SKU: 68006697169

Blackmagic Design Spares - Camera URSA Mini - Main Chassis

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Description

Blackmagic Design Spares - Camera URSA Mini - Main ChassisThe Blackmagic Design Spares Camera URSA Mini Main Chassis is the central "skeleton" of the camera system. Unlike the side panels or the top escutcheon, which are exterior skins, the Main Chassis is the internal structural frame that everything elsethe sensor, the global shutter mechanism, the cooling system, and the primary circuit boardsbolts onto. It is precision engineered to provide the absolute rigidity required for a professional cinema camera.

The Blackmagic Design Spares - Camera URSA Mini - Main Chassis is the central "skeleton" of the camera system. Unlike the side panels or the top escutcheon, which are exterior skins, the Main Chassis is the internal structural frame that everything else—the sensor, the global shutter mechanism, the cooling system, and the primary circuit boards—bolts onto.

It is precision-engineered to provide the absolute rigidity required for a professional cinema camera.

The Foundation of Optical Precision

The most critical role of the chassis is maintaining the Flange Focal Distance.

  • Zero Flex: The chassis ensures that the distance between the lens mount and the sensor remains constant to within microns ($0.001\text{mm}$), even when a $15\text{kg}$ cinema zoom lens is mounted to the front.

  • Thermal Sink: The magnesium alloy is designed to draw heat away from the sensor block and transfer it toward the "wind tunnel" where the fan can exhaust it.

  • Grounding Plane: The chassis acts as a unified electrical ground for the entire camera, reducing the risk of static interference or "hum" in the audio and video signals.

Compatible Models

The chassis is the core of the "Mini" form factor and is shared across:

  • URSA Mini 4K / 4.6K

  • URSA Mini Pro 4.6K (G1 & G2)

  • URSA Mini Pro 12K

  • URSA Broadcast / Broadcast G2

When to Replace the Main Chassis

Replacing the chassis is a "Level 3" (Total Strip-down) repair. It is usually only necessitated by catastrophic events:

  • Structural Cracking: Magnesium is incredibly strong but brittle. A high-velocity impact (like a camera falling off a tripod onto concrete) can crack the frame. Once the frame is cracked, the lens mount will no longer be "square" to the sensor, making it impossible to achieve sharp focus across the entire frame.

  • Stripped Internal Standoffs: If the internal threaded standoffs that hold the Main PCB or the Sensor Block are stripped or snapped, the internals will "rattle," leading to intermittent electrical failures or sensor misalignment.

  • Fire or Extreme Heat Damage: If a camera is caught in a fire or suffers a major electrical short that melts internal mounting points, the chassis must be replaced to ensure the safety and alignment of new components.

  • Corrosion: In extreme maritime environments, if salt water enters the camera, it can cause "pitting" in the magnesium. This can eventually compromise the structural integrity of the mounting points.


Technical Installation Note: The "Total Rebuild"

Replacing a chassis is effectively building a new camera using the "guts" of the old one.

  • The Sensor Block: The most delicate part of the transfer is moving the sensor assembly. This must be done in a clean-room environment (or at least a very high-quality dust-free workspace). Any dust that gets between the sensor and the chassis during the move will be visible in every frame you shoot.

  • Thermal Paste/Pads: You must replace all internal thermal interface materials. The old pads will be compressed and dry; using them in a new chassis will lead to immediate overheating issues.

  • Screw Mapping: You will be removing over 50 screws of varying lengths, diameters, and thread pitches. Mapping these is mandatory. Using a long screw in a chassis hole intended for a short one can punch through and destroy the Main PCB.

  • Shimming: After a chassis swap, you must re-check the flange distance. Even with a precision OEM chassis, the stack-up of tolerances means you will likely need to re-shim your lens mount to ensure your "infinity" focus is accurate.

Expert Advice: If your camera body is simply scratched or scuffed, do not replace the Main Chassis. Instead, look for the Right/Left Side Panels or the Top Escutcheon. You should only undertake a chassis replacement if the camera has suffered a structural failure that affects the image or the ability to mount lenses securely.

Did the camera suffer a major fall, or are you seeing "softness" on one side of your image that suggests the mount is no longer square?



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SKU: 68006697169

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A pain to put on the wall
4 stars only because to actually screw it into the wall you need either an angled screw driver, which we had to go buy, or a really really short screwdriver as the one that came with it is just a tad to long. Also the mollies that come with it our cheap and would not hold up on regular dry wall, which we found out, thank goodness, before we finished hanging it. As we were hanging it the top pulled right out of the wall. We had heavy duty ones at home already and used those. The shelf was a breeze to actually put together and once we got past the trouble of hanging it, is wonderful and looks great. So, 1. buy a better screwdriver, and 2. get heavy duty mollies.
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Pretty and practical
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I love the rustic wood and iron look. It’s sturdy, spacious, and exactly what I needed in my basement apartment. I ended up buying another one to make it one long shelving unit. I highly recommend them!
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Carnegie, US
★★★★★ 5
Very handsome and functional shelf with a ton of space!
I was looking for a black wall shelf to go above our coffee bar that included a bar with hanging hooks for empty glasses and a bar towel. This shelf met those needs, and I'm very impressed with it overall. It's a bit pricey for how simplistic it is, but it doesn’t feel or look cheap. Assembly and installation with the provided hardware was easy with help of a drill. The shelves are deep and work well for storage baskets and larger items. It’s a sharp-looking piece that really improved the look of our expanded coffee bar.
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West Palm Beach, US
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Wonderful shelf but difficult to install!
Size: 41 Inch Extra Long, Color: Rustic Brown, Size: 41 Inch Extra Long, Color: Rustic Brown
I absolutely love this shelf. It's perfect over our coffee bar and is extremely sturdy. Assembling it was very easy, but hanging it was challenging. The design could definitely use a little improvement. My husband had to order an angles drill adapter to be able to get the screws in. He also bought different anchors than what came with it. But now that it's up it looks fantastic!
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Juan Salgado
Dallas, US
★★★★★ 5
Great gift
Size: 41 Inch Extra Long, Color: Rustic Brown
This pipe shelving set delivers outstanding quality all pieces arrive nothing missing or damaged—the metal piping is sturdy and the wood shelves feel solid and well-crafted, not flimsy or cheap. The look is a perfect blend of rustic charm and industrial edge, making it an eye-catching addition to any farmhouse-style kitchen, bathroom, or living room. In terms of durability, it holds weight well without sagging, and installation is straightforward with secure brackets that stay put. Bonus: It’s not just decorative—it’s functional. Whether you're displaying plants, books, or jars, it adds both style and smart storage to your space. of course there are better higher quality one out there but these excellent value for you money.
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Reviewed in the United States on June 30, 2025

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