Kato Unitrack 315mm Radius 45-Degree Curve Track (4-Piece) for N Gauge Layouts

This 315mm radius 45-degree curve track pack from Kato's Unitrack system includes four pre-ballasted pieces for building smooth N gauge layouts. The nickel silver alloy rails resist tarnishing, which cuts down on cleaning and keeps electrical conductivity reliable. Each section connects via the Unit-joiner clip—a removable wired connector that locks securely without soldering. Whether you're expanding a starter set or designing a permanent layout, these curves help shape gentle 25-inch diameter circles (double the radius). Track radius is measured from the circle's center to the rail centerline, making planning straightforward.

Track specifications

How the Unitrack system simplifies track building

The rails use a special nickel silver formulation that resists oxidation. This means less frequent cleaning compared to standard nickel silver tracks—a genuine time-saver for regular operators. Each track piece comes with the roadbed attached, so you can set up temporary layouts on carpet or tables without extra matting. For permanent installations, the integrated ballast strip can be painted or weathered to blend with scenery. The Unit-joiner clips include built-in wire connections, so power flows reliably between sections without separate jumper wires.

What you get in the pack

• 4 curve tracks (315 mm radius, 45° each)
• Wired Unit-joiner connectors pre-installed on each piece
• Snap-together assembly—no tools required

Frequently asked questions

What diameter circle does four pieces make?

Four 45° curves form a 180° half-circle; you need eight pieces for a full 360° circle. The circle diameter is approximately 25 inches (635 mm)—double the radius measurement.

Can I use these curves with older Kato Unitrack?

Yes. All Unitrack pieces are forward- and backward-compatible, regardless of when they were made. The connector design has remained consistent.

Do I need to solder the joints?

No. The Unit-joiner clip secures mechanically and carries current through its internal wire. For layouts longer than a few feet, add feeder wires every few sections—soldering is not required.

Ideal for expanding N gauge layouts

This curve pack is a convenient way to add gentle turns to your existing track plan. The 315 mm radius works well with most N scale locomotives and rolling stock, including long passenger cars. Because the roadbed is already attached, you can test configurations quickly before committing to a permanent arrangement. For tight spaces, combine with shorter radius curves (e.g., 282 mm) to create compact S-curves or reversing loops.