● 17 min readShowdown: Uno R4 vs Uno R3 vs Nano
Welcome to Vol. 12 of The Probots Showdown. Three boards. Three price points. Three very different futures for your project.Should you stick with the
Read Article →| Bulk Pricing | ||
|---|---|---|
| QTY | Unit Price(Inlc. GST) | |
| 25+ | ₹127.71 ₹ 108.23 + 19.48 GST | |
| 50+ | ₹126.42 ₹ 107.14 + 19.29 GST | |
| 75+ | ₹122.55 ₹ 103.86 + 18.69 GST | |
| 100+ | ₹121.26 ₹ 102.76 + 18.5 GST | |
Premium black anodized die-cast aluminum corner bracket. Designed for high-rigidity 90-degree joints in 2020 series V-Slot and T-Slot profile frames.
Struggling with wobbly frames or misaligned corners in your latest build? Whether you're assembling a high-performance 3D printer, a desktop CNC, or a custom lab enclosure, the foundation of your project depends on perfectly square 90-degree joints. The Black 90° Corner Connector Bracket is engineered specifically for 2020 V-Slot and T-Slot profiles, providing the structural backbone your machine deserves.
Probots™ ProSpec Grade Construction Unlike cheap, thin-stamped brackets that flex under load, these connectors are Probots™ ProSpec Grade . Die-cast from high-density aluminum alloy and finished with a premium black anodized coating, they offer superior structural rigidity. This ensures that even under the high vibrations of a 3D printer or the torque of a CNC motor, your frame stays rock-solid and perfectly aligned.
Material: Die-Cast Aluminum Alloy (ADC12)
Finish: Industrial Black Anodized (Corrosion Resistant)
Compatibility: 2020 Series (20mm x 20mm) V-Slot & T-Slot Profiles
Angle: 90 Degree (Right Angle)
Dimensions: 20mm x 20mm x 17mm
Mounting Hole Size: 9mm x 6mm (Standard Oval Slot)
Fastener Compatibility: Optimized for M5 Low-Profile or Button Head Screws
High-End 3D Printers: Essential for Voron, RatRig, or Creality frame reinforcements.
Desktop CNC Routers: Provides the necessary bracing for precision axis movement.
Camera Sliders & Rigs: Sleek black finish is perfect for professional photography gear.
Modular Workstations: Build custom electronics benches with a clean, "stealth" aesthetic.
Unlock New Capabilities (Project Evolution)
Past Projects: If you have previously relied on basic 3-way corner cubes or internal hidden L-joints, you know they can be difficult to tighten once the frame is fully assembled.
Feature Upgrade: These external corner brackets allow for post-assembly reinforcement and "squaring up" without dismantling the entire rail system.
Effort Level: Beginner. Simply slide in T-Nuts and bolt directly to the profile face.
Virtual Technician & Wiring
Probots™ Logic-Safe Alignment: To ensure a perfect 90° joint, we recommend using a machinist's square during assembly. Tighten the M5 screws incrementally to prevent the bracket from "walking" as the T-Nut seats in the slot.
Fastener Tip: Use M5x8mm or M5x10mm screws. For the cleanest look, use Black Oxide Button Head screws to match the bracket finish.
1 x 90° Corner Connector Bracket (Black Anodized)
(Note: T-Nuts and Screws are sold separately)
Does this fit standard T-Slot profiles from local suppliers? Yes, it is compatible with both European standard 2020 T-Slot and V-Slot profiles.
Is the black finish paint or anodized? It is professionally anodized, which is more durable and scratch-resistant than paint.
What is the benefit of the oval mounting hole? It allows for slight adjustment during assembly to ensure your frame is perfectly square.
Can I use M6 screws with this? No, the hole is designed for M4 or M5 screws, with M5 being the recommended standard.
How many do I need for a 3D printer cube frame? For a standard 4-post cube, you typically need at least 8 brackets (2 per vertical pillar).
Will the black finish peel off over time? No, anodization is an electrochemical process that becomes part of the metal surface.
Is this bracket compatible with 2040 profiles? Yes, it fits perfectly on any 20mm face of a 2040 or 2060 profile.
Do I need to drill holes in my aluminum profile? No, these brackets use the existing slots and T-Nuts for a "no-drill" assembly.
Is this stronger than the hidden L-shape internal connectors? Yes, external corner brackets generally provide higher structural rigidity against twisting forces.
What is the weight of one bracket? Each bracket weighs approximately 15 grams.
Can these be used for outdoor structures? Yes, the aluminum alloy and anodized finish are highly resistant to rust.
What screw length do I need? M5x8mm is the standard; use M5x10mm if you are adding a washer.
Are these brackets sold in packs? These are sold individually so you can buy the exact amount your project requires.
Is there a "right side up" for these? No, they are symmetrical and can be used in any 90-degree orientation.
Can I use these to mount panels? While primarily for joints, they can be used as a support ledge for acrylic or wood panels.
Are the edges sharp? No, these are die-cast with rounded edges for safe handling.
What happens if I over-tighten the screw? The bracket is cast aluminum; over-tightening might strip the T-nut or dent the profile before breaking the bracket.
Can I use these with 1-inch (80/20) profiles? No, these are specifically for the 20mm metric series.
Do they come with a warranty? They are covered under the standard Probots quality guarantee against manufacturing defects.
Is the color a matte or glossy black? It is a professional semi-matte industrial finish.a




Probots sells every Electronics Part for your next Project. You can order 10,000+ Electronic Parts Online - Arduino, Raspberry Pi, NodeMCU Development Boards, Sensors, Motors, Motor Drivers, SMPS, Plastic Enclosures etc in India directly on probots.co.in
We delivery electronics components and parts throughout India using standard couriers like Bluedart, Delhivery & India Post.
For order related queries contact -
Probots sells every Electronics Part for your next Project. You can order 10,000+ Electronic Parts Online - Arduino, Raspberry Pi, NodeMCU Development Boards, Sensors, Motors, Motor Drivers, SMPS, Plastic Enclosures etc in India directly on probots.co.in
We offer specialized services for Bulk, Wholesale & B2B Customers like discounted prices, additional shipping options, customised products, etc . Customer with large quantity & regular orders qualify for the specialised discounted rates.
We also offer dedicated sales team to assist you with the order process by providing sales quotations, PI, technical support for choosing products, etc.
Note: Business Orders are processed manually and usually take 1-3 days to process compared to placing the order directly on our website. Please plan your purchases accordingly.
Need Help?
For bulk enquiries contact us by -
Probots Electronics is highly regarded for its great selection of components and professional service. Customers frequently praise the awesome care and timely delivery provided by the team to ensure all products arrive safely.
● 17 min readWelcome to Vol. 12 of The Probots Showdown. Three boards. Three price points. Three very different futures for your project.Should you stick with the
Read Article →
● 10 min read12 projects. One board. Zero excuses. From a radar scanner that maps your room to a voice-controlled robot car you command with your phone — this is w
Read Article →
● 20 min readIf you have outgrown the basic “blinky” boards but aren’t ready to spend hundreds of dollars on enterprise gear, the Tang Primer 25K
Read Article →