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Shop Gifts for the tile installer in your life
Shop Gifts for the tile installer in your life
Sigma 38F12PD Keraflex Grinder attachment for rail to achieve precision cutting and mitering comes with Sigma 75D diamond blade
Sigma Keraflex Grinder attachement for rail to achieve precision cuting and mitering
Sigma Kera flex close up
Sigma KERA-FLEX EXT 38F11PD Tile Cutter in Action
Sigma 38F12PD Keraflex Grinder attachment for rail to achieve precision cutting and mitering comes with Sigma 75D diamond blade
Sigma Keraflex Grinder attachement for rail to achieve precision cuting and mitering
Sigma Kera flex close up
Sigma KERA-FLEX EXT 38F11PD Tile Cutter in Action
video of Sigma Electric Saw Conversion of KERA-FLEX EXT for Tile Cutting

Sigma Kera-Flex 38F12PD

SKU 38F12PD
by Sigma
$310.00 - $310.00
$310.00
$310.00 - $310.00
$310.00

Sigma KERA-FLEX EXT 38F12PD Cutting System for Grinders

The Sigma KERA-FLEX EXT 38F12PD is a high-performance tile cutting system engineered for professionals who need fast, clean, and accurate cuts on dense tile materials. Built for use with grinders and designed to slide directly on the Sigma Kera-Cut guide rail, the KERA-FLEX EXT turns manual scoring into smooth, controlled saw cutting — ideal for working with large-format porcelain tile, slabs, and heavy-duty panels.

With an adjustable depth stop, anti-vibration dual wheel system, and integrated compatibility with dry or wet cutting setups, the 38F12PD gives installers total control and consistent results. Whether you're making plunge cuts, edge trims, or full panel passes, this compact system maximizes efficiency without compromising accuracy.

Key Features:

  • Integrated Cutting Depth Indicator – Adjustable stop prevents over-cutting and helps protect work surfaces

  • Stabilization System – Two contact wheels glide over the tile surface to reduce vibration and maintain tracking

  • Disc Visibility Sticker – External decal shows blade position for clean, predictable starts and stops

  • Wear-Resistant Wheel Bearings – Double ball bearing wheels for long-lasting, smooth rail travel

  • Dry or Wet Ready – Built-in port supports dust extraction or optional Waterkit for wet cutting

  • Includes Sigma 75D Diamond Blade – Diameter: 5" (125 mm) | Thickness: 0.055" (1.4 mm) | Arbor: 7/8" (22.2 mm) | Ideal for tile thicknesses from 3/16" to 1" (5–25 mm)

Specifications:

  • Max Cutting Depth: 1" (25 mm)
  • Disc Diameter: 4.92" (125 mm)
  • Blade Hole: 7/8" (22.2 mm)
  • Tool Interface: 5/8"-11 UNC thread (U.S. standard grinder)
  • Weight: 6.4 lbs 

Work faster, cut cleaner, and stay in control — the Sigma KERA-FLEX EXT 38F12PD is your go-to cutting upgrade for rail-based tile systems.

More Details

Discover the unparalleled capabilities of the KERA-FLEX EXT 38F12PD cutter, your ultimate partner for tile cutting projects. This cutter, equipped with a Sigma 75B Diamond Blade, is specifically designed for tile contractors and home remodelers seeking precision and speed. Its unique capability to perform both plunge and L cuts, combined with its transformational design that turns your Kera-Cut into an efficient electric saw, makes it a must-have tool. Specifically crafted for use with the TWO-PIECE KERA CUT RAIL ONLY, it guarantees precise and accurate cuts, enhancing the quality of your work. Whether dealing with complex designs or thick materials, up to 30mm, the KERA-FLEX EXT 38F11PD is your reliable solution for achieving professional-grade results in tile cutting.

What's Included

  • 1 Kera Flex Ext
  • 1 Kera Flex 75D 4.5" (115mm) Diamond Disc 22.2mm hole
Manufacturer

Sigma is a leading tile tool manufacturer, rooted in Italy’s renowned craftsmanship tradition. Specializing in high-quality tile cutters, tiling tools, and accessories, Sigma Italy equips professionals with cutting-edge products designed for precision and ease of use. Committed to innovation and quality, Sigma tools are essential for achieving flawless installations and beautiful finishes in any tiling project.

Let customers speak for us

from 478 reviews
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I've been using these spaces for years. I love them. I'm just a little nervous because they changed the color of the spacers. I think they were bought out so I'm not sure if they're going to be the exact same size. They changed The colors the white ones are now 1/16 instead of green they switched all the colors around. I'm glad I have all my old ones

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Well made and lots better then some other products that I had used in the past.

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The product worked great!. The effort to break off is much less than the previous product I was using from the orange store. These may cost a little more up front, but the ease of removal is worth it as I had a number of the previous products break off in between the tiles. And that can be a challenge to remove without damaging a tile edge. No doubt will purchase these again.

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Better than Dewalt and MK Diamond blades for cutting porcelain tile

Before finding the Helix Copperhead blade, I used Dewalt XP4 and MK Diamond MK-415 blades. Both of these blades generally have good reviews, but they cannot touch the Helix Copperhead for smoothness of cut, lack of chipping, and lack of breakout at the end of the cut. I use the Helix blade primarily on porcelain tile and the cuts look factory on rectified tile. My machine is a MK Diamond 10" wet saw with a belt-driven blade arbor. The only non-positive comment I will make concerns the thinness of the blade. It has a thickened center section, which helps the blade run true. However, because of the blade rim thinness, it is possible for the blade to deflect slightly if pushing the tile too fast - an effect that is easily remedied by slowing cutting speed.

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