At the moment, I’m leaning towards using calc, but I’m still figuring out the best practices here. In the meantime, understanding this math will help me add a little bit more polish to interfaces with rounded corners.

RadiusCornerMoulding

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Radius Base OutsideCornerMoulding

Jonard Tools is committed to manufacturing our products with premium-quality materials for all our tools including our fiber slitters. As the low voltage industry changes and new technology is introduced, it is Jonard Tools’ mission to provide tools that meet the latest needs of all fiber optic and cabling technicians.  We take pride in manufacturing tools using premium-quality materials to ensure technicians across a broad spectrum of fields and industries have the most reliable and durable fiber topic slitting tools with them at any job site. Our dedication to the quality of the tools we offer is why we back most of our tools with our Made for Life®, Guaranteed for Life policy.

I’m not Cloud Four’s resident circle expert, but thinking about rounded corners as circles helped me understand the math behind nesting rounded corners. To nest one circle inside of another, the inner circle needs a smaller radius than the outer circle.

We solve complex responsive web design and development challenges for ecommerce, healthcare, fashion, B2B, SaaS, and nonprofit organizations.

Plywood Radius Corners

For more detailed information on our slitting and ringing tools or other products in our fiber optics tool category, please visit the designated category section above. You will find the following section and corresponding Jonard Tools part numbers:

Radius corners for Cabinets

Paul Hebert is a hybrid designer and developer at Cloud Four. When he's not designing and developing websites he enjoys bouldering, drawing, cooking, gardening, and eating too much cheese.

Jonard Tools manufactures over 40 unique fiber slitters and fiber ring tools for technicians working in the fiber optics industry.

We solve complex responsive web design and development challenges for ecommerce, healthcare, fashion, B2B, SaaS, and nonprofit organizations.

Slitting & Ringing Tools     • AST-200     • AST-200RB     • BTR-6     • CSR-1575     • CSR-2     • EZSR-23     • FOD-2000     • FOD-RB25     • FOR-3000     • FOR-3000RB     • JIC-4366     • JIC-4377     • MS-26     • MS-306     • MS-306RB     • MS-316     • MS-316RB     • MS-326     • MS-336     • MS-336RB     • MS-426     • MS-426RB     • MS-446     • MS-446RB     • MS-526     • MS-526RB     • MS-6     • MSB-1533     • MSB-2968     • MSB-5010     • RB-2060/6     • RB-2878/6     • RCS-25     • RCS-25RB     • RCS-30     • RCS-30RB     • RCS-50     • RCS-50RB     • RST-8514     • RST-RB25

Jonard Tools manufactures over 40 unique fiber slitters and fiber ring tools for technicians working in the fiber optics industry.

Radiused cornermeaning

Jonard Tools manufactures over 40 unique fiber slitters and fiber ring tools for technicians working in the fiber optics industry.

But, I quickly ran into a problem. When I nested an element with a rounded corner inside of a rounded container it looked off somehow:

Radiused cornerangle

I’m not sure what this means yet when it comes to managing border-radius tokens in design systems. Should we be storing multiple border-radius tokens (inner and outer)? Or does it make more sense to store one primary radius token, and dynamically calculate the rest using calc?

MDF RadiusCornerMoulding

I was recently designing an interface with a lot of rounded corners. I wanted to make sure the corners were consistent, so I created a --border-radius custom property and went wild rounding those corners.

To fix this, I had to take a step back and think through how CSS border-radius actually works. It can be helpful to imagine each corner holding a little circle. What border-radius is actually doing is setting the radius of these tiny circles.

The difference between the two circles’ radii is the gap between the outer circle and the inner circle. We can apply this same logic to determine the correct value for our rounded corners.

Jonard Tools’ fiber slitting tools include our popular and patented mid-span slitting tools (MS line), which includes the new MS-446, Mid Span Slit & Ring Tool which is designed to be used on AFL's Heavy Duty OSP MicroCore® (LMHD-Series) cables, and other thick-walled 8.7 to 14.6 mm diameter jackets. These fiber slitters also include tools that are on the opposite side of the size spectrum, such as the MS-6, Mid Span Slitter (1.2 mm-3.3 mm). This patented and award-winning MS-6 is designed to provide easy access to optical fibers in outer jackets and loose buffer tubes. It features six precision grooves to handle various cable sizes. The ergonomic design allows a user to open a fiber jacket or buffer tube without damaging the fiber inside.  The Jonard Tools catalog of fiber slitting tools also includes the patented and award-winning AST-200, CableSaber. The AST-200’s unique design allows a user to gain mid-span access to armored or thick jacketed cables 4 mm-28.6 mm (0.157”-1.125”) in diameter. This fiber slitter comes with an adjustable blade that can be easily adjusted with a thumb screw and can be extended up to 5.5 mm. The blade on this fiber slitter can be set to be in a longitudinal position for slitting or a radial position for ringing.

Jonard Tools’ fiber slitting tools include our popular and patented mid-span slitting tools (MS line), which includes the new MS-446, Mid Span Slit & Ring Tool which is designed to be used on AFL's Heavy Duty OSP MicroCore® (LMHD-Series) cables, and other thick-walled 8.7 to 14.6 mm diameter jackets. These fiber slitters also include tools that are on the opposite side of the size spectrum, such as the MS-6, Mid Span Slitter (1.2 mm-3.3 mm). This patented and award-winning MS-6 is designed to provide easy access to optical fibers in outer jackets and loose buffer tubes. It features six precision grooves to handle various cable sizes. The ergonomic design allows a user to open a fiber jacket or buffer tube without damaging the fiber inside.  The Jonard Tools catalog of fiber slitting tools also includes the patented and award-winning AST-200, CableSaber. The AST-200’s unique design allows a user to gain mid-span access to armored or thick jacketed cables 4 mm-28.6 mm (0.157”-1.125”) in diameter. This fiber slitter comes with an adjustable blade that can be easily adjusted with a thumb screw and can be extended up to 5.5 mm. The blade on this fiber slitter can be set to be in a longitudinal position for slitting or a radial position for ringing.  For more detailed information on our slitting and ringing tools or other products in our fiber optics tool category, please visit the designated category section above. You will find the following section and corresponding Jonard Tools part numbers:   Slitting & Ringing Tools     • AST-200     • AST-200RB     • BTR-6     • CSR-1575     • CSR-2     • EZSR-23     • FOD-2000     • FOD-RB25     • FOR-3000     • FOR-3000RB     • JIC-4366     • JIC-4377     • MS-26     • MS-306     • MS-306RB     • MS-316     • MS-316RB     • MS-326     • MS-336     • MS-336RB     • MS-426     • MS-426RB     • MS-446     • MS-446RB     • MS-526     • MS-526RB     • MS-6     • MSB-1533     • MSB-2968     • MSB-5010     • RB-2060/6     • RB-2878/6     • RCS-25     • RCS-25RB     • RCS-30     • RCS-30RB     • RCS-50     • RCS-50RB     • RST-8514     • RST-RB25

Jonard Tools is committed to manufacturing our products with premium-quality materials for all our tools including our fiber slitters. As the low voltage industry changes and new technology is introduced, it is Jonard Tools’ mission to provide tools that meet the latest needs of all fiber optic and cabling technicians.  We take pride in manufacturing tools using premium-quality materials to ensure technicians across a broad spectrum of fields and industries have the most reliable and durable fiber topic slitting tools with them at any job site. Our dedication to the quality of the tools we offer is why we back most of our tools with our Made for Life®, Guaranteed for Life policy.