview in every wizard shows the sizes round the shape, and where each opening sits. A switch hides them. • Larger previews, with no more flicker where a part stands on the bed. Lattices and sketches • 18 new lattice patterns, among them rosettes, Moroccan lanterns, star and cross, hemp leaf, chevrons and tumbling blocks. • A fade can turn the openings as well as shrink them. • Sketching helps more: snapping, typed side lengths, axis lock, mirror and closing a shape, and point coordinates you can type or nudge. Also • Projects saved before the rename open again. • Fixes for the Russian interface and the tooltips.

The developer, Igor Fuchkin, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Seller
    Igor Fuchkin
    Size
    8.3 MB
    Category
    Graphics & Design
    Compatibility
    Requires macOS 26.0 or later.
    • Mac
      Requires macOS 26.0 or later.
    Languages
    English and Russian
    Age Rating
    4+
    Copyright
    © Igor Fuchkin